Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 1 | /* vi: set sw=4 ts=4: */ |
Eric Andersen | ef8b6c7 | 1999-10-20 08:05:35 +0000 | [diff] [blame] | 2 | /* |
Erik Andersen | 246cc6d | 2000-03-07 07:41:42 +0000 | [diff] [blame] | 3 | * Mini ps implementation(s) for busybox |
| 4 | * |
Erik Andersen | 61677fe | 2000-04-13 01:18:56 +0000 | [diff] [blame] | 5 | * Copyright (C) 1999,2000 by Lineo, inc. Written by Erik Andersen |
Erik Andersen | 246cc6d | 2000-03-07 07:41:42 +0000 | [diff] [blame] | 6 | * <andersen@lineo.com>, <andersee@debian.org> |
Eric Andersen | ef8b6c7 | 1999-10-20 08:05:35 +0000 | [diff] [blame] | 7 | * |
Eric Andersen | c499601 | 1999-10-20 22:08:37 +0000 | [diff] [blame] | 8 | * |
Erik Andersen | 246cc6d | 2000-03-07 07:41:42 +0000 | [diff] [blame] | 9 | * This contains _two_ implementations of ps for Linux. One uses the |
| 10 | * traditional /proc virtual filesystem, and the other use the devps kernel |
| 11 | * driver (written by Erik Andersen to avoid using /proc thereby saving 100k+). |
Eric Andersen | ef8b6c7 | 1999-10-20 08:05:35 +0000 | [diff] [blame] | 12 | * |
Eric Andersen | ef8b6c7 | 1999-10-20 08:05:35 +0000 | [diff] [blame] | 13 | * |
Eric Andersen | ef8b6c7 | 1999-10-20 08:05:35 +0000 | [diff] [blame] | 14 | * |
Erik Andersen | 246cc6d | 2000-03-07 07:41:42 +0000 | [diff] [blame] | 15 | * This program is free software; you can redistribute it and/or modify it |
| 16 | * under the terms of the GNU General Public License as published by the Free |
| 17 | * Software Foundation; either version 2 of the License, or (at your option) |
| 18 | * any later version. |
| 19 | * |
| 20 | * This program is distributed in the hope that it will be useful, but WITHOUT |
| 21 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 22 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for |
| 23 | * more details. |
| 24 | * |
| 25 | * You should have received a copy of the GNU General Public License along with |
| 26 | * this program; if not, write to the Free Software Foundation, Inc., 59 Temple |
| 27 | * Place, Suite 330, Boston, MA 02111-1307 USA |
Eric Andersen | ef8b6c7 | 1999-10-20 08:05:35 +0000 | [diff] [blame] | 28 | * |
| 29 | */ |
| 30 | |
| 31 | #include "internal.h" |
Erik Andersen | 246cc6d | 2000-03-07 07:41:42 +0000 | [diff] [blame] | 32 | #include <stdio.h> |
Eric Andersen | ef8b6c7 | 1999-10-20 08:05:35 +0000 | [diff] [blame] | 33 | #include <unistd.h> |
| 34 | #include <dirent.h> |
Erik Andersen | 246cc6d | 2000-03-07 07:41:42 +0000 | [diff] [blame] | 35 | #include <errno.h> |
Eric Andersen | d23f9ba | 1999-10-20 19:18:15 +0000 | [diff] [blame] | 36 | #include <fcntl.h> |
| 37 | #include <ctype.h> |
Erik Andersen | 2ac2fae | 2000-03-07 23:32:17 +0000 | [diff] [blame] | 38 | #include <sys/ioctl.h> |
| 39 | |
Eric Andersen | d23f9ba | 1999-10-20 19:18:15 +0000 | [diff] [blame] | 40 | |
Erik Andersen | 269bba2 | 2000-03-08 14:50:47 +0000 | [diff] [blame] | 41 | #if ! defined BB_FEATURE_USE_DEVPS_PATCH |
Erik Andersen | 246cc6d | 2000-03-07 07:41:42 +0000 | [diff] [blame] | 42 | |
