/*
* Mini ps implementation(s) for busybox
*
- * Copyright (C) 1999,2000 by Lineo, inc. and Erik Andersen
- * Copyright (C) 1999,2000,2001 by Erik Andersen <andersee@debian.org>
+ * Copyright (C) 1999-2004 by Erik Andersen <andersen@codepoet.org>
+ * Fix for SELinux Support:(c)2007 Hiroshi Shinji <shiroshi@my.email.ne.jp>
+ * (c)2007 Yuichi Nakamura <ynakam@hitachisoft.jp>
*
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU General Public License as published by the Free
- * Software Foundation; either version 2 of the License, or (at your option)
- * any later version.
- *
- * This program is distributed in the hope that it will be useful, but WITHOUT
- * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
- * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
- * more details.
- *
- * You should have received a copy of the GNU General Public License along with
- * this program; if not, write to the Free Software Foundation, Inc., 59 Temple
- * Place, Suite 330, Boston, MA 02111-1307 USA
+ * Licensed under GPLv2, see file LICENSE in this source tree.
*/
-/*
- * This contains _two_ implementations of ps for Linux. One uses the
- * traditional /proc virtual filesystem, and the other use the devps kernel
- * driver (written by Erik Andersen to avoid using /proc thereby saving 100k+).
+//usage:#if ENABLE_DESKTOP
+//usage:
+//usage:#define ps_trivial_usage
+//usage: "[-o COL1,COL2=HEADER]" IF_FEATURE_SHOW_THREADS(" [-T]")
+//usage:#define ps_full_usage "\n\n"
+//usage: "Show list of processes\n"
+//usage: "\n -o COL1,COL2=HEADER Select columns for display"
+//usage: IF_FEATURE_SHOW_THREADS(
+//usage: "\n -T Show threads"
+//usage: )
+//usage:
+//usage:#else /* !ENABLE_DESKTOP */
+//usage:
+//usage:#if !ENABLE_SELINUX && !ENABLE_FEATURE_PS_WIDE
+//usage:#define USAGE_PS "\nThis version of ps accepts no options"
+//usage:#else
+//usage:#define USAGE_PS ""
+//usage:#endif
+//usage:
+//usage:#define ps_trivial_usage
+//usage: ""
+//usage:#define ps_full_usage "\n\n"
+//usage: "Show list of processes\n"
+//usage: USAGE_PS
+//usage: IF_SELINUX(
+//usage: "\n -Z Show selinux context"
+//usage: )
+//usage: IF_FEATURE_PS_WIDE(
+//usage: "\n w Wide output"
+//usage: )
+//usage: IF_FEATURE_PS_LONG(
+//usage: "\n l Long output"
+//usage: )
+//usage: IF_FEATURE_SHOW_THREADS(
+//usage: "\n T Show threads"
+//usage: )
+//usage:
+//usage:#endif /* ENABLE_DESKTOP */
+//usage:
+//usage:#define ps_example_usage
+//usage: "$ ps\n"
+//usage: " PID Uid Gid State Command\n"
+//usage: " 1 root root S init\n"
+//usage: " 2 root root S [kflushd]\n"
+//usage: " 3 root root S [kupdate]\n"
+//usage: " 4 root root S [kpiod]\n"
+//usage: " 5 root root S [kswapd]\n"
+//usage: " 742 andersen andersen S [bash]\n"
+//usage: " 743 andersen andersen S -bash\n"
+//usage: " 745 root root S [getty]\n"
+//usage: " 2990 andersen andersen R ps\n"
+
+#include "libbb.h"
+#ifdef __linux__
+# include <sys/sysinfo.h>
+#endif
+
+/* Absolute maximum on output line length */
+enum { MAX_WIDTH = 2*1024 };
+
+#if ENABLE_FEATURE_PS_TIME || ENABLE_FEATURE_PS_LONG
+static unsigned long get_uptime(void)
+{
+#ifdef __linux__
+ struct sysinfo info;
+ if (sysinfo(&info) < 0)
+ return 0;
+ return info.uptime;
+#elif 1
+ unsigned long uptime;
+ char buf[sizeof(uptime)*3 + 2];
+ /* /proc/uptime is "UPTIME_SEC.NN IDLE_SEC.NN\n"
+ * (where IDLE is cumulative over all CPUs)
+ */
+ if (open_read_close("/proc/uptime", buf, sizeof(buf)) <= 0)
+ bb_perror_msg_and_die("can't read '%s'", "/proc/uptime");
+ buf[sizeof(buf)-1] = '\0';
+ sscanf(buf, "%lu", &uptime);
+ return uptime;
+#else
+ struct timespec ts;
+ if (clock_gettime(CLOCK_MONOTONIC, &ts) < 0)
+ return 0;
+ return ts.tv_sec;
+#endif
+}
+#endif
+
+#if ENABLE_DESKTOP
+
+#include <sys/times.h> /* for times() */
+#ifndef AT_CLKTCK
+# define AT_CLKTCK 17
+#endif
+
+/* TODO:
+ * http://pubs.opengroup.org/onlinepubs/9699919799/utilities/ps.html
+ * specifies (for XSI-conformant systems) following default columns
+ * (l and f mark columns shown with -l and -f respectively):
+ * F l Flags (octal and additive) associated with the process (??)
