1 /* vi: set sw=4 ts=4: */
5 * Copyright 1998 by Albert Cahalan; all rights reserved.
6 * Copyright (C) 2002 by Vladimir Oleynik <dzo@simtreas.ru>
7 * SELinux support: (c) 2007 by Yuichi Nakamura <ynakam@hitachisoft.jp>
9 * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
15 typedef struct unsigned_to_name_map_t {
17 char name[USERNAME_MAX_SIZE];
18 } unsigned_to_name_map_t;
20 typedef struct cache_t {
21 unsigned_to_name_map_t *cache;
25 static cache_t username, groupname;
27 static void clear_cache(cache_t *cp)
33 void FAST_FUNC clear_username_cache(void)
35 clear_cache(&username);
36 clear_cache(&groupname);
39 #if 0 /* more generic, but we don't need that yet */
40 /* Returns -N-1 if not found. */
41 /* cp->cache[N] is allocated and must be filled in this case */
42 static int get_cached(cache_t *cp, unsigned id)
45 for (i = 0; i < cp->size; i++)
46 if (cp->cache[i].id == id)
49 cp->cache = xrealloc_vector(cp->cache, 2, i);
50 cp->cache[i++].id = id;
55 static char* get_cached(cache_t *cp, long id,
56 char* FAST_FUNC x2x_utoa(long id))
59 for (i = 0; i < cp->size; i++)
60 if (cp->cache[i].id == id)
61 return cp->cache[i].name;
63 cp->cache = xrealloc_vector(cp->cache, 2, i);
65 /* Never fails. Generates numeric string if name isn't found */
66 safe_strncpy(cp->cache[i].name, x2x_utoa(id), sizeof(cp->cache[i].name));
67 return cp->cache[i].name;
69 const char* FAST_FUNC get_cached_username(uid_t uid)
71 return get_cached(&username, uid, uid2uname_utoa);
73 const char* FAST_FUNC get_cached_groupname(gid_t gid)
75 return get_cached(&groupname, gid, gid2group_utoa);
79 #define PROCPS_BUFSIZE 1024
81 static int read_to_buf(const char *filename, void *buf)
84 /* open_read_close() would do two reads, checking for EOF.
85 * When you have 10000 /proc/$NUM/stat to read, it isn't desirable */
87 fd = open(filename, O_RDONLY);
89 ret = read(fd, buf, PROCPS_BUFSIZE-1);
92 ((char *)buf)[ret > 0 ? ret : 0] = '\0';
96 static procps_status_t* FAST_FUNC alloc_procps_scan(void)
98 unsigned n = getpagesize();
99 procps_status_t* sp = xzalloc(sizeof(procps_status_t));
100 sp->dir = xopendir("/proc");
104 sp->shift_pages_to_bytes++;
106 sp->shift_pages_to_kb = sp->shift_pages_to_bytes - 10;
110 void FAST_FUNC free_procps_scan(procps_status_t* sp)
114 IF_SELINUX(free(sp->context);)
118 #if ENABLE_FEATURE_TOPMEM
119 static unsigned long fast_strtoul_16(char **endptr)
125 while ((c = *str++) != ' ') {
126 c = ((c|0x20) - '0');
128 // c = c + '0' - 'a' + 10:
129 c = c - ('a' - '0' - 10);
132 *endptr = str; /* We skip trailing space! */
135 /* TOPMEM uses fast_strtoul_10, so... */
136 #undef ENABLE_FEATURE_FAST_TOP
137 #define ENABLE_FEATURE_FAST_TOP 1
140 #if ENABLE_FEATURE_FAST_TOP
141 /* We cut a lot of corners here for speed */
142 static unsigned long fast_strtoul_10(char **endptr)
146 unsigned long n = *str - '0';
148 while ((c = *++str) != ' ')
149 n = n*10 + (c - '0');
151 *endptr = str + 1; /* We skip trailing space! */
155 static long fast_strtol_10(char **endptr)
158 return fast_strtoul_10(endptr);
161 return - (long)fast_strtoul_10(endptr);
164 static char *skip_fields(char *str, int count)
167 while (*str++ != ' ')
169 /* we found a space char, str points after it */
175 void BUG_comm_size(void);
176 procps_status_t* FAST_FUNC procps_scan(procps_status_t* sp, int flags)
178 struct dirent *entry;
179 char buf[PROCPS_BUFSIZE];
180 char filename[sizeof("/proc//cmdline") + sizeof(int)*3];
