* Mini ps implementation(s) for busybox
*
* 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>
*
- * Licensed under the GPL version 2, see the file LICENSE in this tarball.
+ * Licensed under GPLv2, see file LICENSE in this source tree.
*/
-#include "busybox.h"
+//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"
-int ps_main(int argc, char **argv)
+#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)
{
- procps_status_t * p;
- int i, len;
+#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;
+
+ while (*ep++)
+ continue;
+ while (*ep) {
+ if (ep[0] == findme) {
+ return ep[1];
+ }
+ ep += 2;
+ }
+ return -1;
+}
+
+#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;
+
+ /* 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();
+
+ G.seconds_since_boot = get_uptime();
+
+ 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 void func_group(char *buf, int size, const procps_status_t *ps)
+{
+ safe_strncpy(buf, get_cached_groupname(ps->gid), size+1);
+}
+
+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 func_args(char *buf, int size, const procps_status_t *ps)
+{
+ read_cmdline(buf, size+1, ps->pid, ps->comm);
+}
+
+static void func_pid(char *buf, int size, const procps_status_t *ps)
+{
+ sprintf(buf, "%*u", size, ps->pid);
+}
+
+static void func_ppid(char *buf, int size, const procps_status_t *ps)
+{
+ sprintf(buf, "%*u", size, ps->ppid);
+}
+
+static void func_pgid(char *buf, int size, const procps_status_t *ps)
+{
+ sprintf(buf, "%*u", size, ps->pgid);
+}
+
+static void put_lu(char *buf, int size, unsigned long u)
+{
+ 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);
+}
+
+#endif
#if ENABLE_SELINUX
- int use_selinux = 0;
- security_context_t sid = NULL;
+static void func_label(char *buf, int size, const procps_status_t *ps)
+{
+ safe_strncpy(buf, ps->context ? ps->context : "unknown", size+1);
+}
#endif
-#if ENABLE_FEATURE_PS_WIDE
- int terminal_width;
- int w_count = 0;
+/*
+static void func_nice(char *buf, int size, const procps_status_t *ps)
+{
+ ps->???
+}
- opt_complementary = "-:ww";
+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
+};
+
+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;
+ }
+ 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;
+}
+
+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 */
+}
+
+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);
+ }
+ strcpy(p, op->header);
+ }
+ 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 terminal_width 79
+# define DEFAULT_O_STR ("pid,user" IF_FEATURE_PS_TIME(",time") ",args")
#endif
-#if ENABLE_FEATURE_PS_WIDE || ENABLE_SELINUX
- /* handle arguments */
-#if ENABLE_FEATURE_PS_WIDE && ENABLE_SELINUX
- i = getopt32(argc, argv, "wc", &w_count);
-#elif ENABLE_FEATURE_PS_WIDE && !ENABLE_SELINUX
- getopt32(argc, argv, "w", &w_count);
-#else /* !ENABLE_FEATURE_PS_WIDE && ENABLE_SELINUX */
- i = getopt32(argc, argv, "c");
+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
-#if ENABLE_FEATURE_PS_WIDE
+
+ /* 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;
+}
+
+
+#else /* !ENABLE_DESKTOP */
+
+
+int ps_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
+int ps_main(int argc UNUSED_PARAM, char **argv UNUSED_PARAM)
+{
+ 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 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 : INT_MAX;
+ terminal_width = (w_count == 1) ? 132 : MAX_WIDTH;
} else {
- get_terminal_width_height(1, &terminal_width, NULL);
+ get_terminal_width_height(0, &terminal_width, NULL);
/* Go one less... */
- terminal_width--;
+ 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
-#if ENABLE_SELINUX
- if ((i & (1+ENABLE_FEATURE_PS_WIDE)) && is_selinux_enabled())
- use_selinux = 1;
-#endif
-#endif /* ENABLE_FEATURE_PS_WIDE || ENABLE_SELINUX */
+ p = NULL;
+ while ((p = procps_scan(p, psscan_flags)) != NULL) {
+ int len;
#if ENABLE_SELINUX
- if (use_selinux)
- puts(" PID Context Stat Command");
- else
+ if (psscan_flags & PSSCAN_CONTEXT) {
+ len = printf("%5u %-32.32s %s ",
+ p->pid,
+ p->context ? p->context : "unknown",
+ p->state);
+ } else
#endif
- puts(" PID Uid VmSize Stat Command");
+ {
+ 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);
- while ((p = procps_scan(1)) != 0) {
- char *namecmd = p->cmd;
-#if ENABLE_SELINUX
- if (use_selinux) {
- char sbuf[128];
- len = sizeof(sbuf);
+ smart_ulltoa5(p->rss, bufr, " mgtpezy")[0] = '\0';
- if (is_selinux_enabled()) {
- if (getpidcon(p->pid,&sid) < 0)
- sid = NULL;
- }
+ 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));
- if (sid) {
- /* I assume sid initilized with NULL */
- len = strlen(sid)+1;
- safe_strncpy(sbuf, sid, len);
- freecon(sid);
- sid = NULL;
- } else {
- safe_strncpy(sbuf, "unknown", 7);
+ 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);
}
- len = printf("%5d %-32s %s ", p->pid, sbuf, p->state);
}
- else
-#endif
- if (p->rss == 0)
- len = printf("%5d %-8s %s ", p->pid, p->user, p->state);
- else
- len = printf("%5d %-8s %6ld %s ", p->pid, p->user, p->rss, p->state);
-
- i = terminal_width-len;
-
- if (namecmd && namecmd[0]) {
- if (i < 0)
- i = 0;
- if (strlen(namecmd) > (size_t)i)
- namecmd[i] = 0;
- printf("%s\n", namecmd);
- } else {
- namecmd = p->short_cmd;
- if (i < 2)
- i = 2;
- if (strlen(namecmd) > ((size_t)i-2))
- namecmd[i-2] = 0;
- printf("[%s]\n", namecmd);
+
+ {
+ int sz = terminal_width - len;
+ char buf[sz + 1];
+ read_cmdline(buf, sz, p->pid, p->comm);
+ puts(buf);
}
- /* no check needed, but to make valgrind happy.. */
- if (ENABLE_FEATURE_CLEAN_UP && p->cmd)
- free(p->cmd);
}
+ if (ENABLE_FEATURE_CLEAN_UP)
+ clear_username_cache();
return EXIT_SUCCESS;
}
+
+#endif /* !ENABLE_DESKTOP */
projects / platform / upstream / busybox.git / blobdiff