[3320] | 1 | /* vi: set sw=4 ts=4: */
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| 2 | /*
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| 3 | * Utility routines.
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| 4 | *
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| 5 | * Copyright 1998 by Albert Cahalan; all rights reserved.
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| 6 | * Copyright (C) 2002 by Vladimir Oleynik <dzo@simtreas.ru>
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| 7 | * SELinux support: (c) 2007 by Yuichi Nakamura <ynakam@hitachisoft.jp>
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| 8 | *
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| 9 | * Licensed under GPLv2 or later, see file LICENSE in this source tree.
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| 10 | */
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| 11 |
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| 12 | #include "libbb.h"
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| 13 |
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| 14 |
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| 15 | typedef struct unsigned_to_name_map_t {
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| 16 | long id;
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| 17 | char name[USERNAME_MAX_SIZE];
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| 18 | } unsigned_to_name_map_t;
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| 19 |
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| 20 | typedef struct cache_t {
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| 21 | unsigned_to_name_map_t *cache;
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| 22 | int size;
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| 23 | } cache_t;
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| 24 |
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| 25 | static cache_t username, groupname;
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| 26 |
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| 27 | static void clear_cache(cache_t *cp)
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| 28 | {
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| 29 | free(cp->cache);
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| 30 | cp->cache = NULL;
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| 31 | cp->size = 0;
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| 32 | }
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| 33 | void FAST_FUNC clear_username_cache(void)
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| 34 | {
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| 35 | clear_cache(&username);
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| 36 | clear_cache(&groupname);
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| 37 | }
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| 38 |
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| 39 | #if 0 /* more generic, but we don't need that yet */
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| 40 | /* Returns -N-1 if not found. */
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| 41 | /* cp->cache[N] is allocated and must be filled in this case */
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| 42 | static int get_cached(cache_t *cp, unsigned id)
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| 43 | {
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| 44 | int i;
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| 45 | for (i = 0; i < cp->size; i++)
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| 46 | if (cp->cache[i].id == id)
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| 47 | return i;
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| 48 | i = cp->size++;
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| 49 | cp->cache = xrealloc_vector(cp->cache, 2, i);
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| 50 | cp->cache[i++].id = id;
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| 51 | return -i;
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| 52 | }
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| 53 | #endif
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| 54 |
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| 55 | static char* get_cached(cache_t *cp, long id,
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| 56 | char* FAST_FUNC x2x_utoa(long id))
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| 57 | {
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| 58 | int i;
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| 59 | for (i = 0; i < cp->size; i++)
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| 60 | if (cp->cache[i].id == id)
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| 61 | return cp->cache[i].name;
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| 62 | i = cp->size++;
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| 63 | cp->cache = xrealloc_vector(cp->cache, 2, i);
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| 64 | cp->cache[i].id = id;
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| 65 | /* Never fails. Generates numeric string if name isn't found */
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| 66 | safe_strncpy(cp->cache[i].name, x2x_utoa(id), sizeof(cp->cache[i].name));
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| 67 | return cp->cache[i].name;
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| 68 | }
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| 69 | const char* FAST_FUNC get_cached_username(uid_t uid)
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| 70 | {
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| 71 | return get_cached(&username, uid, uid2uname_utoa);
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| 72 | }
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| 73 | const char* FAST_FUNC get_cached_groupname(gid_t gid)
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| 74 | {
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| 75 | return get_cached(&groupname, gid, gid2group_utoa);
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| 76 | }
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| 77 |
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| 78 |
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| 79 | #define PROCPS_BUFSIZE 1024
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| 80 |
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| 81 | static int read_to_buf(const char *filename, void *buf)
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| 82 | {
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| 83 | int fd;
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| 84 | /* open_read_close() would do two reads, checking for EOF.