| 43 | /* The following is the first ps implementation -- |
| 44 | * the one using the /proc virtual filesystem. |
| 45 | */ |
| 46 | |
Eric Andersen | 0ecb54a | 1999-12-05 23:24:55 +0000 | [diff] [blame] | 47 | #if ! defined BB_FEATURE_USE_PROCFS |
| 48 | #error Sorry, I depend on the /proc filesystem right now. |
| 49 | #endif |
Eric Andersen | d23f9ba | 1999-10-20 19:18:15 +0000 | [diff] [blame] | 50 | |
| 51 | typedef struct proc_s { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 52 | char |
| 53 | cmd[16]; /* basename of executable file in call to exec(2) */ |
| 54 | int |
| 55 | ruid, rgid, /* real only (sorry) */ |
| 56 | pid, /* process id */ |
| 57 | ppid; /* pid of parent process */ |
| 58 | char |
| 59 | state; /* single-char code for process state (S=sleeping) */ |
Eric Andersen | d23f9ba | 1999-10-20 19:18:15 +0000 | [diff] [blame] | 60 | } proc_t; |
| 61 | |
| 62 | |
| 63 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 64 | static int file2str(char *filename, char *ret, int cap) |
Eric Andersen | d23f9ba | 1999-10-20 19:18:15 +0000 | [diff] [blame] | 65 | { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 66 | int fd, num_read; |
Eric Andersen | d23f9ba | 1999-10-20 19:18:15 +0000 | [diff] [blame] | 67 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 68 | if ((fd = open(filename, O_RDONLY, 0)) == -1) |
| 69 | return -1; |
| 70 | if ((num_read = read(fd, ret, cap - 1)) <= 0) |
| 71 | return -1; |
| 72 | ret[num_read] = 0; |
| 73 | close(fd); |
| 74 | return num_read; |
Eric Andersen | d23f9ba | 1999-10-20 19:18:15 +0000 | [diff] [blame] | 75 | } |
| 76 | |
| 77 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 78 | static void parse_proc_status(char *S, proc_t * P) |
Eric Andersen | d23f9ba | 1999-10-20 19:18:15 +0000 | [diff] [blame] | 79 | { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 80 | char *tmp; |
Eric Andersen | d23f9ba | 1999-10-20 19:18:15 +0000 | [diff] [blame] | 81 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 82 | memset(P->cmd, 0, sizeof P->cmd); |
| 83 | sscanf(S, "Name:\t%15c", P->cmd); |
| 84 | tmp = strchr(P->cmd, '\n'); |
| 85 | if (tmp) |
| 86 | *tmp = '\0'; |
| 87 | tmp = strstr(S, "State"); |
| 88 | sscanf(tmp, "State:\t%c", &P->state); |
Eric Andersen | d23f9ba | 1999-10-20 19:18:15 +0000 | [diff] [blame] | 89 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 90 | tmp = strstr(S, "Pid:"); |
| 91 | if (tmp) |
| 92 | sscanf(tmp, "Pid:\t%d\n" "PPid:\t%d\n", &P->pid, &P->ppid); |
| 93 | else |
| 94 | fprintf(stderr, "Internal error!\n"); |
Eric Andersen | d23f9ba | 1999-10-20 19:18:15 +0000 | [diff] [blame] | 95 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 96 | /* For busybox, ignoring effective, saved, etc */ |
| 97 | tmp = strstr(S, "Uid:"); |
| 98 | if (tmp) |
| 99 | sscanf(tmp, "Uid:\t%d", &P->ruid); |
| 100 | else |
| 101 | fprintf(stderr, "Internal error!\n"); |
| 102 | |
| 103 | tmp = strstr(S, "Gid:"); |
| 104 | if (tmp) |
| 105 | sscanf(tmp, "Gid:\t%d", &P->rgid); |
| 106 | else |
| 107 | fprintf(stderr, "Internal error!\n"); |