+ * S l The state of the process
+ * UID f,l The user ID; the login name is printed with -f
+ * PID The process ID
+ * PPID f,l The parent process
+ * C f,l Processor utilization
+ * PRI l The priority of the process; higher numbers mean lower priority
+ * NI l Nice value
+ * ADDR l The address of the process
+ * SZ l The size in blocks of the core image of the process
+ * WCHAN l The event for which the process is waiting or sleeping
+ * STIME f Starting time of the process
+ * TTY The controlling terminal for the process
+ * TIME The cumulative execution time for the process
+ * CMD The command name; the full command line is shown with -f
*/
+typedef struct {
+ uint16_t width;
+ char name6[6];
+ const char *header;
+ void (*f)(char *buf, int size, const procps_status_t *ps);
+ int ps_flags;
+} ps_out_t;
+
+struct globals {
+ ps_out_t* out;
+ int out_cnt;
+ int print_header;
+ int need_flags;
+ char *buffer;
+ unsigned terminal_width;
+#if ENABLE_FEATURE_PS_TIME
+ unsigned kernel_HZ;
+ unsigned long seconds_since_boot;
+#endif
+} FIX_ALIASING;
+#define G (*(struct globals*)&bb_common_bufsiz1)
+#define out (G.out )
+#define out_cnt (G.out_cnt )
+#define print_header (G.print_header )
+#define need_flags (G.need_flags )
+#define buffer (G.buffer )
+#define terminal_width (G.terminal_width )
+#define kernel_HZ (G.kernel_HZ )
+#define INIT_G() do { } while (0)
+
+#if ENABLE_FEATURE_PS_TIME
+/* for ELF executables, notes are pushed before environment and args */
+static uintptr_t find_elf_note(uintptr_t findme)
+{
+ uintptr_t *ep = (uintptr_t *) environ;
-#include <stdio.h>
-#include <stdlib.h>
-#include <unistd.h>
-#include <dirent.h>
-#include <errno.h>
-#include <fcntl.h>
-#include <ctype.h>
-#include <string.h>
-#include <termios.h>
-#include <sys/ioctl.h>
-#include "busybox.h"
+ while (*ep++)
+ continue;
+ while (*ep) {
+ if (ep[0] == findme) {
+ return ep[1];
+ }
+ ep += 2;
+ }
+ return -1;
+}
-static const int TERMINAL_WIDTH = 79; /* not 80 in case terminal has linefold bug */
+#if ENABLE_FEATURE_PS_UNUSUAL_SYSTEMS
+static unsigned get_HZ_by_waiting(void)
+{
+ struct timeval tv1, tv2;
+ unsigned t1, t2, r, hz;
+ unsigned cnt = cnt; /* for compiler */
+ int diff;
+
+ r = 0;
+
+ /* Wait for times() to reach new tick */
+ t1 = times(NULL);
+ do {
+ t2 = times(NULL);
+ } while (t2 == t1);
+ gettimeofday(&tv2, NULL);
+
+ do {
+ t1 = t2;
+ tv1.tv_usec = tv2.tv_usec;
+
+ /* Wait exactly one times() tick */
+ do {
+ t2 = times(NULL);
+ } while (t2 == t1);
+ gettimeofday(&tv2, NULL);
+
+ /* Calculate ticks per sec, rounding up to even */
+ diff = tv2.tv_usec - tv1.tv_usec;
+ if (diff <= 0) diff += 1000000;
+ hz = 1000000u / (unsigned)diff;
+ hz = (hz+1) & ~1;
+
+ /* Count how many same hz values we saw */
+ if (r != hz) {
+ r = hz;
+ cnt = 0;
+ }
+ cnt++;
+ } while (cnt < 3); /* exit if saw 3 same values */
+ return r;
+}
+#else
+static inline unsigned get_HZ_by_waiting(void)
+{
+ /* Better method? */
+ return 100;
+}
+#endif
+static unsigned get_kernel_HZ(void)
+{
+ if (kernel_HZ)
+ return kernel_HZ;
-#if ! defined CONFIG_FEATURE_USE_DEVPS_PATCH
+ /* Works for ELF only, Linux 2.4.0+ */
+ kernel_HZ = find_elf_note(AT_CLKTCK);
+ if (kernel_HZ == (unsigned)-1)
+ kernel_HZ = get_HZ_by_waiting();
-/* The following is the first ps implementation --
- * the one using the /proc virtual filesystem.