188 sp = alloc_procps_scan();
191 entry = readdir(sp->dir);
193 free_procps_scan(sp);
196 pid = bb_strtou(entry->d_name, NULL, 10);
200 /* After this point we have to break, not continue
201 * ("continue" would mean that current /proc/NNN
202 * is not a valid process info) */
204 memset(&sp->vsz, 0, sizeof(*sp) - offsetof(procps_status_t, vsz));
207 if (!(flags & ~PSSCAN_PID)) break;
210 if (flags & PSSCAN_CONTEXT) {
211 if (getpidcon(sp->pid, &sp->context) < 0)
216 filename_tail = filename + sprintf(filename, "/proc/%d", pid);
218 if (flags & PSSCAN_UIDGID) {
219 if (stat(filename, &sb))
221 /* Effective UID/GID, not real */
226 if (flags & PSSCAN_STAT) {
229 #if !ENABLE_FEATURE_FAST_TOP
230 unsigned long vsz, rss;
232 /* see proc(5) for some details on this */
233 strcpy(filename_tail, "/stat");
234 n = read_to_buf(filename, buf);
237 cp = strrchr(buf, ')'); /* split into "PID (cmd" and "<rest>" */
238 /*if (!cp || cp[1] != ' ')
241 if (sizeof(sp->comm) < 16)
243 comm1 = strchr(buf, '(');
245 safe_strncpy(sp->comm, comm1 + 1, sizeof(sp->comm));
247 #if !ENABLE_FEATURE_FAST_TOP
249 "%c %u " /* state, ppid */
250 "%u %u %d %*s " /* pgid, sid, tty, tpgid */
251 "%*s %*s %*s %*s %*s " /* flags, min_flt, cmin_flt, maj_flt, cmaj_flt */
252 "%lu %lu " /* utime, stime */
253 "%*s %*s %*s " /* cutime, cstime, priority */
255 "%*s %*s " /* timeout, it_real_value */
256 "%lu " /* start_time */
259 #if ENABLE_FEATURE_TOP_SMP_PROCESS
260 "%*s %*s %*s %*s %*s %*s " /*rss_rlim, start_code, end_code, start_stack, kstk_esp, kstk_eip */
261 "%*s %*s %*s %*s " /*signal, blocked, sigignore, sigcatch */
262 "%*s %*s %*s %*s " /*wchan, nswap, cnswap, exit_signal */
263 "%d" /*cpu last seen on*/
266 sp->state, &sp->ppid,
267 &sp->pgid, &sp->sid, &tty,
268 &sp->utime, &sp->stime,
273 #if ENABLE_FEATURE_TOP_SMP_PROCESS
274 , &sp->last_seen_on_cpu
280 #if ENABLE_FEATURE_TOP_SMP_PROCESS
282 sp->last_seen_on_cpu = 0;
285 /* vsz is in bytes and we want kb */
287 /* vsz is in bytes but rss is in *PAGES*! Can you believe that? */
288 sp->rss = rss << sp->shift_pages_to_kb;
289 sp->tty_major = (tty >> 8) & 0xfff;
290 sp->tty_minor = (tty & 0xff) | ((tty >> 12) & 0xfff00);
292 /* This costs ~100 bytes more but makes top faster by 20%
293 * If you run 10000 processes, this may be important for you */
294 sp->state[0] = cp[2];
296 sp->ppid = fast_strtoul_10(&cp);
297 sp->pgid = fast_strtoul_10(&cp);
298 sp->sid = fast_strtoul_10(&cp);
299 tty = fast_strtoul_10(&cp);
300 sp->tty_major = (tty >> 8) & 0xfff;
301 sp->tty_minor = (tty & 0xff) | ((tty >> 12) & 0xfff00);
302 cp = skip_fields(cp, 6); /* tpgid, flags, min_flt, cmin_flt, maj_flt, cmaj_flt */
303 sp->utime = fast_strtoul_10(&cp);
304 sp->stime = fast_strtoul_10(&cp);
305 cp = skip_fields(cp, 3); /* cutime, cstime, priority */
306 tasknice = fast_strtol_10(&cp);
307 cp = skip_fields(cp, 2); /* timeout, it_real_value */
308 sp->start_time = fast_strtoul_10(&cp);
309 /* vsz is in bytes and we want kb */
310 sp->vsz = fast_strtoul_10(&cp) >> 10;
311 /* vsz is in bytes but rss is in *PAGES*! Can you believe that? */
312 sp->rss = fast_strtoul_10(&cp) << sp->shift_pages_to_kb;
313 #if ENABLE_FEATURE_TOP_SMP_PROCESS
314 /* (6): rss_rlim, start_code, end_code, start_stack, kstk_esp, kstk_eip */
315 /* (4): signal, blocked, sigignore, sigcatch */
316 /* (4): wchan, nswap, cnswap, exit_signal */
317 cp = skip_fields(cp, 14);
318 //FIXME: is it safe to assume this field exists?