Eric Andersen | d23f9ba | 1999-10-20 19:18:15 +0000 | [diff] [blame] | 108 | |
| 109 | } |
Eric Andersen | ef8b6c7 | 1999-10-20 08:05:35 +0000 | [diff] [blame] | 110 | |
| 111 | |
| 112 | extern int ps_main(int argc, char **argv) |
| 113 | { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 114 | proc_t p; |
| 115 | DIR *dir; |
| 116 | FILE *file; |
| 117 | struct dirent *entry; |
| 118 | char path[32], sbuf[512]; |
| 119 | char uidName[10] = ""; |
| 120 | char groupName[10] = ""; |
Erik Andersen | 2ac2fae | 2000-03-07 23:32:17 +0000 | [diff] [blame] | 121 | int len, i, c; |
| 122 | #ifdef BB_FEATURE_AUTOWIDTH |
| 123 | struct winsize win = { 0, 0 }; |
| 124 | int terminal_width = 0; |
| 125 | #else |
| 126 | #define terminal_width 79 |
| 127 | #endif |
| 128 | |
| 129 | |
Eric Andersen | ef8b6c7 | 1999-10-20 08:05:35 +0000 | [diff] [blame] | 130 | |
Erik Andersen | a3e57ca | 2000-04-19 03:38:01 +0000 | [diff] [blame] | 131 | if (argc > 1 && strcmp(argv[1], "--help") == 0) { |
Erik Andersen | 246cc6d | 2000-03-07 07:41:42 +0000 | [diff] [blame] | 132 | usage ("ps\n\nReport process status\n\nThis version of ps accepts no options.\n"); |
Erik Andersen | a3e57ca | 2000-04-19 03:38:01 +0000 | [diff] [blame] | 133 | } |
Eric Andersen | ef8b6c7 | 1999-10-20 08:05:35 +0000 | [diff] [blame] | 134 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 135 | dir = opendir("/proc"); |
Erik Andersen | 246cc6d | 2000-03-07 07:41:42 +0000 | [diff] [blame] | 136 | if (!dir) |
| 137 | fatalError("Can't open /proc"); |
Eric Andersen | d23f9ba | 1999-10-20 19:18:15 +0000 | [diff] [blame] | 138 | |
Erik Andersen | 2ac2fae | 2000-03-07 23:32:17 +0000 | [diff] [blame] | 139 | #ifdef BB_FEATURE_AUTOWIDTH |
| 140 | ioctl(fileno(stdout), TIOCGWINSZ, &win); |
| 141 | if (win.ws_col > 0) |
| 142 | terminal_width = win.ws_col - 1; |
| 143 | #endif |
| 144 | |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 145 | fprintf(stdout, "%5s %-8s %-3s %5s %s\n", "PID", "Uid", "Gid", |
| 146 | "State", "Command"); |
| 147 | while ((entry = readdir(dir)) != NULL) { |
| 148 | uidName[0] = '\0'; |
| 149 | groupName[0] = '\0'; |
| 150 | |
| 151 | if (!isdigit(*entry->d_name)) |
| 152 | continue; |
| 153 | sprintf(path, "/proc/%s/status", entry->d_name); |
| 154 | if ((file2str(path, sbuf, sizeof sbuf)) != -1) { |
| 155 | parse_proc_status(sbuf, &p); |
| 156 | } |
| 157 | |
| 158 | /* Make some adjustments as needed */ |
| 159 | my_getpwuid(uidName, p.ruid); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 160 | if (*uidName == '\0') |
| 161 | sprintf(uidName, "%d", p.ruid); |
Erik Andersen | 246cc6d | 2000-03-07 07:41:42 +0000 | [diff] [blame] | 162 | my_getgrgid(groupName, p.rgid); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 163 | if (*groupName == '\0') |
| 164 | sprintf(groupName, "%d", p.rgid); |
| 165 | |
Erik Andersen | 2ac2fae | 2000-03-07 23:32:17 +0000 | [diff] [blame] | 166 | len = fprintf(stdout, "%5d %-8s %-8s %c ", p.pid, uidName, groupName, |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 167 | p.state); |