- */
+ G.seconds_since_boot = get_uptime();
-typedef struct proc_s {
- char cmd[16]; /* basename of executable file in call to exec(2) */
- int ruid; /* real only (sorry) */
- int pid; /* process id */
- int ppid; /* pid of parent process */
- char state; /* single-char code for process state (S=sleeping) */
- unsigned int vmsize; /* size of process as far as the vm is concerned */
-} proc_t;
+ return kernel_HZ;
+}
+#endif
+/* Print value to buf, max size+1 chars (including trailing '\0') */
+static void func_user(char *buf, int size, const procps_status_t *ps)
+{
+#if 1
+ safe_strncpy(buf, get_cached_username(ps->uid), size+1);
+#else
+ /* "compatible" version, but it's larger */
+ /* procps 2.18 shows numeric UID if name overflows the field */
+ /* TODO: get_cached_username() returns numeric string if
+ * user has no passwd record, we will display it
+ * left-justified here; too long usernames are shown
+ * as _right-justified_ IDs. Is it worth fixing? */
+ const char *user = get_cached_username(ps->uid);
+ if (strlen(user) <= size)
+ safe_strncpy(buf, user, size+1);
+ else
+ sprintf(buf, "%*u", size, (unsigned)ps->uid);
+#endif
+}
-static int file2str(char *filename, char *ret, int cap)
+static void func_group(char *buf, int size, const procps_status_t *ps)
{
- int fd, num_read;
+ safe_strncpy(buf, get_cached_groupname(ps->gid), size+1);
+}
- if ((fd = open(filename, O_RDONLY, 0)) == -1)
- return -1;
- if ((num_read = read(fd, ret, cap - 1)) <= 0)
- return -1;
- ret[num_read] = 0;
- close(fd);
- return num_read;
+static void func_comm(char *buf, int size, const procps_status_t *ps)
+{
+ safe_strncpy(buf, ps->comm, size+1);
}
+static void func_state(char *buf, int size, const procps_status_t *ps)
+{
+ safe_strncpy(buf, ps->state, size+1);
+}
-static void parse_proc_status(char *S, proc_t * P)
+static void func_args(char *buf, int size, const procps_status_t *ps)
{
- char *tmp;
+ read_cmdline(buf, size+1, ps->pid, ps->comm);
+}
- memset(P->cmd, 0, sizeof P->cmd);
- sscanf(S, "Name:\t%15c", P->cmd);
- tmp = strchr(P->cmd, '\n');
- if (tmp)
- *tmp = '\0';
- tmp = strstr(S, "State");
- sscanf(tmp, "State:\t%c", &P->state);
+static void func_pid(char *buf, int size, const procps_status_t *ps)
+{
+ sprintf(buf, "%*u", size, ps->pid);
+}
- P->pid = 0;
- P->ppid = 0;
- tmp = strstr(S, "Pid:");
- if (tmp)
- sscanf(tmp, "Pid:\t%d\n" "PPid:\t%d\n", &P->pid, &P->ppid);
- else
- error_msg("Internal error!");
+static void func_ppid(char *buf, int size, const procps_status_t *ps)
+{
+ sprintf(buf, "%*u", size, ps->ppid);
+}
- /* For busybox, ignoring effective, saved, etc. */
- P->ruid = 0;
- tmp = strstr(S, "Uid:");
- if (tmp)
- sscanf(tmp, "Uid:\t%d", &P->ruid);
- else
- error_msg("Internal error!");
-
- P->vmsize = 0;
- tmp = strstr(S, "VmSize:");
- if (tmp)
- sscanf(tmp, "VmSize:\t%d", &P->vmsize);
-#if 0
- else
- error_msg("Internal error!");
-#endif
+static void func_pgid(char *buf, int size, const procps_status_t *ps)
+{
+ sprintf(buf, "%*u", size, ps->pgid);
}
-extern int ps_main(int argc, char **argv)
+static void put_lu(char *buf, int size, unsigned long u)
{
- proc_t p;
- DIR *dir;
- FILE *file;
- struct dirent *entry;
- char path[32], sbuf[512];
- char uidName[9];
- int len, i, c;
-#ifdef CONFIG_FEATURE_AUTOWIDTH
- struct winsize win = { 0, 0, 0, 0 };
- int terminal_width = TERMINAL_WIDTH;
-#else
-#define terminal_width TERMINAL_WIDTH
+ char buf4[5];
+
+ /* see http://en.wikipedia.org/wiki/Tera */
+ smart_ulltoa4(u, buf4, " mgtpezy")[0] = '\0';
