/* GNU's who. This is the who utility
Copyright (C) 1992-2018 Free Software Foundation, Inc.
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>. */ The GNUv3 license
/* Written by jla; revised by djm; revised again by mstone */
/* Output format:
name [state] line time [activity] [pid] [comment] [exit]
state: -T
name, line, time: not -q
idle: -u
*/
#include <config.h> Provides system specific information
#include <getopt.h> ...!includes auto-comment...
#include <stdio.h> Provides standard I/O capability
#include <assert.h> ...!includes auto-comment...
#include <sys/types.h> Provides system data types
#include "system.h" ...!includes auto-comment...
#include "c-ctype.h" ...!includes auto-comment...
#include "canon-host.h" ...!includes auto-comment...
#include "readutmp.h" ...!includes auto-comment...
#include "die.h" ...!includes auto-comment...
#include "error.h" ...!includes auto-comment...
#include "hard-locale.h" ...!includes auto-comment...
#include "quote.h" ...!includes auto-comment...
#ifdef TTY_GROUP_NAME Line 42
# include <grp.h> ...!includes auto-comment...
#endif Line 44
/* The official name of this program (e.g., no 'g' prefix). */
#define PROGRAM_NAME "who" Line 47
#define AUTHORS \ Line 49
proper_name ("Joseph Arceneaux"), \ Line 50
proper_name ("David MacKenzie"), \ Line 51
proper_name ("Michael Stone") Line 52
#ifdef RUN_LVL Line 54
# define UT_TYPE_RUN_LVL(U) UT_TYPE_EQ (U, RUN_LVL) Line 55
#else Line 56
# define UT_TYPE_RUN_LVL(U) false Line 57
#endif Line 58
#ifdef INIT_PROCESS Line 60
# define UT_TYPE_INIT_PROCESS(U) UT_TYPE_EQ (U, INIT_PROCESS) Line 61
#else Line 62
# define UT_TYPE_INIT_PROCESS(U) false Line 63
#endif Line 64
#ifdef LOGIN_PROCESS Line 66
# define UT_TYPE_LOGIN_PROCESS(U) UT_TYPE_EQ (U, LOGIN_PROCESS) Line 67
#else Line 68
# define UT_TYPE_LOGIN_PROCESS(U) false Line 69
#endif Line 70
#ifdef DEAD_PROCESS Line 72
# define UT_TYPE_DEAD_PROCESS(U) UT_TYPE_EQ (U, DEAD_PROCESS) Line 73
#else Line 74
# define UT_TYPE_DEAD_PROCESS(U) false Line 75
#endif Line 76
#ifdef NEW_TIME Line 78
# define UT_TYPE_NEW_TIME(U) UT_TYPE_EQ (U, NEW_TIME) Line 79
#else Line 80
# define UT_TYPE_NEW_TIME(U) false Line 81
#endif Line 82
#define IDLESTR_LEN 6 Line 84
#if HAVE_STRUCT_XTMP_UT_PID Line 86
# define PIDSTR_DECL_AND_INIT(Var, Utmp_ent) \ Line 87
char Var[INT_STRLEN_BOUND (Utmp_ent->ut_pid) + 1]; \ Line 88
sprintf (Var, "%ld", (long int) (Utmp_ent->ut_pid)) Line 89
#else Line 90
# define PIDSTR_DECL_AND_INIT(Var, Utmp_ent) \ Line 91
const char *Var = "" Line 92
#endif Line 93
#if HAVE_STRUCT_XTMP_UT_ID Line 95
# define UT_ID(U) ((U)->ut_id) Line 96
#else Line 97
# define UT_ID(U) "??" Line 98
#endif Line 99
/* If true, attempt to canonicalize hostnames via a DNS lookup. */
static bool do_lookup; Line 102
/* If true, display only a list of usernames and count of
the users logged on.
