1 /* vi: set sw=4 ts=4: */
3 * Busybox main internal header file
5 * Based in part on code from sash, Copyright (c) 1999 by David I. Bell
6 * Permission has been granted to redistribute this code under GPL.
8 * Licensed under GPLv2, see file LICENSE in this source tree.
23 #if defined __UCLIBC__ /* TODO: and glibc? */
24 /* use inlined versions of these: */
25 # define sigfillset(s) __sigfillset(s)
26 # define sigemptyset(s) __sigemptyset(s)
27 # define sigisemptyset(s) __sigisemptyset(s)
35 /* There are two incompatible basename's, let not use them! */
36 /* See the dirname/basename man page for details */
37 #include <libgen.h> /* dirname,basename */
39 #define basename dont_use_basename
41 #include <sys/ioctl.h>
43 #include <sys/socket.h>
46 #include <sys/types.h>
48 # include <sys/sysmacros.h>
53 #include <sys/param.h>
57 #ifdef HAVE_SYS_STATFS_H
58 # include <sys/statfs.h>
60 /* Don't do this here:
61 * #include <sys/sysinfo.h>
62 * Some linux/ includes pull in conflicting definition
63 * of struct sysinfo (only in some toolchanins), which breaks build.
64 * Include sys/sysinfo.h only in those files which need it.
67 # include <selinux/selinux.h>
68 # include <selinux/context.h>
69 # include <selinux/flask.h>
70 # include <selinux/av_permissions.h>
72 #if ENABLE_FEATURE_UTMP
75 #if ENABLE_LOCALE_SUPPORT
78 # define setlocale(x,y) ((void)0)
85 #if ENABLE_FEATURE_SHADOWPASSWDS
86 # if !ENABLE_USE_BB_SHADOW
87 /* If using busybox's shadow implementation, do not include the shadow.h
88 * header as the toolchain may not provide it at all.
93 /* Just in case libc doesn't define some of these... */
95 #define _PATH_PASSWD "/etc/passwd"
98 #define _PATH_GROUP "/etc/group"
101 #define _PATH_SHADOW "/etc/shadow"
103 #ifndef _PATH_GSHADOW
104 #define _PATH_GSHADOW "/etc/gshadow"
106 #if defined __FreeBSD__ || defined __OpenBSD__
107 # include <netinet/in.h>
108 # include <arpa/inet.h>
109 #elif defined __APPLE__
110 # include <netinet/in.h>
112 # include <arpa/inet.h>
113 # if !defined(__socklen_t_defined) && !defined(_SOCKLEN_T_DECLARED)
114 /* We #define socklen_t *after* includes, otherwise we get
115 * typedef redefinition errors from system headers
116 * (in case "is it defined already" detection above failed)
118 # define socklen_t bb_socklen_t
119 typedef unsigned socklen_t;
122 #ifndef HAVE_CLEARENV
123 # define clearenv() do { if (environ) environ[0] = NULL; } while (0)
125 #ifndef HAVE_FDATASYNC
126 # define fdatasync fsync
133 /* Some libc's forget to declare these, do it ourself */
135 extern char **environ;
136 #if defined(__GLIBC__) && __GLIBC__ < 2
137 int vdprintf(int d, const char *format, va_list ap);
139 /* klogctl is in libc's klog.h, but we cheat and not #include that */
140 int klogctl(int type, char *b, int len);
142 # define PATH_MAX 256
149 /* Busybox does not use threads, we can speed up stdio. */
150 #ifdef HAVE_UNLOCKED_STDIO
152 # define getc(stream) getc_unlocked(stream)
154 # define getchar() getchar_unlocked()
156 # define putc(c, stream) putc_unlocked(c, stream)
158 # define putchar(c) putchar_unlocked(c)
160 # define fgetc(stream) getc_unlocked(stream)
162 # define fputc(c, stream) putc_unlocked(c, stream)
164 /* Above functions are required by POSIX.1-2008, below ones are extensions */
165 #ifdef HAVE_UNLOCKED_LINE_OPS
167 # define fgets(s, n, stream) fgets_unlocked(s, n, stream)
169 # define fputs(s, stream) fputs_unlocked(s, stream)
173 /* Make all declarations hidden (-fvisibility flag only affects definitions) */
174 /* (don't include system headers after this until corresponding pop!) */
175 PUSH_AND_SET_FUNCTION_VISIBILITY_TO_HIDDEN
178 #if ENABLE_USE_BB_PWD_GRP
182 #if ENABLE_FEATURE_SHADOWPASSWDS
183 # if ENABLE_USE_BB_SHADOW
184 # include "shadow_.h"
188 /* Tested to work correctly with all int types (IIRC :]) */
189 #define MAXINT(T) (T)( \
192 : (T)~((T)1 << (sizeof(T)*8-1)) \
195 #define MININT(T) (T)( \
198 : ((T)1 << (sizeof(T)*8-1)) \
201 /* Large file support */
202 /* Note that CONFIG_LFS=y forces bbox to be built with all common ops
203 * (stat, lseek etc) mapped to "largefile" variants by libc.
204 * Practically it means that open() automatically has O_LARGEFILE added
205 * and all filesize/file_offset parameters and struct members are "large"
206 * (in today's world - signed 64bit). For full support of large files,
207 * we need a few helper #defines (below) and careful use of off_t
208 * instead of int/ssize_t. No lseek64(), O_LARGEFILE etc necessary */
210 /* CONFIG_LFS is on */
211 # if ULONG_MAX > 0xffffffff
212 /* "long" is long enough on this system */
213 typedef unsigned long uoff_t;
214 # define XATOOFF(a) xatoul_range((a), 0, LONG_MAX)
215 /* usage: sz = BB_STRTOOFF(s, NULL, 10); if (errno || sz < 0) die(); */
216 # define BB_STRTOOFF bb_strtoul
217 # define STRTOOFF strtoul
218 /* usage: printf("size: %"OFF_FMT"d (%"OFF_FMT"x)\n", sz, sz); */
221 /* "long" is too short, need "long long" */
222 typedef unsigned long long uoff_t;
223 # define XATOOFF(a) xatoull_range((a), 0, LLONG_MAX)
224 # define BB_STRTOOFF bb_strtoull
225 # define STRTOOFF strtoull
226 # define OFF_FMT "ll"
229 /* CONFIG_LFS is off */
230 # if UINT_MAX == 0xffffffff
231 /* While sizeof(off_t) == sizeof(int), off_t is typedef'ed to long anyway.
232 * gcc will throw warnings on printf("%d", off_t). Crap... */
233 typedef unsigned long uoff_t;
234 # define XATOOFF(a) xatoi_positive(a)
235 # define BB_STRTOOFF bb_strtou
236 # define STRTOOFF strtol
239 typedef unsigned long uoff_t;
240 # define XATOOFF(a) xatoul_range((a), 0, LONG_MAX)
241 # define BB_STRTOOFF bb_strtoul
242 # define STRTOOFF strtol
246 /* scary. better ideas? (but do *test* them first!) */
247 #define OFF_T_MAX ((off_t)~((off_t)1 << (sizeof(off_t)*8-1)))
248 /* Users report bionic to use 32-bit off_t even if LARGEFILE support is requested.
249 * We misdetected that. Don't let it build:
251 struct BUG_off_t_size_is_misdetected {
252 char BUG_off_t_size_is_misdetected[sizeof(off_t) == sizeof(uoff_t) ? 1 : -1];
255 /* Some useful definitions */
257 #define FALSE ((int) 0)
259 #define TRUE ((int) 1)
261 #define SKIP ((int) 2)
263 /* Macros for min/max. */
265 #define MIN(a,b) (((a)<(b))?(a):(b))
269 #define MAX(a,b) (((a)>(b))?(a):(b))
272 /* buffer allocation schemes */
273 #if ENABLE_FEATURE_BUFFERS_GO_ON_STACK
274 #define RESERVE_CONFIG_BUFFER(buffer,len) char buffer[len]
275 #define RESERVE_CONFIG_UBUFFER(buffer,len) unsigned char buffer[len]
276 #define RELEASE_CONFIG_BUFFER(buffer) ((void)0)
278 #if ENABLE_FEATURE_BUFFERS_GO_IN_BSS
279 #define RESERVE_CONFIG_BUFFER(buffer,len) static char buffer[len]
280 #define RESERVE_CONFIG_UBUFFER(buffer,len) static unsigned char buffer[len]
281 #define RELEASE_CONFIG_BUFFER(buffer) ((void)0)
283 #define RESERVE_CONFIG_BUFFER(buffer,len) char *buffer = xmalloc(len)
284 #define RESERVE_CONFIG_UBUFFER(buffer,len) unsigned char *buffer = xmalloc(len)
285 #define RELEASE_CONFIG_BUFFER(buffer) free(buffer)
289 #if defined(__GLIBC__)
290 /* glibc uses __errno_location() to get a ptr to errno */
291 /* We can just memorize it once - no multithreading in busybox :) */
292 extern int *const bb_errno;
294 #define errno (*bb_errno)
297 #if !(ULONG_MAX > 0xffffffff)
298 /* Only 32-bit CPUs need this, 64-bit ones use inlined version */
299 uint64_t bb_bswap_64(uint64_t x) FAST_FUNC;
302 unsigned long long monotonic_ns(void) FAST_FUNC;
303 unsigned long long monotonic_us(void) FAST_FUNC;
304 unsigned long long monotonic_ms(void) FAST_FUNC;
305 unsigned monotonic_sec(void) FAST_FUNC;
307 extern void chomp(char *s) FAST_FUNC;
308 extern void trim(char *s) FAST_FUNC;
309 extern char *skip_whitespace(const char *) FAST_FUNC;
310 extern char *skip_non_whitespace(const char *) FAST_FUNC;
311 extern char *skip_dev_pfx(const char *tty_name) FAST_FUNC;
313 extern char *strrstr(const char *haystack, const char *needle) FAST_FUNC;
315 //TODO: supply a pointer to char[11] buffer (avoid statics)?
316 extern const char *bb_mode_string(mode_t mode) FAST_FUNC;
317 extern int is_directory(const char *name, int followLinks, struct stat *statBuf) FAST_FUNC;
318 enum { /* DO NOT CHANGE THESE VALUES! cp.c, mv.c, install.c depend on them. */
319 FILEUTILS_PRESERVE_STATUS = 1 << 0, /* -p */
320 FILEUTILS_DEREFERENCE = 1 << 1, /* !-d */
321 FILEUTILS_RECUR = 1 << 2, /* -R */
322 FILEUTILS_FORCE = 1 << 3, /* -f */
323 FILEUTILS_INTERACTIVE = 1 << 4, /* -i */
324 FILEUTILS_MAKE_HARDLINK = 1 << 5, /* -l */
325 FILEUTILS_MAKE_SOFTLINK = 1 << 6, /* -s */
326 FILEUTILS_DEREF_SOFTLINK = 1 << 7, /* -L */
327 FILEUTILS_DEREFERENCE_L0 = 1 << 8, /* -H */
329 FILEUTILS_PRESERVE_SECURITY_CONTEXT = 1 << 9, /* -c */
330 FILEUTILS_SET_SECURITY_CONTEXT = 1 << 10,
333 #define FILEUTILS_CP_OPTSTR "pdRfilsLH" IF_SELINUX("c")
334 extern int remove_file(const char *path, int flags) FAST_FUNC;
335 /* NB: without FILEUTILS_RECUR in flags, it will basically "cat"
336 * the source, not copy (unless "source" is a directory).
337 * This makes "cp /dev/null file" and "install /dev/null file" (!!!)
