| 1 | /* $NetBSD: who.c,v 1.22 2008/07/21 14:19:28 lukem Exp $ */ |
| 2 | |
| 3 | /* |
| 4 | * Copyright (c) 1989, 1993 |
| 5 | * The Regents of the University of California. All rights reserved. |
| 6 | * |
| 7 | * This code is derived from software contributed to Berkeley by |
| 8 | * Michael Fischbein. |
| 9 | * |
| 10 | * Redistribution and use in source and binary forms, with or without |
| 11 | * modification, are permitted provided that the following conditions |
| 12 | * are met: |
| 13 | * 1. Redistributions of source code must retain the above copyright |
| 14 | * notice, this list of conditions and the following disclaimer. |
| 15 | * 2. Redistributions in binary form must reproduce the above copyright |
| 16 | * notice, this list of conditions and the following disclaimer in the |
| 17 | * documentation and/or other materials provided with the distribution. |
| 18 | * 3. Neither the name of the University nor the names of its contributors |
| 19 | * may be used to endorse or promote products derived from this software |
| 20 | * without specific prior written permission. |
| 21 | * |
| 22 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
| 23 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 24 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| 25 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
| 26 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 27 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 28 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 29 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 30 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| 31 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| 32 | * SUCH DAMAGE. |
| 33 | */ |
| 34 | |
| 35 | #include <sys/cdefs.h> |
| 36 | #include <sys/sysctl.h> |
| 37 | #include <sys/types.h> |
| 38 | #include <sys/stat.h> |
| 39 | |
| 40 | #include <err.h> |
| 41 | #include <locale.h> |
| 42 | #include <pwd.h> |
| 43 | #include <stdio.h> |
| 44 | #include <stdlib.h> |
| 45 | #include <string.h> |
| 46 | #include <time.h> |
| 47 | #include <unistd.h> |
| 48 | #ifdef SUPPORT_UTMP |
| 49 | #include <utmp.h> |
| 50 | #endif |
| 51 | #ifdef SUPPORT_UTMPX |
| 52 | #include <utmpx.h> |
| 53 | #endif |
| 54 | |
| 55 | #include "utmpentry.h" |
| 56 | |
| 57 | static void print_boottime(void); |
| 58 | static void output_labels(void); |
| 59 | static void who_am_i(const char *, int); |
| 60 | static void usage(void); |
| 61 | static void process(const char *, int); |
| 62 | static void eprint(const struct utmpentry *); |
| 63 | static void print(const char *, const char *, time_t, const char *, pid_t pid, |
| 64 | uint16_t term, uint16_t xit, uint16_t sess, uint16_t type); |
| 65 | static void quick(const char *); |
| 66 | |
| 67 | static int show_term; /* show term state */ |
| 68 | static int show_idle; /* show idle time */ |
| 69 | static int show_details; /* show exit status etc. */ |
| 70 | static int bflag; /* Show date and time of last reboot */ |
