*
* Copyright 1998 by Albert Cahalan; all rights reserved.
* Copyright (C) 2002 by Vladimir Oleynik <dzo@simtreas.ru>
+ * SELinux support: (c) 2007 by Yuichi Nakamura <ynakam@hitachisoft.jp>
*
* Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
*/
typedef struct unsigned_to_name_map_t {
unsigned id;
- char name[12];
+ char name[USERNAME_MAX_SIZE];
} unsigned_to_name_map_t;
typedef struct cache_t {
}
#endif
-typedef char* ug_func(char *name, long uid, int bufsize);
+typedef char* ug_func(char *name, int bufsize, long uid);
static char* get_cached(cache_t *cp, unsigned id, ug_func* fp)
{
int i;
i = cp->size++;
cp->cache = xrealloc(cp->cache, cp->size * sizeof(*cp->cache));
cp->cache[i].id = id;
- fp(cp->cache[i].name, id, sizeof(cp->cache[i].name));
+ /* Never fails. Generates numeric string if name isn't found */
+ fp(cp->cache[i].name, sizeof(cp->cache[i].name), id);
return cp->cache[i].name;
}
const char* get_cached_username(uid_t uid)
static int read_to_buf(const char *filename, void *buf)
{
- ssize_t ret;
- ret = open_read_close(filename, buf, PROCPS_BUFSIZE-1);
+ int fd;
+ /* open_read_close() would do two reads, checking for EOF.
+ * When you have 10000 /proc/$NUM/stat to read, it isn't desirable */
+ ssize_t ret = -1;
+ fd = open(filename, O_RDONLY);
+ if (fd >= 0) {
+ ret = read(fd, buf, PROCPS_BUFSIZE-1);
+ close(fd);
+ }
((char *)buf)[ret > 0 ? ret : 0] = '\0';
return ret;
}
-procps_status_t* alloc_procps_scan(int flags)
+procps_status_t *alloc_procps_scan(int flags)
{
+ unsigned n = getpagesize();
procps_status_t* sp = xzalloc(sizeof(procps_status_t));
sp->dir = xopendir("/proc");
+ while (1) {
+ n >>= 1;
+ if (!n) break;
+ sp->shift_pages_to_bytes++;
+ }
+ sp->shift_pages_to_kb = sp->shift_pages_to_bytes - 10;
return sp;
}
void free_procps_scan(procps_status_t* sp)
{
closedir(sp->dir);
- free(sp->cmd);
+ free(sp->argv0);
+ USE_SELINUX(free(sp->context);)
free(sp);
}
+#if ENABLE_FEATURE_TOPMEM
+static unsigned long fast_strtoul_16(char **endptr)
+{
+ unsigned char c;
+ char *str = *endptr;
+ unsigned long n = 0;
+
+ while ((c = *str++) != ' ') {
+ c = ((c|0x20) - '0');
+ if (c > 9)
+ // c = c + '0' - 'a' + 10:
+ c = c - ('a' - '0' - 10);
+ n = n*16 + c;
+ }
+ *endptr = str; /* We skip trailing space! */
+ return n;
+}
+/* TOPMEM uses fast_strtoul_10, so... */
+#undef ENABLE_FEATURE_FAST_TOP
+#define ENABLE_FEATURE_FAST_TOP 1
+#endif
+
+#if ENABLE_FEATURE_FAST_TOP
+/* We cut a lot of corners here for speed */
+static unsigned long fast_strtoul_10(char **endptr)
+{
+ char c;
+ char *str = *endptr;
+ unsigned long n = *str - '0';
+
+ while ((c = *++str) != ' ')
+ n = n*10 + (c - '0');
+
+ *endptr = str + 1; /* We skip trailing space! */
+ return n;
+}
+static char *skip_fields(char *str, int count)
+{
+ do {
+ while (*str++ != ' ')
+ continue;
+ /* we found a space char, str points after it */
+ } while (--count);
+ return str;
+}
+#endif
+
void BUG_comm_size(void);
-procps_status_t* procps_scan(procps_status_t* sp, int flags)
+procps_status_t *procps_scan(procps_status_t* sp, int flags)
{
struct dirent *entry;
char buf[PROCPS_BUFSIZE];
free_procps_scan(sp);
return NULL;
}
- if (safe_strtou(entry->d_name, &pid))
+ pid = bb_strtou(entry->d_name, NULL, 10);
+ if (errno)
continue;
/* After this point we have to break, not continue
* ("continue" would mean that current /proc/NNN
* is not a valid process info) */