338 * work coreutils-compatibly. */
339 extern int copy_file(const char *source, const char *dest, int flags) FAST_FUNC;
342 ACTION_RECURSE = (1 << 0),
343 ACTION_FOLLOWLINKS = (1 << 1),
344 ACTION_FOLLOWLINKS_L0 = (1 << 2),
345 ACTION_DEPTHFIRST = (1 << 3),
346 /*ACTION_REVERSE = (1 << 4), - unused */
347 ACTION_QUIET = (1 << 5),
348 ACTION_DANGLING_OK = (1 << 6),
350 typedef uint8_t recurse_flags_t;
351 extern int recursive_action(const char *fileName, unsigned flags,
352 int FAST_FUNC (*fileAction)(const char *fileName, struct stat* statbuf, void* userData, int depth),
353 int FAST_FUNC (*dirAction)(const char *fileName, struct stat* statbuf, void* userData, int depth),
354 void* userData, unsigned depth) FAST_FUNC;
355 extern int device_open(const char *device, int mode) FAST_FUNC;
356 enum { GETPTY_BUFSIZE = 16 }; /* more than enough for "/dev/ttyXXX" */
357 extern int xgetpty(char *line) FAST_FUNC;
358 extern int get_console_fd_or_die(void) FAST_FUNC;
359 extern void console_make_active(int fd, const int vt_num) FAST_FUNC;
360 extern char *find_block_device(const char *path) FAST_FUNC;
361 /* bb_copyfd_XX print read/write errors and return -1 if they occur */
362 extern off_t bb_copyfd_eof(int fd1, int fd2) FAST_FUNC;
363 extern off_t bb_copyfd_size(int fd1, int fd2, off_t size) FAST_FUNC;
364 extern void bb_copyfd_exact_size(int fd1, int fd2, off_t size) FAST_FUNC;
365 /* "short" copy can be detected by return value < size */
366 /* this helper yells "short read!" if param is not -1 */
367 extern void complain_copyfd_and_die(off_t sz) NORETURN FAST_FUNC;
369 extern char bb_process_escape_sequence(const char **ptr) FAST_FUNC;
370 char* strcpy_and_process_escape_sequences(char *dst, const char *src) FAST_FUNC;
371 /* xxxx_strip version can modify its parameter:
375 * "abc/def/" -> "def" !!
377 char *bb_get_last_path_component_strip(char *path) FAST_FUNC;
378 /* "abc/def/" -> "" and it never modifies 'path' */
379 char *bb_get_last_path_component_nostrip(const char *path) FAST_FUNC;
380 /* Simpler version: does not special case "/" string */
381 const char *bb_basename(const char *name) FAST_FUNC;
382 /* NB: can violate const-ness (similarly to strchr) */
383 char *last_char_is(const char *s, int c) FAST_FUNC;
385 void ndelay_on(int fd) FAST_FUNC;
386 void ndelay_off(int fd) FAST_FUNC;
387 void close_on_exec_on(int fd) FAST_FUNC;
388 void xdup2(int, int) FAST_FUNC;
389 void xmove_fd(int, int) FAST_FUNC;
392 DIR *xopendir(const char *path) FAST_FUNC;
393 DIR *warn_opendir(const char *path) FAST_FUNC;
395 char *xmalloc_realpath(const char *path) FAST_FUNC RETURNS_MALLOC;
396 char *xmalloc_readlink(const char *path) FAST_FUNC RETURNS_MALLOC;
397 char *xmalloc_readlink_or_warn(const char *path) FAST_FUNC RETURNS_MALLOC;
398 /* !RETURNS_MALLOC: it's a realloc-like function */
399 char *xrealloc_getcwd_or_warn(char *cwd) FAST_FUNC;
401 char *xmalloc_follow_symlinks(const char *path) FAST_FUNC RETURNS_MALLOC;
405 /* bb_signals(BB_FATAL_SIGS, handler) catches all signals which
406 * otherwise would kill us, except for those resulting from bugs:
407 * SIGSEGV, SIGILL, SIGFPE.
408 * Other fatal signals not included (TODO?):
409 * SIGBUS Bus error (bad memory access)
410 * SIGPOLL Pollable event. Synonym of SIGIO
411 * SIGPROF Profiling timer expired
412 * SIGSYS Bad argument to routine
413 * SIGTRAP Trace/breakpoint trap
415 * The only known arch with some of these sigs not fitting
416 * into 32 bits is parisc (SIGXCPU=33, SIGXFSZ=34, SIGSTKFLT=36).
417 * Dance around with long long to guard against that...
419 BB_FATAL_SIGS = (int)(0
423 + (1LL << SIGPIPE) // Write to pipe with no readers
424 + (1LL << SIGQUIT) // Quit from keyboard
425 + (1LL << SIGABRT) // Abort signal from abort(3)
426 + (1LL << SIGALRM) // Timer signal from alarm(2)
427 + (1LL << SIGVTALRM) // Virtual alarm clock
428 + (1LL << SIGXCPU) // CPU time limit exceeded
429 + (1LL << SIGXFSZ) // File size limit exceeded
430 + (1LL << SIGUSR1) // Yes kids, these are also fatal!
434 void bb_signals(int sigs, void (*f)(int)) FAST_FUNC;
435 /* Unlike signal() and bb_signals, sets handler with sigaction()
436 * and in a way that while signal handler is run, no other signals
437 * will be blocked; syscalls will not be restarted: */
438 void bb_signals_recursive_norestart(int sigs, void (*f)(int)) FAST_FUNC;
439 /* syscalls like read() will be interrupted with EINTR: */
440 void signal_no_SA_RESTART_empty_mask(int sig, void (*handler)(int)) FAST_FUNC;
441 /* syscalls like read() won't be interrupted (though select/poll will be): */
442 void signal_SA_RESTART_empty_mask(int sig, void (*handler)(int)) FAST_FUNC;
443 void wait_for_any_sig(void) FAST_FUNC;
444 void kill_myself_with_sig(int sig) NORETURN FAST_FUNC;
445 void sig_block(int sig) FAST_FUNC;
446 void sig_unblock(int sig) FAST_FUNC;
447 /* Will do sigaction(signum, act, NULL): */
448 int sigaction_set(int sig, const struct sigaction *act) FAST_FUNC;
449 /* SIG_BLOCK/SIG_UNBLOCK all signals: */
450 int sigprocmask_allsigs(int how) FAST_FUNC;
451 /* Standard handler which just records signo */
452 extern smallint bb_got_signal;
453 void record_signo(int signo); /* not FAST_FUNC! */
456 void xsetgid(gid_t gid) FAST_FUNC;
457 void xsetuid(uid_t uid) FAST_FUNC;
458 void xchdir(const char *path) FAST_FUNC;
459 void xchroot(const char *path) FAST_FUNC;
460 void xsetenv(const char *key, const char *value) FAST_FUNC;
461 void bb_unsetenv(const char *key) FAST_FUNC;
462 void bb_unsetenv_and_free(char *key) FAST_FUNC;
463 void xunlink(const char *pathname) FAST_FUNC;
464 void xstat(const char *pathname, struct stat *buf) FAST_FUNC;
465 void xfstat(int fd, struct stat *buf, const char *errmsg) FAST_FUNC;
466 int xopen(const char *pathname, int flags) FAST_FUNC;
467 int xopen_nonblocking(const char *pathname) FAST_FUNC;
468 int xopen3(const char *pathname, int flags, int mode) FAST_FUNC;
469 int open_or_warn(const char *pathname, int flags) FAST_FUNC;
470 int open3_or_warn(const char *pathname, int flags, int mode) FAST_FUNC;
471 int open_or_warn_stdin(const char *pathname) FAST_FUNC;
472 int xopen_stdin(const char *pathname) FAST_FUNC;
473 void xrename(const char *oldpath, const char *newpath) FAST_FUNC;
474 int rename_or_warn(const char *oldpath, const char *newpath) FAST_FUNC;
475 off_t xlseek(int fd, off_t offset, int whence) FAST_FUNC;
476 int xmkstemp(char *template) FAST_FUNC;
477 off_t fdlength(int fd) FAST_FUNC;
479 uoff_t FAST_FUNC get_volume_size_in_bytes(int fd,
480 const char *override,
481 unsigned override_units,
484 void xpipe(int filedes[2]) FAST_FUNC;
485 /* In this form code with pipes is much more readable */
486 struct fd_pair { int rd; int wr; };
487 #define piped_pair(pair) pipe(&((pair).rd))
488 #define xpiped_pair(pair) xpipe(&((pair).rd))
490 /* Useful for having small structure members/global variables */
491 typedef int8_t socktype_t;
492 typedef int8_t family_t;
493 struct BUG_too_small {
494 char BUG_socktype_t_too_small[(0
501 char BUG_family_t_too_small[(0
518 void parse_datestr(const char *date_str, struct tm *ptm) FAST_FUNC;
519 time_t validate_tm_time(const char *date_str, struct tm *ptm) FAST_FUNC;
522 int xsocket(int domain, int type, int protocol) FAST_FUNC;
523 void xbind(int sockfd, struct sockaddr *my_addr, socklen_t addrlen) FAST_FUNC;
524 void xlisten(int s, int backlog) FAST_FUNC;
525 void xconnect(int s, const struct sockaddr *s_addr, socklen_t addrlen) FAST_FUNC;
526 ssize_t xsendto(int s, const void *buf, size_t len, const struct sockaddr *to,
527 socklen_t tolen) FAST_FUNC;
528 /* SO_REUSEADDR allows a server to rebind to an address that is already
529 * "in use" by old connections to e.g. previous server instance which is
530 * killed or crashed. Without it bind will fail until all such connections
531 * time out. Linux does not allow multiple live binds on same ip:port
532 * regardless of SO_REUSEADDR (unlike some other flavors of Unix).
533 * Turn it on before you call bind(). */
534 void setsockopt_reuseaddr(int fd) FAST_FUNC; /* On Linux this never fails. */
535 int setsockopt_broadcast(int fd) FAST_FUNC;
536 int setsockopt_bindtodevice(int fd, const char *iface) FAST_FUNC;
537 /* NB: returns port in host byte order */
538 unsigned bb_lookup_port(const char *port, const char *protocol, unsigned default_port) FAST_FUNC;
539 typedef struct len_and_sockaddr {
543 struct sockaddr_in sin;
544 #if ENABLE_FEATURE_IPV6
545 struct sockaddr_in6 sin6;
550 LSA_LEN_SIZE = offsetof(len_and_sockaddr, u),
551 LSA_SIZEOF_SA = sizeof(
554 struct sockaddr_in sin;
555 #if ENABLE_FEATURE_IPV6
556 struct sockaddr_in6 sin6;
561 /* Create stream socket, and allocate suitable lsa.
562 * (lsa of correct size and lsa->sa.sa_family (AF_INET/AF_INET6))
563 * af == AF_UNSPEC will result in trying to create IPv6 socket,
564 * and if kernel doesn't support it, fall back to IPv4.
565 * This is useful if you plan to bind to resulting local lsa.
567 #if ENABLE_FEATURE_IPV6
568 int xsocket_type(len_and_sockaddr **lsap, int af, int sock_type) FAST_FUNC;
570 int xsocket_type(len_and_sockaddr **lsap, int sock_type) FAST_FUNC;
571 #define xsocket_type(lsap, af, sock_type) xsocket_type((lsap), (sock_type))
573 int xsocket_stream(len_and_sockaddr **lsap) FAST_FUNC;
574 /* Create server socket bound to bindaddr:port. bindaddr can be NULL,
575 * numeric IP ("N.N.N.N") or numeric IPv6 address,
576 * and can have ":PORT" suffix (for IPv6 use "[X:X:...:X]:PORT").