+ sprintf(buf, "%.*s", size, buf4);
+}
+
+static void func_vsz(char *buf, int size, const procps_status_t *ps)
+{
+ put_lu(buf, size, ps->vsz);
+}
+
+static void func_rss(char *buf, int size, const procps_status_t *ps)
+{
+ put_lu(buf, size, ps->rss);
+}
+
+static void func_tty(char *buf, int size, const procps_status_t *ps)
+{
+ buf[0] = '?';
+ buf[1] = '\0';
+ if (ps->tty_major) /* tty field of "0" means "no tty" */
+ snprintf(buf, size+1, "%u,%u", ps->tty_major, ps->tty_minor);
+}
+
+#if ENABLE_FEATURE_PS_ADDITIONAL_COLUMNS
+
+static void func_rgroup(char *buf, int size, const procps_status_t *ps)
+{
+ safe_strncpy(buf, get_cached_groupname(ps->rgid), size+1);
+}
+
+static void func_ruser(char *buf, int size, const procps_status_t *ps)
+{
+ safe_strncpy(buf, get_cached_username(ps->ruid), size+1);
+}
+
+static void func_nice(char *buf, int size, const procps_status_t *ps)
+{
+ sprintf(buf, "%*d", size, ps->niceness);
+}
+
#endif
+#if ENABLE_FEATURE_PS_TIME
+static void func_etime(char *buf, int size, const procps_status_t *ps)
+{
+ /* elapsed time [[dd-]hh:]mm:ss; here only mm:ss */
+ unsigned long mm;
+ unsigned ss;
+
+ mm = ps->start_time / get_kernel_HZ();
+ /* must be after get_kernel_HZ()! */
+ mm = G.seconds_since_boot - mm;
+ ss = mm % 60;
+ mm /= 60;
+ snprintf(buf, size+1, "%3lu:%02u", mm, ss);
+}
+
+static void func_time(char *buf, int size, const procps_status_t *ps)
+{
+ /* cumulative time [[dd-]hh:]mm:ss; here only mm:ss */
+ unsigned long mm;
+ unsigned ss;
+
+ mm = (ps->utime + ps->stime) / get_kernel_HZ();
+ ss = mm % 60;
+ mm /= 60;
+ snprintf(buf, size+1, "%3lu:%02u", mm, ss);
+}
- dir = opendir("/proc");
- if (!dir)
- error_msg_and_die("Can't open /proc");
+#endif
+
+#if ENABLE_SELINUX
+static void func_label(char *buf, int size, const procps_status_t *ps)
+{
+ safe_strncpy(buf, ps->context ? ps->context : "unknown", size+1);
+}
+#endif
-#ifdef CONFIG_FEATURE_AUTOWIDTH
- ioctl(fileno(stdout), TIOCGWINSZ, &win);
- if (win.ws_col > 0)
- terminal_width = win.ws_col - 1;
+/*
+static void func_nice(char *buf, int size, const procps_status_t *ps)
+{
+ ps->???
+}
+
+static void func_pcpu(char *buf, int size, const procps_status_t *ps)
+{
+}
+*/
+
+static const ps_out_t out_spec[] = {
+/* Mandated by http://pubs.opengroup.org/onlinepubs/9699919799/utilities/ps.html: */
+ { 8 , "user" ,"USER" ,func_user ,PSSCAN_UIDGID },
+ { 8 , "group" ,"GROUP" ,func_group ,PSSCAN_UIDGID },
+ { 16 , "comm" ,"COMMAND",func_comm ,PSSCAN_COMM },
+ { MAX_WIDTH , "args" ,"COMMAND",func_args ,PSSCAN_COMM },
+ { 5 , "pid" ,"PID" ,func_pid ,PSSCAN_PID },
+ { 5 , "ppid" ,"PPID" ,func_ppid ,PSSCAN_PPID },
+ { 5 , "pgid" ,"PGID" ,func_pgid ,PSSCAN_PGID },
+#if ENABLE_FEATURE_PS_TIME
+ { sizeof("ELAPSED")-1, "etime" ,"ELAPSED",func_etime ,PSSCAN_START_TIME },
+#endif
+#if ENABLE_FEATURE_PS_ADDITIONAL_COLUMNS
+ { 5 , "nice" ,"NI" ,func_nice ,PSSCAN_NICE },
+ { 8 , "rgroup","RGROUP" ,func_rgroup,PSSCAN_RUIDGID },
+ { 8 , "ruser" ,"RUSER" ,func_ruser ,PSSCAN_RUIDGID },
+// { 5 , "pcpu" ,"%CPU" ,func_pcpu ,PSSCAN_ },
+#endif
+#if ENABLE_FEATURE_PS_TIME
+ { 6 , "time" ,"TIME" ,func_time ,PSSCAN_STIME | PSSCAN_UTIME },
+#endif
+ { 6 , "tty" ,"TT" ,func_tty ,PSSCAN_TTY },
+ { 4 , "vsz" ,"VSZ" ,func_vsz ,PSSCAN_VSZ },
+/* Not mandated, but useful: */
+ { 4 , "stat" ,"STAT" ,func_state ,PSSCAN_STATE },
+ { 4 , "rss" ,"RSS" ,func_rss ,PSSCAN_RSS },
+#if ENABLE_SELINUX
+ { 35 , "label" ,"LABEL" ,func_label ,PSSCAN_CONTEXT },
#endif
+};
- printf(" PID Uid VmSize Stat Command\n");