- memset(&sp->rss, 0, sizeof(*sp) - offsetof(procps_status_t, rss));
+ memset(&sp->vsz, 0, sizeof(*sp) - offsetof(procps_status_t, vsz));
sp->pid = pid;
if (!(flags & ~PSSCAN_PID)) break;
+#if ENABLE_SELINUX
+ if (flags & PSSCAN_CONTEXT) {
+ if (getpidcon(sp->pid, &sp->context) < 0)
+ sp->context = NULL;
+ }
+#endif
+
filename_tail = filename + sprintf(filename, "/proc/%d", pid);
if (flags & PSSCAN_UIDGID) {
if (stat(filename, &sb))
break;
- /* Need comment - is this effective or read UID/GID? */
+ /* Need comment - is this effective or real UID/GID? */
sp->uid = sb.st_uid;
sp->gid = sb.st_gid;
}
-
+
if (flags & PSSCAN_STAT) {
- char *cp;
+ char *cp, *comm1;
+ int tty;
+#if !ENABLE_FEATURE_FAST_TOP
+ unsigned long vsz, rss;
+#endif
+
/* see proc(5) for some details on this */
strcpy(filename_tail, "/stat");
n = read_to_buf(filename, buf);
if (n < 0)
break;
cp = strrchr(buf, ')'); /* split into "PID (cmd" and "<rest>" */
- if (!cp || cp[1] != ' ')
- break;
+ /*if (!cp || cp[1] != ' ')
+ break;*/
cp[0] = '\0';
if (sizeof(sp->comm) < 16)
BUG_comm_size();
- sscanf(buf, "%*s (%15c", sp->comm);
+ comm1 = strchr(buf, '(');
+ /*if (comm1)*/
+ safe_strncpy(sp->comm, comm1 + 1, sizeof(sp->comm));
+
+#if !ENABLE_FEATURE_FAST_TOP
n = sscanf(cp+2,
"%c %u " /* state, ppid */
- "%u %u %*s %*s " /* pgid, sid, tty, tpgid */
+ "%u %u %d %*s " /* pgid, sid, tty, tpgid */
"%*s %*s %*s %*s %*s " /* flags, min_flt, cmin_flt, maj_flt, cmaj_flt */
"%lu %lu " /* utime, stime */
"%*s %*s %*s " /* cutime, cstime, priority */
"%ld " /* nice */
- "%*s %*s %*s " /* timeout, it_real_value, start_time */
- "%*s " /* vsize */
- "%lu", /* rss */
+ "%*s %*s " /* timeout, it_real_value */
+ "%lu " /* start_time */
+ "%lu " /* vsize */
+ "%lu " /* rss */
+ /* "%lu %lu %lu %lu %lu %lu " rss_rlim, start_code, end_code, start_stack, kstk_esp, kstk_eip */
+ /* "%u %u %u %u " signal, blocked, sigignore, sigcatch */
+ /* "%lu %lu %lu" wchan, nswap, cnswap */
+ ,
sp->state, &sp->ppid,
- &sp->pgid, &sp->sid,
+ &sp->pgid, &sp->sid, &tty,
&sp->utime, &sp->stime,
&tasknice,
- &sp->rss);
- if (n != 8)
+ &sp->start_time,
+ &vsz,
+ &rss);
+ if (n != 10)
break;
+ /* vsz is in bytes and we want kb */
+ sp->vsz = vsz >> 10;
+ /* vsz is in bytes but rss is in *PAGES*! Can you believe that? */
+ sp->rss = rss << sp->shift_pages_to_kb;
+ sp->tty_major = (tty >> 8) & 0xfff;
+ sp->tty_minor = (tty & 0xff) | ((tty >> 12) & 0xfff00);
+#else
+/* This costs ~100 bytes more but makes top faster by 20%
+ * If you run 10000 processes, this may be important for you */
+ sp->state[0] = cp[2];
+ cp += 4;
+ sp->ppid = fast_strtoul_10(&cp);
+ sp->pgid = fast_strtoul_10(&cp);
+ sp->sid = fast_strtoul_10(&cp);
+ tty = fast_strtoul_10(&cp);
+ sp->tty_major = (tty >> 8) & 0xfff;
+ sp->tty_minor = (tty & 0xff) | ((tty >> 12) & 0xfff00);
+ cp = skip_fields(cp, 6); /* tpgid, flags, min_flt, cmin_flt, maj_flt, cmaj_flt */
+ sp->utime = fast_strtoul_10(&cp);
+ sp->stime = fast_strtoul_10(&cp);
+ cp = skip_fields(cp, 3); /* cutime, cstime, priority */
+ tasknice = fast_strtoul_10(&cp);
+ cp = skip_fields(cp, 2); /* timeout, it_real_value */
+ sp->start_time = fast_strtoul_10(&cp);
+ /* vsz is in bytes and we want kb */
+ sp->vsz = fast_strtoul_10(&cp) >> 10;
+ /* vsz is in bytes but rss is in *PAGES*! Can you believe that? */
+ sp->rss = fast_strtoul_10(&cp) << sp->shift_pages_to_kb;
+#endif
- if (sp->rss == 0 && sp->state[0] != 'Z')