577 * Only if there is no suffix, port argument is used */
578 /* NB: these set SO_REUSEADDR before bind */
579 int create_and_bind_stream_or_die(const char *bindaddr, int port) FAST_FUNC;
580 int create_and_bind_dgram_or_die(const char *bindaddr, int port) FAST_FUNC;
581 /* Create client TCP socket connected to peer:port. Peer cannot be NULL.
582 * Peer can be numeric IP ("N.N.N.N"), numeric IPv6 address or hostname,
583 * and can have ":PORT" suffix (for IPv6 use "[X:X:...:X]:PORT").
584 * If there is no suffix, port argument is used */
585 int create_and_connect_stream_or_die(const char *peer, int port) FAST_FUNC;
586 /* Connect to peer identified by lsa */
587 int xconnect_stream(const len_and_sockaddr *lsa) FAST_FUNC;
588 /* Get local address of bound or accepted socket */
589 len_and_sockaddr *get_sock_lsa(int fd) FAST_FUNC RETURNS_MALLOC;
590 /* Get remote address of connected or accepted socket */
591 len_and_sockaddr *get_peer_lsa(int fd) FAST_FUNC RETURNS_MALLOC;
592 /* Return malloc'ed len_and_sockaddr with socket address of host:port
593 * Currently will return IPv4 or IPv6 sockaddrs only
594 * (depending on host), but in theory nothing prevents e.g.
595 * UNIX socket address being returned, IPX sockaddr etc...
596 * On error does bb_error_msg and returns NULL */
597 len_and_sockaddr* host2sockaddr(const char *host, int port) FAST_FUNC RETURNS_MALLOC;
598 /* Version which dies on error */
599 len_and_sockaddr* xhost2sockaddr(const char *host, int port) FAST_FUNC RETURNS_MALLOC;
600 len_and_sockaddr* xdotted2sockaddr(const char *host, int port) FAST_FUNC RETURNS_MALLOC;
601 /* Same, useful if you want to force family (e.g. IPv6) */
602 #if !ENABLE_FEATURE_IPV6
603 #define host_and_af2sockaddr(host, port, af) host2sockaddr((host), (port))
604 #define xhost_and_af2sockaddr(host, port, af) xhost2sockaddr((host), (port))
606 len_and_sockaddr* host_and_af2sockaddr(const char *host, int port, sa_family_t af) FAST_FUNC RETURNS_MALLOC;
607 len_and_sockaddr* xhost_and_af2sockaddr(const char *host, int port, sa_family_t af) FAST_FUNC RETURNS_MALLOC;
609 /* Assign sin[6]_port member if the socket is an AF_INET[6] one,
610 * otherwise no-op. Useful for ftp.
611 * NB: does NOT do htons() internally, just direct assignment. */
612 void set_nport(struct sockaddr *sa, unsigned port) FAST_FUNC;
613 /* Retrieve sin[6]_port or return -1 for non-INET[6] lsa's */
614 int get_nport(const struct sockaddr *sa) FAST_FUNC;
615 /* Reverse DNS. Returns NULL on failure. */
616 char* xmalloc_sockaddr2host(const struct sockaddr *sa) FAST_FUNC RETURNS_MALLOC;
617 /* This one doesn't append :PORTNUM */
618 char* xmalloc_sockaddr2host_noport(const struct sockaddr *sa) FAST_FUNC RETURNS_MALLOC;
619 /* This one also doesn't fall back to dotted IP (returns NULL) */
620 char* xmalloc_sockaddr2hostonly_noport(const struct sockaddr *sa) FAST_FUNC RETURNS_MALLOC;
621 /* inet_[ap]ton on steroids */
622 char* xmalloc_sockaddr2dotted(const struct sockaddr *sa) FAST_FUNC RETURNS_MALLOC;
623 char* xmalloc_sockaddr2dotted_noport(const struct sockaddr *sa) FAST_FUNC RETURNS_MALLOC;
624 // "old" (ipv4 only) API
625 // users: traceroute.c hostname.c - use _list_ of all IPs
626 struct hostent *xgethostbyname(const char *name) FAST_FUNC;
627 // Also mount.c and inetd.c are using gethostbyname(),
628 // + inet_common.c has additional IPv4-only stuff
631 void socket_want_pktinfo(int fd) FAST_FUNC;
632 ssize_t send_to_from(int fd, void *buf, size_t len, int flags,
633 const struct sockaddr *to,
634 const struct sockaddr *from,
635 socklen_t tolen) FAST_FUNC;
636 ssize_t recv_from_to(int fd, void *buf, size_t len, int flags,
637 struct sockaddr *from,
639 socklen_t sa_size) FAST_FUNC;
641 uint16_t inet_cksum(uint16_t *addr, int len) FAST_FUNC;
643 char *xstrdup(const char *s) FAST_FUNC RETURNS_MALLOC;
644 char *xstrndup(const char *s, int n) FAST_FUNC RETURNS_MALLOC;
645 void overlapping_strcpy(char *dst, const char *src) FAST_FUNC;
646 char *safe_strncpy(char *dst, const char *src, size_t size) FAST_FUNC;
647 char *strncpy_IFNAMSIZ(char *dst, const char *src) FAST_FUNC;
648 /* Guaranteed to NOT be a macro (smallest code). Saves nearly 2k on uclibc.
649 * But potentially slow, don't use in one-billion-times loops */
650 int bb_putchar(int ch) FAST_FUNC;
651 /* Note: does not use stdio, writes to fd 2 directly */
652 int bb_putchar_stderr(char ch) FAST_FUNC;
653 char *xasprintf(const char *format, ...) __attribute__ ((format(printf, 1, 2))) FAST_FUNC RETURNS_MALLOC;
654 // gcc-4.1.1 still isn't good enough at optimizing it
655 // (+200 bytes compared to macro)
656 //static ALWAYS_INLINE
657 //int LONE_DASH(const char *s) { return s[0] == '-' && !s[1]; }
658 //static ALWAYS_INLINE
659 //int NOT_LONE_DASH(const char *s) { return s[0] != '-' || s[1]; }
660 #define LONE_DASH(s) ((s)[0] == '-' && !(s)[1])
661 #define NOT_LONE_DASH(s) ((s)[0] != '-' || (s)[1])
662 #define LONE_CHAR(s,c) ((s)[0] == (c) && !(s)[1])
663 #define NOT_LONE_CHAR(s,c) ((s)[0] != (c) || (s)[1])
664 #define DOT_OR_DOTDOT(s) ((s)[0] == '.' && (!(s)[1] || ((s)[1] == '.' && !(s)[2])))
666 typedef struct uni_stat_t {
668 unsigned unicode_count;
669 unsigned unicode_width;
671 /* Returns a string with unprintable chars replaced by '?' or
672 * SUBST_WCHAR. This function is unicode-aware. */
673 const char* FAST_FUNC printable_string(uni_stat_t *stats, const char *str);
674 /* Prints unprintable char ch as ^C or M-c to file
675 * (M-c is used only if ch is ORed with PRINTABLE_META),
676 * else it is printed as-is (except for ch = 0x9b) */
677 enum { PRINTABLE_META = 0x100 };
678 void fputc_printable(int ch, FILE *file) FAST_FUNC;
680 /* dmalloc will redefine these to it's own implementation. It is safe
681 * to have the prototypes here unconditionally. */
682 void *malloc_or_warn(size_t size) FAST_FUNC RETURNS_MALLOC;
683 void *xmalloc(size_t size) FAST_FUNC RETURNS_MALLOC;
684 void *xzalloc(size_t size) FAST_FUNC RETURNS_MALLOC;
685 void *xrealloc(void *old, size_t size) FAST_FUNC;
686 /* After v = xrealloc_vector(v, SHIFT, idx) it's ok to use
687 * at least v[idx] and v[idx+1], for all idx values.
688 * SHIFT specifies how many new elements are added (1:2, 2:4, ..., 8:256...)
689 * when all elements are used up. New elements are zeroed out.
690 * xrealloc_vector(v, SHIFT, idx) *MUST* be called with consecutive IDXs -
691 * skipping an index is a bad bug - it may miss a realloc!
693 #define xrealloc_vector(vector, shift, idx) \
694 xrealloc_vector_helper((vector), (sizeof((vector)[0]) << 8) + (shift), (idx))
695 void* xrealloc_vector_helper(void *vector, unsigned sizeof_and_shift, int idx) FAST_FUNC;
698 extern ssize_t safe_read(int fd, void *buf, size_t count) FAST_FUNC;
699 extern ssize_t nonblock_immune_read(int fd, void *buf, size_t count, int loop_on_EINTR) FAST_FUNC;
700 // NB: will return short read on error, not -1,
701 // if some data was read before error occurred
702 extern ssize_t full_read(int fd, void *buf, size_t count) FAST_FUNC;
703 extern void xread(int fd, void *buf, size_t count) FAST_FUNC;
704 extern unsigned char xread_char(int fd) FAST_FUNC;
705 extern ssize_t read_close(int fd, void *buf, size_t maxsz) FAST_FUNC;
706 extern ssize_t open_read_close(const char *filename, void *buf, size_t maxsz) FAST_FUNC;
707 // Reads one line a-la fgets (but doesn't save terminating '\n').
708 // Reads byte-by-byte. Useful when it is important to not read ahead.
709 // Bytes are appended to pfx (which must be malloced, or NULL).
710 extern char *xmalloc_reads(int fd, size_t *maxsz_p) FAST_FUNC;
711 /* Reads block up to *maxsz_p (default: INT_MAX - 4095) */
712 extern void *xmalloc_read(int fd, size_t *maxsz_p) FAST_FUNC RETURNS_MALLOC;
713 /* Returns NULL if file can't be opened (default max size: INT_MAX - 4095) */
714 extern void *xmalloc_open_read_close(const char *filename, size_t *maxsz_p) FAST_FUNC RETURNS_MALLOC;
715 /* Never returns NULL */
716 extern void *xmalloc_xopen_read_close(const char *filename, size_t *maxsz_p) FAST_FUNC RETURNS_MALLOC;
717 /* Autodetects gzip/bzip2 formats. fd may be in the middle of the file! */
718 #if ENABLE_FEATURE_SEAMLESS_LZMA \
719 || ENABLE_FEATURE_SEAMLESS_BZ2 \
720 || ENABLE_FEATURE_SEAMLESS_GZ \
721 /* || ENABLE_FEATURE_SEAMLESS_Z */
722 extern void setup_unzip_on_fd(int fd /*, int fail_if_not_detected*/) FAST_FUNC;
724 # define setup_unzip_on_fd(...) ((void)0)
726 /* Autodetects .gz etc */
727 extern int open_zipped(const char *fname) FAST_FUNC;
728 extern void *xmalloc_open_zipped_read_close(const char *fname, size_t *maxsz_p) FAST_FUNC RETURNS_MALLOC;
730 extern ssize_t safe_write(int fd, const void *buf, size_t count) FAST_FUNC;
731 // NB: will return short write on error, not -1,
732 // if some data was written before error occurred
733 extern ssize_t full_write(int fd, const void *buf, size_t count) FAST_FUNC;
734 extern void xwrite(int fd, const void *buf, size_t count) FAST_FUNC;
735 extern void xwrite_str(int fd, const char *str) FAST_FUNC;
736 extern ssize_t full_write1_str(const char *str) FAST_FUNC;
737 extern ssize_t full_write2_str(const char *str) FAST_FUNC;
738 extern void xopen_xwrite_close(const char* file, const char *str) FAST_FUNC;
740 /* Close fd, but check for failures (some types of write errors) */
741 extern void xclose(int fd) FAST_FUNC;
743 /* Reads and prints to stdout till eof, then closes FILE. Exits on error: */
744 extern void xprint_and_close_file(FILE *file) FAST_FUNC;
746 /* Reads a line from a text file, up to a newline or NUL byte, inclusive.