Ignored for 'who am i'. */
static bool short_list; Line 107
/* If true, display only name, line, and time fields. */
static bool short_output; Line 110
/* If true, display the hours:minutes since each user has touched
the keyboard, or "." if within the last minute, or "old" if
not within the last day. */
static bool include_idle; Line 115
/* If true, display a line at the top describing each field. */
static bool include_heading; Line 118
/* If true, display a '+' for each user if mesg y, a '-' if mesg n,
or a '?' if their tty cannot be statted. */
static bool include_mesg; Line 122
/* If true, display process termination & exit status. */
static bool include_exit; Line 125
/* If true, display the last boot time. */
static bool need_boottime; Line 128
/* If true, display dead processes. */
static bool need_deadprocs; Line 131
/* If true, display processes waiting for user login. */
static bool need_login; Line 134
/* If true, display processes started by init. */
static bool need_initspawn; Line 137
/* If true, display the last clock change. */
static bool need_clockchange; Line 140
/* If true, display the current runlevel. */
static bool need_runlevel; Line 143
/* If true, display user processes. */
static bool need_users; Line 146
/* If true, display info only for the controlling tty. */
static bool my_line_only; Line 149
/* The strftime format to use for login times, and its expected
output width. */
static char const *time_format; Line 153
static int time_format_width; Line 154
/* for long options with no corresponding short option, use enum */
enum Line 157
{
LOOKUP_OPTION = CHAR_MAX + 1 Line 159
}; Block 1
static struct option const longopts[] = Line 162
{
{"all", no_argument, NULL, 'a'}, Line 164
{"boot", no_argument, NULL, 'b'}, Line 165
{"count", no_argument, NULL, 'q'}, Line 166
{"dead", no_argument, NULL, 'd'}, Line 167
{"heading", no_argument, NULL, 'H'}, Line 168
{"login", no_argument, NULL, 'l'}, Line 169
{"lookup", no_argument, NULL, LOOKUP_OPTION}, Line 170
{"message", no_argument, NULL, 'T'}, Line 171
{"mesg", no_argument, NULL, 'T'}, Line 172
{"process", no_argument, NULL, 'p'}, Line 173
{"runlevel", no_argument, NULL, 'r'}, Line 174
{"short", no_argument, NULL, 's'}, Line 175
{"time", no_argument, NULL, 't'}, Line 176
{"users", no_argument, NULL, 'u'}, Line 177
{"writable", no_argument, NULL, 'T'}, Line 178
{GETOPT_HELP_OPTION_DECL}, Line 179
{GETOPT_VERSION_OPTION_DECL}, Line 180
{NULL, 0, NULL, 0} Line 181
}; Block 2
/* Return a string representing the time between WHEN and now.
BOOTTIME is the time of last reboot.
FIXME: locale? */
static const char * Line 187
idle_string (time_t when, time_t boottime) Line 188
{
static time_t now = TYPE_MINIMUM (time_t); Line 190
if (now == TYPE_MINIMUM (time_t)) Line 192
time (&now); Line 193
if (boottime < when && now - 24 * 60 * 60 < when && when <= now) Line 195
{
int seconds_idle = now - when; Line 197
if (seconds_idle < 60) Line 198
return " . "; Line 199
else Line 200
{
static char idle_hhmm[IDLESTR_LEN]; Line 202
/* FIXME-in-2018: see if this assert is still required in order
to suppress gcc's unwarranted -Wformat-length= warning. */
assert (seconds_idle / (60 * 60) < 24); Line 205
sprintf (idle_hhmm, "%02d:%02d", Line 206
seconds_idle / (60 * 60), Line 207
(seconds_idle % (60 * 60)) / 60); Line 208
return idle_hhmm; Line 209
}
}
return _(" old "); Line 213
} Block 3
/* Return a time string. */
static const char * Line 217
time_string (const STRUCT_UTMP *utmp_ent) Line 218
{
static char buf[INT_STRLEN_BOUND (intmax_t) + sizeof "-%m-%d %H:%M"]; Line 220
/* Don't take the address of UT_TIME_MEMBER directly.
Ulrich Drepper wrote:
"... GNU libc (and perhaps other libcs as well) have extended
utmp file formats which do not use a simple time_t ut_time field.
