136 lines
2.7 KiB
C
136 lines
2.7 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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#if defined(__linux__)
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time_t
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get_boottime()
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{
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time_t boottime = 0;
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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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boottime = atoi(line + 6);
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break;
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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(boottime);
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}
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#elif defined(HAVE_SYSCTL) && defined(KERN_BOOTTIME)
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time_t
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get_boottime()
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{
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struct timeval tv;
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time_t boottime = 0;
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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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boottime = tv.tv_sec;
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return(boottime);
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}
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#elif defined(HAVE_GETUTXID)
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#include <utmpx.h>
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time_t
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get_boottime()
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{
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time_t boottime = 0;
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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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boottime = ut->ut_tv.tv_sec;
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endutxent();
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}
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return(boottime);
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}
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#elif defined(HAVE_GETUTID)
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#include <utmp.h>
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time_t
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get_boottime()
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{
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time_t boottime = 0;
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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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boottime = ut->ut_time;
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endutent();
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}
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return(boottime);
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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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