747 * Returns malloc'ed char*. If end is NULL '\n' isn't considered
748 * end of line. If end isn't NULL, length of the chunk is stored in it.
749 * Returns NULL if EOF/error.
751 extern char *bb_get_chunk_from_file(FILE *file, int *end) FAST_FUNC;
752 /* Reads up to (and including) TERMINATING_STRING: */
753 extern char *xmalloc_fgets_str(FILE *file, const char *terminating_string) FAST_FUNC RETURNS_MALLOC;
754 /* Same, with limited max size, and returns the length (excluding NUL): */
755 extern char *xmalloc_fgets_str_len(FILE *file, const char *terminating_string, size_t *maxsz_p) FAST_FUNC RETURNS_MALLOC;
756 /* Chops off TERMINATING_STRING from the end: */
757 extern char *xmalloc_fgetline_str(FILE *file, const char *terminating_string) FAST_FUNC RETURNS_MALLOC;
758 /* Reads up to (and including) "\n" or NUL byte: */
759 extern char *xmalloc_fgets(FILE *file) FAST_FUNC RETURNS_MALLOC;
760 /* Chops off '\n' from the end, unlike fgets: */
761 extern char *xmalloc_fgetline(FILE *file) FAST_FUNC RETURNS_MALLOC;
762 /* Same, but doesn't try to conserve space (may have some slack after the end) */
763 /* extern char *xmalloc_fgetline_fast(FILE *file) FAST_FUNC RETURNS_MALLOC; */
765 void die_if_ferror(FILE *file, const char *msg) FAST_FUNC;
766 void die_if_ferror_stdout(void) FAST_FUNC;
767 int fflush_all(void) FAST_FUNC;
768 void fflush_stdout_and_exit(int retval) NORETURN FAST_FUNC;
769 int fclose_if_not_stdin(FILE *file) FAST_FUNC;
770 FILE* xfopen(const char *filename, const char *mode) FAST_FUNC;
771 /* Prints warning to stderr and returns NULL on failure: */
772 FILE* fopen_or_warn(const char *filename, const char *mode) FAST_FUNC;
773 /* "Opens" stdin if filename is special, else just opens file: */
774 FILE* xfopen_stdin(const char *filename) FAST_FUNC;
775 FILE* fopen_or_warn_stdin(const char *filename) FAST_FUNC;
776 FILE* fopen_for_read(const char *path) FAST_FUNC;
777 FILE* xfopen_for_read(const char *path) FAST_FUNC;
778 FILE* fopen_for_write(const char *path) FAST_FUNC;
779 FILE* xfopen_for_write(const char *path) FAST_FUNC;
780 FILE* xfdopen_for_read(int fd) FAST_FUNC;
781 FILE* xfdopen_for_write(int fd) FAST_FUNC;
783 int bb_pstrcmp(const void *a, const void *b) /* not FAST_FUNC! */;
784 void qsort_string_vector(char **sv, unsigned count) FAST_FUNC;
786 /* Wrapper which restarts poll on EINTR or ENOMEM.
787 * On other errors complains [perror("poll")] and returns.
788 * Warning! May take (much) longer than timeout_ms to return!
789 * If this is a problem, use bare poll and open-code EINTR/ENOMEM handling */
790 int safe_poll(struct pollfd *ufds, nfds_t nfds, int timeout_ms) FAST_FUNC;
792 char *safe_gethostname(void) FAST_FUNC;
793 char *safe_getdomainname(void) FAST_FUNC;
795 /* Convert each alpha char in str to lower-case */
796 char* str_tolower(char *str) FAST_FUNC;
798 char *utoa(unsigned n) FAST_FUNC;
799 char *itoa(int n) FAST_FUNC;
800 /* Returns a pointer past the formatted number, does NOT null-terminate */
801 char *utoa_to_buf(unsigned n, char *buf, unsigned buflen) FAST_FUNC;
802 char *itoa_to_buf(int n, char *buf, unsigned buflen) FAST_FUNC;
803 /* Intelligent formatters of bignums */
804 void smart_ulltoa4(unsigned long long ul, char buf[4], const char *scale) FAST_FUNC;
805 void smart_ulltoa5(unsigned long long ul, char buf[5], const char *scale) FAST_FUNC;
806 /* If block_size == 0, display size without fractional part,
807 * else display (size * block_size) with one decimal digit.
808 * If display_unit == 0, show value no bigger than 1024 with suffix (K,M,G...),
809 * else divide by display_unit and do not use suffix. */
810 #define HUMAN_READABLE_MAX_WIDTH 7 /* "1024.0G" */
811 #define HUMAN_READABLE_MAX_WIDTH_STR "7"
812 //TODO: provide pointer to buf (avoid statics)?
813 const char *make_human_readable_str(unsigned long long size,
814 unsigned long block_size, unsigned long display_unit) FAST_FUNC;
815 /* Put a string of hex bytes ("1b2e66fe"...), return advanced pointer */
816 char *bin2hex(char *dst, const char *src, int count) FAST_FUNC;
818 char* hex2bin(char *dst, const char *src, int count) FAST_FUNC;
820 /* Generate a UUID */
821 void generate_uuid(uint8_t *buf) FAST_FUNC;
823 /* Last element is marked by mult == 0 */
831 /* Using xatoi() instead of naive atoi() is not always convenient -
832 * in many places people want *non-negative* values, but store them
833 * in signed int. Therefore we need this one:
834 * dies if input is not in [0, INT_MAX] range. Also will reject '-0' etc.
835 * It should really be named xatoi_nonnegative (since it allows 0),
836 * but that would be too long.
838 int xatoi_positive(const char *numstr) FAST_FUNC;
840 /* Useful for reading port numbers */
841 uint16_t xatou16(const char *numstr) FAST_FUNC;
844 /* These parse entries in /etc/passwd and /etc/group. This is desirable
845 * for BusyBox since we want to avoid using the glibc NSS stuff, which
846 * increases target size and is often not needed on embedded systems. */
847 long xuname2uid(const char *name) FAST_FUNC;
848 long xgroup2gid(const char *name) FAST_FUNC;
849 /* wrapper: allows string to contain numeric uid or gid */
850 unsigned long get_ug_id(const char *s, long FAST_FUNC (*xname2id)(const char *)) FAST_FUNC;
851 /* from chpst. Does not die, returns 0 on failure */
856 /* always sets uid and gid */
857 int get_uidgid(struct bb_uidgid_t*, const char*, int numeric_ok) FAST_FUNC;
858 /* always sets uid and gid, allows numeric; exits on failure */
859 void xget_uidgid(struct bb_uidgid_t*, const char*) FAST_FUNC;
860 /* chown-like handling of "user[:[group]" */
861 void parse_chown_usergroup_or_die(struct bb_uidgid_t *u, char *user_group) FAST_FUNC;
862 struct passwd* xgetpwnam(const char *name) FAST_FUNC;
863 struct group* xgetgrnam(const char *name) FAST_FUNC;
864 struct passwd* xgetpwuid(uid_t uid) FAST_FUNC;
865 struct group* xgetgrgid(gid_t gid) FAST_FUNC;
866 char* xuid2uname(uid_t uid) FAST_FUNC;
867 char* xgid2group(gid_t gid) FAST_FUNC;
868 char* uid2uname(uid_t uid) FAST_FUNC;
869 char* gid2group(gid_t gid) FAST_FUNC;
870 char* uid2uname_utoa(uid_t uid) FAST_FUNC;
871 char* gid2group_utoa(gid_t gid) FAST_FUNC;
872 /* versions which cache results (useful for ps, ls etc) */
873 const char* get_cached_username(uid_t uid) FAST_FUNC;
874 const char* get_cached_groupname(gid_t gid) FAST_FUNC;
875 void clear_username_cache(void) FAST_FUNC;
876 /* internally usernames are saved in fixed-sized char[] buffers */
877 enum { USERNAME_MAX_SIZE = 32 - sizeof(uid_t) };
878 #if ENABLE_FEATURE_CHECK_NAMES
879 void die_if_bad_username(const char* name) FAST_FUNC;
881 #define die_if_bad_username(name) ((void)(name))
884 #if ENABLE_FEATURE_UTMP
885 void FAST_FUNC write_new_utmp(pid_t pid, int new_type, const char *tty_name, const char *username, const char *hostname);
886 void FAST_FUNC update_utmp(pid_t pid, int new_type, const char *tty_name, const char *username, const char *hostname);
888 # define write_new_utmp(pid, new_type, tty_name, username, hostname) ((void)0)
889 # define update_utmp(pid, new_type, tty_name, username, hostname) ((void)0)
893 int execable_file(const char *name) FAST_FUNC;
894 char *find_execable(const char *filename, char **PATHp) FAST_FUNC;
895 int exists_execable(const char *filename) FAST_FUNC;
897 /* BB_EXECxx always execs (it's not doing NOFORK/NOEXEC stuff),
898 * but it may exec busybox and call applet instead of searching PATH.
900 #if ENABLE_FEATURE_PREFER_APPLETS
901 int BB_EXECVP(const char *file, char *const argv[]) FAST_FUNC;
902 #define BB_EXECLP(prog,cmd,...) \
904 if (find_applet_by_name(prog) >= 0) \
905 execlp(bb_busybox_exec_path, cmd, __VA_ARGS__); \
906 execlp(prog, cmd, __VA_ARGS__); \
909 #define BB_EXECVP(prog,cmd) execvp(prog,cmd)
910 #define BB_EXECLP(prog,cmd,...) execlp(prog,cmd,__VA_ARGS__)
912 int BB_EXECVP_or_die(char **argv) NORETURN FAST_FUNC;
914 /* xvfork() can't be a _function_, return after vfork mangles stack
915 * in the parent. It must be a macro. */
918 pid_t bb__xvfork_pid = vfork(); \
919 if (bb__xvfork_pid < 0) \
920 bb_perror_msg_and_die("vfork"); \
924 pid_t xfork(void) FAST_FUNC;
927 /* NOMMU friendy fork+exec: */
928 pid_t spawn(char **argv) FAST_FUNC;
929 pid_t xspawn(char **argv) FAST_FUNC;
931 pid_t safe_waitpid(pid_t pid, int *wstat, int options) FAST_FUNC;
932 pid_t wait_any_nohang(int *wstat) FAST_FUNC;
933 /* wait4pid: unlike waitpid, waits ONLY for one process.
934 * Returns sig + 0x180 if child is killed by signal.
935 * It's safe to pass negative 'pids' from failed [v]fork -
936 * wait4pid will return -1 (and will not clobber [v]fork's errno).
937 * IOW: rc = wait4pid(spawn(argv));
938 * if (rc < 0) bb_perror_msg("%s", argv[0]);
939 * if (rc > 0) bb_error_msg("exit code: %d", rc & 0xff);
941 int wait4pid(pid_t pid) FAST_FUNC;
942 /* Same as wait4pid(spawn(argv)), but with NOFORK/NOEXEC if configured: */
943 int spawn_and_wait(char **argv) FAST_FUNC;
944 /* Does NOT check that applet is NOFORK, just blindly runs it */
945 int run_nofork_applet(int applet_no, char **argv) FAST_FUNC;
947 /* Helpers for daemonization.