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| 85 | * When you have 10000 /proc/$NUM/stat to read, it isn't desirable */
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| 86 | ssize_t ret = -1;
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| 87 | fd = open(filename, O_RDONLY);
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| 88 | if (fd >= 0) {
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| 89 | ret = read(fd, buf, PROCPS_BUFSIZE-1);
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| 90 | close(fd);
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| 91 | }
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| 92 | ((char *)buf)[ret > 0 ? ret : 0] = '\0';
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| 93 | return ret;
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| 94 | }
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| 95 |
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| 96 | static procps_status_t* FAST_FUNC alloc_procps_scan(void)
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| 97 | {
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| 98 | unsigned n = getpagesize();
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| 99 | procps_status_t* sp = xzalloc(sizeof(procps_status_t));
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| 100 | sp->dir = xopendir("/proc");
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| 101 | while (1) {
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| 102 | n >>= 1;
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| 103 | if (!n) break;
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| 104 | sp->shift_pages_to_bytes++;
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| 105 | }
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| 106 | sp->shift_pages_to_kb = sp->shift_pages_to_bytes - 10;
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| 107 | return sp;
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| 108 | }
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| 109 |
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| 110 | void FAST_FUNC free_procps_scan(procps_status_t* sp)
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| 111 | {
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| 112 | closedir(sp->dir);
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| 113 | #if ENABLE_FEATURE_SHOW_THREADS
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| 114 | if (sp->task_dir)
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| 115 | closedir(sp->task_dir);
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| 116 | #endif
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| 117 | free(sp->argv0);
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| 118 | free(sp->exe);
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| 119 | IF_SELINUX(free(sp->context);)
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| 120 | free(sp);
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| 121 | }
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| 122 |
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| 123 | #if ENABLE_FEATURE_TOPMEM || ENABLE_PMAP
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| 124 | static unsigned long fast_strtoul_16(char **endptr)
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| 125 | {
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| 126 | unsigned char c;
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| 127 | char *str = *endptr;
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| 128 | unsigned long n = 0;
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| 129 |
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| 130 | while ((c = *str++) != ' ') {
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| 131 | c = ((c|0x20) - '0');
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| 132 | if (c > 9)
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| 133 | // c = c + '0' - 'a' + 10:
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| 134 | c = c - ('a' - '0' - 10);
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| 135 | n = n*16 + c;
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| 136 | }
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| 137 | *endptr = str; /* We skip trailing space! */
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| 138 | return n;
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| 139 | }
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| 140 | #endif
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| 141 |
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| 142 | #if ENABLE_FEATURE_FAST_TOP || ENABLE_FEATURE_TOPMEM || ENABLE_PMAP
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| 143 | /* We cut a lot of corners here for speed */
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| 144 | static unsigned long fast_strtoul_10(char **endptr)
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| 145 | {
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| 146 | char c;
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| 147 | char *str = *endptr;
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| 148 | unsigned long n = *str - '0';
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| 149 |