| 71 | |
| 72 | struct ut_type_names { |
| 73 | int type; |
| 74 | const char *name; |
| 75 | } ut_type_names[] = { |
| 76 | #ifdef SUPPORT_UTMPX |
| 77 | { EMPTY, "empty" }, |
| 78 | { RUN_LVL, "run level" }, |
| 79 | { BOOT_TIME, "boot time" }, |
| 80 | { OLD_TIME, "old time" }, |
| 81 | { NEW_TIME, "new time" }, |
| 82 | { INIT_PROCESS, "init process" }, |
| 83 | { LOGIN_PROCESS, "login process" }, |
| 84 | { USER_PROCESS, "user process" }, |
| 85 | { DEAD_PROCESS, "dead process" }, |
| 86 | { ACCOUNTING, "accounting" }, |
| 87 | { SIGNATURE, "signature" }, |
| 88 | { DOWN_TIME, "down time" }, |
| 89 | #endif /* SUPPORT_UTMPX */ |
| 90 | { -1, "unknown" } |
| 91 | }; |
| 92 | |
| 93 | int |
| 94 | main(int argc, char *argv[]) |
| 95 | { |
| 96 | int c, only_current_term, show_labels, quick_mode, default_mode; |
| 97 | int et = 0; |
| 98 | |
| 99 | setlocale(LC_ALL, ""); |
| 100 | |
| 101 | only_current_term = show_term = show_idle = show_labels = 0; |
| 102 | quick_mode = default_mode = 0; |
| 103 | |
| 104 | while ((c = getopt(argc, argv, "abdHlmpqrsTtuv")) != -1) { |
| 105 | switch (c) { |
| 106 | case 'a': |
| 107 | et = -1; |
| 108 | show_idle = show_details = 1; |
| 109 | break; |
| 110 | case 'b': |
| 111 | #if 0 |
| 112 | et |= (1 << BOOT_TIME); |
| 113 | #endif |
| 114 | bflag = 1; |
| 115 | break; |
| 116 | case 'd': |
| 117 | et |= (1 << DEAD_PROCESS); |
| 118 | break; |
| 119 | case 'H': |
| 120 | show_labels = 1; |
| 121 | break; |
| 122 | case 'l': |
| 123 | et |= (1 << LOGIN_PROCESS); |
| 124 | break; |
| 125 | case 'm': |
| 126 | only_current_term = 1; |
| 127 | break; |
| 128 | case 'p': |
| 129 | et |= (1 << INIT_PROCESS); |
| 130 | break; |
| 131 | case 'q': |
| 132 | quick_mode = 1; |
| 133 | break; |
| 134 | case 'r': |
| 135 | et |= (1 << RUN_LVL); |
| 136 | break; |
| 137 | case 's': |
| 138 | default_mode = 1; |
| 139 | break; |
| 140 | case 'T': |
| 141 | show_term = 1; |
| 142 | break; |
| 143 | case 't': |
| 144 | et |= (1 << NEW_TIME); |
| 145 | break; |
| 146 | case 'u': |
| 147 | show_idle = 1; |
| 148 | break; |
| 149 | case 'v': |
| 150 | show_details = 1; |
| 151 | break; |
| 152 | default: |
| 153 | usage(); |
| 154 | /* NOTREACHED */ |
| 155 | } |
| 156 | } |
| 157 | argc -= optind; |
| 158 | argv += optind; |
| 159 | |
| 160 | if (et != 0) |
| 161 | etype = et; |
| 162 | |
| 163 | if (chdir("/dev")) { |
| 164 | err(EXIT_FAILURE, "cannot change directory to /dev"); |
| 165 | /* NOTREACHED */ |
| 166 | } |
| 167 | |
| 168 | if (default_mode) |
| 169 | only_current_term = show_term = show_idle = 0; |
| 170 | |
| 171 | if (!quick_mode && bflag) |
| 172 | print_boottime(); |
| 173 | |
| 174 | switch (argc) { |
| 175 | case 0: /* who */ |
| 176 | if (quick_mode) { |
| 177 | quick(NULL); |
| 178 | } else if (only_current_term) { |
| 179 | who_am_i(NULL, show_labels); |
| 180 | } else { |
| 181 | process(NULL, show_labels); |
| 182 | } |
| 183 | break; |
| 184 | case 1: /* who utmp_file */ |