319 sp->last_seen_on_cpu = fast_strtoul_10(&cp);
321 #endif /* end of !ENABLE_FEATURE_TOP_SMP_PROCESS */
323 #if ENABLE_FEATURE_PS_ADDITIONAL_COLUMNS
324 sp->niceness = tasknice;
327 if (sp->vsz == 0 && sp->state[0] != 'Z')
333 else if (tasknice) /* > 0 */
339 #if ENABLE_FEATURE_TOPMEM
340 if (flags & (PSSCAN_SMAPS)) {
343 strcpy(filename_tail, "/smaps");
344 file = fopen_for_read(filename);
347 while (fgets(buf, sizeof(buf), file)) {
351 #define SCAN(str, name) \
352 if (strncmp(buf, str, sizeof(str)-1) == 0) { \
353 tp = skip_whitespace(buf + sizeof(str)-1); \
354 sp->name += fast_strtoul_10(&tp); \
357 SCAN("Shared_Clean:" , shared_clean );
358 SCAN("Shared_Dirty:" , shared_dirty );
359 SCAN("Private_Clean:", private_clean);
360 SCAN("Private_Dirty:", private_dirty);
362 // f7d29000-f7d39000 rw-s ADR M:m OFS FILE
363 tp = strchr(buf, '-');
367 sz = fast_strtoul_16(&tp); /* start */
368 sz = (fast_strtoul_16(&tp) - sz) >> 10; /* end - start */
369 // tp -> "rw-s" string
371 // skipping "rw-s ADR M:m OFS "
372 tp = skip_whitespace(skip_fields(tp, 4));
373 // filter out /dev/something (something != zero)
374 if (strncmp(tp, "/dev/", 5) != 0 || strcmp(tp, "/dev/zero\n") == 0) {
377 } else if (w == '-') {
381 //else printf("DROPPING %s (%s)\n", buf, tp);
382 if (strcmp(tp, "[stack]\n") == 0)
389 #if ENABLE_FEATURE_PS_ADDITIONAL_COLUMNS
390 if (flags & PSSCAN_RUIDGID) {
393 strcpy(filename_tail, "/status");
394 file = fopen_for_read(filename);
397 while (fgets(buf, sizeof(buf), file)) {
399 #define SCAN_TWO(str, name, statement) \
400 if (strncmp(buf, str, sizeof(str)-1) == 0) { \
401 tp = skip_whitespace(buf + sizeof(str)-1); \
402 sscanf(tp, "%u", &sp->name); \
405 SCAN_TWO("Uid:", ruid, continue);
406 SCAN_TWO("Gid:", rgid, break);
411 #endif /* PS_ADDITIONAL_COLUMNS */
412 #if 0 /* PSSCAN_CMD is not used */
413 if (flags & (PSSCAN_CMD|PSSCAN_ARGV0)) {
418 strcpy(filename_tail, "/cmdline");
419 /* TODO: to get rid of size limits, read into malloc buf,
420 * then realloc it down to real size. */
421 n = read_to_buf(filename, buf);
424 if (flags & PSSCAN_ARGV0)
425 sp->argv0 = xstrdup(buf);
426 if (flags & PSSCAN_CMD) {
429 if ((unsigned char)(buf[n]) < ' ')
432 sp->cmd = xstrdup(buf);
436 if (flags & (PSSCAN_ARGV0|PSSCAN_ARGVN)) {
439 strcpy(filename_tail, "/cmdline");
440 n = read_to_buf(filename, buf);
443 if (flags & PSSCAN_ARGVN) {
445 sp->argv0 = xmalloc(n + 1);
446 memcpy(sp->argv0, buf, n + 1);
447 /* sp->argv0[n] = '\0'; - buf has it */
450 sp->argv0 = xstrdup(buf);
459 void FAST_FUNC read_cmdline(char *buf, int col, unsigned pid, const char *comm)
462 char filename[sizeof("/proc//cmdline") + sizeof(int)*3];
464 sprintf(filename, "/proc/%u/cmdline", pid);
465 sz = open_read_close(filename, buf, col);
469 if ((unsigned char)(buf[sz]) < ' ')
472 snprintf(buf, col, "[%s]", comm);
477 // pid comm S ppid pgid sid tty_nr tty_pgrp flg
478 sprintf(buffer,"%d (%s) %c %d %d %d %d %d %lu %lu \
479 %lu %lu %lu %lu %lu %ld %ld %ld %ld %d 0 %llu %lu %ld %lu %lu %lu %lu %lu \
480 %lu %lu %lu %lu %lu %lu %lu %lu %d %d %lu %lu %llu\n",
494 cputime_to_clock_t(utime),
495 cputime_to_clock_t(stime),
496 cputime_to_clock_t(cutime),
497 cputime_to_clock_t(cstime),
504 mm ? get_mm_rss(mm) : 0,
506 mm ? mm->start_code : 0,
507 mm ? mm->end_code : 0,
508 mm ? mm->start_stack : 0,
511 the rest is some obsolete cruft