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| 150 | while ((c = *++str) != ' ')
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| 151 | n = n*10 + (c - '0');
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| 152 |
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| 153 | *endptr = str + 1; /* We skip trailing space! */
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| 154 | return n;
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| 155 | }
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| 156 |
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| 157 | # if ENABLE_FEATURE_FAST_TOP
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| 158 | static long fast_strtol_10(char **endptr)
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| 159 | {
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| 160 | if (**endptr != '-')
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| 161 | return fast_strtoul_10(endptr);
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| 162 |
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| 163 | (*endptr)++;
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| 164 | return - (long)fast_strtoul_10(endptr);
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| 165 | }
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| 166 | # endif
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| 167 |
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| 168 | static char *skip_fields(char *str, int count)
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| 169 | {
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| 170 | do {
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| 171 | while (*str++ != ' ')
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| 172 | continue;
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| 173 | /* we found a space char, str points after it */
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| 174 | } while (--count);
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| 175 | return str;
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| 176 | }
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| 177 | #endif
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| 178 |
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| 179 | #if ENABLE_FEATURE_TOPMEM || ENABLE_PMAP
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| 180 | int FAST_FUNC procps_read_smaps(pid_t pid, struct smaprec *total,
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| 181 | void (*cb)(struct smaprec *, void *), void *data)
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| 182 | {
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| 183 | FILE *file;
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| 184 | struct smaprec currec;
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| 185 | char filename[sizeof("/proc/%u/smaps") + sizeof(int)*3];
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| 186 | char buf[PROCPS_BUFSIZE];
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| 187 | #if !ENABLE_PMAP
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| 188 | void (*cb)(struct smaprec *, void *) = NULL;
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| 189 | void *data = NULL;
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| 190 | #endif
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| 191 |
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| 192 | sprintf(filename, "/proc/%u/smaps", (int)pid);
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| 193 |
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| 194 | file = fopen_for_read(filename);
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| 195 | if (!file)
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| 196 | return 1;
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| 197 |
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| 198 | memset(&currec, 0, sizeof(currec));
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| 199 | while (fgets(buf, PROCPS_BUFSIZE, file)) {
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| 200 | // Each mapping datum has this form:
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| 201 | // f7d29000-f7d39000 rw-s ADR M:m OFS FILE
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| 202 | // Size: nnn kB
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| 203 | // Rss: nnn kB
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| 204 | // .....
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| 205 |
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| 206 | char *tp = buf, *p;
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| 207 |
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| 208 | #define SCAN(S, X) \
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| 209 | if (strncmp(tp, S, sizeof(S)-1) == 0) { \
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| 210 | tp = skip_whitespace(tp + sizeof(S)-1); \
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| 211 | total->X += currec.X = fast_strtoul_10(&tp); \
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| 212 | continue; \
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| 213 | }