949 * bb_daemonize(flags) = daemonize, does not compile on NOMMU
951 * bb_daemonize_or_rexec(flags, argv) = daemonizes on MMU (and ignores argv),
952 * rexec's itself on NOMMU with argv passed as command line.
953 * Thus bb_daemonize_or_rexec may cause your <applet>_main() to be re-executed
954 * from the start. (It will detect it and not reexec again second time).
955 * You have to audit carefully that you don't do something twice as a result
956 * (opening files/sockets, parsing config files etc...)!
958 * Both of the above will redirect fd 0,1,2 to /dev/null and drop ctty
959 * (will do setsid()).
961 * fork_or_rexec(argv) = bare-bones fork on MMU,
962 * "vfork + re-exec ourself" on NOMMU. No fd redirection, no setsid().
963 * On MMU ignores argv.
965 * Helper for network daemons in foreground mode:
967 * bb_sanitize_stdio() = make sure that fd 0,1,2 are opened by opening them
968 * to /dev/null if they are not.
971 DAEMON_CHDIR_ROOT = 1,
972 DAEMON_DEVNULL_STDIO = 2,
973 DAEMON_CLOSE_EXTRA_FDS = 4,
974 DAEMON_ONLY_SANITIZE = 8, /* internal use */
975 DAEMON_DOUBLE_FORK = 16, /* double fork to avoid controlling tty */
978 enum { re_execed = 0 };
979 # define fork_or_rexec(argv) xfork()
980 # define bb_daemonize_or_rexec(flags, argv) bb_daemonize_or_rexec(flags)
981 # define bb_daemonize(flags) bb_daemonize_or_rexec(flags, bogus)
983 extern bool re_execed;
984 /* Note: re_exec() and fork_or_rexec() do argv[0][0] |= 0x80 on NOMMU!
985 * _Parent_ needs to undo it if it doesn't want to have argv[0] mangled.
987 void re_exec(char **argv) NORETURN FAST_FUNC;
988 pid_t fork_or_rexec(char **argv) FAST_FUNC;
989 int BUG_fork_is_unavailable_on_nommu(void) FAST_FUNC;
990 int BUG_daemon_is_unavailable_on_nommu(void) FAST_FUNC;
991 void BUG_bb_daemonize_is_unavailable_on_nommu(void) FAST_FUNC;
992 # define fork() BUG_fork_is_unavailable_on_nommu()
993 # define xfork() BUG_fork_is_unavailable_on_nommu()
994 # define daemon(a,b) BUG_daemon_is_unavailable_on_nommu()
995 # define bb_daemonize(a) BUG_bb_daemonize_is_unavailable_on_nommu()
997 void bb_daemonize_or_rexec(int flags, char **argv) FAST_FUNC;
998 void bb_sanitize_stdio(void) FAST_FUNC;
999 /* Clear dangerous stuff, set PATH. Return 1 if was run by different user. */
1000 int sanitize_env_if_suid(void) FAST_FUNC;
1003 char* single_argv(char **argv) FAST_FUNC;
1004 extern const char *const bb_argv_dash[]; /* "-", NULL */
1005 extern const char *opt_complementary;
1006 #if ENABLE_LONG_OPTS || ENABLE_FEATURE_GETOPT_LONG
1007 #define No_argument "\0"
1008 #define Required_argument "\001"
1009 #define Optional_argument "\002"
1010 extern const char *applet_long_options;
1012 extern uint32_t option_mask32;
1013 extern uint32_t getopt32(char **argv, const char *applet_opts, ...) FAST_FUNC;
1016 /* Having next pointer as a first member allows easy creation
1017 * of "llist-compatible" structs, and using llist_FOO functions
1020 typedef struct llist_t {
1021 struct llist_t *link;
1024 void llist_add_to(llist_t **old_head, void *data) FAST_FUNC;
1025 void llist_add_to_end(llist_t **list_head, void *data) FAST_FUNC;
1026 void *llist_pop(llist_t **elm) FAST_FUNC;
1027 void llist_unlink(llist_t **head, llist_t *elm) FAST_FUNC;
1028 void llist_free(llist_t *elm, void (*freeit)(void *data)) FAST_FUNC;
1029 llist_t *llist_rev(llist_t *list) FAST_FUNC;
1030 llist_t *llist_find_str(llist_t *first, const char *str) FAST_FUNC;
1031 /* BTW, surprisingly, changing API to
1032 * llist_t *llist_add_to(llist_t *old_head, void *data)
1033 * etc does not result in smaller code... */
1035 /* start_stop_daemon and udhcpc are special - they want
1036 * to create pidfiles regardless of FEATURE_PIDFILE */
1037 #if ENABLE_FEATURE_PIDFILE || defined(WANT_PIDFILE)
1038 /* True only if we created pidfile which is *file*, not /dev/null etc */
1039 extern smallint wrote_pidfile;
1040 void write_pidfile(const char *path) FAST_FUNC;
1041 #define remove_pidfile(path) do { if (wrote_pidfile) unlink(path); } while (0)
1043 enum { wrote_pidfile = 0 };
1044 #define write_pidfile(path) ((void)0)
1045 #define remove_pidfile(path) ((void)0)
1050 LOGMODE_STDIO = (1 << 0),
1051 LOGMODE_SYSLOG = (1 << 1) * ENABLE_FEATURE_SYSLOG,
1052 LOGMODE_BOTH = LOGMODE_SYSLOG + LOGMODE_STDIO,
1054 extern const char *msg_eol;
1055 extern smallint logmode;
1056 extern int die_sleep;
1057 extern uint8_t xfunc_error_retval;
1058 extern jmp_buf die_jmp;
1059 extern void xfunc_die(void) NORETURN FAST_FUNC;
1060 extern void bb_show_usage(void) NORETURN FAST_FUNC;
1061 extern void bb_error_msg(const char *s, ...) __attribute__ ((format (printf, 1, 2))) FAST_FUNC;
1062 extern void bb_error_msg_and_die(const char *s, ...) __attribute__ ((noreturn, format (printf, 1, 2))) FAST_FUNC;
1063 extern void bb_perror_msg(const char *s, ...) __attribute__ ((format (printf, 1, 2))) FAST_FUNC;
1064 extern void bb_simple_perror_msg(const char *s) FAST_FUNC;
1065 extern void bb_perror_msg_and_die(const char *s, ...) __attribute__ ((noreturn, format (printf, 1, 2))) FAST_FUNC;
1066 extern void bb_simple_perror_msg_and_die(const char *s) NORETURN FAST_FUNC;
1067 extern void bb_herror_msg(const char *s, ...) __attribute__ ((format (printf, 1, 2))) FAST_FUNC;
1068 extern void bb_herror_msg_and_die(const char *s, ...) __attribute__ ((noreturn, format (printf, 1, 2))) FAST_FUNC;
1069 extern void bb_perror_nomsg_and_die(void) NORETURN FAST_FUNC;
1070 extern void bb_perror_nomsg(void) FAST_FUNC;
1071 extern void bb_info_msg(const char *s, ...) __attribute__ ((format (printf, 1, 2))) FAST_FUNC;
1072 extern void bb_verror_msg(const char *s, va_list p, const char *strerr) FAST_FUNC;
1074 /* We need to export XXX_main from libbusybox
1075 * only if we build "individual" binaries
1077 #if ENABLE_FEATURE_INDIVIDUAL
1078 #define MAIN_EXTERNALLY_VISIBLE EXTERNALLY_VISIBLE
1080 #define MAIN_EXTERNALLY_VISIBLE
1084 /* Applets which are useful from another applets */
1085 int bb_cat(char** argv);
1086 /* If shell needs them, they exist even if not enabled as applets */
1087 int echo_main(int argc, char** argv) IF_ECHO(MAIN_EXTERNALLY_VISIBLE);
1088 int printf_main(int argc, char **argv) IF_PRINTF(MAIN_EXTERNALLY_VISIBLE);
1089 int test_main(int argc, char **argv) IF_TEST(MAIN_EXTERNALLY_VISIBLE);
1090 int kill_main(int argc, char **argv) IF_KILL(MAIN_EXTERNALLY_VISIBLE);
1091 /* Similar, but used by chgrp, not shell */
1092 int chown_main(int argc, char **argv) IF_CHOWN(MAIN_EXTERNALLY_VISIBLE);
1094 int ls_main(int argc, char **argv) IF_LS(MAIN_EXTERNALLY_VISIBLE);
1095 /* Don't need IF_xxx() guard for these */
1096 int gunzip_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
1097 int bunzip2_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
1100 void bb_displayroutes(int noresolve, int netstatfmt) FAST_FUNC;
1105 int create_icmp_socket(void) FAST_FUNC;
1106 int create_icmp6_socket(void) FAST_FUNC;
1108 /* This structure defines protocol families and their handlers. */
1114 char* FAST_FUNC (*print)(unsigned char *);
1115 const char* FAST_FUNC (*sprint)(struct sockaddr *, int numeric);
1116 int FAST_FUNC (*input)(/*int type,*/ const char *bufp, struct sockaddr *);
1117 void FAST_FUNC (*herror)(char *text);
1118 int FAST_FUNC (*rprint)(int options);
1119 int FAST_FUNC (*rinput)(int typ, int ext, char **argv);
1120 /* may modify src */
1121 int FAST_FUNC (*getmask)(char *src, struct sockaddr *mask, char *name);
1123 /* This structure defines hardware protocols and their handlers. */
1129 char* FAST_FUNC (*print)(unsigned char *);
1130 int FAST_FUNC (*input)(const char *, struct sockaddr *);
1131 int FAST_FUNC (*activate)(int fd);
1132 int suppress_null_addr;
1134 extern smallint interface_opt_a;
1135 int display_interfaces(char *ifname) FAST_FUNC;
1136 #if ENABLE_FEATURE_HWIB
1137 int in_ib(const char *bufp, struct sockaddr *sap) FAST_FUNC;
1139 #define in_ib(a, b) 1 /* fail */
1141 const struct aftype *get_aftype(const char *name) FAST_FUNC;
1142 const struct hwtype *get_hwtype(const char *name) FAST_FUNC;
1143 const struct hwtype *get_hwntype(int type) FAST_FUNC;
1146 #ifndef BUILD_INDIVIDUAL
1147 extern int find_applet_by_name(const char *name) FAST_FUNC;
1148 /* Returns only if applet is not found. */
1149 extern void run_applet_and_exit(const char *name, char **argv) FAST_FUNC;
1150 extern void run_applet_no_and_exit(int a, char **argv) NORETURN FAST_FUNC;
1153 #ifdef HAVE_MNTENT_H
1154 extern int match_fstype(const struct mntent *mt, const char *fstypes) FAST_FUNC;
1155 extern struct mntent *find_mount_point(const char *name, int subdir_too) FAST_FUNC;
1157 extern void erase_mtab(const char * name) FAST_FUNC;
1158 extern unsigned int tty_baud_to_value(speed_t speed) FAST_FUNC;
1159 extern speed_t tty_value_to_baud(unsigned int value) FAST_FUNC;
1161 extern void bb_warn_ignoring_args(char *arg) FAST_FUNC;
1163 # define bb_warn_ignoring_args(arg) ((void)0)
1166 extern int get_linux_version_code(void) FAST_FUNC;
1168 extern char *query_loop(const char *device) FAST_FUNC;
1169 extern int del_loop(const char *device) FAST_FUNC;
1170 /* If *devname is not NULL, use that name, otherwise try to find free one,
1171 * malloc and return it in *devname.
