/* vi: set sw=4 ts=4: */ /* * Utility routines. * * Copyright 1998 by Albert Cahalan; all rights reserved. * Copyright (C) 2002 by Vladimir Oleynik <dzo@simtreas.ru> * GNU Library General Public License Version 2, or any later version * */ #include <dirent.h> #include <string.h> #include <stdlib.h> #include <sys/param.h> #include <unistd.h> #include <fcntl.h> #include "libbb.h" #define PROCPS_BUFSIZE 1024 static int read_to_buf(const char *filename, void *buf) { int fd; ssize_t ret; fd = open(filename, O_RDONLY); if(fd < 0) return -1; ret = read(fd, buf, PROCPS_BUFSIZE); close(fd); return ret; } procps_status_t * procps_scan(int save_user_arg0) { static DIR *dir; struct dirent *entry; static procps_status_t ret_status; char *name; int n; char status[32]; char *status_tail; char buf[PROCPS_BUFSIZE]; procps_status_t curstatus; int pid; long tasknice; struct stat sb; if (!dir) { dir = bb_xopendir("/proc"); } for(;;) { if((entry = readdir(dir)) == NULL) { closedir(dir); dir = 0; return 0; } name = entry->d_name; if (!(*name >= '0' && *name <= '9')) continue; memset(&curstatus, 0, sizeof(procps_status_t)); pid = atoi(name); curstatus.pid = pid; status_tail = status + sprintf(status, "/proc/%d", pid); if(stat(status, &sb)) continue; bb_getpwuid(curstatus.user, sb.st_uid, sizeof(curstatus.user)); strcpy(status_tail, "/stat"); n = read_to_buf(status, buf); if(n < 0) continue; name = strrchr(buf, ')'); /* split into "PID (cmd" and "<rest>" */ if(name == 0 || name[1] != ' ') continue; *name = 0; sscanf(buf, "%*s (%15c", curstatus.short_cmd); n = sscanf(name+2, "%c %d " "%*s %*s %*s %*s " /* pgrp, session, tty, tpgid */ "%*s %*s %*s %*s %*s " /* flags, min_flt, cmin_flt, maj_flt, cmaj_flt */ #ifdef CONFIG_FEATURE_TOP_CPU_USAGE_PERCENTAGE "%lu %lu " #else "%*s %*s " #endif "%*s %*s %*s " /* cutime, cstime, priority */ "%ld " "%*s %*s %*s " /* timeout, it_real_value, start_time */ "%*s " /* vsize */ "%ld", curstatus.state, &curstatus.ppid, #ifdef CONFIG_FEATURE_TOP_CPU_USAGE_PERCENTAGE &curstatus.utime, &curstatus.stime, #endif &tasknice, &curstatus.rss); #ifdef CONFIG_FEATURE_TOP_CPU_USAGE_PERCENTAGE if(n != 6) #else if(n != 4) #endif continue; if (curstatus.rss == 0 && curstatus.state[0] != 'Z') curstatus.state[1] = 'W'; else curstatus.state[1] = ' '; if (tasknice < 0) curstatus.state[2] = '<'; else if (tasknice > 0) curstatus.state[2] = 'N'; else curstatus.state[2] = ' '; #ifdef PAGE_SHIFT curstatus.rss <<= (PAGE_SHIFT - 10); /* 2**10 = 1kb */ #else curstatus.rss *= (getpagesize() >> 10); /* 2**10 = 1kb */ #endif if(save_user_arg0) { strcpy(status_tail, "/cmdline"); n = read_to_buf(status, buf); if(n > 0) { if(buf[n-1]=='\n') buf[--n] = 0; name = buf; while(n) { if(((unsigned char)*name) < ' ') *name = ' '; name++; n--; } *name = 0; if(buf[0]) curstatus.cmd = strdup(buf); /* if NULL it work true also */ } } return memcpy(&ret_status, &curstatus, sizeof(procps_status_t)); } } /* END CODE */ /* Local Variables: c-file-style: "linux" c-basic-offset: 4 tab-width: 4 End: */