- while ((entry = readdir(dir)) != NULL) {
- if (!isdigit(*entry->d_name))
+static ps_out_t* new_out_t(void)
+{
+ out = xrealloc_vector(out, 2, out_cnt);
+ return &out[out_cnt++];
+}
+
+static const ps_out_t* find_out_spec(const char *name)
+{
+ unsigned i;
+ char buf[ARRAY_SIZE(out_spec)*7 + 1];
+ char *p = buf;
+
+ for (i = 0; i < ARRAY_SIZE(out_spec); i++) {
+ if (strncmp(name, out_spec[i].name6, 6) == 0)
+ return &out_spec[i];
+ p += sprintf(p, "%.6s,", out_spec[i].name6);
+ }
+ p[-1] = '\0';
+ bb_error_msg_and_die("bad -o argument '%s', supported arguments: %s", name, buf);
+}
+
+static void parse_o(char* opt)
+{
+ ps_out_t* new;
+ // POSIX: "-o is blank- or comma-separated list" (FIXME)
+ char *comma, *equal;
+ while (1) {
+ comma = strchr(opt, ',');
+ equal = strchr(opt, '=');
+ if (comma && (!equal || equal > comma)) {
+ *comma = '\0';
+ *new_out_t() = *find_out_spec(opt);
+ *comma = ',';
+ opt = comma + 1;
continue;
- sprintf(path, "/proc/%s/status", entry->d_name);
- if ((file2str(path, sbuf, sizeof sbuf)) != -1) {
- parse_proc_status(sbuf, &p);
}
+ break;
+ }
+ // opt points to last spec in comma separated list.
+ // This one can have =HEADER part.
+ new = new_out_t();
+ if (equal)
+ *equal = '\0';
+ *new = *find_out_spec(opt);
+ if (equal) {
+ *equal = '=';
+ new->header = equal + 1;
+ // POSIX: the field widths shall be ... at least as wide as
+ // the header text (default or overridden value).
+ // If the header text is null, such as -o user=,
+ // the field width shall be at least as wide as the
+ // default header text
+ if (new->header[0]) {
+ new->width = strlen(new->header);
+ print_header = 1;
+ }
+ } else
+ print_header = 1;
+}
- /* Make some adjustments as needed */
- my_getpwuid(uidName, p.ruid);
+static void alloc_line_buffer(void)
+{
+ int i;
+ int width = 0;
+ for (i = 0; i < out_cnt; i++) {
+ need_flags |= out[i].ps_flags;
+ if (out[i].header[0]) {
+ print_header = 1;
+ }
+ width += out[i].width + 1; /* "FIELD " */
+ if ((int)(width - terminal_width) > 0) {
+ /* The rest does not fit on the screen */
+ //out[i].width -= (width - terminal_width - 1);
+ out_cnt = i + 1;
+ break;
+ }
+ }
+#if ENABLE_SELINUX
+ if (!is_selinux_enabled())
+ need_flags &= ~PSSCAN_CONTEXT;
+#endif
+ buffer = xmalloc(width + 1); /* for trailing \0 */
+}
- sprintf(path, "/proc/%s/cmdline", entry->d_name);
- file = fopen(path, "r");
- if (file == NULL)
- continue;
- i = 0;
- if(p.vmsize == 0)
- len = printf("%5d %-8s %c ", p.pid, uidName, p.state);
- else
- len = printf("%5d %-8s %6d %c ", p.pid, uidName, p.vmsize, p.state);
- while (((c = getc(file)) != EOF) && (i < (terminal_width-len))) {
- i++;
- if (c == '\0')
- c = ' ';
- putc(c, stdout);
+static void format_header(void)
+{
+ int i;
+ ps_out_t* op;
+ char *p;
+
+ if (!print_header)
+ return;
+ p = buffer;
+ i = 0;
+ if (out_cnt) {
+ while (1) {
+ op = &out[i];
+ if (++i == out_cnt) /* do not pad last field */
+ break;
+ p += sprintf(p, "%-*s ", op->width, op->header);
}
- fclose(file);
- if (i == 0)
- printf("[%s]", p.cmd);
- putchar('\n');
+ strcpy(p, op->header);
}
- closedir(dir);
- return EXIT_SUCCESS;
+ printf("%.*s\n", terminal_width, buffer);
}
+static void format_process(const procps_status_t *ps)
+{
+ int i, len;
+ char *p = buffer;
+ i = 0;
+ if (out_cnt) while (1) {
+ out[i].f(p, out[i].width, ps);
+ // POSIX: Any field need not be meaningful in all
+ // implementations. In such a case a hyphen ( '-' )
+ // should be output in place of the field value.