| 185 | if (quick_mode) { |
| 186 | quick(*argv); |
| 187 | } else if (only_current_term) { |
| 188 | who_am_i(*argv, show_labels); |
| 189 | } else { |
| 190 | process(*argv, show_labels); |
| 191 | } |
| 192 | break; |
| 193 | case 2: /* who am i */ |
| 194 | who_am_i(NULL, show_labels); |
| 195 | break; |
| 196 | default: |
| 197 | usage(); |
| 198 | /* NOTREACHED */ |
| 199 | } |
| 200 | |
| 201 | return 0; |
| 202 | } |
| 203 | |
| 204 | static void |
| 205 | print_boottime(void) |
| 206 | { |
| 207 | struct timeval boottime; |
| 208 | size_t size; |
| 209 | |
| 210 | size = sizeof(boottime); |
| 211 | if (sysctlbyname("kern.boottime", &boottime, &size, NULL, 0) != -1 && |
| 212 | boottime.tv_sec != 0) { |
| 213 | printf("%s", ctime(&boottime.tv_sec)); |
| 214 | } |
| 215 | } |
| 216 | |
| 217 | |
| 218 | static char * |
| 219 | strrstr(const char *str, const char *pat) |
| 220 | { |
| 221 | const char *estr; |
| 222 | size_t len; |
| 223 | if (*pat == '\0') |
| 224 | return __DECONST(char *, str); |
| 225 | |
| 226 | len = strlen(pat); |
| 227 | |
| 228 | for (estr = str + strlen(str); str < estr; estr--) |
| 229 | if (strncmp(estr, pat, len) == 0) |
| 230 | return __DECONST(char *, estr); |
| 231 | return NULL; |
| 232 | } |
| 233 | |
| 234 | static void |
| 235 | who_am_i(const char *fname, int show_labels) |
| 236 | { |
| 237 | struct passwd *pw; |
| 238 | const char *p; |
| 239 | char *t; |
| 240 | time_t now; |
| 241 | struct utmpentry *ehead, *ep; |
| 242 | |
| 243 | /* search through the utmp and find an entry for this tty */ |
| 244 | if ((p = ttyname(STDIN_FILENO)) != NULL) { |
| 245 | |
| 246 | /* strip directory prefixes for ttys */ |
| 247 | if ((t = strrstr(p, "/pts/")) != NULL || |
| 248 | (t = strrchr(p, '/')) != NULL) |
| 249 | p = t + 1; |
| 250 | |
| 251 | (void)getutentries(fname, &ehead); |
| 252 | for (ep = ehead; ep; ep = ep->next) |
| 253 | if (strcmp(ep->line, p) == 0) { |
| 254 | if (show_labels) |
| 255 | output_labels(); |
| 256 | eprint(ep); |
| 257 | return; |
| 258 | } |
| 259 | } else |
| 260 | p = "tty??"; |
| 261 | |
| 262 | (void)time(&now); |
| 263 | pw = getpwuid(getuid()); |
| 264 | if (show_labels) |
| 265 | output_labels(); |
| 266 | print(pw ? pw->pw_name : "?", p, now, "", getpid(), 0, 0, 0, 0); |
| 267 | } |
| 268 | |
| 269 | static void |
| 270 | process(const char *fname, int show_labels) |
| 271 | { |
| 272 | struct utmpentry *ehead, *ep; |
| 273 | (void)getutentries(fname, &ehead); |
| 274 | if (show_labels) |
| 275 | output_labels(); |
| 276 | for (ep = ehead; ep != NULL; ep = ep->next) |
| 277 | eprint(ep); |
| 278 | } |
| 279 | |
| 280 | static void |
| 281 | eprint(const struct utmpentry *ep) |
| 282 | { |
| 283 | print(ep->name, ep->line, (time_t)ep->tv.tv_sec, ep->host, ep->pid, |
| 284 | ep->term, ep->exit, ep->sess, ep->type); |
| 285 | } |
| 286 | |
| 287 | static void |
| 288 | print(const char *name, const char *line, time_t t, const char *host, |
| 289 | pid_t pid, uint16_t term, uint16_t xit, uint16_t sess, uint16_t type) |
