*
* 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>
+ * (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.
*/
+//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: "\nOptions:"
+//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 "\nOptions:"
+//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:
+//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"
/* Absolute maximum on output line length */
#if ENABLE_DESKTOP
#include <sys/times.h> /* for times() */
-//#include <sys/sysinfo.h> /* for sysinfo() */
#ifndef AT_CLKTCK
-#define AT_CLKTCK 17
+# 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
+ */
#if ENABLE_SELINUX
-#define SELINIX_O_PREFIX "label,"
-#define DEFAULT_O_STR (SELINIX_O_PREFIX "pid,user" USE_FEATURE_PS_TIME(",time") ",args")
+# 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" USE_FEATURE_PS_TIME(",time") ",args")
+# define DEFAULT_O_STR ("pid,user" IF_FEATURE_PS_TIME(",time") ",args")
#endif
typedef struct {
uint16_t width;
- char name[6];
+ char name6[6];
const char *header;
void (*f)(char *buf, int size, const procps_status_t *ps);
int ps_flags;
unsigned long long seconds_since_boot;
#endif
char default_o[sizeof(DEFAULT_O_STR)];
-};
+} FIX_ALIASING;
#define G (*(struct globals*)&bb_common_bufsiz1)
#define out (G.out )
#define out_cnt (G.out_cnt )
#define kernel_HZ (G.kernel_HZ )
#define seconds_since_boot (G.seconds_since_boot)
#define default_o (G.default_o )
+#define INIT_G() do { } while (0)
#if ENABLE_FEATURE_PS_TIME
/* for ELF executables, notes are pushed before environment and args */
static ptrdiff_t find_elf_note(ptrdiff_t findme)
{
- ptrdiff_t *ep = (ptrdiff_t *) environ;
+ ptrdiff_t *ep = (ptrdiff_t *) environ;
- while (*ep++);
- while (*ep) {
- if (ep[0] == findme) {
- return ep[1];
- }
- ep += 2;
- }
- return -1;
+ 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;
+ struct timeval tv1, tv2;
+ unsigned t1, t2, r, hz;
+ unsigned cnt = cnt; /* for compiler */
+ int diff;
- r = 0;
+ r = 0;
- /* Wait for times() to reach new tick */
- t1 = times(NULL);
- do {
- t2 = times(NULL);
- } while (t2 == t1);
- gettimeofday(&tv2, NULL);
+ /* 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;
+ do {
+ t1 = t2;
+ tv1.tv_usec = tv2.tv_usec;
- /* Wait exactly one times() tick */
- do {
- t2 = times(NULL);
- } while (t2 == t1);
- gettimeofday(&tv2, NULL);
+ /* 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;
+ /* 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 */
+ if (r != hz) {
+ r = hz;
+ cnt = 0;
+ }
+ cnt++;
+ } while (cnt < 3); /* exit if saw 3 same values */
- return r;
+ return r;
}
#else
static inline unsigned get_HZ_by_waiting(void)
if (kernel_HZ == (unsigned)-1)
kernel_HZ = get_HZ_by_waiting();
- //if (open_read_close("/proc/uptime", buf, sizeof(buf) <= 0)
- // bb_perror_msg_and_die("cannot read %s", "/proc/uptime");
+ //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, "%llu", &seconds_since_boot);
sysinfo(&info);
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_stat(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, ps->pid, ps->comm);
+ read_cmdline(buf, size+1, ps->pid, ps->comm);
}
static void func_pid(char *buf, int size, const procps_status_t *ps)
static void put_lu(char *buf, int size, unsigned long u)
{
- char buf5[5];
+ char buf4[5];
/* see http://en.wikipedia.org/wiki/Tera */
- smart_ulltoa4( (u, buf5, " mgtpezy");
- buf5[5] = '\0';
- sprintf(buf, "%.*s", size, buf5);
+ smart_ulltoa4(u, buf4, " mgtpezy");
+ buf4[4] = '\0';
+ sprintf(buf, "%.*s", size, buf4);
}
static void func_vsz(char *buf, int size, const procps_status_t *ps)
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 */
mm /= 60;
snprintf(buf, size+1, "%3lu:%02u", mm, ss);
}
+
#endif
#if ENABLE_SELINUX
*/
static const ps_out_t out_spec[] = {
-// Mandated by POSIX:
+/* 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 },
- { 256 , "args" ,"COMMAND",func_args ,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
-// { sizeof("GROUP" )-1, "group" ,"GROUP" ,func_group ,PSSCAN_UIDGID },
-// { sizeof("NI" )-1, "nice" ,"NI" ,func_nice ,PSSCAN_ },
-// { sizeof("%CPU" )-1, "pcpu" ,"%CPU" ,func_pcpu ,PSSCAN_ },
-// { sizeof("RGROUP" )-1, "rgroup","RGROUP" ,func_rgroup,PSSCAN_UIDGID },
-// { sizeof("RUSER" )-1, "ruser" ,"RUSER" ,func_ruser ,PSSCAN_UIDGID },
+#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 by POSIX, but useful:
+/* Not mandated, but useful: */
+ { 4 , "stat" ,"STAT" ,func_stat ,PSSCAN_STAT },
{ 4 , "rss" ,"RSS" ,func_rss ,PSSCAN_RSS },
#if ENABLE_SELINUX
{ 35 , "label" ,"LABEL" ,func_label ,PSSCAN_CONTEXT },
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;
+ unsigned i;
+ char buf[ARRAY_SIZE(out_spec)*7 + 1];
+ char *p = buf;
+
for (i = 0; i < ARRAY_SIZE(out_spec); i++) {
- if (!strcmp(name, out_spec[i].name))
+ 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)
print_header = 1;
}
-static void post_process(void)
+static void alloc_line_buffer(void)
{
int i;
int width = 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())
}
int ps_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int ps_main(int argc, char **argv)
+int ps_main(int argc UNUSED_PARAM, char **argv)
{
procps_status_t *p;
llist_t* opt_o = NULL;
- USE_SELINUX(int opt;)
+ 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.)