+ if (!p[0]) {
+ p[0] = '-';
+ p[1] = '\0';
+ }
+ len = strlen(p);
+ p += len;
+ len = out[i].width - len + 1;
+ if (++i == out_cnt) /* do not pad last field */
+ break;
+ p += sprintf(p, "%*s", len, "");
+ }
+ printf("%.*s\n", terminal_width, buffer);
+}
+
+#if ENABLE_SELINUX
+# define SELINUX_O_PREFIX "label,"
+# define DEFAULT_O_STR (SELINUX_O_PREFIX "pid,user" IF_FEATURE_PS_TIME(",time") ",args")
+#else
+# define DEFAULT_O_STR ("pid,user" IF_FEATURE_PS_TIME(",time") ",args")
+#endif
+
+int ps_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
+int ps_main(int argc UNUSED_PARAM, char **argv)
+{
+ procps_status_t *p;
+ llist_t* opt_o = NULL;
+ char default_o[sizeof(DEFAULT_O_STR)];
+ int opt;
+ enum {
+ OPT_Z = (1 << 0),
+ OPT_o = (1 << 1),
+ OPT_a = (1 << 2),
+ OPT_A = (1 << 3),
+ OPT_d = (1 << 4),
+ OPT_e = (1 << 5),
+ OPT_f = (1 << 6),
+ OPT_l = (1 << 7),
+ OPT_T = (1 << 8) * ENABLE_FEATURE_SHOW_THREADS,
+ };
+
+ INIT_G();
+
+ // POSIX:
+ // -a Write information for all processes associated with terminals
+ // Implementations may omit session leaders from this list
+ // -A Write information for all processes
+ // -d Write information for all processes, except session leaders
+ // -e Write information for all processes (equivalent to -A)
+ // -f Generate a full listing
+ // -l Generate a long listing
+ // -o col1,col2,col3=header
+ // Select which columns to display
+ /* We allow (and ignore) most of the above. FIXME.
+ * -T is picked for threads (POSIX hasn't standardized it).
+ * procps v3.2.7 supports -T and shows tids as SPID column,
+ * it also supports -L where it shows tids as LWP column.
+ */
+ opt_complementary = "o::";
+ opt = getopt32(argv, "Zo:aAdefl"IF_FEATURE_SHOW_THREADS("T"), &opt_o);
+ if (opt_o) {
+ do {
+ parse_o(llist_pop(&opt_o));
+ } while (opt_o);
+ } else {
+ /* Below: parse_o() needs char*, NOT const char*,
+ * can't pass it constant string. Need to make a copy first.
+ */
+#if ENABLE_SELINUX
+ if (!(opt & OPT_Z) || !is_selinux_enabled()) {
+ /* no -Z or no SELinux: do not show LABEL */
+ strcpy(default_o, DEFAULT_O_STR + sizeof(SELINUX_O_PREFIX)-1);
+ } else
+#endif
+ {
+ strcpy(default_o, DEFAULT_O_STR);
+ }
+ parse_o(default_o);
+ }
+#if ENABLE_FEATURE_SHOW_THREADS
+ if (opt & OPT_T)
+ need_flags |= PSSCAN_TASKS;
+#endif
-#else /* CONFIG_FEATURE_USE_DEVPS_PATCH */
+ /* Was INT_MAX, but some libc's go belly up with printf("%.*s")
+ * and such large widths */
+ terminal_width = MAX_WIDTH;
+ if (isatty(1)) {
+ get_terminal_width_height(0, &terminal_width, NULL);
+ if (--terminal_width > MAX_WIDTH)
+ terminal_width = MAX_WIDTH;
+ }
+ alloc_line_buffer();
+ format_header();
+ p = NULL;
+ while ((p = procps_scan(p, need_flags)) != NULL) {
+ format_process(p);
+ }
+
+ return EXIT_SUCCESS;
+}
-/* The following is the second ps implementation --
- * this one uses the nifty new devps kernel device.
