* 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.
*/
+//config:config PS
+//config: bool "ps (11 kb)"
+//config: default y
+//config: help
+//config: ps gives a snapshot of the current processes.
+//config:
+//config:config FEATURE_PS_WIDE
+//config: bool "Enable wide output (-w)"
+//config: default y
+//config: depends on (PS || MINIPS) && !DESKTOP
+//config: help
+//config: Support argument 'w' for wide output.
+//config: If given once, 132 chars are printed, and if given more
+//config: than once, the length is unlimited.
+//config:
+//config:config FEATURE_PS_LONG
+//config: bool "Enable long output (-l)"
+//config: default y
+//config: depends on (PS || MINIPS) && !DESKTOP
+//config: help
+//config: Support argument 'l' for long output.
+//config: Adds fields PPID, RSS, START, TIME & TTY
+//config:
+//config:config FEATURE_PS_TIME
+//config: bool "Enable -o time and -o etime specifiers"
+//config: default y
+//config: depends on (PS || MINIPS) && DESKTOP
+//config: select PLATFORM_LINUX
+//config:
+//config:config FEATURE_PS_UNUSUAL_SYSTEMS
+//config: bool "Support Linux prior to 2.4.0 and non-ELF systems"
+//config: default n
+//config: depends on FEATURE_PS_TIME
+//config: help
+//config: Include support for measuring HZ on old kernels and non-ELF systems
+//config: (if you are on Linux 2.4.0+ and use ELF, you don't need this)
+//config:
+//config:config FEATURE_PS_ADDITIONAL_COLUMNS
+//config: bool "Enable -o rgroup, -o ruser, -o nice specifiers"
+//config: default y
+//config: depends on (PS || MINIPS) && DESKTOP
+
+// APPLET_NOEXEC:name main location suid_type help
+//applet:IF_PS( APPLET_NOEXEC(ps, ps, BB_DIR_BIN, BB_SUID_DROP, ps))
+//applet:IF_MINIPS(APPLET_NOEXEC(minips, ps, BB_DIR_BIN, BB_SUID_DROP, ps))
+
+//kbuild:lib-$(CONFIG_PS) += ps.o
+//kbuild:lib-$(CONFIG_MINIPS) += ps.o
+
+//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"
+#include "common_bufsiz.h"
+#ifdef __linux__
+# include <sys/sysinfo.h>
+#endif
+
+/* Absolute maximum on output line length */
+enum { MAX_WIDTH = 2*1024 };
-#include "busybox.h"
+#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
+/* 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
+# if ENABLE_FEATURE_PS_UNUSUAL_SYSTEMS || !defined(__linux__)
+ unsigned kernel_HZ;
+# endif
+ 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 INIT_G() do { setup_common_bufsiz(); } while (0)
+
+#if ENABLE_FEATURE_PS_TIME
+# if ENABLE_FEATURE_PS_UNUSUAL_SYSTEMS || !defined(__linux__)
+# define get_kernel_HZ() (G.kernel_HZ)
+# else
+ /* non-ancient Linux standardized on 100 for "times" freq */
+# define get_kernel_HZ() ((unsigned)100)
+# endif
+#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)
{
- buf[0] = '\0';
- if (ps->cmd)
- safe_strncpy(buf, ps->cmd, size+1);
- else if (size >= 2)
- snprintf(buf, size+1, "[%.*s]", size-2, ps->comm);
+ read_cmdline(buf, size+1, ps->pid, ps->comm);
}
static void func_pid(char *buf, int size, const procps_status_t *ps)
{
- snprintf(buf, size+1, "%*u", size, ps->pid);
+ sprintf(buf, "%*u", size, ps->pid);
}
static void func_ppid(char *buf, int size, const procps_status_t *ps)
{
- snprintf(buf, size+1, "%*u", size, ps->ppid);
+ sprintf(buf, "%*u", size, ps->ppid);
}
static void func_pgid(char *buf, int size, const procps_status_t *ps)
{
- snprintf(buf, size+1, "%*u", size, ps->pgid);
+ sprintf(buf, "%*u", size, ps->pgid);
}
-static void func_vsz(char *buf, int size, const procps_status_t *ps)
+static void func_sid(char *buf, int size, const procps_status_t *ps)
{
- char buf5[5];
- smart_ulltoa5( ((unsigned long long)ps->vsz) << 10, buf5);
- snprintf(buf, size+1, "%.*s", size, buf5);
+ sprintf(buf, "%*u", size, ps->sid);
}
-/*
-void func_nice(char *buf, int size, const procps_status_t *ps)
+static void put_lu(char *buf, int size, unsigned long u)
{
- ps->???