| 290 | { |
| 291 | struct stat sb; |
| 292 | char state; |
| 293 | static time_t now = 0; |
| 294 | time_t idle; |
| 295 | const char *types = NULL; |
| 296 | size_t i; |
| 297 | |
| 298 | state = '?'; |
| 299 | idle = 0; |
| 300 | |
| 301 | for (i = 0; ut_type_names[i].type >= 0; i++) { |
| 302 | types = ut_type_names[i].name; |
| 303 | if (ut_type_names[i].type == type) |
| 304 | break; |
| 305 | } |
| 306 | |
| 307 | if (show_term || show_idle) { |
| 308 | if (now == 0) |
| 309 | time(&now); |
| 310 | |
| 311 | if (stat(line, &sb) == 0) { |
| 312 | state = (sb.st_mode & 020) ? '+' : '-'; |
| 313 | idle = now - sb.st_atime; |
| 314 | } |
| 315 | |
| 316 | } |
| 317 | |
| 318 | (void)printf("%-*.*s ", maxname, maxname, name); |
| 319 | |
| 320 | if (show_term) |
| 321 | (void)printf("%c ", state); |
| 322 | |
| 323 | (void)printf("%-*.*s ", maxline, maxline, line); |
| 324 | (void)printf("%.12s ", ctime(&t) + 4); |
| 325 | |
| 326 | if (show_idle) { |
| 327 | if (idle < 60) |
| 328 | (void)printf(" . "); |
| 329 | else if (idle < (24 * 60 * 60)) |
| 330 | (void)printf("%02ld:%02ld ", |
| 331 | (long)(idle / (60 * 60)), |
| 332 | (long)(idle % (60 * 60)) / 60); |
| 333 | else |
| 334 | (void)printf(" old "); |
| 335 | |
| 336 | (void)printf("\t%6d", pid); |
| 337 | |
| 338 | if (show_details) { |
| 339 | if (type == RUN_LVL) |
| 340 | (void)printf("\tnew=%c old=%c", term, xit); |
| 341 | else |
| 342 | (void)printf("\tterm=%d exit=%d", term, xit); |
| 343 | (void)printf(" sess=%d", sess); |
| 344 | (void)printf(" type=%s ", types); |
| 345 | } |
| 346 | } |
| 347 | |
| 348 | if (*host) |
| 349 | (void)printf("\t(%.*s)", maxhost, host); |
| 350 | (void)putchar('\n'); |
| 351 | } |
| 352 | |
| 353 | static void |
| 354 | output_labels(void) |
| 355 | { |
| 356 | (void)printf("%-*.*s ", maxname, maxname, "USER"); |
| 357 | |
| 358 | if (show_term) |
| 359 | (void)printf("S "); |
| 360 | |
| 361 | (void)printf("%-*.*s ", maxline, maxline, "LINE"); |
| 362 | (void)printf("WHEN "); |
| 363 | |
| 364 | if (show_idle) { |
| 365 | (void)printf("IDLE "); |
| 366 | (void)printf("\t PID"); |
| 367 | |
| 368 | (void)printf("\tCOMMENT"); |
| 369 | } |
| 370 | |
| 371 | (void)putchar('\n'); |
| 372 | } |
| 373 | |
| 374 | static void |
| 375 | quick(const char *fname) |
| 376 | { |
| 377 | struct utmpentry *ehead, *ep; |
| 378 | int num = 0; |
| 379 | |
| 380 | (void)getutentries(fname, &ehead); |
| 381 | for (ep = ehead; ep != NULL; ep = ep->next) { |
| 382 | (void)printf("%-*s ", maxname, ep->name); |
| 383 | if ((++num % 8) == 0) |
| 384 | (void)putchar('\n'); |
| 385 | } |
| 386 | if (num % 8) |
| 387 | (void)putchar('\n'); |
| 388 | |
| 389 | (void)printf("# users = %d\n", num); |
| 390 | } |
| 391 | |
| 392 | static void |
| 393 | usage(void) |
| 394 | { |
| 395 | (void)fprintf(stderr, "Usage: %s [-abdHlmqrsTtuv] [file]\n\t%s am i\n", |
| 396 | getprogname(), getprogname()); |
| 397 | exit(EXIT_FAILURE); |
| 398 | } |