- */
-#include <linux/devps.h> /* For Erik's nifty devps device driver */
+#else /* !ENABLE_DESKTOP */
-extern int ps_main(int argc, char **argv)
+int ps_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
+int ps_main(int argc UNUSED_PARAM, char **argv UNUSED_PARAM)
{
- char device[] = "/dev/ps";
- int i, j, len, fd;
- pid_t num_pids;
- pid_t* pid_array = NULL;
- struct pid_info info;
- char uidName[9];
-#ifdef CONFIG_FEATURE_AUTOWIDTH
- struct winsize win = { 0, 0, 0, 0 };
- int terminal_width = TERMINAL_WIDTH;
-#else
-#define terminal_width TERMINAL_WIDTH
+ procps_status_t *p;
+ int psscan_flags = PSSCAN_PID | PSSCAN_UIDGID
+ | PSSCAN_STATE | PSSCAN_VSZ | PSSCAN_COMM;
+ unsigned terminal_width IF_NOT_FEATURE_PS_WIDE(= 79);
+ enum {
+ OPT_Z = (1 << 0) * ENABLE_SELINUX,
+ OPT_T = (1 << ENABLE_SELINUX) * ENABLE_FEATURE_SHOW_THREADS,
+ OPT_l = (1 << ENABLE_SELINUX) * (1 << ENABLE_FEATURE_SHOW_THREADS) * ENABLE_FEATURE_PS_LONG,
+ };
+#if ENABLE_FEATURE_PS_LONG
+ time_t now = now;
+ unsigned long uptime;
#endif
-
- if (argc > 1 && **(argv + 1) == '-')
- show_usage();
-
- /* open device */
- fd = open(device, O_RDONLY);
- if (fd < 0)
- perror_msg_and_die( "open failed for `%s'", device);
-
- /* Find out how many processes there are */
- if (ioctl (fd, DEVPS_GET_NUM_PIDS, &num_pids)<0)
- perror_msg_and_die( "\nDEVPS_GET_PID_LIST");
-
- /* Allocate some memory -- grab a few extras just in case
- * some new processes start up while we wait. The kernel will
- * just ignore any extras if we give it too many, and will trunc.
- * the list if we give it too few. */
- pid_array = (pid_t*) xcalloc( num_pids+10, sizeof(pid_t));
- pid_array[0] = num_pids+10;
-
- /* Now grab the pid list */
- if (ioctl (fd, DEVPS_GET_PID_LIST, pid_array)<0)
- perror_msg_and_die("\nDEVPS_GET_PID_LIST");
-
-#ifdef CONFIG_FEATURE_AUTOWIDTH
- ioctl(fileno(stdout), TIOCGWINSZ, &win);
- if (win.ws_col > 0)
- terminal_width = win.ws_col - 1;
+ /* If we support any options, parse argv */
+#if ENABLE_SELINUX || ENABLE_FEATURE_SHOW_THREADS || ENABLE_FEATURE_PS_WIDE || ENABLE_FEATURE_PS_LONG
+ int opts = 0;
+# if ENABLE_FEATURE_PS_WIDE
+ /* -w is a bit complicated */
+ int w_count = 0;
+ opt_complementary = "-:ww";
+ opts = getopt32(argv, IF_SELINUX("Z")IF_FEATURE_SHOW_THREADS("T")IF_FEATURE_PS_LONG("l")
+ "w", &w_count);
+ /* if w is given once, GNU ps sets the width to 132,
+ * if w is given more than once, it is "unlimited"
+ */
+ if (w_count) {
+ terminal_width = (w_count == 1) ? 132 : MAX_WIDTH;
+ } else {
+ get_terminal_width_height(0, &terminal_width, NULL);
+ /* Go one less... */
+ if (--terminal_width > MAX_WIDTH)
+ terminal_width = MAX_WIDTH;
+ }
+# else
+ /* -w is not supported, only -Z and/or -T */
+ opt_complementary = "-";
+ opts = getopt32(argv, IF_SELINUX("Z")IF_FEATURE_SHOW_THREADS("T")IF_FEATURE_PS_LONG("l"));
+# endif
+
+# if ENABLE_SELINUX
+ if ((opts & OPT_Z) && is_selinux_enabled()) {
+ psscan_flags = PSSCAN_PID | PSSCAN_CONTEXT
+ | PSSCAN_STATE | PSSCAN_COMM;
+ puts(" PID CONTEXT STAT COMMAND");
+ } else
+# endif
+ if (opts & OPT_l) {
+ psscan_flags = PSSCAN_STATE | PSSCAN_UIDGID | PSSCAN_PID | PSSCAN_PPID
+ | PSSCAN_TTY | PSSCAN_STIME | PSSCAN_UTIME | PSSCAN_COMM
+ | PSSCAN_VSZ | PSSCAN_RSS;
+/* http://pubs.opengroup.org/onlinepubs/9699919799/utilities/ps.html
+ * mandates for -l:
+ * -F Flags (?)
+ * S State
+ * UID,PID,PPID
+ * -C CPU usage
+ * -PRI The priority of the process; higher numbers mean lower priority
+ * -NI Nice value
+ * -ADDR The address of the process (?)
