* 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.
+ * Licensed under GPLv2 or later, see file LICENSE in this source tree.
*/
#include "libbb.h"
void FAST_FUNC free_procps_scan(procps_status_t* sp)
{
closedir(sp->dir);
+#if ENABLE_FEATURE_SHOW_THREADS
+ if (sp->task_dir)
+ closedir(sp->task_dir);
+#endif
free(sp->argv0);
free(sp->exe);
IF_SELINUX(free(sp->context);)
free(sp);
}
-#if ENABLE_FEATURE_TOPMEM
+#if ENABLE_FEATURE_TOPMEM || ENABLE_PMAP
static unsigned long fast_strtoul_16(char **endptr)
{
unsigned char 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
+#if ENABLE_FEATURE_FAST_TOP || ENABLE_FEATURE_TOPMEM || ENABLE_PMAP
/* We cut a lot of corners here for speed */
static unsigned long fast_strtoul_10(char **endptr)
{
return n;
}
+# if ENABLE_FEATURE_FAST_TOP
static long fast_strtol_10(char **endptr)
{
if (**endptr != '-')
(*endptr)++;
return - (long)fast_strtoul_10(endptr);
}
+# endif
static char *skip_fields(char *str, int count)
{
}
#endif
+#if ENABLE_FEATURE_TOPMEM || ENABLE_PMAP
+int FAST_FUNC procps_read_smaps(pid_t pid, struct smaprec *total,
+ void (*cb)(struct smaprec *, void *), void *data)
+{
+ FILE *file;
+ struct smaprec currec;
+ char filename[sizeof("/proc/%u/smaps") + sizeof(int)*3];
+ char buf[PROCPS_BUFSIZE];
+#if !ENABLE_PMAP
+ void (*cb)(struct smaprec *, void *) = NULL;
+ void *data = NULL;
+#endif
+
+ sprintf(filename, "/proc/%u/smaps", (int)pid);
+
+ file = fopen_for_read(filename);
+ if (!file)
+ return 1;
+
+ memset(&currec, 0, sizeof(currec));
+ while (fgets(buf, PROCPS_BUFSIZE, file)) {
+ // Each mapping datum has this form:
+ // f7d29000-f7d39000 rw-s ADR M:m OFS FILE
+ // Size: nnn kB
+ // Rss: nnn kB
+ // .....
+
+ char *tp = buf, *p;
+
+#define SCAN(S, X) \
+ if (strncmp(tp, S, sizeof(S)-1) == 0) { \
+ tp = skip_whitespace(tp + sizeof(S)-1); \
+ total->X += currec.X = fast_strtoul_10(&tp); \
+ continue; \
+ }
+ if (cb) {
+ SCAN("Pss:" , smap_pss );
+ SCAN("Swap:" , smap_swap );
+ }
+ SCAN("Private_Dirty:", private_dirty);
+ SCAN("Private_Clean:", private_clean);
+ SCAN("Shared_Dirty:" , shared_dirty );
+ SCAN("Shared_Clean:" , shared_clean );
+#undef SCAN
+ tp = strchr(buf, '-');
+ if (tp) {
+ // We reached next mapping - the line of this form:
+ // f7d29000-f7d39000 rw-s ADR M:m OFS FILE
+
+ if (cb) {
+ /* If we have a previous record, there's nothing more
+ * for it, call the callback and clear currec
+ */
+ if (currec.smap_size)
+ cb(&currec, data);
+ free(currec.smap_name);
+ }
+ memset(&currec, 0, sizeof(currec));
+
+ *tp = ' ';
+ tp = buf;
+ currec.smap_start = fast_strtoul_16(&tp);
+ currec.smap_size = (fast_strtoul_16(&tp) - currec.smap_start) >> 10;
+
+ strncpy(currec.smap_mode, tp, sizeof(currec.smap_mode)-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 (currec.smap_mode[1] == 'w') {
+ currec.mapped_rw = currec.smap_size;
+ total->mapped_rw += currec.smap_size;
+ } else if (currec.smap_mode[1] == '-') {
+ currec.mapped_ro = currec.smap_size;
+ total->mapped_ro += currec.smap_size;
+ }
+ }
+
+ if (strcmp(tp, "[stack]\n") == 0)
+ total->stack += currec.smap_size;
+ if (cb) {
+ p = skip_non_whitespace(tp);
+ if (p == tp) {
+ currec.smap_name = xstrdup(" [ anon ]");
+ } else {
+ *p = '\0';
+ currec.smap_name = xstrdup(tp);
+ }
+ }
+ total->smap_size += currec.smap_size;
+ }
+ }