| 168 | sprintf(path, "/proc/%s/cmdline", entry->d_name); |
| 169 | file = fopen(path, "r"); |
Erik Andersen | 246cc6d | 2000-03-07 07:41:42 +0000 | [diff] [blame] | 170 | if (file == NULL) |
| 171 | fatalError("Can't open %s: %s\n", path, strerror(errno)); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 172 | i = 0; |
Erik Andersen | 2ac2fae | 2000-03-07 23:32:17 +0000 | [diff] [blame] | 173 | while (((c = getc(file)) != EOF) && (i < (terminal_width-len))) { |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 174 | i++; |
| 175 | if (c == '\0') |
| 176 | c = ' '; |
| 177 | putc(c, stdout); |
| 178 | } |
| 179 | if (i == 0) |
Erik Andersen | 2ac2fae | 2000-03-07 23:32:17 +0000 | [diff] [blame] | 180 | fprintf(stdout, "[%s]", p.cmd); |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 181 | fprintf(stdout, "\n"); |
Eric Andersen | d23f9ba | 1999-10-20 19:18:15 +0000 | [diff] [blame] | 182 | } |
Erik Andersen | e49d5ec | 2000-02-08 19:58:47 +0000 | [diff] [blame] | 183 | closedir(dir); |
| 184 | exit(TRUE); |
Eric Andersen | ef8b6c7 | 1999-10-20 08:05:35 +0000 | [diff] [blame] | 185 | } |
Erik Andersen | 246cc6d | 2000-03-07 07:41:42 +0000 | [diff] [blame] | 186 | |
| 187 | |
Erik Andersen | 269bba2 | 2000-03-08 14:50:47 +0000 | [diff] [blame] | 188 | #else /* BB_FEATURE_USE_DEVPS_PATCH */ |
Erik Andersen | 246cc6d | 2000-03-07 07:41:42 +0000 | [diff] [blame] | 189 | |
| 190 | |
| 191 | /* The following is the second ps implementation -- |
| 192 | * this one uses the nifty new devps kernel device. |
| 193 | */ |
| 194 | |
Erik Andersen | 246cc6d | 2000-03-07 07:41:42 +0000 | [diff] [blame] | 195 | #include <linux/devps.h> |
| 196 | |
| 197 | |
| 198 | extern int ps_main(int argc, char **argv) |
| 199 | { |
| 200 | char device[] = "/dev/ps"; |
Erik Andersen | 2ac2fae | 2000-03-07 23:32:17 +0000 | [diff] [blame] | 201 | int i, j, len, fd; |
Erik Andersen | 246cc6d | 2000-03-07 07:41:42 +0000 | [diff] [blame] | 202 | pid_t num_pids; |
| 203 | pid_t* pid_array = NULL; |
| 204 | struct pid_info info; |
| 205 | char uidName[10] = ""; |
| 206 | char groupName[10] = ""; |
Erik Andersen | 2ac2fae | 2000-03-07 23:32:17 +0000 | [diff] [blame] | 207 | #ifdef BB_FEATURE_AUTOWIDTH |
| 208 | struct winsize win = { 0, 0 }; |
| 209 | int terminal_width = 0; |
| 210 | #else |
| 211 | #define terminal_width 79 |
| 212 | #endif |
Erik Andersen | 246cc6d | 2000-03-07 07:41:42 +0000 | [diff] [blame] | 213 | |
| 214 | if (argc > 1 && **(argv + 1) == '-') |
| 215 | usage("ps-devps\n\nReport process status\n\nThis version of ps accepts no options.\n\n"); |
| 216 | |
| 217 | /* open device */ |
| 218 | fd = open(device, O_RDONLY); |
| 219 | if (fd < 0) |
| 220 | fatalError( "open failed for `%s': %s\n", device, strerror (errno)); |
| 221 | |
| 222 | /* Find out how many processes there are */ |
| 223 | if (ioctl (fd, DEVPS_GET_NUM_PIDS, &num_pids)<0) |
| 224 | fatalError( "\nDEVPS_GET_PID_LIST: %s\n", strerror (errno)); |
| 225 | |
| 226 | /* Allocate some memory -- grab a few extras just in case |
| 227 | * some new processes start up while we wait. The kernel will |