+ * SZ The size in blocks of the core image
+ * -WCHAN The event for which the process is waiting or sleeping
+ * TTY
+ * TIME The cumulative execution time
+ * CMD
+ * We don't show fields marked with '-'.
+ * We show VSZ and RSS instead of SZ.
+ * We also show STIME (standard says that -f shows it, -l doesn't).
+ */
+ puts("S UID PID PPID VSZ RSS TTY STIME TIME CMD");
+# if ENABLE_FEATURE_PS_LONG
+ now = time(NULL);
+ uptime = get_uptime();
+# endif
+ }
+ else {
+ puts(" PID USER VSZ STAT COMMAND");
+ }
+ if (opts & OPT_T) {
+ psscan_flags |= PSSCAN_TASKS;
+ }
#endif
- /* Print up a ps listing */
- printf(" PID Uid Stat Command\n");
-
- for (i=1; i<pid_array[0] ; i++) {
- info.pid = pid_array[i];
-
- if (ioctl (fd, DEVPS_GET_PID_INFO, &info)<0)
- perror_msg_and_die("\nDEVPS_GET_PID_INFO");
-
- /* Make some adjustments as needed */
- my_getpwuid(uidName, info.euid);
-
- if(p.vmsize == 0)
- len = printf("%5d %-8s %c ", p.pid, uidName, p.state);
- else
- len = printf("%5d %-8s %6d %c ", p.pid, uidName, p.vmsize, p.state);
- if (strlen(info.command_line) > 1) {
- for( j=0; j<(sizeof(info.command_line)-1) && j < (terminal_width-len); j++) {
- if (*(info.command_line+j) == '\0' && *(info.command_line+j+1) != '\0') {
- *(info.command_line+j) = ' ';
+ p = NULL;
+ while ((p = procps_scan(p, psscan_flags)) != NULL) {
+ int len;
+#if ENABLE_SELINUX
+ if (psscan_flags & PSSCAN_CONTEXT) {
+ len = printf("%5u %-32.32s %s ",
+ p->pid,
+ p->context ? p->context : "unknown",
+ p->state);
+ } else
+#endif
+ {
+ char buf6[6];
+ smart_ulltoa5(p->vsz, buf6, " mgtpezy")[0] = '\0';
+#if ENABLE_FEATURE_PS_LONG
+ if (opts & OPT_l) {
+ char bufr[6], stime_str[6];
+ char tty[2 * sizeof(int)*3 + 2];
+ char *endp;
+ unsigned sut = (p->stime + p->utime) / 100;
+ unsigned elapsed = uptime - (p->start_time / 100);
+ time_t start = now - elapsed;
+ struct tm *tm = localtime(&start);
+
+ smart_ulltoa5(p->rss, bufr, " mgtpezy")[0] = '\0';
+
+ if (p->tty_major == 136)
+ /* It should be pts/N, not ptsN, but N > 9
+ * will overflow field width...
+ */
+ endp = stpcpy(tty, "pts");
+ else
+ if (p->tty_major == 4) {
+ endp = stpcpy(tty, "tty");
+ if (p->tty_minor >= 64) {
+ p->tty_minor -= 64;
+ *endp++ = 'S';
+ }
}
+ else
+ endp = tty + sprintf(tty, "%d:", p->tty_major);
+ strcpy(endp, utoa(p->tty_minor));
+
+ strftime(stime_str, 6, (elapsed >= (24 * 60 * 60)) ? "%b%d" : "%H:%M", tm);
+ stime_str[5] = '\0';
+ // S UID PID PPID VSZ RSS TTY STIME TIME CMD
+ len = printf("%c %5u %5u %5u %5s %5s %-5s %s %02u:%02u:%02u ",
+ p->state[0], p->uid, p->pid, p->ppid, buf6, bufr, tty,
+ stime_str, sut / 3600, (sut % 3600) / 60, sut % 60);
+ } else
+#endif
+ {
+ const char *user = get_cached_username(p->uid);
+ len = printf("%5u %-8.8s %s %s ",
+ p->pid, user, buf6, p->state);
}
- *(info.command_line+j) = '\0';
- puts(info.command_line);
- } else {
- printf("[%s]\n", info.name);
}
- }
-
- /* Free memory */
- free( pid_array);
- /* close device */
- if (close (fd) != 0)
- perror_msg_and_die("close failed for `%s'", device);
-
- exit (0);
+ {
+ int sz = terminal_width - len;
+ char buf[sz + 1];
+ read_cmdline(buf, sz, p->pid, p->comm);
+ puts(buf);
+ }
+ }
+ if (ENABLE_FEATURE_CLEAN_UP)
+ clear_username_cache();
+ return EXIT_SUCCESS;
}
-#endif /* CONFIG_FEATURE_USE_DEVPS_PATCH */
-
+#endif /* !ENABLE_DESKTOP */
projects / platform / upstream / busybox.git / blobdiff