1172 * return value: 1: read-only loopdev was setup, 0: rw, < 0: error */
1173 extern int set_loop(char **devname, const char *file, unsigned long long offset, int ro) FAST_FUNC;
1175 /* Like bb_ask below, but asks on stdin with no timeout. */
1176 char *bb_ask_stdin(const char * prompt) FAST_FUNC;
1177 //TODO: pass buf pointer or return allocated buf (avoid statics)?
1178 char *bb_ask(const int fd, int timeout, const char * prompt) FAST_FUNC;
1179 int bb_ask_confirmation(void) FAST_FUNC;
1181 int bb_parse_mode(const char* s, mode_t* theMode) FAST_FUNC;
1184 * Config file parser
1187 PARSE_COLLAPSE = 0x00010000, // treat consecutive delimiters as one
1188 PARSE_TRIM = 0x00020000, // trim leading and trailing delimiters
1189 // TODO: COLLAPSE and TRIM seem to always go in pair
1190 PARSE_GREEDY = 0x00040000, // last token takes entire remainder of the line
1191 PARSE_MIN_DIE = 0x00100000, // die if < min tokens found
1192 // keep a copy of current line
1193 PARSE_KEEP_COPY = 0x00200000 * ENABLE_FEATURE_CROND_D,
1194 // PARSE_ESCAPE = 0x00400000, // process escape sequences in tokens
1196 // * remove leading and trailing delimiters and collapse
1197 // multiple delimiters into one
1198 // * warn and continue if less than mintokens delimiters found
1199 // * grab everything into last token
1200 PARSE_NORMAL = PARSE_COLLAPSE | PARSE_TRIM | PARSE_GREEDY,
1202 typedef struct parser_t {
1206 size_t line_alloc, nline_alloc;
1209 parser_t* config_open(const char *filename) FAST_FUNC;
1210 parser_t* config_open2(const char *filename, FILE* FAST_FUNC (*fopen_func)(const char *path)) FAST_FUNC;
1211 /* delims[0] is a comment char (use '\0' to disable), the rest are token delimiters */
1212 int config_read(parser_t *parser, char **tokens, unsigned flags, const char *delims) FAST_FUNC;
1213 #define config_read(parser, tokens, max, min, str, flags) \
1214 config_read(parser, tokens, ((flags) | (((min) & 0xFF) << 8) | ((max) & 0xFF)), str)
1215 void config_close(parser_t *parser) FAST_FUNC;
1217 /* Concatenate path and filename to new allocated buffer.
1218 * Add "/" only as needed (no duplicate "//" are produced).
1219 * If path is NULL, it is assumed to be "/".
1220 * filename should not be NULL. */
1221 char *concat_path_file(const char *path, const char *filename) FAST_FUNC;
1222 /* Returns NULL on . and .. */
1223 char *concat_subpath_file(const char *path, const char *filename) FAST_FUNC;
1226 int bb_make_directory(char *path, long mode, int flags) FAST_FUNC;
1228 int get_signum(const char *name) FAST_FUNC;
1229 const char *get_signame(int number) FAST_FUNC;
1230 void print_signames(void) FAST_FUNC;
1232 char *bb_simplify_path(const char *path) FAST_FUNC;
1233 /* Returns ptr to NUL */
1234 char *bb_simplify_abs_path_inplace(char *path) FAST_FUNC;
1236 #define LOGIN_FAIL_DELAY 3
1237 extern void bb_do_delay(int seconds) FAST_FUNC;
1238 extern void change_identity(const struct passwd *pw) FAST_FUNC;
1239 extern void run_shell(const char *shell, int loginshell, const char *command, const char **additional_args) NORETURN FAST_FUNC;
1241 /* Returns $SHELL, getpwuid(getuid())->pw_shell, or DEFAULT_SHELL.
1242 * Note that getpwuid result might need xstrdup'ing
1243 * if there is a possibility of intervening getpwxxx() calls.
1245 const char *get_shell_name(void);
1248 extern void renew_current_security_context(void) FAST_FUNC;
1249 extern void set_current_security_context(security_context_t sid) FAST_FUNC;
1250 extern context_t set_security_context_component(security_context_t cur_context,
1251 char *user, char *role, char *type, char *range) FAST_FUNC;
1252 extern void setfscreatecon_or_die(security_context_t scontext) FAST_FUNC;
1253 extern void selinux_preserve_fcontext(int fdesc) FAST_FUNC;
1255 #define selinux_preserve_fcontext(fdesc) ((void)0)
1257 extern void selinux_or_die(void) FAST_FUNC;
1260 /* systemd support */
1261 #define SD_LISTEN_FDS_START 3
1262 int sd_listen_fds(void);
1265 /* setup_environment:
1266 * if chdir pw->pw_dir: ok: else if to_tmp == 1: goto /tmp else: goto / or die
1267 * if clear_env = 1: cd(pw->pw_dir), clear environment, then set
1269 * USER=pw->pw_name, LOGNAME=pw->pw_name
1270 * PATH=bb_default_[root_]path
1273 * else if change_env = 1:
1274 * if not root (if pw->pw_uid != 0):
1275 * USER=pw->pw_name, LOGNAME=pw->pw_name
1280 #define SETUP_ENV_CHANGEENV (1 << 0)
1281 #define SETUP_ENV_CLEARENV (1 << 1)
1282 #define SETUP_ENV_TO_TMP (1 << 2)
1283 extern void setup_environment(const char *shell, int flags, const struct passwd *pw) FAST_FUNC;
1284 extern int correct_password(const struct passwd *pw) FAST_FUNC;
1285 /* Returns a malloced string */
1286 #if !ENABLE_USE_BB_CRYPT
1287 #define pw_encrypt(clear, salt, cleanup) pw_encrypt(clear, salt)
1289 extern char *pw_encrypt(const char *clear, const char *salt, int cleanup) FAST_FUNC;
1290 extern int obscure(const char *old, const char *newval, const struct passwd *pwdp) FAST_FUNC;
1292 * rnd is additional random input. New one is returned.
1293 * Useful if you call crypt_make_salt many times in a row:
1294 * rnd = crypt_make_salt(buf1, 4, 0);
1295 * rnd = crypt_make_salt(buf2, 4, rnd);
1296 * rnd = crypt_make_salt(buf3, 4, rnd);
1297 * (otherwise we risk having same salt generated)
1299 extern int crypt_make_salt(char *p, int cnt /*, int rnd*/) FAST_FUNC;
1300 /* "$N$" + sha_salt_16_bytes + NUL */
1301 #define MAX_PW_SALT_LEN (3 + 16 + 1)
1302 extern char* crypt_make_pw_salt(char p[MAX_PW_SALT_LEN], const char *algo) FAST_FUNC;
1305 /* Returns number of lines changed, or -1 on error */
1306 #if !(ENABLE_FEATURE_ADDUSER_TO_GROUP || ENABLE_FEATURE_DEL_USER_FROM_GROUP)
1307 #define update_passwd(filename, username, data, member) \
1308 update_passwd(filename, username, data)
1310 extern int update_passwd(const char *filename,
1311 const char *username,
1313 const char *member) FAST_FUNC;
1315 int index_in_str_array(const char *const string_array[], const char *key) FAST_FUNC;
1316 int index_in_strings(const char *strings, const char *key) FAST_FUNC;
1317 int index_in_substr_array(const char *const string_array[], const char *key) FAST_FUNC;
1318 int index_in_substrings(const char *strings, const char *key) FAST_FUNC;
1319 const char *nth_string(const char *strings, int n) FAST_FUNC;
1321 extern void print_login_issue(const char *issue_file, const char *tty) FAST_FUNC;
1322 extern void print_login_prompt(void) FAST_FUNC;
1324 char *xmalloc_ttyname(int fd) FAST_FUNC RETURNS_MALLOC;
1325 /* NB: typically you want to pass fd 0, not 1. Think 'applet | grep something' */
1326 int get_terminal_width_height(int fd, unsigned *width, unsigned *height) FAST_FUNC;
1328 int tcsetattr_stdin_TCSANOW(const struct termios *tp) FAST_FUNC;
1330 /* NB: "unsigned request" is crucial! "int request" will break some arches! */
1331 int ioctl_or_perror(int fd, unsigned request, void *argp, const char *fmt,...) __attribute__ ((format (printf, 4, 5))) FAST_FUNC;
1332 int ioctl_or_perror_and_die(int fd, unsigned request, void *argp, const char *fmt,...) __attribute__ ((format (printf, 4, 5))) FAST_FUNC;
1333 #if ENABLE_IOCTL_HEX2STR_ERROR
1334 int bb_ioctl_or_warn(int fd, unsigned request, void *argp, const char *ioctl_name) FAST_FUNC;
1335 int bb_xioctl(int fd, unsigned request, void *argp, const char *ioctl_name) FAST_FUNC;
1336 #define ioctl_or_warn(fd,request,argp) bb_ioctl_or_warn(fd,request,argp,#request)
1337 #define xioctl(fd,request,argp) bb_xioctl(fd,request,argp,#request)
1339 int bb_ioctl_or_warn(int fd, unsigned request, void *argp) FAST_FUNC;
1340 int bb_xioctl(int fd, unsigned request, void *argp) FAST_FUNC;
1341 #define ioctl_or_warn(fd,request,argp) bb_ioctl_or_warn(fd,request,argp)
1342 #define xioctl(fd,request,argp) bb_xioctl(fd,request,argp)
1345 char *is_in_ino_dev_hashtable(const struct stat *statbuf) FAST_FUNC;
1346 void add_to_ino_dev_hashtable(const struct stat *statbuf, const char *name) FAST_FUNC;
1347 void reset_ino_dev_hashtable(void) FAST_FUNC;
1349 /* At least glibc has horrendously large inline for this, so wrap it */
1350 unsigned long long bb_makedev(unsigned major, unsigned minor) FAST_FUNC;
1352 #define makedev(a,b) bb_makedev(a,b)
1356 /* "Keycodes" that report an escape sequence.
1357 * We use something which fits into signed char,
1358 * yet doesn't represent any valid Unicode character.
1359 * Also, -1 is reserved for error indication and we don't use it. */
1367 KEYCODE_INSERT = -8,
1368 KEYCODE_DELETE = -9,
1369 KEYCODE_PAGEUP = -10,
1370 KEYCODE_PAGEDOWN = -11,
1371 // -12 is reserved for Alt/Ctrl/Shift-TAB
1382 KEYCODE_FUN10 = -22,
1383 KEYCODE_FUN11 = -23,
1384 KEYCODE_FUN12 = -24,
1386 /* Be sure that last defined value is small enough
1387 * to not interfere with Alt/Ctrl/Shift bits.
1388 * So far we do not exceed -31 (0xfff..fffe1),
1389 * which gives us three upper bits in LSB to play with.
1391 //KEYCODE_SHIFT_TAB = (-12) & ~0x80,
1392 //KEYCODE_SHIFT_... = KEYCODE_... & ~0x80,
1393 //KEYCODE_CTRL_UP = KEYCODE_UP & ~0x40,
1394 //KEYCODE_CTRL_DOWN = KEYCODE_DOWN & ~0x40,
1395 KEYCODE_CTRL_RIGHT = KEYCODE_RIGHT & ~0x40,
1396 KEYCODE_CTRL_LEFT = KEYCODE_LEFT & ~0x40,
1397 //KEYCODE_ALT_UP = KEYCODE_UP & ~0x20,
1398 //KEYCODE_ALT_DOWN = KEYCODE_DOWN & ~0x20,
1399 KEYCODE_ALT_RIGHT = KEYCODE_RIGHT & ~0x20,
1400 KEYCODE_ALT_LEFT = KEYCODE_LEFT & ~0x20,
1402 KEYCODE_CURSOR_POS = -0x100, /* 0xfff..fff00 */
1403 /* How long is the longest ESC sequence we know?