In glibc, ut_time is a macro which selects for backward compatibility
the tv_sec member of a struct timeval value." */
time_t t = UT_TIME_MEMBER (utmp_ent); Line 228
struct tm *tmp = localtime (&t); Line 229
if (tmp) Line 231
{
strftime (buf, sizeof buf, time_format, tmp); Line 233
return buf; Line 234
}
else Line 236
return timetostr (t, buf); Line 237
} Block 4
/* Print formatted output line. Uses mostly arbitrary field sizes, probably
will need tweaking if any of the localization stuff is done, or for 64 bit
pids, etc. */
static void Line 243
print_line (int userlen, const char *user, const char state, Line 244
int linelen, const char *line, Line 245
const char *time_str, const char *idle, const char *pid, Line 246
const char *comment, const char *exitstr) Line 247
{
static char mesg[3] = { ' ', 'x', '\0' }; Line 249
char *buf; Line 250
char x_idle[1 + IDLESTR_LEN + 1]; Line 251
char x_pid[1 + INT_STRLEN_BOUND (pid_t) + 1]; Line 252
char *x_exitstr; Line 253
int err; Line 254
mesg[1] = state; Line 256
if (include_idle && !short_output && strlen (idle) < sizeof x_idle - 1) Line 258
sprintf (x_idle, " %-6s", idle); Line 259
else Line 260
*x_idle = '\0'; Line 261
if (!short_output && strlen (pid) < sizeof x_pid - 1) Line 263
sprintf (x_pid, " %10s", pid); Line 264
else Line 265
*x_pid = '\0'; Line 266
x_exitstr = xmalloc (include_exit ? 1 + MAX (12, strlen (exitstr)) + 1 : 1); Line 268
if (include_exit) Line 269
sprintf (x_exitstr, " %-12s", exitstr); Line 270
else Line 271
*x_exitstr = '\0'; Line 272
err = asprintf (&buf, Line 274
"%-8.*s" Line 275
"%s" Line 276
" %-12.*s" Line 277
" %-*s" Line 278
"%s" Line 279
"%s" Line 280
" %-8s" Line 281
"%s" Line 282
,
userlen, user ? user : " .", Line 284
include_mesg ? mesg : "", Line 285
linelen, line, Line 286
time_format_width, Line 287
time_str, Line 288
x_idle, Line 289
x_pid, Line 290
/* FIXME: it's not really clear whether the following
field should be in the short_output. A strict reading
of SUSv2 would suggest not, but I haven't seen any
implementations that actually work that way... */
comment, Line 295
x_exitstr Line 296
);
if (err == -1) Line 298
xalloc_die (); ...!common auto-comment...
{
/* Remove any trailing spaces. */
char *p = buf + strlen (buf); Line 303
while (*--p == ' ') Line 304
/* empty */;
*(p + 1) = '\0'; Line 306
}
puts (buf); Line 309
free (buf); Line 310
free (x_exitstr); Line 311
} Block 5
/* Return true if a terminal device given as PSTAT allows other users
to send messages to; false otherwise */
static bool Line 316
is_tty_writable (struct stat const *pstat) Line 317
{
#ifdef TTY_GROUP_NAME Line 319
/* Ensure the group of the TTY device matches TTY_GROUP_NAME, more info at
https://bugzilla.redhat.com/454261 */
struct group *ttygr = getgrnam (TTY_GROUP_NAME); Line 322
if (!ttygr || (pstat->st_gid != ttygr->gr_gid)) Line 323
return false; Line 324
#endif Line 325
return pstat->st_mode & S_IWGRP; Line 327
} Block 6
/* Send properly parsed USER_PROCESS info to print_line. The most
recent boot time is BOOTTIME. */
static void Line 332
print_user (const STRUCT_UTMP *utmp_ent, time_t boottime) Line 333
{
struct stat stats; Line 335
time_t last_change; Line 336
char mesg; Line 337
char idlestr[IDLESTR_LEN + 1]; Line 338
static char *hoststr; Line 339
#if HAVE_UT_HOST Line 340
static size_t hostlen; Line 341
#endif Line 342
#define DEV_DIR_WITH_TRAILING_SLASH "/dev/" Line 344
#define DEV_DIR_LEN (sizeof (DEV_DIR_WITH_TRAILING_SLASH) - 1) Line 345
char line[sizeof (utmp_ent->ut_line) + DEV_DIR_LEN + 1]; Line 347
char *p = line; Line 348
PIDSTR_DECL_AND_INIT (pidstr, utmp_ent); Line 349
/* Copy ut_line into LINE, prepending '/dev/' if ut_line is not
already an absolute file name. Some systems may put the full,
absolute file name in ut_line. */
if ( ! IS_ABSOLUTE_FILE_NAME (utmp_ent->ut_line)) Line 354
p = stpcpy (p, DEV_DIR_WITH_TRAILING_SLASH); Line 355
stzncpy (p, utmp_ent->ut_line, sizeof (utmp_ent->ut_line)); Line 356
if (stat (line, &stats) == 0) Line 358...!syscalls auto-comment...
