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>
8 * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
14 #include <sys/param.h>
21 #define PROCPS_BUFSIZE 1024
23 static int read_to_buf(const char *filename, void *buf)
26 ret = open_read_close(filename, buf, PROCPS_BUFSIZE-1);
27 ((char *)buf)[ret > 0 ? ret : 0] = '\0';
32 procps_status_t * procps_scan(int save_user_arg0)
36 static procps_status_t ret_status;
41 char buf[PROCPS_BUFSIZE];
42 procps_status_t curstatus;
48 dir = xopendir("/proc");
58 if (!(*name >= '0' && *name <= '9'))
61 memset(&curstatus, 0, sizeof(procps_status_t));
65 status_tail = status + sprintf(status, "/proc/%d", pid);
66 if (stat(status, &sb))
68 bb_getpwuid(curstatus.user, sb.st_uid, sizeof(curstatus.user));
70 /* see proc(5) for some details on this */
71 strcpy(status_tail, "/stat");
72 n = read_to_buf(status, buf);
75 name = strrchr(buf, ')'); /* split into "PID (cmd" and "<rest>" */
76 if (name == 0 || name[1] != ' ')
79 sscanf(buf, "%*s (%15c", curstatus.short_cmd);
82 "%*s %*s %*s %*s " /* pgrp, session, tty, tpgid */
83 "%*s %*s %*s %*s %*s " /* flags, min_flt, cmin_flt, maj_flt, cmaj_flt */
84 #ifdef CONFIG_FEATURE_TOP_CPU_USAGE_PERCENTAGE
85 "%lu %lu " /* utime, stime */
87 "%*s %*s " /* utime, stime */
89 "%*s %*s %*s " /* cutime, cstime, priority */
91 "%*s %*s %*s " /* timeout, it_real_value, start_time */
94 curstatus.state, &curstatus.ppid,
95 #ifdef CONFIG_FEATURE_TOP_CPU_USAGE_PERCENTAGE
96 &curstatus.utime, &curstatus.stime,
100 #ifdef CONFIG_FEATURE_TOP_CPU_USAGE_PERCENTAGE
107 if (curstatus.rss == 0 && curstatus.state[0] != 'Z')
108 curstatus.state[1] = 'W';
110 curstatus.state[1] = ' ';
112 curstatus.state[2] = '<';
113 else if (tasknice > 0)
114 curstatus.state[2] = 'N';
116 curstatus.state[2] = ' ';
119 curstatus.rss <<= (PAGE_SHIFT - 10); /* 2**10 = 1kb */
121 curstatus.rss *= (getpagesize() >> 10); /* 2**10 = 1kb */
124 if (save_user_arg0) {
125 strcpy(status_tail, "/cmdline");
126 n = read_to_buf(status, buf);
132 if (((unsigned char)*name) < ' ')
139 curstatus.cmd = strdup(buf);
140 /* if NULL it work true also */
143 return memcpy(&ret_status, &curstatus, sizeof(procps_status_t));