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| 214 | if (cb) {
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| 215 | SCAN("Pss:" , smap_pss );
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| 216 | SCAN("Swap:" , smap_swap );
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| 217 | }
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| 218 | SCAN("Private_Dirty:", private_dirty);
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| 219 | SCAN("Private_Clean:", private_clean);
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| 220 | SCAN("Shared_Dirty:" , shared_dirty );
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| 221 | SCAN("Shared_Clean:" , shared_clean );
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| 222 | #undef SCAN
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| 223 | tp = strchr(buf, '-');
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| 224 | if (tp) {
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| 225 | // We reached next mapping - the line of this form:
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| 226 | // f7d29000-f7d39000 rw-s ADR M:m OFS FILE
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| 227 |
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| 228 | if (cb) {
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| 229 | /* If we have a previous record, there's nothing more
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| 230 | * for it, call the callback and clear currec
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| 231 | */
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| 232 | if (currec.smap_size)
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| 233 | cb(&currec, data);
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| 234 | free(currec.smap_name);
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| 235 | }
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| 236 | memset(&currec, 0, sizeof(currec));
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| 237 |
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| 238 | *tp = ' ';
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| 239 | tp = buf;
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| 240 | currec.smap_start = fast_strtoul_16(&tp);
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| 241 | currec.smap_size = (fast_strtoul_16(&tp) - currec.smap_start) >> 10;
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| 242 |
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| 243 | strncpy(currec.smap_mode, tp, sizeof(currec.smap_mode)-1);
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| 244 |
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| 245 | // skipping "rw-s ADR M:m OFS "
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| 246 | tp = skip_whitespace(skip_fields(tp, 4));
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| 247 | // filter out /dev/something (something != zero)
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| 248 | if (strncmp(tp, "/dev/", 5) != 0 || strcmp(tp, "/dev/zero\n") == 0) {
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| 249 | if (currec.smap_mode[1] == 'w') {
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| 250 | currec.mapped_rw = currec.smap_size;
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| 251 | total->mapped_rw += currec.smap_size;
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| 252 | } else if (currec.smap_mode[1] == '-') {
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| 253 | currec.mapped_ro = currec.smap_size;
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| 254 | total->mapped_ro += currec.smap_size;
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| 255 | }
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| 256 | }
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| 257 |
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| 258 | if (strcmp(tp, "[stack]\n") == 0)
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| 259 | total->stack += currec.smap_size;
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| 260 | if (cb) {
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| 261 | p = skip_non_whitespace(tp);
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| 262 | if (p == tp) {
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| 263 | currec.smap_name = xstrdup(" [ anon ]");
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| 264 | } else {
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| 265 | *p = '\0';
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| 266 | currec.smap_name = xstrdup(tp);
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| 267 | }
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| 268 | }
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| 269 | total->smap_size += currec.smap_size;
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| 270 | }
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| 271 | }
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| 272 | fclose(file);
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| 273 |
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| 274 | if (cb) {
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| 275 | if (currec.smap_size)