+ char buf4[5];
+
+ /* see http://en.wikipedia.org/wiki/Tera */
+ smart_ulltoa4(u, buf4, " mgtpezy")[0] = '\0';
+ sprintf(buf, "%.*s", size, buf4);
}
-void func_etime(char *buf, int size, const procps_status_t *ps)
+static void func_vsz(char *buf, int size, const procps_status_t *ps)
{
- elapled time [[dd-]hh:]mm:ss
+ put_lu(buf, size, ps->vsz);
}
-void func_time(char *buf, int size, const procps_status_t *ps)
+static void func_rss(char *buf, int size, const procps_status_t *ps)
{
- cumulative time [[dd-]hh:]mm:ss
+ put_lu(buf, size, ps->rss);
}
-void func_pcpu(char *buf, int size, const procps_status_t *ps)
+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);
}
-void func_tty(char *buf, int size, const procps_status_t *ps)
+#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
-typedef struct {
- char name[8];
- const char *header;
- void (*f)(char *buf, int size, const procps_status_t *ps);
- int ps_flags;
- int width;
-} ps_out_t;
+#if ENABLE_FEATURE_PS_TIME
+static void format_time(char *buf, int size, unsigned long tt)
+{
+ unsigned ff;
-static const ps_out_t out_spec[] = {
-// Mandated by POSIX:
- { "user" ,"USER" ,func_user ,PSSCAN_UIDGID,8 },
- { "comm" ,"COMMAND",func_comm ,PSSCAN_COMM ,16 },
- { "args" ,"COMMAND",func_args ,PSSCAN_CMD|PSSCAN_COMM,256 },
- { "pid" ,"PID" ,func_pid ,PSSCAN_PID ,5 },
- { "ppid" ,"PPID" ,func_ppid ,PSSCAN_PPID ,5 },
- { "pgid" ,"PGID" ,func_pgid ,PSSCAN_PGID ,5 },
-// { "etime" ,"ELAPSED",func_etime ,PSSCAN_ ,sizeof("ELAPSED")-1 },
-// { "group" ,"GROUP" ,func_group ,PSSCAN_UIDGID,sizeof("GROUP" )-1 },
-// { "nice" ,"NI" ,func_nice ,PSSCAN_ ,sizeof("NI" )-1 },
-// { "pcpu" ,"%CPU" ,func_pcpu ,PSSCAN_ ,sizeof("%CPU" )-1 },
-// { "rgroup","RGROUP" ,func_rgroup,PSSCAN_UIDGID,sizeof("RGROUP" )-1 },
-// { "ruser" ,"RUSER" ,func_ruser ,PSSCAN_UIDGID,sizeof("RUSER" )-1 },
-// { "time" ,"TIME" ,func_time ,PSSCAN_ ,sizeof("TIME" )-1 },
-// { "tty" ,"TT" ,func_tty ,PSSCAN_ ,sizeof("TT" )-1 },
- { "vsz" ,"VSZ" ,func_vsz ,PSSCAN_VSZ ,4 },
-// Not mandated by POSIX:
-// { "rss" ,"RSS" ,func_rss ,PSSCAN_RSS ,4 },
-};
+ /* Used to show "14453:50" if tt is large. Ugly.
+ * procps-ng 3.3.10 uses "[[dd-]hh:]mm:ss" format.
+ * TODO: switch to that?
+ */
-#define VEC_SIZE(v) ( sizeof(v) / sizeof((v)[0]) )
+ /* Formatting for 5-char TIME column.
+ * NB: "size" is not always 5: ELAPSED is wider (7),
+ * not taking advantage of that (yet?).