+ // -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 */
+ /* We allow (and ignore) most of the above. FIXME.
+ * -T is picked for threads (POSIX hasn't it standardized).
+ * 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::";
- USE_SELINUX(opt =) getopt32(argv, "Zo:aAdefl", &opt_o);
+ opt = getopt32(argv, "Zo:aAdefl"IF_FEATURE_SHOW_THREADS("T"), &opt_o);
if (opt_o) {
do {
- parse_o(opt_o->data);
- opt_o = opt_o->link;
+ parse_o(llist_pop(&opt_o));
} while (opt_o);
} else {
/* Below: parse_o() needs char*, NOT const char*... */
#if ENABLE_SELINUX
- if (!(opt & 1) || !is_selinux_enabled()) {
+ if (!(opt & OPT_Z) || !is_selinux_enabled()) {
/* no -Z or no SELinux: do not show LABEL */
- strcpy(default_o, DEFAULT_O_STR + sizeof(SELINIX_O_PREFIX)-1);
+ strcpy(default_o, DEFAULT_O_STR + sizeof(SELINUX_O_PREFIX)-1);
} else
#endif
{
}
parse_o(default_o);
}
- post_process();
+#if ENABLE_FEATURE_SHOW_THREADS
+ if (opt & OPT_T)
+ need_flags |= PSSCAN_TASKS;
+#endif
/* Was INT_MAX, but some libc's go belly up with printf("%.*s")
* and such large widths */
if (--terminal_width > MAX_WIDTH)
terminal_width = MAX_WIDTH;
}
+ alloc_line_buffer();
format_header();
p = NULL;
- while ((p = procps_scan(p, need_flags))) {
+ while ((p = procps_scan(p, need_flags)) != NULL) {
format_process(p);
}
int ps_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
-int ps_main(int argc, char **argv)
-{
- procps_status_t *p = NULL;
- int len;
- SKIP_SELINUX(const) int use_selinux = 0;
- USE_SELINUX(int i;)
-#if !ENABLE_FEATURE_PS_WIDE
- enum { terminal_width = 79 };
-#else
- int terminal_width;
+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,
+ };
+ int opts = 0;
+ /* If we support any options, parse argv */
+#if ENABLE_SELINUX || ENABLE_FEATURE_SHOW_THREADS || ENABLE_FEATURE_PS_WIDE
+# if ENABLE_FEATURE_PS_WIDE
+ /* -w is a bit complicated */
int w_count = 0;
-#endif
-
-#if ENABLE_FEATURE_PS_WIDE || ENABLE_SELINUX
-#if ENABLE_FEATURE_PS_WIDE
opt_complementary = "-:ww";
- USE_SELINUX(i =) getopt32(argv, USE_SELINUX("Z") "w", &w_count);
+ opts = getopt32(argv, IF_SELINUX("Z")IF_FEATURE_SHOW_THREADS("T")"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;
+ 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 /* only ENABLE_SELINUX */
- i = getopt32(argv, "Z");
+# else
+ /* -w is not supported, only -Z and/or -T */
+ opt_complementary = "-";
+ opts = getopt32(argv, IF_SELINUX("Z")IF_FEATURE_SHOW_THREADS("T"));
+# endif
#endif
-#if ENABLE_SELINUX
- if ((i & 1) && is_selinux_enabled())
- use_selinux = PSSCAN_CONTEXT;
-#endif
-#endif /* ENABLE_FEATURE_PS_WIDE || ENABLE_SELINUX */
- if (use_selinux)
+#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
+ } else
+#endif
+ {
puts(" PID USER VSZ STAT COMMAND");
+ }
+ if (opts & OPT_T) {
+ psscan_flags |= PSSCAN_TASKS;
+ }
- while ((p = procps_scan(p, 0
- | PSSCAN_PID
- | PSSCAN_UIDGID
- | PSSCAN_STATE
- | PSSCAN_VSZ
- | PSSCAN_COMM
- | use_selinux
- ))) {
+ p = NULL;
+ while ((p = procps_scan(p, psscan_flags)) != NULL) {
+ int len;
#if ENABLE_SELINUX
- if (use_selinux) {
- len = printf("%5u %-32.32s %s ",
+ if (psscan_flags & PSSCAN_CONTEXT) {
+ len = printf("%5u %-32.32s %s ",
p->pid,
p->context ? p->context : "unknown",
p->state);
char buf6[6];
smart_ulltoa5(p->vsz, buf6, " mgtpezy");
buf6[5] = '\0';
- len = printf("%5u %-8.8s %s %s ",
+ len = printf("%5u %-8.8s %s %s ",
p->pid, user, buf6, p->state);
}
}
return EXIT_SUCCESS;
}
-#endif /* ENABLE_DESKTOP */
+#endif /* !ENABLE_DESKTOP */
projects / oweals / busybox.git / blobdiff