{
mesg = is_tty_writable (&stats) ? '+' : '-'; Line 360
last_change = stats.st_atime; Line 361
}
else Line 363
{
mesg = '?'; Line 365
last_change = 0; Line 366
}
if (last_change) Line 369
sprintf (idlestr, "%.*s", IDLESTR_LEN, idle_string (last_change, boottime));Line 370
else Line 371
sprintf (idlestr, " ?"); Line 372
#if HAVE_UT_HOST Line 374
if (utmp_ent->ut_host[0]) Line 375
{
char ut_host[sizeof (utmp_ent->ut_host) + 1]; Line 377
char *host = NULL; Line 378
char *display = NULL; Line 379
/* Copy the host name into UT_HOST, and ensure it's nul terminated. */
stzncpy (ut_host, utmp_ent->ut_host, sizeof (utmp_ent->ut_host)); Line 382
/* Look for an X display. */
display = strchr (ut_host, ':'); Line 385
if (display) Line 386
*display++ = '\0'; Line 387
if (*ut_host && do_lookup) Line 389
{
/* See if we can canonicalize it. */
host = canon_host (ut_host); Line 392
}
if (! host) Line 395
host = ut_host; Line 396
if (display) Line 398
{
if (hostlen < strlen (host) + strlen (display) + 4) Line 400
{
hostlen = strlen (host) + strlen (display) + 4; Line 402
free (hoststr); Line 403
hoststr = xmalloc (hostlen); Line 404
}
sprintf (hoststr, "(%s:%s)", host, display); Line 406
}
else Line 408
{
if (hostlen < strlen (host) + 3) Line 410
{
hostlen = strlen (host) + 3; Line 412
free (hoststr); Line 413
hoststr = xmalloc (hostlen); Line 414
}
sprintf (hoststr, "(%s)", host); Line 416
}
if (host != ut_host) Line 419
free (host); Line 420
}
else Line 422
{
if (hostlen < 1) Line 424
{
hostlen = 1; Line 426
free (hoststr); Line 427
hoststr = xmalloc (hostlen); Line 428
}
*hoststr = '\0'; Line 430
}
#endif Line 432
print_line (sizeof UT_USER (utmp_ent), UT_USER (utmp_ent), mesg, Line 434
sizeof utmp_ent->ut_line, utmp_ent->ut_line, Line 435
time_string (utmp_ent), idlestr, pidstr, Line 436
hoststr ? hoststr : "", ""); Line 437
} Block 7
static void Line 440
print_boottime (const STRUCT_UTMP *utmp_ent) Line 441
{
print_line (-1, "", ' ', -1, _("system boot"), Line 443
time_string (utmp_ent), "", "", "", ""); Line 444
} Block 8
static char * Line 447
make_id_equals_comment (STRUCT_UTMP const *utmp_ent) Line 448
{
size_t utmpsize = sizeof UT_ID (utmp_ent); Line 450
char *comment = xmalloc (strlen (_("id=")) + utmpsize + 1); Line 451
strcpy (comment, _("id=")); Line 453
strncat (comment, UT_ID (utmp_ent), utmpsize); Line 454
return comment; Line 455
} Block 9
static void Line 458
print_deadprocs (const STRUCT_UTMP *utmp_ent) Line 459
{
static char *exitstr; Line 461
char *comment = make_id_equals_comment (utmp_ent); Line 462
PIDSTR_DECL_AND_INIT (pidstr, utmp_ent); Line 463
if (!exitstr) Line 465
exitstr = xmalloc (strlen (_("term=")) Line 466
+ INT_STRLEN_BOUND (UT_EXIT_E_TERMINATION (utmp_ent)) + 1Line 467
+ strlen (_("exit=")) Line 468
+ INT_STRLEN_BOUND (UT_EXIT_E_EXIT (utmp_ent)) Line 469
+ 1); Line 470
sprintf (exitstr, "%s%d %s%d", _("term="), UT_EXIT_E_TERMINATION (utmp_ent), Line 471
_("exit="), UT_EXIT_E_EXIT (utmp_ent)); Line 472
/* FIXME: add idle time? */
print_line (-1, "", ' ', sizeof utmp_ent->ut_line, utmp_ent->ut_line, Line 476
time_string (utmp_ent), "", pidstr, comment, exitstr); Line 477
free (comment); Line 478
} Block 10
static void Line 481
print_login (const STRUCT_UTMP *utmp_ent) Line 482
{