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| 276 | cb(&currec, data);
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| 277 | free(currec.smap_name);
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| 278 | }
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| 279 |
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| 280 | return 0;
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| 281 | }
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| 282 | #endif
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| 283 |
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| 284 | void BUG_comm_size(void);
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| 285 | procps_status_t* FAST_FUNC procps_scan(procps_status_t* sp, int flags)
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| 286 | {
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| 287 | struct dirent *entry;
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| 288 | char buf[PROCPS_BUFSIZE];
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| 289 | char filename[sizeof("/proc//cmdline") + sizeof(int)*3];
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| 290 | char *filename_tail;
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| 291 | long tasknice;
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| 292 | unsigned pid;
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| 293 | int n;
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| 294 | struct stat sb;
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| 295 |
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| 296 | if (!sp)
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| 297 | sp = alloc_procps_scan();
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| 298 |
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| 299 | for (;;) {
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| 300 | #if ENABLE_FEATURE_SHOW_THREADS
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| 301 | if ((flags & PSSCAN_TASKS) && sp->task_dir) {
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| 302 | entry = readdir(sp->task_dir);
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| 303 | if (entry)
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| 304 | goto got_entry;
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| 305 | closedir(sp->task_dir);
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| 306 | sp->task_dir = NULL;
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| 307 | }
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| 308 | #endif
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| 309 | entry = readdir(sp->dir);
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| 310 | if (entry == NULL) {
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| 311 | free_procps_scan(sp);
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| 312 | return NULL;
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| 313 | }
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| 314 | IF_FEATURE_SHOW_THREADS(got_entry:)
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| 315 | pid = bb_strtou(entry->d_name, NULL, 10);
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| 316 | if (errno)
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| 317 | continue;
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| 318 | #if ENABLE_FEATURE_SHOW_THREADS
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| 319 | if ((flags & PSSCAN_TASKS) && !sp->task_dir) {
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| 320 | /* We found another /proc/PID. Do not use it,
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| 321 | * there will be /proc/PID/task/PID (same PID!),
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| 322 | * so just go ahead and dive into /proc/PID/task. */
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| 323 | char task_dir[sizeof("/proc/%u/task") + sizeof(int)*3];
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| 324 | sprintf(task_dir, "/proc/%u/task", pid);
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| 325 | sp->task_dir = xopendir(task_dir);
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| 326 | continue;
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| 327 | }
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| 328 | #endif
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| 329 |
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| 330 | /* After this point we can:
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| 331 | * "break": stop parsing, return the data
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| 332 | * "continue": try next /proc/XXX
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| 333 | */
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| 334 |
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| 335 | memset(&sp->vsz, 0, sizeof(*sp) - offsetof(procps_status_t, vsz));
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| 336 |
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| 337 | sp->pid = pid;
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| 338 | if (!(flags & ~PSSCAN_PID))
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| 339 | break; /* we needed only pid, we got it */