+ if (sp->vsz == 0 && sp->state[0] != 'Z')
sp->state[1] = 'W';
else
sp->state[1] = ' ';
if (tasknice < 0)
sp->state[2] = '<';
- else if (tasknice > 0)
+ else if (tasknice) /* > 0 */
sp->state[2] = 'N';
else
sp->state[2] = ' ';
-#ifdef PAGE_SHIFT
- sp->rss <<= (PAGE_SHIFT - 10); /* 2**10 = 1kb */
-#else
- sp->rss *= (getpagesize() >> 10); /* 2**10 = 1kb */
-#endif
}
- if (flags & PSSCAN_CMD) {
+#if ENABLE_FEATURE_TOPMEM
+ if (flags & (PSSCAN_SMAPS)) {
+ FILE *file;
+
+ strcpy(filename_tail, "/smaps");
+ file = fopen(filename, "r");
+ if (!file)
+ break;
+ while (fgets(buf, sizeof(buf), file)) {
+ unsigned long sz;
+ char *tp;
+ char w;
+#define SCAN(str, name) \
+ if (strncmp(buf, str, sizeof(str)-1) == 0) { \
+ tp = skip_whitespace(buf + sizeof(str)-1); \
+ sp->name += fast_strtoul_10(&tp); \
+ continue; \
+ }
+ SCAN("Shared_Clean:" , shared_clean );
+ SCAN("Shared_Dirty:" , shared_dirty );
+ SCAN("Private_Clean:", private_clean);
+ SCAN("Private_Dirty:", private_dirty);
+#undef SCAN
+ // f7d29000-f7d39000 rw-s ADR M:m OFS FILE
+ tp = strchr(buf, '-');
+ if (tp) {
+ *tp = ' ';
+ tp = buf;
+ sz = fast_strtoul_16(&tp); /* start */
+ sz = (fast_strtoul_16(&tp) - sz) >> 10; /* end - start */
+ // tp -> "rw-s" string
+ w = tp[1];
+ // skipping "rw-s ADR M:m OFS "
+ tp = skip_whitespace(skip_fields(tp, 4));
+ // filter out /dev/something (something != zero)
+ if (strncmp(tp, "/dev/", 5) != 0 || strcmp(tp, "/dev/zero\n") == 0) {
+ if (w == 'w') {
+ sp->mapped_rw += sz;
+ } else if (w == '-') {
+ sp->mapped_ro += sz;
+ }
+ }
+//else printf("DROPPING %s (%s)\n", buf, tp);
+ if (strcmp(tp, "[stack]\n") == 0)
+ sp->stack += sz;
+ }
+ }
+ fclose(file);
+ }
+#endif /* TOPMEM */
+
+#if 0 /* PSSCAN_CMD is not used */
+ if (flags & (PSSCAN_CMD|PSSCAN_ARGV0)) {
+ free(sp->argv0);
+ sp->argv0 = NULL;
free(sp->cmd);
sp->cmd = NULL;
strcpy(filename_tail, "/cmdline");
+ /* TODO: to get rid of size limits, read into malloc buf,
+ * then realloc it down to real size. */
+ n = read_to_buf(filename, buf);
+ if (n <= 0)
+ break;
+ if (flags & PSSCAN_ARGV0)
+ sp->argv0 = xstrdup(buf);
+ if (flags & PSSCAN_CMD) {
+ do {
+ n--;
+ if ((unsigned char)(buf[n]) < ' ')
+ buf[n] = ' ';
+ } while (n);
+ sp->cmd = xstrdup(buf);
+ }
+ }
+#else
+ if (flags & (PSSCAN_ARGV0|PSSCAN_ARGVN)) {
+ free(sp->argv0);
+ sp->argv0 = NULL;
+ strcpy(filename_tail, "/cmdline");
n = read_to_buf(filename, buf);
if (n <= 0)
break;
- if (buf[n-1] == '\n') {
- if (!--n)
- break;
- buf[n] = '\0';
+#if ENABLE_PGREP || ENABLE_PKILL
+ if (flags & PSSCAN_ARGVN) {
+ do {
+ n--;
+ if (buf[n] == '\0')
+ buf[n] = ' ';
+ } while (n);
}
- do {
- n--;
- if ((unsigned char)(buf[n]) < ' ')
- buf[n] = ' ';
- } while (n);
- sp->cmd = strdup(buf);
+#endif
+ sp->argv0 = xstrdup(buf);
}
+#endif
break;
}
return sp;
}
+
+void read_cmdline(char *buf, int col, unsigned pid, const char *comm)
+{
+ ssize_t sz;
+ char filename[sizeof("/proc//cmdline") + sizeof(int)*3];
+
+ sprintf(filename, "/proc/%u/cmdline", pid);
+ sz = open_read_close(filename, buf, col);
+ if (sz > 0) {
+ buf[sz] = '\0';
+ while (--sz >= 0)
+ if ((unsigned char)(buf[sz]) < ' ')
+ buf[sz] = ' ';
+ } else {
+ snprintf(buf, col, "[%s]", comm);
+ }
+}
+
/* from kernel:
// pid comm S ppid pgid sid tty_nr tty_pgrp flg
sprintf(buffer,"%d (%s) %c %d %d %d %d %d %lu %lu \
tty_pgrp,
task->flags,
min_flt,
-
cmin_flt,
maj_flt,
cmaj_flt,
projects / oweals / busybox.git / blobdiff