char *comment = make_id_equals_comment (utmp_ent); Line 484
PIDSTR_DECL_AND_INIT (pidstr, utmp_ent); Line 485
/* FIXME: add idle time? */
print_line (-1, _("LOGIN"), ' ', sizeof utmp_ent->ut_line, utmp_ent->ut_line, Line 489
time_string (utmp_ent), "", pidstr, comment, ""); Line 490
free (comment); Line 491
} Block 11
static void Line 494
print_initspawn (const STRUCT_UTMP *utmp_ent) Line 495
{
char *comment = make_id_equals_comment (utmp_ent); Line 497
PIDSTR_DECL_AND_INIT (pidstr, utmp_ent); Line 498
print_line (-1, "", ' ', sizeof utmp_ent->ut_line, utmp_ent->ut_line, Line 500
time_string (utmp_ent), "", pidstr, comment, ""); Line 501
free (comment); Line 502
} Block 12
static void Line 505
print_clockchange (const STRUCT_UTMP *utmp_ent) Line 506
{
/* FIXME: handle NEW_TIME & OLD_TIME both */
print_line (-1, "", ' ', -1, _("clock change"), Line 509
time_string (utmp_ent), "", "", "", ""); Line 510
}
static void Line 513
print_runlevel (const STRUCT_UTMP *utmp_ent) Line 514
{
static char *runlevline, *comment; Line 516
unsigned char last = UT_PID (utmp_ent) / 256; Line 517
unsigned char curr = UT_PID (utmp_ent) % 256; Line 518
if (!runlevline) Line 520
runlevline = xmalloc (strlen (_("run-level")) + 3); Line 521
sprintf (runlevline, "%s %c", _("run-level"), curr); Line 522
if (!comment) Line 524
comment = xmalloc (strlen (_("last=")) + 2); Line 525
sprintf (comment, "%s%c", _("last="), (last == 'N') ? 'S' : last); Line 526
print_line (-1, "", ' ', -1, runlevline, time_string (utmp_ent), Line 528
"", "", c_isprint (last) ? comment : "", ""); Line 529
return; Line 531
} Block 14
/* Print the username of each valid entry and the number of valid entries
in UTMP_BUF, which should have N elements. */
static void Line 536
list_entries_who (size_t n, const STRUCT_UTMP *utmp_buf) Line 537
{
unsigned long int entries = 0; Line 539
char const *separator = ""; Line 540
while (n--) Line 542
{
if (IS_USER_PROCESS (utmp_buf)) Line 544
{
char *trimmed_name; Line 546
trimmed_name = extract_trimmed_name (utmp_buf); Line 548
printf ("%s%s", separator, trimmed_name); Line 550
free (trimmed_name); Line 551
separator = " "; Line 552
entries++; Line 553
}
utmp_buf++; Line 555
}
printf (_("\n# users=%lu\n"), entries); Line 557
} Block 15
static void Line 560
print_heading (void) Line 561
{
print_line (-1, _("NAME"), ' ', -1, _("LINE"), _("TIME"), _("IDLE"), Line 563
_("PID"), _("COMMENT"), _("EXIT")); Line 564
} Block 16
/* Display UTMP_BUF, which should have N entries. */
static void Line 568
scan_entries (size_t n, const STRUCT_UTMP *utmp_buf) Line 569
{
char *ttyname_b IF_LINT ( = NULL); Line 571
time_t boottime = TYPE_MINIMUM (time_t); Line 572
if (include_heading) Line 574
print_heading (); Line 575
if (my_line_only) Line 577
{
ttyname_b = ttyname (STDIN_FILENO); Line 579
if (!ttyname_b) Line 580
return; Line 581
if (STRNCMP_LIT (ttyname_b, DEV_DIR_WITH_TRAILING_SLASH) == 0) Line 582
ttyname_b += DEV_DIR_LEN; /* Discard /dev/ prefix. */ Line 583
}
while (n--) Line 586
{
if (!my_line_only Line 588
|| STREQ_LEN (ttyname_b, utmp_buf->ut_line, Line 589
sizeof (utmp_buf->ut_line))) Line 590
{
if (need_users && IS_USER_PROCESS (utmp_buf)) Line 592
print_user (utmp_buf, boottime); Line 593
else if (need_runlevel && UT_TYPE_RUN_LVL (utmp_buf)) Line 594