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| 340 |
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| 341 | #if ENABLE_SELINUX
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| 342 | if (flags & PSSCAN_CONTEXT) {
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| 343 | if (getpidcon(sp->pid, &sp->context) < 0)
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| 344 | sp->context = NULL;
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| 345 | }
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| 346 | #endif
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| 347 |
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| 348 | filename_tail = filename + sprintf(filename, "/proc/%u/", pid);
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| 349 |
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| 350 | if (flags & PSSCAN_UIDGID) {
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| 351 | if (stat(filename, &sb))
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| 352 | continue; /* process probably exited */
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| 353 | /* Effective UID/GID, not real */
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| 354 | sp->uid = sb.st_uid;
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| 355 | sp->gid = sb.st_gid;
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| 356 | }
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| 357 |
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| 358 | if (flags & PSSCAN_STAT) {
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| 359 | char *cp, *comm1;
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| 360 | int tty;
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| 361 | #if !ENABLE_FEATURE_FAST_TOP
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| 362 | unsigned long vsz, rss;
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| 363 | #endif
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| 364 | /* see proc(5) for some details on this */
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| 365 | strcpy(filename_tail, "stat");
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| 366 | n = read_to_buf(filename, buf);
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| 367 | if (n < 0)
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| 368 | continue; /* process probably exited */
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| 369 | cp = strrchr(buf, ')'); /* split into "PID (cmd" and "<rest>" */
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| 370 | /*if (!cp || cp[1] != ' ')
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| 371 | continue;*/
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| 372 | cp[0] = '\0';
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| 373 | if (sizeof(sp->comm) < 16)
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| 374 | BUG_comm_size();
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| 375 | comm1 = strchr(buf, '(');
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| 376 | /*if (comm1)*/
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| 377 | safe_strncpy(sp->comm, comm1 + 1, sizeof(sp->comm));
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| 378 |
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| 379 | #if !ENABLE_FEATURE_FAST_TOP
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| 380 | n = sscanf(cp+2,
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| 381 | "%c %u " /* state, ppid */
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| 382 | "%u %u %d %*s " /* pgid, sid, tty, tpgid */
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| 383 | "%*s %*s %*s %*s %*s " /* flags, min_flt, cmin_flt, maj_flt, cmaj_flt */
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| 384 | "%lu %lu " /* utime, stime */
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| 385 | "%*s %*s %*s " /* cutime, cstime, priority */
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| 386 | "%ld " /* nice */
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| 387 | "%*s %*s " /* timeout, it_real_value */
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| 388 | "%lu " /* start_time */
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| 389 | "%lu " /* vsize */
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| 390 | "%lu " /* rss */
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| 391 | # if ENABLE_FEATURE_TOP_SMP_PROCESS
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| 392 | "%*s %*s %*s %*s %*s %*s " /*rss_rlim, start_code, end_code, start_stack, kstk_esp, kstk_eip */
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| 393 | "%*s %*s %*s %*s " /*signal, blocked, sigignore, sigcatch */
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| 394 | "%*s %*s %*s %*s " /*wchan, nswap, cnswap, exit_signal */
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| 395 | "%d" /*cpu last seen on*/
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| 396 | # endif
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| 397 | ,
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| 398 | sp->state, &sp->ppid,
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| 399 | &sp->pgid, &sp->sid, &tty,