| 228 | * just ignore any extras if we give it too many, and will trunc. |
| 229 | * the list if we give it too few. */ |
| 230 | pid_array = (pid_t*) calloc( num_pids+10, sizeof(pid_t)); |
| 231 | pid_array[0] = num_pids+10; |
| 232 | |
| 233 | /* Now grab the pid list */ |
| 234 | if (ioctl (fd, DEVPS_GET_PID_LIST, pid_array)<0) |
| 235 | fatalError("\nDEVPS_GET_PID_LIST: %s\n", strerror (errno)); |
| 236 | |
Erik Andersen | 2ac2fae | 2000-03-07 23:32:17 +0000 | [diff] [blame] | 237 | #ifdef BB_FEATURE_AUTOWIDTH |
| 238 | ioctl(fileno(stdout), TIOCGWINSZ, &win); |
| 239 | if (win.ws_col > 0) |
| 240 | terminal_width = win.ws_col - 1; |
| 241 | #endif |
| 242 | |
Erik Andersen | 246cc6d | 2000-03-07 07:41:42 +0000 | [diff] [blame] | 243 | /* Print up a ps listing */ |
| 244 | fprintf(stdout, "%5s %-8s %-3s %5s %s\n", "PID", "Uid", "Gid", |
| 245 | "State", "Command"); |
| 246 | |
| 247 | for (i=1; i<pid_array[0] ; i++) { |
| 248 | uidName[0] = '\0'; |
| 249 | groupName[0] = '\0'; |
| 250 | info.pid = pid_array[i]; |
| 251 | |
| 252 | if (ioctl (fd, DEVPS_GET_PID_INFO, &info)<0) |
| 253 | fatalError("\nDEVPS_GET_PID_INFO: %s\n", strerror (errno)); |
| 254 | |
| 255 | /* Make some adjustments as needed */ |
| 256 | my_getpwuid(uidName, info.euid); |
| 257 | if (*uidName == '\0') |
| 258 | sprintf(uidName, "%ld", info.euid); |
| 259 | my_getgrgid(groupName, info.egid); |
| 260 | if (*groupName == '\0') |
| 261 | sprintf(groupName, "%ld", info.egid); |
| 262 | |
Erik Andersen | 2ac2fae | 2000-03-07 23:32:17 +0000 | [diff] [blame] | 263 | len = fprintf(stdout, "%5d %-8s %-8s %c ", info.pid, uidName, groupName, info.state); |
Erik Andersen | 246cc6d | 2000-03-07 07:41:42 +0000 | [diff] [blame] | 264 | |
Erik Andersen | 2ac2fae | 2000-03-07 23:32:17 +0000 | [diff] [blame] | 265 | if (strlen(info.command_line) > 1) { |
| 266 | for( j=0; j<(sizeof(info.command_line)-1) && j < (terminal_width-len); j++) { |
| 267 | if (*(info.command_line+j) == '\0' && *(info.command_line+j+1) != '\0') { |
| 268 | *(info.command_line+j) = ' '; |
| 269 | } |
| 270 | } |
| 271 | *(info.command_line+j) = '\0'; |
Erik Andersen | 246cc6d | 2000-03-07 07:41:42 +0000 | [diff] [blame] | 272 | fprintf(stdout, "%s\n", info.command_line); |
Erik Andersen | 2ac2fae | 2000-03-07 23:32:17 +0000 | [diff] [blame] | 273 | } else { |
Erik Andersen | 246cc6d | 2000-03-07 07:41:42 +0000 | [diff] [blame] | 274 | fprintf(stdout, "[%s]\n", info.name); |
Erik Andersen | 2ac2fae | 2000-03-07 23:32:17 +0000 | [diff] [blame] | 275 | } |
Erik Andersen | 246cc6d | 2000-03-07 07:41:42 +0000 | [diff] [blame] | 276 | } |
| 277 | |
| 278 | /* Free memory */ |
| 279 | free( pid_array); |
| 280 | |
| 281 | /* close device */ |
| 282 | if (close (fd) != 0) |
| 283 | fatalError("close failed for `%s': %s\n", device, strerror (errno)); |
| 284 | |
| 285 | exit (0); |
| 286 | } |
| 287 | |
Erik Andersen | 269bba2 | 2000-03-08 14:50:47 +0000 | [diff] [blame] | 288 | #endif /* BB_FEATURE_USE_DEVPS_PATCH */ |
Erik Andersen | 246cc6d | 2000-03-07 07:41:42 +0000 | [diff] [blame] | 289 | |