[821] | 1 | /* vi: set sw=4 ts=4: */
|
---|
| 2 | /*
|
---|
| 3 | * Utility routines.
|
---|
| 4 | *
|
---|
| 5 | * Copyright 1998 by Albert Cahalan; all rights reserved.
|
---|
| 6 | * Copyright (C) 2002 by Vladimir Oleynik <dzo@simtreas.ru>
|
---|
| 7 | *
|
---|
| 8 | * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
|
---|
| 9 | */
|
---|
| 10 |
|
---|
| 11 | #include <dirent.h>
|
---|
| 12 | #include <string.h>
|
---|
| 13 | #include <stdlib.h>
|
---|
| 14 | #include <sys/param.h>
|
---|
| 15 | #include <unistd.h>
|
---|
| 16 | #include <fcntl.h>
|
---|
| 17 |
|
---|
| 18 | #include "libbb.h"
|
---|
| 19 |
|
---|
| 20 |
|
---|
| 21 | #define PROCPS_BUFSIZE 1024
|
---|
| 22 |
|
---|
| 23 | static int read_to_buf(const char *filename, void *buf)
|
---|
| 24 | {
|
---|
| 25 | int fd;
|
---|
| 26 | ssize_t ret;
|
---|
| 27 |
|
---|
| 28 | fd = open(filename, O_RDONLY);
|
---|
| 29 | if(fd < 0)
|
---|
| 30 | return -1;
|
---|
| 31 | ret = read(fd, buf, PROCPS_BUFSIZE-1);
|
---|
| 32 | ((char *)buf)[ret > 0 ? ret : 0] = 0;
|
---|
| 33 | close(fd);
|
---|
| 34 | return ret;
|
---|
| 35 | }
|
---|
| 36 |
|
---|
| 37 |
|
---|
| 38 | procps_status_t * procps_scan(int save_user_arg0)
|
---|
| 39 | {
|
---|
| 40 | static DIR *dir;
|
---|
| 41 | struct dirent *entry;
|
---|
| 42 | static procps_status_t ret_status;
|
---|
| 43 | char *name;
|
---|
| 44 | int n;
|
---|
| 45 | char status[32];
|
---|
| 46 | char *status_tail;
|
---|
| 47 | char buf[PROCPS_BUFSIZE];
|
---|
| 48 | procps_status_t curstatus;
|
---|
| 49 | int pid;
|
---|
| 50 | long tasknice;
|
---|
| 51 | struct stat sb;
|
---|
| 52 |
|
---|
| 53 | if (!dir) {
|
---|
| 54 | dir = bb_xopendir("/proc");
|
---|
| 55 | }
|
---|
| 56 | for(;;) {
|
---|
| 57 | if((entry = readdir(dir)) == NULL) {
|
---|
| 58 | closedir(dir);
|
---|
| 59 | dir = 0;
|
---|
| 60 | return 0;
|
---|
| 61 | }
|
---|
| 62 | name = entry->d_name;
|
---|
| 63 | if (!(*name >= '0' && *name <= '9'))
|
---|
| 64 | continue;
|
---|
| 65 |
|
---|
| 66 | memset(&curstatus, 0, sizeof(procps_status_t));
|
---|
| 67 | pid = atoi(name);
|
---|
| 68 | curstatus.pid = pid;
|
---|
| 69 |
|
---|
| 70 | status_tail = status + sprintf(status, "/proc/%d", pid);
|
---|
| 71 | if(stat(status, &sb))
|
---|
| 72 | continue;
|
---|
| 73 | bb_getpwuid(curstatus.user, sb.st_uid, sizeof(curstatus.user));
|
---|
| 74 |
|
---|
| 75 | /* see proc(5) for some details on this */
|
---|
| 76 | strcpy(status_tail, "/stat");
|
---|
| 77 | n = read_to_buf(status, buf);
|
---|
| 78 | if(n < 0)
|
---|
| 79 | continue;
|
---|