print_runlevel (utmp_buf); Line 595
else if (need_boottime && UT_TYPE_BOOT_TIME (utmp_buf)) Line 596
print_boottime (utmp_buf); Line 597
/* I've never seen one of these, so I don't know what it should
look like :^)
FIXME: handle OLD_TIME also, perhaps show the delta? */
else if (need_clockchange && UT_TYPE_NEW_TIME (utmp_buf)) Line 601
print_clockchange (utmp_buf); Line 602
else if (need_initspawn && UT_TYPE_INIT_PROCESS (utmp_buf)) Line 603
print_initspawn (utmp_buf); Line 604
else if (need_login && UT_TYPE_LOGIN_PROCESS (utmp_buf)) Line 605
print_login (utmp_buf); Line 606
else if (need_deadprocs && UT_TYPE_DEAD_PROCESS (utmp_buf)) Line 607
print_deadprocs (utmp_buf); Line 608
}
if (UT_TYPE_BOOT_TIME (utmp_buf)) Line 611
boottime = UT_TIME_MEMBER (utmp_buf); Line 612
utmp_buf++; Line 614
}
} Block 17
/* Display a list of who is on the system, according to utmp file FILENAME.
Use read_utmp OPTIONS to read the file. */
static void Line 620
who (const char *filename, int options) Line 621
{
size_t n_users; Line 623
STRUCT_UTMP *utmp_buf; Line 624
if (read_utmp (filename, &n_users, &utmp_buf, options) != 0) Line 626
die (EXIT_FAILURE, errno, "%s", quotef (filename)); Line 627
if (short_list) Line 629
list_entries_who (n_users, utmp_buf); Line 630
else Line 631
scan_entries (n_users, utmp_buf); Line 632
free (utmp_buf); Line 634
} Block 18
void Line 637
usage (int status) Line 638
{
if (status != EXIT_SUCCESS) Line 640
emit_try_help (); ...!common auto-comment...
else Line 642
{
printf (_("Usage: %s [OPTION]... [ FILE | ARG1 ARG2 ]\n"), program_name); Line 644
fputs (_("\ Line 645
Print information about users who are currently logged in.\n\ Line 646
"), stdout); Line 647
fputs (_("\ Line 648
\n\
-a, --all same as -b -d --login -p -r -t -T -u\n\ Line 650
-b, --boot time of last system boot\n\ Line 651
-d, --dead print dead processes\n\ Line 652
-H, --heading print line of column headings\n\ Line 653
"), stdout); Line 654
fputs (_("\ Line 655
-l, --login print system login processes\n\ Line 656
"), stdout); Line 657
fputs (_("\ Line 658
--lookup attempt to canonicalize hostnames via DNS\n\ Line 659
-m only hostname and user associated with stdin\n\ Line 660
-p, --process print active processes spawned by init\n\ Line 661
"), stdout); Line 662
fputs (_("\ Line 663
-q, --count all login names and number of users logged on\n\ Line 664
-r, --runlevel print current runlevel\n\ Line 665
-s, --short print only name, line, and time (default)\n\ Line 666
-t, --time print last system clock change\n\ Line 667
"), stdout); Line 668
fputs (_("\ Line 669
-T, -w, --mesg add user's message status as +, - or ?\n\ Line 670
-u, --users list users logged in\n\ Line 671
--message same as -T\n\ Line 672
--writable same as -T\n\ Line 673
"), stdout); Line 674
fputs (HELP_OPTION_DESCRIPTION, stdout); Line 675
fputs (VERSION_OPTION_DESCRIPTION, stdout); Line 676
printf (_("\ Line 677
\n\
If FILE is not specified, use %s. %s as FILE is common.\n\ Line 679
If ARG1 ARG2 given, -m presumed: 'am i' or 'mom likes' are usual.\n\ Line 680
"), UTMP_FILE, WTMP_FILE); Line 681
emit_ancillary_info (PROGRAM_NAME); Line 682
}
exit (status); Line 684
} Block 19
int
main (int argc, char **argv) Line 688
{
int optc; Line 690
