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/* Test of readutmp module.
Copyright (C) 2023-2025 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/>. */
/* Written by Bruno Haible <bruno@clisp.org>, 2023. */
#include <config.h>
#include "readutmp.h"
#include <stddef.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include "idx.h"
#include "xalloc.h"
#define ELEMENT STRUCT_UTMP
#define COMPARE(entry1, entry2) \
_GL_CMP (UT_TIME_MEMBER (entry1), UT_TIME_MEMBER (entry2))
#define STATIC static
#include "array-mergesort.h"
#include "macros.h"
int
main (int argc, char *argv[])
{
STRUCT_UTMP *entries;
idx_t num_entries;
if (read_utmp (UTMP_FILE, &num_entries, &entries, 0) < 0)
{
#if READ_UTMP_SUPPORTED
fprintf (stderr, "Skipping test: cannot open %s\n", UTMP_FILE);
#else
fprintf (stderr, "Skipping test: neither <utmpx.h> nor <utmp.h> is available\n");
#endif
return 77;
}
printf ("Here are the read_utmp results.\n");
printf ("Flags: B = Boot, U = User Process\n");
printf ("\n");
printf (" Termi‐ Flags\n");
printf (" Time (GMT) User Device PID nation Exit B U Host\n");
printf ("------------------- ------------------ ----------- ---------- ------ ---- - - ----\n");
/* What do the results look like?
* On Alpine Linux, Cygwin, Android, the output is empty.
* The entries are usually not sorted according to the Time column, so
we do it here.
* In the User column, special values exist:
- The empty string denotes a system event.
Seen on glibc, macOS, FreeBSD, NetBSD, OpenBSD, AIX
- The value "reboot" denotes a reboot.
Seen on glibc
- The value "runlevel" denotes a runlevel change.
Seen on glibc
- The value "LOGIN" denotes the start of a virtual console.
Seen on glibc, Solaris
- The value "/usr/libexec/getty" denotes the start of a virtual console.
Seen on NetBSD
* In the Device column:
- The empty string denotes a system event.
Seen on macOS, FreeBSD, AIX
- The value "~" denotes an event with no associated device.
Seen on glibc
- The values "system boot", "system down", "run-level N" are
seen on NetBSD, AIX, Solaris.
- The values "old time", "new time" are
seen on Solaris.
- Common devices are:
- On glibc: "ttyN" (console) and "pts/N" (pseudo-terminals).
- On macOS: "ttysNNN" (pseudo-terminals).
- On FreeBSD: "ttyvN" (console).
- On NetBSD: "ttyEN", "constty" (console).
- On OpenBSD: "ttyCN", "console" (console) and "ttypN" (pseudo-terminals).
- on AIX: "vtyN" (console) and "pts/N" (pseudo-terminals).
- On Solaris: "vt/N", "console" (console) and "pts/N" (pseudo-terminals).
* The PID column is zero on platforms without a 'ut_pid' field: OpenBSD.
*/
if (num_entries > 0)
{
/* Sort the entries according to increasing UT_TIME_MEMBER (entry).
Use a stable sort algorithm. */
merge_sort_inplace (entries, num_entries,
XNMALLOC (num_entries, STRUCT_UTMP));
idx_t boot_time_count = 0;
idx_t i;
for (i = 0; i < num_entries; i++)
{
const STRUCT_UTMP *entry = &entries[i];
char *user = extract_trimmed_name (entry);
const char *device = entry->ut_line;
long pid = UT_PID (entry);
int termination = UT_EXIT_E_TERMINATION (entry);
int exit = UT_EXIT_E_EXIT (entry);
const char *host = entry->ut_host;
time_t tim = UT_TIME_MEMBER (entry);
struct tm *gmt = gmtime (&tim);
char timbuf[100];
if (gmt == NULL
|| strftime (timbuf, sizeof (timbuf), "%Y-%m-%d %H:%M:%S", gmt)
== 0)
strcpy (timbuf, "---");
printf ("%-19s %-18s %-11s %10ld %4d %3d %c %c %s\n",
timbuf,
user,
device,
pid,
termination,
exit,
UT_TYPE_BOOT_TIME (entry) ? 'X' : ' ',
UT_TYPE_USER_PROCESS (entry) ? 'X' : ' ',
host);
if (UT_TYPE_BOOT_TIME (entry))
boot_time_count++;
}
fflush (stdout);
/* If the first time is more than 5 years in the past or the last time
is more than a week in the future, the time_t members are wrong. */
time_t first = UT_TIME_MEMBER (&entries[0]);
time_t last = UT_TIME_MEMBER (&entries[num_entries - 1]);
time_t now = time (NULL);
ASSERT (first >= now - 157680000);
ASSERT (last <= now + 604800);
/* read_utmp should not produce multiple BOOT_TIME entries. */
ASSERT (boot_time_count <= 1);
/* read_utmp should fake a BOOT_TIME entry if needed.
Platform specific hacks go into lib/boot-time-aux.h. */
ASSERT (boot_time_count >= 1);
}
free (entries);
return test_exit_status;
}
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