* 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.
*/
-#include "busybox.h"
+#include "libbb.h"
+
+/* Absolute maximum on output line length */
+enum { MAX_WIDTH = 2*1024 };
#if ENABLE_DESKTOP
+#include <sys/times.h> /* for times() */
+//#include <sys/sysinfo.h> /* for sysinfo() */
+#ifndef AT_CLKTCK
+#define AT_CLKTCK 17
+#endif
+
+
+#if ENABLE_SELINUX
+#define SELINUX_O_PREFIX "label,"
+#define DEFAULT_O_STR (SELINUX_O_PREFIX "pid,user" USE_FEATURE_PS_TIME(",time") ",args")
+#else
+#define DEFAULT_O_STR ("pid,user" USE_FEATURE_PS_TIME(",time") ",args")
+#endif
+
+typedef struct {
+ uint16_t width;
+ char name[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 long seconds_since_boot;
+#endif
+ char default_o[sizeof(DEFAULT_O_STR)];
+};
+#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 seconds_since_boot (G.seconds_since_boot)
+#define default_o (G.default_o )
+
+#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;
+
+ while (*ep++);
+ 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)
+{
+ //char buf[64];
+ struct sysinfo info;
+
+ 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();
+
+ //if (open_read_close("/proc/uptime", buf, sizeof(buf) <= 0)
+ // bb_perror_msg_and_die("cannot read %s", "/proc/uptime");
+ //buf[sizeof(buf)-1] = '\0';
+ ///sscanf(buf, "%llu", &seconds_since_boot);
+ sysinfo(&info);
+ seconds_since_boot = info.uptime;
+
+ return kernel_HZ;
+}
+#endif
+
/* Print value to buf, max size+1 chars (including trailing '\0') */
-void func_user(char *buf, int size, const procps_status_t *ps)
+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
}
-void func_comm(char *buf, int size, const procps_status_t *ps)
+static void func_comm(char *buf, int size, const procps_status_t *ps)
{
safe_strncpy(buf, ps->comm, size+1);
}
-void func_args(char *buf, int size, const procps_status_t *ps)
+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, ps->pid, ps->comm);
}
-void func_pid(char *buf, int size, const procps_status_t *ps)
+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);
}
-void func_ppid(char *buf, int size, const procps_status_t *ps)
+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);
}
-void func_pgid(char *buf, int size, const procps_status_t *ps)
+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);
}
-void func_rss(char *buf, int size, const procps_status_t *ps)
+static void put_lu(char *buf, int size, unsigned long u)
{
- char buf5[5];
- smart_ulltoa5( ((unsigned long long)ps->rss) << 10, buf5);
- snprintf(buf, size+1, "%.*s", size, buf5);
+ char buf4[5];
+
+ /* see http://en.wikipedia.org/wiki/Tera */
+ smart_ulltoa4(u, buf4, " mgtpezy");
+ buf4[4] = '\0';
+ sprintf(buf, "%.*s", size, buf4);
}
-/*
-void func_nice(char *buf, int size, const procps_status_t *ps)
+static void func_vsz(char *buf, int size, const procps_status_t *ps)
{
- ps->???
+ put_lu(buf, size, ps->vsz);
}
-void func_etime(char *buf, int size, const procps_status_t *ps)
+static void func_rss(char *buf, int size, const procps_status_t *ps)
{
- elapled time [[dd-]hh:]mm:ss
+ put_lu(buf, size, ps->rss);
}
-void func_time(char *buf, int size, const procps_status_t *ps)
+static void func_tty(char *buf, int size, const procps_status_t *ps)
{
- cumulative time [[dd-]hh:]mm:ss
+ 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_pcpu(char *buf, int size, const procps_status_t *ps)
+#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 = seconds_since_boot - mm;
+ ss = mm % 60;
+ mm /= 60;
+ snprintf(buf, size+1, "%3lu:%02u", mm, ss);
}
-void func_tty(char *buf, int size, const procps_status_t *ps)
+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
-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_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 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 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 },
+ { 8 , "user" ,"USER" ,func_user ,PSSCAN_UIDGID },
+ { 16 , "comm" ,"COMMAND",func_comm ,PSSCAN_COMM },
+ { 256 , "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_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:
+ { 4 , "rss" ,"RSS" ,func_rss ,PSSCAN_RSS },
+#if ENABLE_SELINUX
+ { 35 , "label" ,"LABEL" ,func_label ,PSSCAN_CONTEXT },
+#endif
};
-#define VEC_SIZE(v) ( sizeof(v) / sizeof((v)[0]) )
-
-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 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++) {
+ unsigned i;
+ for (i = 0; i < ARRAY_SIZE(out_spec); i++) {
if (!strcmp(name, out_spec[i].name))
return &out_spec[i];
}
}
break;
}
+ // opt points to last spec in comma separated list.