+ fclose(file);
+
+ if (cb) {
+ if (currec.smap_size)
+ cb(&currec, data);
+ free(currec.smap_name);
+ }
+
+ return 0;
+}
+#endif
+
void BUG_comm_size(void);
procps_status_t* FAST_FUNC procps_scan(procps_status_t* sp, int flags)
{
sp = alloc_procps_scan();
for (;;) {
+#if ENABLE_FEATURE_SHOW_THREADS
+ if ((flags & PSSCAN_TASKS) && sp->task_dir) {
+ entry = readdir(sp->task_dir);
+ if (entry)
+ goto got_entry;
+ closedir(sp->task_dir);
+ sp->task_dir = NULL;
+ sp->main_thread_pid = 0;
+ }
+#endif
entry = readdir(sp->dir);
if (entry == NULL) {
free_procps_scan(sp);
return NULL;
}
+ IF_FEATURE_SHOW_THREADS(got_entry:)
pid = bb_strtou(entry->d_name, NULL, 10);
if (errno)
continue;
+#if ENABLE_FEATURE_SHOW_THREADS
+ if ((flags & PSSCAN_TASKS) && !sp->task_dir) {
+ /* We found another /proc/PID. Do not use it,
+ * there will be /proc/PID/task/PID (same PID!),
+ * so just go ahead and dive into /proc/PID/task. */
+ char task_dir[sizeof("/proc/%u/task") + sizeof(int)*3];
+ sprintf(task_dir, "/proc/%u/task", pid);
+ sp->task_dir = xopendir(task_dir);
+ sp->main_thread_pid = pid;
+ continue;
+ }
+#endif
- /* After this point we have to break, not continue
- * ("continue" would mean that current /proc/NNN
- * is not a valid process info) */
+ /* After this point we can:
+ * "break": stop parsing, return the data
+ * "continue": try next /proc/XXX
+ */
memset(&sp->vsz, 0, sizeof(*sp) - offsetof(procps_status_t, vsz));
sp->pid = pid;
- if (!(flags & ~PSSCAN_PID)) break;
+ if (!(flags & ~PSSCAN_PID))
+ break; /* we needed only pid, we got it */
#if ENABLE_SELINUX
if (flags & PSSCAN_CONTEXT) {
if (flags & PSSCAN_UIDGID) {
if (stat(filename, &sb))
- break;
+ continue; /* process probably exited */
/* Effective UID/GID, not real */
sp->uid = sb.st_uid;
sp->gid = sb.st_gid;
strcpy(filename_tail, "stat");
n = read_to_buf(filename, buf);
if (n < 0)
- break;
+ continue; /* process probably exited */
cp = strrchr(buf, ')'); /* split into "PID (cmd" and "<rest>" */
/*if (!cp || cp[1] != ' ')
- break;*/
+ continue;*/
cp[0] = '\0';
if (sizeof(sp->comm) < 16)
BUG_comm_size();
"%lu " /* start_time */
"%lu " /* vsize */
"%lu " /* rss */
-#if ENABLE_FEATURE_TOP_SMP_PROCESS
+# if ENABLE_FEATURE_TOP_SMP_PROCESS
"%*s %*s %*s %*s %*s %*s " /*rss_rlim, start_code, end_code, start_stack, kstk_esp, kstk_eip */
"%*s %*s %*s %*s " /*signal, blocked, sigignore, sigcatch */
"%*s %*s %*s %*s " /*wchan, nswap, cnswap, exit_signal */
"%d" /*cpu last seen on*/
-#endif
+# endif
,
sp->state, &sp->ppid,
&sp->pgid, &sp->sid, &tty,
&sp->start_time,
&vsz,
&rss
-#if ENABLE_FEATURE_TOP_SMP_PROCESS
+# if ENABLE_FEATURE_TOP_SMP_PROCESS
, &sp->last_seen_on_cpu
-#endif
+# endif
);
if (n < 11)
- break;
-#if ENABLE_FEATURE_TOP_SMP_PROCESS
+ continue; /* bogus data, get next /proc/XXX */
+# if ENABLE_FEATURE_TOP_SMP_PROCESS
if (n < 11+15)
sp->last_seen_on_cpu = 0;
-#endif
+# endif
/* vsz is in bytes and we want kb */
sp->vsz = vsz >> 10;
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;
-#if ENABLE_FEATURE_TOP_SMP_PROCESS
+# if ENABLE_FEATURE_TOP_SMP_PROCESS
/* (6): rss_rlim, start_code, end_code, start_stack, kstk_esp, kstk_eip */
/* (4): signal, blocked, sigignore, sigcatch */
/* (4): wchan, nswap, cnswap, exit_signal */
cp = skip_fields(cp, 14);
//FIXME: is it safe to assume this field exists?