+ */
+ ff = tt % 60;
+ tt /= 60;
+ if (tt < 60) {
+ snprintf(buf, size+1, "%2u:%02u", (unsigned)tt, ff);
+ return;
+ }
+ ff = tt % 60;
+ tt /= 60;
+ if (tt < 24) {
+ snprintf(buf, size+1, "%2uh%02u", (unsigned)tt, ff);
+ return;
+ }
+ ff = tt % 24;
+ tt /= 24;
+ if (tt < 100) {
+ snprintf(buf, size+1, "%2ud%02u", (unsigned)tt, ff);
+ return;
+ }
+ snprintf(buf, size+1, "%4lud", tt);
+}
+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;
+
+ mm = ps->start_time / get_kernel_HZ();
+ mm = G.seconds_since_boot - mm;
+ format_time(buf, size, mm);
+}
+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;
+
+ mm = (ps->utime + ps->stime) / get_kernel_HZ();
+ format_time(buf, size, mm);
+}
+#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
-static ps_out_t* out;
-static int out_cnt;
-static int print_header;
-static int ps_flags;
-static char *buffer;
-static unsigned terminal_width;
+/*
+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
+ { 5 , "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: */
+ { 5 , "sid" ,"SID" ,func_sid ,PSSCAN_SID },
+ { 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)
{
- int i = out_cnt++;
- out = xrealloc(out, out_cnt * sizeof(*out));
- return &out[i];
+ out = xrealloc_vector(out, 2, out_cnt);
+ return &out[out_cnt++];
}
static const ps_out_t* find_out_spec(const char *name)
{
- int i;
- for (i = 0; i < VEC_SIZE(out_spec); i++) {
- if (!strcmp(name, out_spec[i].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);
}
- bb_error_msg_and_die("bad -o argument '%s'", name);
+ p[-1] = '\0';
+ bb_error_msg_and_die("bad -o argument '%s', supported arguments: %s", name, buf);
}
static void parse_o(char* opt)
}
break;
}
+ // opt points to last spec in comma separated list.
+ // This one can have =HEADER part.
new = new_out_t();
if (equal)
*equal = '\0';
print_header = 1;
}
-static void post_process(void)
+static void alloc_line_buffer(void)
{
int i;
int width = 0;
for (i = 0; i < out_cnt; i++) {
- ps_flags |= out[i].ps_flags;
+ 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 */
}
{
int i;
ps_out_t* op;
- char *p = buffer;
+ char *p;
+
if (!print_header)
return;
+ p = buffer;
i = 0;
if (out_cnt) {
while (1) {
len = out[i].width - len + 1;
if (++i == out_cnt) /* do not pad last field */
break;
- p += sprintf(p, "%*s", len, "");
+ p += sprintf(p, "%*s", len, " "); /* " ", not "", to ensure separation of fields */
}
printf("%.*s\n", terminal_width, buffer);
}
-/* Cannot be const: parse_o() will choke */
-static char default_o[] = "pid,user" /* TODO: ,vsz,stat */ ",args";
+#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);
-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)
{
procps_status_t *p;
llist_t* opt_o = NULL;
+ char default_o[sizeof(DEFAULT_O_STR)];
+#if ENABLE_SELINUX || ENABLE_FEATURE_SHOW_THREADS
+ int opt;
+#endif
+ 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();
+#if ENABLE_FEATURE_PS_TIME
+ G.seconds_since_boot = get_uptime();
+# if ENABLE_FEATURE_PS_UNUSUAL_SYSTEMS || !defined(__linux__)
+ G.kernel_HZ = bb_clk_tck(); /* this is sysconf(_SC_CLK_TCK) */
+# endif
+#endif
// 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.)
+ // -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 distplay
- /* We allow (and ignore) most of the above. FIXME */
- opt_complementary = "o::";
- getopt32(argc, argv, "o:aAdefl", &opt_o);
+ // 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.