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| 400 | &sp->utime, &sp->stime,
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| 401 | &tasknice,
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| 402 | &sp->start_time,
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| 403 | &vsz,
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| 404 | &rss
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| 405 | # if ENABLE_FEATURE_TOP_SMP_PROCESS
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| 406 | , &sp->last_seen_on_cpu
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| 407 | # endif
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| 408 | );
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| 409 |
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| 410 | if (n < 11)
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| 411 | continue; /* bogus data, get next /proc/XXX */
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| 412 | # if ENABLE_FEATURE_TOP_SMP_PROCESS
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| 413 | if (n < 11+15)
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| 414 | sp->last_seen_on_cpu = 0;
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| 415 | # endif
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| 416 |
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| 417 | /* vsz is in bytes and we want kb */
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| 418 | sp->vsz = vsz >> 10;
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| 419 | /* vsz is in bytes but rss is in *PAGES*! Can you believe that? */
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| 420 | sp->rss = rss << sp->shift_pages_to_kb;
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| 421 | sp->tty_major = (tty >> 8) & 0xfff;
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| 422 | sp->tty_minor = (tty & 0xff) | ((tty >> 12) & 0xfff00);
|
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| 423 | #else
|
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| 424 | /* This costs ~100 bytes more but makes top faster by 20%
|
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| 425 | * If you run 10000 processes, this may be important for you */
|
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| 426 | sp->state[0] = cp[2];
|
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| 427 | cp += 4;
|
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| 428 | sp->ppid = fast_strtoul_10(&cp);
|
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| 429 | sp->pgid = fast_strtoul_10(&cp);
|
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| 430 | sp->sid = fast_strtoul_10(&cp);
|
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| 431 | tty = fast_strtoul_10(&cp);
|
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| 432 | sp->tty_major = (tty >> 8) & 0xfff;
|
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| 433 | sp->tty_minor = (tty & 0xff) | ((tty >> 12) & 0xfff00);
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| 434 | cp = skip_fields(cp, 6); /* tpgid, flags, min_flt, cmin_flt, maj_flt, cmaj_flt */
|
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| 435 | sp->utime = fast_strtoul_10(&cp);
|
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| 436 | sp->stime = fast_strtoul_10(&cp);
|
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| 437 | cp = skip_fields(cp, 3); /* cutime, cstime, priority */
|
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| 438 | tasknice = fast_strtol_10(&cp);
|
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| 439 | cp = skip_fields(cp, 2); /* timeout, it_real_value */
|
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| 440 | sp->start_time = fast_strtoul_10(&cp);
|
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| 441 | /* vsz is in bytes and we want kb */
|
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| 442 | sp->vsz = fast_strtoul_10(&cp) >> 10;
|
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| 443 | /* vsz is in bytes but rss is in *PAGES*! Can you believe that? */
|
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| 444 | sp->rss = fast_strtoul_10(&cp) << sp->shift_pages_to_kb;
|
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| 445 | # if ENABLE_FEATURE_TOP_SMP_PROCESS
|
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| 446 | /* (6): rss_rlim, start_code, end_code, start_stack, kstk_esp, kstk_eip */
|
---|
| 447 | /* (4): signal, blocked, sigignore, sigcatch */
|
---|
| 448 | /* (4): wchan, nswap, cnswap, exit_signal */
|
---|
| 449 | cp = skip_fields(cp, 14);
|
---|
| 450 | //FIXME: is it safe to assume this field exists?
|
---|
| 451 | sp->last_seen_on_cpu = fast_strtoul_10(&cp);
|
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| 452 | # endif
|
---|
| 453 | #endif /* FEATURE_FAST_TOP */
|
---|
| 454 |
|
---|
| 455 | #if ENABLE_FEATURE_PS_ADDITIONAL_COLUMNS
|
---|
| 456 | sp->niceness = tasknice;
|
---|
| 457 | #endif
|
---|
| 458 |
|
---|
| 459 | if (sp->vsz == 0 && sp->state[0] != 'Z')
|
---|
| 460 | sp->state[1] = 'W';
|
---|
| 461 | else
|
---|
| 462 | sp->state[1] = ' ';
|
---|
| 463 | if (tasknice < 0)
|
---|
| 464 | sp->state[2] = '<';
|
---|
| 465 | else if (tasknice) /* > 0 */
|