+ // This one can have =HEADER part.
new = new_out_t();
if (equal)
*equal = '\0';
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 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) {
// 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) {
- *p++ = '-';
- *p = '\0';
+ 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;
- while (len--)
- *p++ = ' ';
- *p = '\0';
+ p += sprintf(p, "%*s", len, "");
}
printf("%.*s\n", terminal_width, buffer);
}
-/* Cannot be const: parse_o() will choke */
-static char default_o[] = "pid,user" /* TODO: ,vsz,stat */ ",args";
-
-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;
+ USE_SELINUX(int opt;)
// POSIX:
// -a Write information for all processes associated with terminals
// -f Generate a full listing
// -l Generate a long listing
// -o col1,col2,col3=header
- // Select which columns to distplay
+ // Select which columns to display
/* We allow (and ignore) most of the above. FIXME */
opt_complementary = "o::";
- getopt32(argc, argv, "o:aAdefl", &opt_o);
+ USE_SELINUX(opt =) getopt32(argv, "Zo:aAdefl", &opt_o);
if (opt_o) {
- opt_o = rev_llist(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*... */
+#if ENABLE_SELINUX
+ if (!(opt & 1) || !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();
- 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--;
+ get_terminal_width_height(0, &terminal_width, NULL);
+ if (--terminal_width > MAX_WIDTH)
+ terminal_width = MAX_WIDTH;
}
format_header();
p = NULL;
- while ((p = procps_scan(p, ps_flags))) {
+ while ((p = procps_scan(p, need_flags))) {
format_process(p);
}
#else /* !ENABLE_DESKTOP */
-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;
+ int len;
SKIP_SELINUX(const) int use_selinux = 0;
- USE_SELINUX(security_context_t sid = NULL;)
+ USE_SELINUX(int i;)
#if !ENABLE_FEATURE_PS_WIDE
enum { terminal_width = 79 };
#else
- int terminal_width;
+ unsigned terminal_width;
int w_count = 0;
#endif
#if ENABLE_FEATURE_PS_WIDE || ENABLE_SELINUX
#if ENABLE_FEATURE_PS_WIDE
opt_complementary = "-:ww";
- USE_SELINUX(i =) getopt32(argc, argv, USE_SELINUX("c") "w", &w_count);
+ USE_SELINUX(i =) getopt32(argv, USE_SELINUX("Z") "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 /* only ENABLE_SELINUX */
- i = getopt32(argc, argv, "c");
+ i = getopt32(argv, "Z");
#endif
#if ENABLE_SELINUX
if ((i & 1) && is_selinux_enabled())
- use_selinux = 1;
+ use_selinux = PSSCAN_CONTEXT;
#endif
#endif /* ENABLE_FEATURE_PS_WIDE || ENABLE_SELINUX */
if (use_selinux)
- puts(" PID Context Stat Command");
+ puts(" PID CONTEXT STAT COMMAND");
else
- puts(" PID Uid VmSize Stat Command");
+ puts(" PID USER VSZ STAT COMMAND");
while ((p = procps_scan(p, 0
| PSSCAN_PID
| PSSCAN_UIDGID
| PSSCAN_STATE
- | PSSCAN_RSS
- | PSSCAN_CMD
+ | PSSCAN_VSZ
+ | PSSCAN_COMM
+ | use_selinux
))) {
- char *namecmd = p->cmd;
#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);
+ 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->rss == 0)
- len = printf("%5u %-8s %s ",
- p->pid, user, p->state);
- else
- len = printf("%5u %-8s %6ld %s ",
- p->pid, user, p->rss, p->state);
+ //if (p->vsz == 0)
+ // len = printf("%5u %-8.8s %s ",
+ // p->pid, user, p->state);
+ //else
+ {
+ char buf6[6];
+ smart_ulltoa5(p->vsz, buf6, " mgtpezy");
+ buf6[5] = '\0';
+ 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;
+ char buf[sz + 1];
+ read_cmdline(buf, sz, p->pid, p->comm);
+ puts(buf);
}
}
if (ENABLE_FEATURE_CLEAN_UP)
projects / oweals / busybox.git / blobdiff