1404 * We want it big enough to be able to contain
1405 * cursor position sequence "ESC [ 9999 ; 9999 R"
1407 KEYCODE_BUFFER_SIZE = 16
1409 /* Note: fd may be in blocking or non-blocking mode, both make sense.
1410 * For one, less uses non-blocking mode.
1411 * Only the first read syscall inside read_key may block indefinitely
1412 * (unless fd is in non-blocking mode),
1413 * subsequent reads will time out after a few milliseconds.
1414 * Return of -1 means EOF or error (errno == 0 on EOF).
1415 * buffer[0] is used as a counter of buffered chars and must be 0
1418 * -2: do not poll for input;
1419 * -1: poll(-1) (i.e. block);
1420 * >=0: poll for TIMEOUT milliseconds, return -1/EAGAIN on timeout
1422 int64_t read_key(int fd, char *buffer, int timeout) FAST_FUNC;
1423 void read_key_ungets(char *buffer, const char *str, unsigned len) FAST_FUNC;
1426 #if ENABLE_FEATURE_EDITING
1427 /* It's NOT just ENABLEd or disabled. It's a number: */
1428 # if defined CONFIG_FEATURE_EDITING_HISTORY && CONFIG_FEATURE_EDITING_HISTORY > 0
1429 # define MAX_HISTORY (CONFIG_FEATURE_EDITING_HISTORY + 0)
1430 unsigned size_from_HISTFILESIZE(const char *hp);
1432 # define MAX_HISTORY 0
1434 typedef struct line_input_t {
1436 const char *path_lookup;
1440 int max_history; /* must never be <= 0 */
1441 # if ENABLE_FEATURE_EDITING_SAVEHISTORY
1442 /* meaning of this field depends on FEATURE_EDITING_SAVE_ON_EXIT:
1443 * if !FEATURE_EDITING_SAVE_ON_EXIT: "how many lines are
1444 * in on-disk history"
1445 * if FEATURE_EDITING_SAVE_ON_EXIT: "how many in-memory lines are
1446 * also in on-disk history (and thus need to be skipped on save)"
1448 unsigned cnt_history_in_file;
1449 const char *hist_file;
1451 char *history[MAX_HISTORY + 1];
1455 DO_HISTORY = 1 * (MAX_HISTORY > 0),
1456 TAB_COMPLETION = 2 * ENABLE_FEATURE_TAB_COMPLETION,
1457 USERNAME_COMPLETION = 4 * ENABLE_FEATURE_USERNAME_COMPLETION,
1458 VI_MODE = 8 * ENABLE_FEATURE_EDITING_VI,
1459 WITH_PATH_LOOKUP = 0x10,
1460 FOR_SHELL = DO_HISTORY | TAB_COMPLETION | USERNAME_COMPLETION,
1462 line_input_t *new_line_input_t(int flags) FAST_FUNC;
1463 /* So far static: void free_line_input_t(line_input_t *n) FAST_FUNC; */
1465 * maxsize must be >= 2.
1467 * -1 on read errors or EOF, or on bare Ctrl-D,
1468 * 0 on ctrl-C (the line entered is still returned in 'command'),
1469 * >0 length of input string, including terminating '\n'
1471 int read_line_input(line_input_t *st, const char *prompt, char *command, int maxsize, int timeout) FAST_FUNC;
1472 # if ENABLE_FEATURE_EDITING_SAVE_ON_EXIT
1473 void save_history(line_input_t *st);
1476 #define MAX_HISTORY 0
1477 int read_line_input(const char* prompt, char* command, int maxsize) FAST_FUNC;
1478 #define read_line_input(state, prompt, command, maxsize, timeout) \
1479 read_line_input(prompt, command, maxsize)
1484 # ifdef TASK_COMM_LEN
1485 enum { COMM_LEN = TASK_COMM_LEN };
1487 /* synchronize with sizeof(task_struct.comm) in /usr/include/linux/sched.h */
1488 enum { COMM_LEN = 16 };
1493 unsigned long mapped_rw;
1494 unsigned long mapped_ro;
1495 unsigned long shared_clean;
1496 unsigned long shared_dirty;
1497 unsigned long private_clean;
1498 unsigned long private_dirty;
1499 unsigned long stack;
1500 unsigned long smap_pss, smap_swap;
1501 unsigned long smap_size;
1502 unsigned long smap_start;
1508 #define procps_read_smaps(pid, total, cb, data) \
1509 procps_read_smaps(pid, total)
1511 int FAST_FUNC procps_read_smaps(pid_t pid, struct smaprec *total,
1512 void (*cb)(struct smaprec *, void *), void *data);
1514 typedef struct procps_status_t {
1516 IF_FEATURE_SHOW_THREADS(DIR *task_dir;)
1517 uint8_t shift_pages_to_bytes;
1518 uint8_t shift_pages_to_kb;
1519 /* Fields are set to 0/NULL if failed to determine (or not requested) */
1523 IF_SELINUX(char *context;)
1524 IF_FEATURE_SHOW_THREADS(unsigned main_thread_pid;)
1525 /* Everything below must contain no ptrs to malloc'ed data:
1526 * it is memset(0) for each process in procps_scan() */
1527 unsigned long vsz, rss; /* we round it to kbytes */
1528 unsigned long stime, utime;
1529 unsigned long start_time;
1536 #if ENABLE_FEATURE_PS_ADDITIONAL_COLUMNS
1541 unsigned tty_major,tty_minor;
1542 #if ENABLE_FEATURE_TOPMEM
1543 struct smaprec smaps;
1546 /* basename of executable in exec(2), read from /proc/N/stat
1547 * (if executable is symlink or script, it is NOT replaced
1548 * by link target or interpreter name) */
1549 char comm[COMM_LEN];
1550 /* user/group? - use passwd/group parsing functions */
1551 #if ENABLE_FEATURE_TOP_SMP_PROCESS
1552 int last_seen_on_cpu;
1555 /* flag bits for procps_scan(xx, flags) calls */
1557 PSSCAN_PID = 1 << 0,
1558 PSSCAN_PPID = 1 << 1,
1559 PSSCAN_PGID = 1 << 2,
1560 PSSCAN_SID = 1 << 3,
1561 PSSCAN_UIDGID = 1 << 4,
1562 PSSCAN_COMM = 1 << 5,
1563 /* PSSCAN_CMD = 1 << 6, - use read_cmdline instead */
1564 PSSCAN_ARGV0 = 1 << 7,
1565 PSSCAN_EXE = 1 << 8,
1566 PSSCAN_STATE = 1 << 9,
1567 PSSCAN_VSZ = 1 << 10,
1568 PSSCAN_RSS = 1 << 11,
1569 PSSCAN_STIME = 1 << 12,
1570 PSSCAN_UTIME = 1 << 13,
1571 PSSCAN_TTY = 1 << 14,
1572 PSSCAN_SMAPS = (1 << 15) * ENABLE_FEATURE_TOPMEM,
1573 /* NB: used by find_pid_by_name(). Any applet using it
1574 * needs to be mentioned here. */
1575 PSSCAN_ARGVN = (1 << 16) * (ENABLE_KILLALL
1576 || ENABLE_PGREP || ENABLE_PKILL
1580 PSSCAN_CONTEXT = (1 << 17) * ENABLE_SELINUX,
1581 PSSCAN_START_TIME = 1 << 18,
1582 PSSCAN_CPU = (1 << 19) * ENABLE_FEATURE_TOP_SMP_PROCESS,
1583 PSSCAN_NICE = (1 << 20) * ENABLE_FEATURE_PS_ADDITIONAL_COLUMNS,
1584 PSSCAN_RUIDGID = (1 << 21) * ENABLE_FEATURE_PS_ADDITIONAL_COLUMNS,
1585 PSSCAN_TASKS = (1 << 22) * ENABLE_FEATURE_SHOW_THREADS,
1587 //procps_status_t* alloc_procps_scan(void) FAST_FUNC;
1588 void free_procps_scan(procps_status_t* sp) FAST_FUNC;
1589 procps_status_t* procps_scan(procps_status_t* sp, int flags) FAST_FUNC;
1590 /* Format cmdline (up to col chars) into char buf[size] */
1591 /* Puts [comm] if cmdline is empty (-> process is a kernel thread) */
1592 void read_cmdline(char *buf, int size, unsigned pid, const char *comm) FAST_FUNC;
1593 pid_t *find_pid_by_name(const char* procName) FAST_FUNC;
1594 pid_t *pidlist_reverse(pid_t *pidList) FAST_FUNC;
1595 int starts_with_cpu(const char *str) FAST_FUNC;
1596 unsigned get_cpu_count(void) FAST_FUNC;
1599 /* Use strict=1 if you process input from untrusted source:
1600 * it will return NULL on invalid %xx (bad hex chars)
1601 * and str + 1 if decoded char is / or NUL.
1602 * In non-strict mode, it always succeeds (returns str),
1603 * and also it additionally decoded '+' to space.
1605 char *percent_decode_in_place(char *str, int strict) FAST_FUNC;
1608 extern const char bb_uuenc_tbl_base64[];
1609 extern const char bb_uuenc_tbl_std[];
1610 void bb_uuencode(char *store, const void *s, int length, const char *tbl) FAST_FUNC;
1612 BASE64_FLAG_UU_STOP = 0x100,
1613 /* Sign-extends to a value which never matches fgetc result: */
1614 BASE64_FLAG_NO_STOP_CHAR = 0x80,
1616 const char *decode_base64(char **pp_dst, const char *src) FAST_FUNC;
1617 void read_base64(FILE *src_stream, FILE *dst_stream, int flags) FAST_FUNC;
1619 typedef struct md5_ctx_t {
1620 uint8_t wbuffer[64]; /* always correctly aligned for uint64_t */
1621 void (*process_block)(struct md5_ctx_t*) FAST_FUNC;
1622 uint64_t total64; /* must be directly before hash[] */
1623 uint32_t hash[8]; /* 4 elements for md5, 5 for sha1, 8 for sha256 */
1625 typedef struct md5_ctx_t sha1_ctx_t;
1626 typedef struct md5_ctx_t sha256_ctx_t;
1627 typedef struct sha512_ctx_t {
1628 uint64_t total64[2]; /* must be directly before hash[] */
1630 uint8_t wbuffer[128]; /* always correctly aligned for uint64_t */
1632 void md5_begin(md5_ctx_t *ctx) FAST_FUNC;
1633 void md5_hash(md5_ctx_t *ctx, const void *data, size_t length) FAST_FUNC;
1634 void md5_end(md5_ctx_t *ctx, void *resbuf) FAST_FUNC;
1635 void sha1_begin(sha1_ctx_t *ctx) FAST_FUNC;
1636 #define sha1_hash md5_hash
1637 void sha1_end(sha1_ctx_t *ctx, void *resbuf) FAST_FUNC;
1638 void sha256_begin(sha256_ctx_t *ctx) FAST_FUNC;
1639 #define sha256_hash md5_hash
1640 #define sha256_end sha1_end
1641 void sha512_begin(sha512_ctx_t *ctx) FAST_FUNC;
1642 void sha512_hash(sha512_ctx_t *ctx, const void *buffer, size_t len) FAST_FUNC;
1643 void sha512_end(sha512_ctx_t *ctx, void *resbuf) FAST_FUNC;
1645 extern uint32_t *global_crc32_table;
1646 uint32_t *crc32_filltable(uint32_t *tbl256, int endian) FAST_FUNC;
1647 uint32_t crc32_block_endian1(uint32_t val, const void *buf, unsigned len, uint32_t *crc_table) FAST_FUNC;
1648 uint32_t crc32_block_endian0(uint32_t val, const void *buf, unsigned len, uint32_t *crc_table) FAST_FUNC;
1650 typedef struct masks_labels_t {
1654 int print_flags_separated(const int *masks, const char *labels,
1655 int flags, const char *separator) FAST_FUNC;
1656 int print_flags(const masks_labels_t *ml, int flags) FAST_FUNC;
1658 typedef struct bb_progress_t {
1660 unsigned last_update_sec;
1661 unsigned last_change_sec;
1663 const char *curfile;
1666 #define is_bb_progress_inited(p) ((p)->curfile != NULL)
1667 #define bb_progress_free(p) do { \
1668 if (ENABLE_UNICODE_SUPPORT) free((char*)((p)->curfile)); \
1669 (p)->curfile = NULL; \
1671 void bb_progress_init(bb_progress_t *p, const char *curfile) FAST_FUNC;
1672 void bb_progress_update(bb_progress_t *p,
1675 uoff_t totalsize) FAST_FUNC;
1678 extern const char *applet_name;
1680 /* Some older linkers don't perform string merging, we used to have common strings
1681 * as global arrays to do it by hand. But:
1682 * (1) newer linkers do it themselves,
1683 * (2) however, they DONT merge string constants with global arrays,
1684 * even if the value is the same (!). Thus global arrays actually
1685 * increased size a bit: for example, "/etc/passwd" string from libc
1686 * wasn't merged with bb_path_passwd_file[] array!