sp->last_seen_on_cpu = fast_strtoul_10(&cp);
-#endif
-#endif /* end of !ENABLE_FEATURE_TOP_SMP_PROCESS */
+# endif
+#endif /* FEATURE_FAST_TOP */
#if ENABLE_FEATURE_PS_ADDITIONAL_COLUMNS
sp->niceness = tasknice;
}
#if ENABLE_FEATURE_TOPMEM
- if (flags & (PSSCAN_SMAPS)) {
- FILE *file;
-
- strcpy(filename_tail, "smaps");
- file = fopen_for_read(filename);
- 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);
- }
+ if (flags & PSSCAN_SMAPS)
+ procps_read_smaps(pid, &sp->smaps, NULL, NULL);
#endif /* TOPMEM */
#if ENABLE_FEATURE_PS_ADDITIONAL_COLUMNS
if (flags & PSSCAN_RUIDGID) {
strcpy(filename_tail, "status");
file = fopen_for_read(filename);
- if (!file)
- break;
- while (fgets(buf, sizeof(buf), file)) {
- char *tp;
+ if (file) {
+ while (fgets(buf, sizeof(buf), file)) {
+ char *tp;
#define SCAN_TWO(str, name, statement) \
if (strncmp(buf, str, sizeof(str)-1) == 0) { \
tp = skip_whitespace(buf + sizeof(str)-1); \
sscanf(tp, "%u", &sp->name); \
statement; \
}
- SCAN_TWO("Uid:", ruid, continue);
- SCAN_TWO("Gid:", rgid, break);
+ SCAN_TWO("Uid:", ruid, continue);
+ SCAN_TWO("Gid:", rgid, break);
#undef SCAN_TWO
+ }
+ fclose(file);
}
- fclose(file);
}
#endif /* PS_ADDITIONAL_COLUMNS */
+ if (flags & PSSCAN_EXE) {
+ strcpy(filename_tail, "exe");
+ free(sp->exe);
+ sp->exe = xmalloc_readlink(filename);
+ }
+ /* Note: if /proc/PID/cmdline is empty,
+ * code below "breaks". Therefore it must be
+ * the last code to parse /proc/PID/xxx data
+ * (we used to have /proc/PID/exe parsing after it
+ * and were getting stale sp->exe).
+ */
#if 0 /* PSSCAN_CMD is not used */
if (flags & (PSSCAN_CMD|PSSCAN_ARGV0)) {
free(sp->argv0);
}
}
#endif
- if (flags & PSSCAN_EXE) {
- strcpy(filename_tail, "exe");
- free(sp->exe);
- sp->exe = xmalloc_readlink(filename);
- }
break;
- }
+ } /* for (;;) */
+
return sp;
}
void FAST_FUNC read_cmdline(char *buf, int col, unsigned pid, const char *comm)
{
- ssize_t sz;
+ int sz;
char filename[sizeof("/proc//cmdline") + sizeof(int)*3];
sprintf(filename, "/proc/%u/cmdline", pid);
- sz = open_read_close(filename, buf, col);
+ sz = open_read_close(filename, buf, col - 1);
if (sz > 0) {
buf[sz] = '\0';
- while (--sz >= 0)
+ while (--sz >= 0 && buf[sz] == '\0')
+ continue;
+ do {
if ((unsigned char)(buf[sz]) < ' ')
buf[sz] = ' ';
+ } while (--sz >= 0);
} else {
snprintf(buf, col, "[%s]", comm);
}
projects / oweals / busybox.git / blobdiff