d346e50903
an -I flag is specified. The files in the compat dir could get away with double quotes here but I've converted all the source files to use angle brackets for consistency.
139 lines
2.8 KiB
C
139 lines
2.8 KiB
C
/*
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* Copyright (c) 2009 Todd C. Miller <Todd.Miller@courtesan.com>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include <config.h>
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#include <sys/param.h>
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#include <sys/types.h>
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#include <stdio.h>
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#ifdef STDC_HEADERS
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# include <stdlib.h>
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# include <stddef.h>
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#else
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# ifdef HAVE_STDLIB_H
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# include <stdlib.h>
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# endif
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#endif /* STDC_HEADERS */
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#ifdef HAVE_STRING_H
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# include <string.h>
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#else
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# ifdef HAVE_STRINGS_H
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# include <strings.h>
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# endif
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#endif /* HAVE_STRING_H */
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#include <limits.h>
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#ifdef HAVE_SYSCTL
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# include <sys/sysctl.h>
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#endif
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#include <compat.h>
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#include <missing.h>
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/*
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* Fill in a struct timeval with the time the system booted.
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* Returns 1 on success and 0 on failure.
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*/
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#if defined(__linux__)
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int
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get_boottime(struct timeval *tv)
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{
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char *line = NULL;
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size_t linesize = 0;
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ssize_t len;
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FILE * fp;
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/* read btime from /proc/stat */
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fp = fopen("/proc/stat", "r");
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if (fp != NULL) {
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while ((len = getline(&line, &linesize, fp)) != -1) {
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if (strncmp(line, "btime ", 6) == 0) {
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tv->tv_sec = atoi(line + 6);
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tv->tv_usec = 0;
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return 1;
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}
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}
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fclose(fp);
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free(line);
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}
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return 0;
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}
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#elif defined(HAVE_SYSCTL) && defined(KERN_BOOTTIME)
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int
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get_boottime(struct timeval *tv)
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{
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size_t size;
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int mib[2];
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mib[0] = CTL_KERN;
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mib[1] = KERN_BOOTTIME;
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size = sizeof(*tv);
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if (sysctl(mib, 2, tv, &size, NULL, 0) != -1)
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return 1;
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return 0;
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}
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#elif defined(HAVE_GETUTXID)
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#include <utmpx.h>
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int
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get_boottime(struct timeval *tv)
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{
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struct utmpx *ut, key;
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zero_bytes(&key, sizeof(key));
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key.ut_type = BOOT_TIME;
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if ((ut = getutxid(&key)) != NULL) {
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tv->tv_sec = ut->ut_tv.tv_sec;
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tv->tv_usec = ut->ut_tv.tv_usec;
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endutxent();
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}
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return ut != NULL;
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}
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#elif defined(HAVE_GETUTID)
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#include <utmp.h>
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int
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get_boottime(struct timeval *tv)
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{
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struct utmp *ut, key;
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zero_bytes(&key, sizeof(key));
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key.ut_type = BOOT_TIME;
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if ((ut = getutid(&key)) != NULL) {
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tv->tv_sec = ut->ut_time;
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tv->tv_usec = 0;
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endutent();
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}
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return ut != NULL;
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}
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#else
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time_t
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get_boottime()
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{
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return 0;
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}
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#endif
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