1687 * Therefore now we use #defines.
1689 /* "BusyBox vN.N.N (timestamp or extra_version)" */
1690 extern const char bb_banner[];
1691 extern const char bb_msg_memory_exhausted[];
1692 extern const char bb_msg_invalid_date[];
1693 #define bb_msg_read_error "read error"
1694 #define bb_msg_write_error "write error"
1695 extern const char bb_msg_unknown[];
1696 extern const char bb_msg_can_not_create_raw_socket[];
1697 extern const char bb_msg_perm_denied_are_you_root[];
1698 extern const char bb_msg_you_must_be_root[];
1699 extern const char bb_msg_requires_arg[];
1700 extern const char bb_msg_invalid_arg[];
1701 extern const char bb_msg_standard_input[];
1702 extern const char bb_msg_standard_output[];
1704 /* NB: (bb_hexdigits_upcase[i] | 0x20) -> lowercase hex digit */
1705 extern const char bb_hexdigits_upcase[];
1707 extern const char bb_path_wtmp_file[];
1709 /* Busybox mount uses either /proc/mounts or /etc/mtab to
1710 * get the list of currently mounted filesystems */
1711 #define bb_path_mtab_file IF_FEATURE_MTAB_SUPPORT("/etc/mtab")IF_NOT_FEATURE_MTAB_SUPPORT("/proc/mounts")
1713 #define bb_path_passwd_file _PATH_PASSWD
1714 #define bb_path_group_file _PATH_GROUP
1715 #define bb_path_shadow_file _PATH_SHADOW
1716 #define bb_path_gshadow_file _PATH_GSHADOW
1718 #define bb_path_motd_file "/etc/motd"
1720 #define bb_dev_null "/dev/null"
1721 extern const char bb_busybox_exec_path[];
1722 /* util-linux manpage says /sbin:/bin:/usr/sbin:/usr/bin,
1723 * but I want to save a few bytes here */
1724 extern const char bb_PATH_root_path[]; /* "PATH=/sbin:/usr/sbin:/bin:/usr/bin" */
1725 #define bb_default_root_path (bb_PATH_root_path + sizeof("PATH"))
1726 #define bb_default_path (bb_PATH_root_path + sizeof("PATH=/sbin:/usr/sbin"))
1728 extern const int const_int_0;
1729 extern const int const_int_1;
1732 /* Providing hard guarantee on minimum size (think of BUFSIZ == 128) */
1733 enum { COMMON_BUFSIZE = (BUFSIZ >= 256*sizeof(void*) ? BUFSIZ+1 : 256*sizeof(void*)) };
1734 extern char bb_common_bufsiz1[COMMON_BUFSIZE];
1735 /* This struct is deliberately not defined. */
1736 /* See docs/keep_data_small.txt */
1738 /* '*const' ptr makes gcc optimize code much better.
1739 * Magic prevents ptr_to_globals from going into rodata.
1740 * If you want to assign a value, use SET_PTR_TO_GLOBALS(x) */
1741 extern struct globals *const ptr_to_globals;
1742 /* At least gcc 3.4.6 on mipsel system needs optimization barrier */
1743 #define barrier() __asm__ __volatile__("":::"memory")
1744 #define SET_PTR_TO_GLOBALS(x) do { \
1745 (*(struct globals**)&ptr_to_globals) = (void*)(x); \
1749 /* You can change LIBBB_DEFAULT_LOGIN_SHELL, but don't use it,
1750 * use bb_default_login_shell and following defines.
1751 * If you change LIBBB_DEFAULT_LOGIN_SHELL,
1752 * don't forget to change increment constant. */
1753 #define LIBBB_DEFAULT_LOGIN_SHELL "-/bin/sh"
1754 extern const char bb_default_login_shell[];
1756 #define DEFAULT_SHELL (bb_default_login_shell+1)
1758 #define DEFAULT_SHELL_SHORT_NAME (bb_default_login_shell+6)
1760 /* The following devices are the same on all systems. */
1761 #define CURRENT_TTY "/dev/tty"
1762 #define DEV_CONSOLE "/dev/console"
1764 #if defined(__FreeBSD_kernel__)
1765 # define CURRENT_VC CURRENT_TTY
1766 # define VC_1 "/dev/ttyv0"
1767 # define VC_2 "/dev/ttyv1"
1768 # define VC_3 "/dev/ttyv2"
1769 # define VC_4 "/dev/ttyv3"
1770 # define VC_5 "/dev/ttyv4"
1771 # define VC_FORMAT "/dev/ttyv%d"
1772 #elif defined(__GNU__)
1773 # define CURRENT_VC CURRENT_TTY
1774 # define VC_1 "/dev/tty1"
1775 # define VC_2 "/dev/tty2"
1776 # define VC_3 "/dev/tty3"
1777 # define VC_4 "/dev/tty4"
1778 # define VC_5 "/dev/tty5"
1779 # define VC_FORMAT "/dev/tty%d"
1780 #elif ENABLE_FEATURE_DEVFS
1781 /*Linux, obsolete devfs names */
1782 # define CURRENT_VC "/dev/vc/0"
1783 # define VC_1 "/dev/vc/1"
1784 # define VC_2 "/dev/vc/2"
1785 # define VC_3 "/dev/vc/3"
1786 # define VC_4 "/dev/vc/4"
1787 # define VC_5 "/dev/vc/5"
1788 # define VC_FORMAT "/dev/vc/%d"
1789 # define LOOP_FORMAT "/dev/loop/%d"
1790 # define LOOP_NAMESIZE (sizeof("/dev/loop/") + sizeof(int)*3 + 1)
1791 # define LOOP_NAME "/dev/loop/"
1792 # define FB_0 "/dev/fb/0"
1794 /*Linux, normal names */
1795 # define CURRENT_VC "/dev/tty0"
1796 # define VC_1 "/dev/tty1"
1797 # define VC_2 "/dev/tty2"
1798 # define VC_3 "/dev/tty3"
1799 # define VC_4 "/dev/tty4"
1800 # define VC_5 "/dev/tty5"
1801 # define VC_FORMAT "/dev/tty%d"
1802 # define LOOP_FORMAT "/dev/loop%d"
1803 # define LOOP_NAMESIZE (sizeof("/dev/loop") + sizeof(int)*3 + 1)
1804 # define LOOP_NAME "/dev/loop"
1805 # define FB_0 "/dev/fb0"
1809 #define ARRAY_SIZE(x) ((unsigned)(sizeof(x) / sizeof((x)[0])))
1812 /* We redefine ctype macros. Unicode-correct handling of char types
1813 * can't be done with such byte-oriented operations anyway,
1814 * we don't lose anything.
1832 /* We save ~500 bytes on isdigit alone.
1833 * BTW, x86 likes (unsigned char) cast more than (unsigned). */
1835 /* These work the same for ASCII and Unicode,
1836 * assuming no one asks "is this a *Unicode* letter?" using isalpha(letter) */
1837 #define isascii(a) ((unsigned char)(a) <= 0x7f)
1838 #define isdigit(a) ((unsigned char)((a) - '0') <= 9)
1839 #define isupper(a) ((unsigned char)((a) - 'A') <= ('Z' - 'A'))
1840 #define islower(a) ((unsigned char)((a) - 'a') <= ('z' - 'a'))
1841 #define isalpha(a) ((unsigned char)(((a)|0x20) - 'a') <= ('z' - 'a'))
1842 #define isblank(a) ({ unsigned char bb__isblank = (a); bb__isblank == ' ' || bb__isblank == '\t'; })
1843 #define iscntrl(a) ({ unsigned char bb__iscntrl = (a); bb__iscntrl < ' ' || bb__iscntrl == 0x7f; })
1844 /* In POSIX/C locale isspace is only these chars: "\t\n\v\f\r" and space.
1845 * "\t\n\v\f\r" happen to have ASCII codes 9,10,11,12,13.
1847 #define isspace(a) ({ unsigned char bb__isspace = (a) - 9; bb__isspace == (' ' - 9) || bb__isspace <= (13 - 9); })
1848 // Unsafe wrt NUL: #define ispunct(a) (strchr("!\"#$%&'()*+,-./:;<=>?@[\\]^_`{|}~", (a)) != NULL)
1849 #define ispunct(a) (strchrnul("!\"#$%&'()*+,-./:;<=>?@[\\]^_`{|}~", (a))[0])
1850 // Bigger code: #define isalnum(a) ({ unsigned char bb__isalnum = (a) - '0'; bb__isalnum <= 9 || ((bb__isalnum - ('A' - '0')) & 0xdf) <= 25; })
1851 #define isalnum(a) bb_ascii_isalnum(a)
1852 static ALWAYS_INLINE int bb_ascii_isalnum(unsigned char a)
1854 unsigned char b = a - '0';
1858 return b <= 'z' - 'a';
1860 #define isxdigit(a) bb_ascii_isxdigit(a)
1861 static ALWAYS_INLINE int bb_ascii_isxdigit(unsigned char a)
1863 unsigned char b = a - '0';
1867 return b <= 'f' - 'a';
1869 #define toupper(a) bb_ascii_toupper(a)
1870 static ALWAYS_INLINE unsigned char bb_ascii_toupper(unsigned char a)
1872 unsigned char b = a - 'a';
1873 if (b <= ('z' - 'a'))
1877 #define tolower(a) bb_ascii_tolower(a)
1878 static ALWAYS_INLINE unsigned char bb_ascii_tolower(unsigned char a)
1880 unsigned char b = a - 'A';
1881 if (b <= ('Z' - 'A'))
1886 /* In ASCII and Unicode, these are likely to be very different.
1887 * Let's prevent ambiguous usage from the start */
1888 #define isgraph(a) isgraph_is_ambiguous_dont_use(a)
1889 #define isprint(a) isprint_is_ambiguous_dont_use(a)
1890 /* NB: must not treat EOF as isgraph or isprint */
1891 #define isgraph_asciionly(a) ((unsigned)((a) - 0x21) <= 0x7e - 0x21)
1892 #define isprint_asciionly(a) ((unsigned)((a) - 0x20) <= 0x7e - 0x20)
1895 POP_SAVED_FUNCTION_VISIBILITY