+ */
+#if ENABLE_SELINUX || ENABLE_FEATURE_SHOW_THREADS
+ opt =
+#endif
+ getopt32(argv, "Zo:*aAdefl"IF_FEATURE_SHOW_THREADS("T"), &opt_o);
+
if (opt_o) {
- opt_o = llist_rev(opt_o);
do {
- parse_o(opt_o->data);
- opt_o = opt_o->link;
+ parse_o(llist_pop(&opt_o));
} while (opt_o);
- } else
+ } 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);
- post_process();
+ }
+#if ENABLE_FEATURE_SHOW_THREADS
+ if (opt & OPT_T)
+ need_flags |= PSSCAN_TASKS;
+#endif
- terminal_width = INT_MAX;
+ /* 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(1, &terminal_width, NULL);
- terminal_width--;
+ terminal_width = get_terminal_width(0);
+ if (--terminal_width > MAX_WIDTH)
+ terminal_width = MAX_WIDTH;
}
+ alloc_line_buffer();
format_header();
p = NULL;
- while ((p = procps_scan(p, ps_flags))) {
+ while ((p = procps_scan(p, need_flags)) != NULL) {
format_process(p);
}
#else /* !ENABLE_DESKTOP */
-int ps_main(int argc, char **argv);
-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)
{
- procps_status_t *p = NULL;
- int i, len;
- SKIP_SELINUX(const) int use_selinux = 0;
- USE_SELINUX(security_context_t sid = NULL;)
-#if !ENABLE_FEATURE_PS_WIDE
- enum { terminal_width = 79 };
-#else
- int terminal_width;
- int w_count = 0;
+ 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; /* for compiler */
+ unsigned long uptime = uptime;
#endif
-
-#if ENABLE_FEATURE_PS_WIDE || ENABLE_SELINUX
-#if ENABLE_FEATURE_PS_WIDE
- opt_complementary = "-:ww";
- USE_SELINUX(i =) getopt32(argc, argv, USE_SELINUX("Z") "w", &w_count);
+ /* 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;
+ make_all_argv_opts(argv);
+ opts = getopt32(argv, "^"
+ IF_SELINUX("Z")IF_FEATURE_SHOW_THREADS("T")IF_FEATURE_PS_LONG("l")"w"
+ "\0" "ww",
+ &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);
+ terminal_width = get_terminal_width(0);
/* Go one less... */
- terminal_width--;
+ if (--terminal_width > MAX_WIDTH)
+ terminal_width = MAX_WIDTH;
+ }
+# else
+ /* -w is not supported, only -Z and/or -T */
+ make_all_argv_opts(argv);
+ 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;
}
-#else /* only ENABLE_SELINUX */
- i = getopt32(argc, argv, "Z");
-#endif
-#if ENABLE_SELINUX
- if ((i & 1) && is_selinux_enabled())
- use_selinux = 1;
#endif
-#endif /* ENABLE_FEATURE_PS_WIDE || ENABLE_SELINUX */
- if (use_selinux)
- puts(" PID Context Stat Command");
- else
- puts(" PID Uid VSZ Stat Command");
-
- while ((p = procps_scan(p, 0
- | PSSCAN_PID
- | PSSCAN_UIDGID
- | PSSCAN_STATE
- | PSSCAN_VSZ
- | PSSCAN_CMD
- ))) {
- char *namecmd = p->cmd;
+ p = NULL;
+ while ((p = procps_scan(p, psscan_flags)) != NULL) {
+ int len;
#if ENABLE_SELINUX
- if (use_selinux) {
- char sbuf[128];
- len = sizeof(sbuf);
-
- if (is_selinux_enabled()) {
- if (getpidcon(p->pid, &sid) < 0)
- sid = NULL;
- }
-
- if (sid) {
- /* I assume sid initialized with NULL */
- len = strlen(sid) + 1;
- safe_strncpy(sbuf, sid, len);
- freecon(sid);
- sid = NULL;
- } else {
- safe_strncpy(sbuf, "unknown", 7);
- }
- len = printf("%5u %-32s %s ", p->pid, sbuf, p->state);
+ if (psscan_flags & PSSCAN_CONTEXT) {
+ len = printf("%5u %-32.32s %s ",
+ p->pid,
+ p->context ? p->context : "unknown",
+ p->state);
} else
#endif
{
- const char *user = get_cached_username(p->uid);
- if (p->vsz == 0)
- len = printf("%5u %-8s %s ",
- p->pid, user, p->state);
- else
- len = printf("%5u %-8s %6ld %s ",
- p->pid, user, p->vsz, p->state);
+ 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);
+ }
}
- i = terminal_width-len;
-
- if (namecmd && namecmd[0]) {
- if (i < 0)
- i = 0;
- if (strlen(namecmd) > (size_t)i)
- namecmd[i] = 0;
- puts(namecmd);
- } else {
- namecmd = p->comm;
- 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;
+ if (sz >= 0) {
+ char buf[sz + 1];
+ read_cmdline(buf, sz, p->pid, p->comm);
+ puts(buf);
+ }
}
}
if (ENABLE_FEATURE_CLEAN_UP)
return EXIT_SUCCESS;
}
-#endif /* ENABLE_DESKTOP */
+#endif /* !ENABLE_DESKTOP */
projects / oweals / busybox.git / blobdiff