bool assumptions = true; Line 691
initialize_main (&argc, &argv); VMS-specific entry point handling wildcard expansion
set_program_name (argv[0]); Retains program name and discards path
setlocale (LC_ALL, ""); Sets up internationalization (i18n)
bindtextdomain (PACKAGE, LOCALEDIR); Assigns i18n directorySets text domain for _() [gettext()] function
textdomain (PACKAGE); Sets text domain for _() [gettext()] function
atexit (close_stdout); Close stdout on exit (see gnulib)
while ((optc = getopt_long (argc, argv, "abdlmpqrstuwHT", longopts, NULL)) Line 701
!= -1) Line 702
{
switch (optc) Line 704
{
case 'a': Line 706
need_boottime = true; Line 707
need_deadprocs = true; Line 708
need_login = true; Line 709
need_initspawn = true; Line 710
need_runlevel = true; Line 711
need_clockchange = true; Line 712
need_users = true; Line 713
include_mesg = true; Line 714
include_idle = true; Line 715
include_exit = true; Line 716
assumptions = false; Line 717
break; Line 718
case 'b': Line 720
need_boottime = true; Line 721
assumptions = false; Line 722
break; Line 723
case 'd': Line 725
need_deadprocs = true; Line 726
include_idle = true; Line 727
include_exit = true; Line 728
assumptions = false; Line 729
break; Line 730
case 'H': Line 732
include_heading = true; Line 733
break; Line 734
case 'l': Line 736
need_login = true; Line 737
include_idle = true; Line 738
assumptions = false; Line 739
break; Line 740
case 'm': Line 742
my_line_only = true; Line 743
break; Line 744
case 'p': Line 746
need_initspawn = true; Line 747
assumptions = false; Line 748
break; Line 749
case 'q': Line 751
short_list = true; Line 752
break; Line 753
case 'r': Line 755
need_runlevel = true; Line 756
include_idle = true; Line 757
assumptions = false; Line 758
break; Line 759
case 's': Line 761
short_output = true; Line 762
break; Line 763
case 't': Line 765
need_clockchange = true; Line 766
assumptions = false; Line 767
break; Line 768
case 'T': Line 770
case 'w': Line 771
include_mesg = true; Line 772
break; Line 773
case 'u': Line 775
need_users = true; Line 776
include_idle = true; Line 777
assumptions = false; Line 778
break; Line 779
case LOOKUP_OPTION: Line 781
do_lookup = true; Line 782
break; Line 783
case_GETOPT_HELP_CHAR; Line 785
case_GETOPT_VERSION_CHAR (PROGRAM_NAME, AUTHORS); Line 787
default: Line 789
usage (EXIT_FAILURE); Line 790
}
}
if (assumptions) Line 794
{
need_users = true; Line 796
short_output = true; Line 797
}
if (include_exit) Line 800
{
short_output = false; Line 802
}
if (hard_locale (LC_TIME)) Line 805
{
time_format = "%Y-%m-%d %H:%M"; Line 807
time_format_width = 4 + 1 + 2 + 1 + 2 + 1 + 2 + 1 + 2; Line 808
}
else Line 810
{
time_format = "%b %e %H:%M"; Line 812
time_format_width = 3 + 1 + 2 + 1 + 2 + 1 + 2; Line 813
}
switch (argc - optind) Line 816
{
case 2: /* who <blurf> <glop> */ Line 818
my_line_only = true; Line 819
FALLTHROUGH; Line 820
case -1: Line 821
case 0: /* who */ Line 822
who (UTMP_FILE, READ_UTMP_CHECK_PIDS); Line 823
break; Line 824
case 1: /* who <utmp file> */ Line 826
who (argv[optind], 0); Line 827
break; Line 828
default: /* lose */ Line 830
error (0, 0, _("extra operand %s"), quote (argv[optind + 2])); Line 831
usage (EXIT_FAILURE); Line 832
}
return EXIT_SUCCESS; Line 835
} Block 20