---|
| 466 | sp->state[2] = 'N';
|
---|
| 467 | else
|
---|
| 468 | sp->state[2] = ' ';
|
---|
| 469 | }
|
---|
| 470 |
|
---|
| 471 | #if ENABLE_FEATURE_TOPMEM
|
---|
| 472 | if (flags & PSSCAN_SMAPS)
|
---|
| 473 | procps_read_smaps(pid, &sp->smaps, NULL, NULL);
|
---|
| 474 | #endif /* TOPMEM */
|
---|
| 475 | #if ENABLE_FEATURE_PS_ADDITIONAL_COLUMNS
|
---|
| 476 | if (flags & PSSCAN_RUIDGID) {
|
---|
| 477 | FILE *file;
|
---|
| 478 |
|
---|
| 479 | strcpy(filename_tail, "status");
|
---|
| 480 | file = fopen_for_read(filename);
|
---|
| 481 | if (file) {
|
---|
| 482 | while (fgets(buf, sizeof(buf), file)) {
|
---|
| 483 | char *tp;
|
---|
| 484 | #define SCAN_TWO(str, name, statement) \
|
---|
| 485 | if (strncmp(buf, str, sizeof(str)-1) == 0) { \
|
---|
| 486 | tp = skip_whitespace(buf + sizeof(str)-1); \
|
---|
| 487 | sscanf(tp, "%u", &sp->name); \
|
---|
| 488 | statement; \
|
---|
| 489 | }
|
---|
| 490 | SCAN_TWO("Uid:", ruid, continue);
|
---|
| 491 | SCAN_TWO("Gid:", rgid, break);
|
---|
| 492 | #undef SCAN_TWO
|
---|
| 493 | }
|
---|
| 494 | fclose(file);
|
---|
| 495 | }
|
---|
| 496 | }
|
---|
| 497 | #endif /* PS_ADDITIONAL_COLUMNS */
|
---|
| 498 | if (flags & PSSCAN_EXE) {
|
---|
| 499 | strcpy(filename_tail, "exe");
|
---|
| 500 | free(sp->exe);
|
---|
| 501 | sp->exe = xmalloc_readlink(filename);
|
---|
| 502 | }
|
---|
| 503 | /* Note: if /proc/PID/cmdline is empty,
|
---|
| 504 | * code below "breaks". Therefore it must be
|
---|
| 505 | * the last code to parse /proc/PID/xxx data
|
---|
| 506 | * (we used to have /proc/PID/exe parsing after it
|
---|
| 507 | * and were getting stale sp->exe).
|
---|
| 508 | */
|
---|
| 509 | #if 0 /* PSSCAN_CMD is not used */
|
---|
| 510 | if (flags & (PSSCAN_CMD|PSSCAN_ARGV0)) {
|
---|
| 511 | free(sp->argv0);
|
---|
| 512 | sp->argv0 = NULL;
|
---|
| 513 | free(sp->cmd);
|
---|
| 514 | sp->cmd = NULL;
|
---|
| 515 | strcpy(filename_tail, "cmdline");
|
---|
| 516 | /* TODO: to get rid of size limits, read into malloc buf,
|
---|
| 517 | * then realloc it down to real size. */
|
---|
| 518 | n = read_to_buf(filename, buf);
|
---|
| 519 | if (n <= 0)
|
---|
| 520 | break;
|
---|
| 521 | if (flags & PSSCAN_ARGV0)
|
---|
| 522 | sp->argv0 = xstrdup(buf);
|
---|
| 523 | if (flags & PSSCAN_CMD) {
|
---|
| 524 | do {
|
---|
| 525 | n--;
|
---|
| 526 | if ((unsigned char)(buf[n]) < ' ')
|
---|
| 527 | buf[n] = ' ';
|
---|
| 528 | } while (n);
|
---|
| 529 | sp->cmd = xstrdup(buf);
|
---|
| 530 | }
|
---|
| 531 | }
|
---|
| 532 | #else
|
---|
| 533 | if (flags & (PSSCAN_ARGV0|PSSCAN_ARGVN)) {
|
---|
| 534 | free(sp->argv0);
|
---|
| 535 | sp->argv0 = NULL;
|
---|
| 536 | strcpy(filename_tail, "cmdline");
|
---|
| 537 | n = read_to_buf(filename, buf);
|
---|
| 538 | if (n <= 0)
|
---|
| 539 | break;
|
---|
| 540 | if (flags & PSSCAN_ARGVN) {
|
---|
| 541 | sp->argv_len = n;
|
---|
| 542 | sp->argv0 = xmalloc(n + 1);
|
---|
| 543 | memcpy(sp->argv0, buf, n + 1);
|
---|
| 544 | /* sp->argv0[n] = '\0'; - buf has it */
|
---|
| 545 | } else {
|
---|
| 546 | sp->argv_len = 0;
|
---|
| 547 | sp->argv0 = xstrdup(buf);
|
---|
| 548 | }
|
---|
| 549 | }
|
---|
| 550 | #endif
|
---|
| 551 | break;
|
---|
| 552 | } /* for (;;) */
|
---|
| 553 |
|
---|
| 554 | return sp;
|
---|
| 555 | }
|
---|
| 556 |
|
---|
| 557 | void FAST_FUNC read_cmdline(char *buf, int col, unsigned pid, const char *comm)
|
---|
| 558 | {
|
---|
| 559 | int sz;
|
---|
| 560 | char filename[sizeof("/proc//cmdline") + sizeof(int)*3];
|
---|
| 561 |
|
---|
| 562 | sprintf(filename, "/proc/%u/cmdline", pid);
|
---|
| 563 | sz = open_read_close(filename, buf, col - 1);
|
---|
| 564 | if (sz > 0) {
|
---|
| 565 | buf[sz] = '\0';
|
---|
| 566 | while (--sz >= 0 && buf[sz] == '\0')
|
---|
| 567 | continue;
|
---|
| 568 | do {
|
---|
| 569 | if ((unsigned char)(buf[sz]) < ' ')
|
---|
| 570 | buf[sz] = ' ';
|
---|
| 571 | } while (--sz >= 0);
|
---|
| 572 | } else {
|
---|
| 573 | snprintf(buf, col, "[%s]", comm);
|
---|
| 574 | }
|
---|
| 575 | }
|
---|
| 576 |
|
---|
| 577 | /* from kernel:
|
---|
| 578 | // pid comm S ppid pgid sid tty_nr tty_pgrp flg
|
---|
| 579 | sprintf(buffer,"%d (%s) %c %d %d %d %d %d %lu %lu \
|
---|
| 580 | %lu %lu %lu %lu %lu %ld %ld %ld %ld %d 0 %llu %lu %ld %lu %lu %lu %lu %lu \
|
---|
| 581 | %lu %lu %lu %lu %lu %lu %lu %lu %d %d %lu %lu %llu\n",
|
---|
| 582 | task->pid,
|
---|
| 583 | tcomm,
|
---|
| 584 | state,
|
---|
| 585 | ppid,
|
---|
| 586 | pgid,
|
---|
| 587 | sid,
|
---|
| 588 | tty_nr,
|
---|
| 589 | tty_pgrp,
|
---|
| 590 | task->flags,
|
---|
| 591 | min_flt,
|
---|
| 592 | cmin_flt,
|
---|
| 593 | maj_flt,
|
---|
| 594 | cmaj_flt,
|
---|
| 595 | cputime_to_clock_t(utime),
|
---|
| 596 | cputime_to_clock_t(stime),
|
---|
| 597 | cputime_to_clock_t(cutime),
|
---|
| 598 | cputime_to_clock_t(cstime),
|
---|
| 599 | priority,
|
---|
| 600 | nice,
|
---|
| 601 | num_threads,
|
---|
| 602 | // 0,
|
---|
| 603 | start_time,
|
---|
| 604 | vsize,
|
---|
| 605 | mm ? get_mm_rss(mm) : 0,
|
---|
| 606 | rsslim,
|
---|
| 607 | mm ? mm->start_code : 0,
|
---|
| 608 | mm ? mm->end_code : 0,
|
---|
| 609 | mm ? mm->start_stack : 0,
|
---|
| 610 | esp,
|
---|
| 611 | eip,
|
---|
| 612 | the rest is some obsolete cruft
|
---|
| 613 | */
|
---|