| 80 | name = strrchr(buf, ')'); /* split into "PID (cmd" and "<rest>" */
|
---|
| 81 | if(name == 0 || name[1] != ' ')
|
---|
| 82 | continue;
|
---|
| 83 | *name = 0;
|
---|
| 84 | sscanf(buf, "%*s (%15c", curstatus.short_cmd);
|
---|
| 85 | n = sscanf(name+2,
|
---|
| 86 | "%c %d "
|
---|
| 87 | "%*s %*s %*s %*s " /* pgrp, session, tty, tpgid */
|
---|
| 88 | "%*s %*s %*s %*s %*s " /* flags, min_flt, cmin_flt, maj_flt, cmaj_flt */
|
---|
| 89 | #ifdef CONFIG_FEATURE_TOP_CPU_USAGE_PERCENTAGE
|
---|
| 90 | "%lu %lu " /* utime, stime */
|
---|
| 91 | #else
|
---|
| 92 | "%*s %*s " /* utime, stime */
|
---|
| 93 | #endif
|
---|
| 94 | "%*s %*s %*s " /* cutime, cstime, priority */
|
---|
| 95 | "%ld " /* nice */
|
---|
| 96 | "%*s %*s %*s " /* timeout, it_real_value, start_time */
|
---|
| 97 | "%*s " /* vsize */
|
---|
| 98 | "%ld", /* rss */
|
---|
| 99 | curstatus.state, &curstatus.ppid,
|
---|
| 100 | #ifdef CONFIG_FEATURE_TOP_CPU_USAGE_PERCENTAGE
|
---|
| 101 | &curstatus.utime, &curstatus.stime,
|
---|
| 102 | #endif
|
---|
| 103 | &tasknice,
|
---|
| 104 | &curstatus.rss);
|
---|
| 105 | #ifdef CONFIG_FEATURE_TOP_CPU_USAGE_PERCENTAGE
|
---|
| 106 | if(n != 6)
|
---|
| 107 | #else
|
---|
| 108 | if(n != 4)
|
---|
| 109 | #endif
|
---|
| 110 | continue;
|
---|
| 111 |
|
---|
| 112 | if (curstatus.rss == 0 && curstatus.state[0] != 'Z')
|
---|
| 113 | curstatus.state[1] = 'W';
|
---|
| 114 | else
|
---|
| 115 | curstatus.state[1] = ' ';
|
---|
| 116 | if (tasknice < 0)
|
---|
| 117 | curstatus.state[2] = '<';
|
---|
| 118 | else if (tasknice > 0)
|
---|
| 119 | curstatus.state[2] = 'N';
|
---|
| 120 | else
|
---|
| 121 | curstatus.state[2] = ' ';
|
---|
| 122 |
|
---|
| 123 | #ifdef PAGE_SHIFT
|
---|
| 124 | curstatus.rss <<= (PAGE_SHIFT - 10); /* 2**10 = 1kb */
|
---|
| 125 | #else
|
---|
| 126 | curstatus.rss *= (getpagesize() >> 10); /* 2**10 = 1kb */
|
---|
| 127 | #endif
|
---|
| 128 |
|
---|
| 129 | if(save_user_arg0) {
|
---|
| 130 | strcpy(status_tail, "/cmdline");
|
---|
| 131 | n = read_to_buf(status, buf);
|
---|
| 132 | if(n > 0) {
|
---|
| 133 | if(buf[n-1]=='\n')
|
---|
| 134 | buf[--n] = 0;
|
---|
| 135 | name = buf;
|
---|
| 136 | while(n) {
|
---|
| 137 | if(((unsigned char)*name) < ' ')
|
---|
| 138 | *name = ' ';
|
---|
| 139 | name++;
|
---|
| 140 | n--;
|
---|
| 141 | }
|
---|
| 142 | *name = 0;
|
---|
| 143 | if(buf[0])
|
---|
| 144 | curstatus.cmd = strdup(buf);
|
---|
| 145 | /* if NULL it work true also */
|
---|
| 146 | }
|
---|
| 147 | }
|
---|
| 148 | return memcpy(&ret_status, &curstatus, sizeof(procps_status_t));
|
---|
| 149 | }
|
---|
| 150 | }
|
---|