uptime.c (1454B)
1 /* See LICENSE file for copyright and license details. */ 2 #include <sys/sysinfo.h> 3 4 #include <stdio.h> 5 #include <stdlib.h> 6 #include <string.h> 7 #include <time.h> 8 #include <utmpx.h> 9 10 #include "config.h" 11 #include "util.h" 12 13 static void 14 usage(void) 15 { 16 eprintf("usage: %s\n", argv0); 17 } 18 19 int 20 main(int argc, char *argv[]) 21 { 22 struct utmpx utx; 23 FILE *ufp; 24 struct sysinfo info; 25 time_t tmptime; 26 struct tm *now; 27 unsigned int days, hours, minutes; 28 int nusers = 0; 29 size_t n; 30 31 ARGBEGIN { 32 default: 33 usage(); 34 } ARGEND; 35 36 if (sysinfo(&info) < 0) 37 eprintf("sysinfo:"); 38 time(&tmptime); 39 now = localtime(&tmptime); 40 printf(" %02d:%02d:%02d up ", now->tm_hour, now->tm_min, now->tm_sec); 41 info.uptime /= 60; 42 minutes = info.uptime % 60; 43 info.uptime /= 60; 44 hours = info.uptime % 24; 45 days = info.uptime / 24; 46 if (days) 47 printf("%d day%s, ", days, days != 1 ? "s" : ""); 48 if (hours) 49 printf("%2d:%02d, ", hours, minutes); 50 else 51 printf("%d min, ", minutes); 52 53 if ((ufp = fopen(UTMP_PATH, "r"))) { 54 while ((n = fread(&utx, sizeof(utx), 1, ufp)) > 0) { 55 if (!utx.ut_user[0]) 56 continue; 57 if (utx.ut_type != USER_PROCESS) 58 continue; 59 nusers++; 60 } 61 if (ferror(ufp)) 62 eprintf("%s: read error:", UTMP_PATH); 63 fclose(ufp); 64 printf(" %d user%s, ", nusers, nusers != 1 ? "s" : ""); 65 } 66 67 printf(" load average: %.02f, %.02f, %.02f\n", 68 info.loads[0] / 65536.0f, 69 info.loads[1] / 65536.0f, 70 info.loads[2] / 65536.0f); 71 72 return 0; 73 }