1795165bc1512faa121083c6bf3ce6f6d83ce59e6Ken Sumrall#include <stdio.h> 2795165bc1512faa121083c6bf3ce6f6d83ce59e6Ken Sumrall#include <string.h> 3795165bc1512faa121083c6bf3ce6f6d83ce59e6Ken Sumrall#include <sys/types.h> 4795165bc1512faa121083c6bf3ce6f6d83ce59e6Ken Sumrall#include <fcntl.h> 5795165bc1512faa121083c6bf3ce6f6d83ce59e6Ken Sumrall#include <sys/stat.h> 6795165bc1512faa121083c6bf3ce6f6d83ce59e6Ken Sumrall#include <stdlib.h> 7795165bc1512faa121083c6bf3ce6f6d83ce59e6Ken Sumrall#include <fcntl.h> 813495a1cbb6c6b7ec617488f272bc02f2107a63cKen Sumrall#include <time.h> 9795165bc1512faa121083c6bf3ce6f6d83ce59e6Ken Sumrall 10795165bc1512faa121083c6bf3ce6f6d83ce59e6Ken Sumrallstatic void usage(void) 11795165bc1512faa121083c6bf3ce6f6d83ce59e6Ken Sumrall{ 1213495a1cbb6c6b7ec617488f272bc02f2107a63cKen Sumrall fprintf(stderr, "touch: usage: touch [-alm] [-t YYYYMMDD[.hhmmss]] <file>\n"); 13795165bc1512faa121083c6bf3ce6f6d83ce59e6Ken Sumrall exit(1); 14795165bc1512faa121083c6bf3ce6f6d83ce59e6Ken Sumrall} 15795165bc1512faa121083c6bf3ce6f6d83ce59e6Ken Sumrall 1613495a1cbb6c6b7ec617488f272bc02f2107a63cKen Sumrallstatic time_t parse_time(char *s) 1713495a1cbb6c6b7ec617488f272bc02f2107a63cKen Sumrall{ 1813495a1cbb6c6b7ec617488f272bc02f2107a63cKen Sumrall struct tm tm; 1913495a1cbb6c6b7ec617488f272bc02f2107a63cKen Sumrall int day = atoi(s); 2013495a1cbb6c6b7ec617488f272bc02f2107a63cKen Sumrall int hour = 0; 2113495a1cbb6c6b7ec617488f272bc02f2107a63cKen Sumrall 2213495a1cbb6c6b7ec617488f272bc02f2107a63cKen Sumrall while (*s && *s != '.') { 2313495a1cbb6c6b7ec617488f272bc02f2107a63cKen Sumrall s++; 2413495a1cbb6c6b7ec617488f272bc02f2107a63cKen Sumrall } 2513495a1cbb6c6b7ec617488f272bc02f2107a63cKen Sumrall 2613495a1cbb6c6b7ec617488f272bc02f2107a63cKen Sumrall if (*s) { 2713495a1cbb6c6b7ec617488f272bc02f2107a63cKen Sumrall s++; 2813495a1cbb6c6b7ec617488f272bc02f2107a63cKen Sumrall hour = atoi(s); 2913495a1cbb6c6b7ec617488f272bc02f2107a63cKen Sumrall } 3013495a1cbb6c6b7ec617488f272bc02f2107a63cKen Sumrall 3113495a1cbb6c6b7ec617488f272bc02f2107a63cKen Sumrall tm.tm_year = day / 10000 - 1900; 3213495a1cbb6c6b7ec617488f272bc02f2107a63cKen Sumrall tm.tm_mon = (day % 10000) / 100 - 1; 3313495a1cbb6c6b7ec617488f272bc02f2107a63cKen Sumrall tm.tm_mday = day % 100; 3413495a1cbb6c6b7ec617488f272bc02f2107a63cKen Sumrall tm.tm_hour = hour / 10000; 3513495a1cbb6c6b7ec617488f272bc02f2107a63cKen Sumrall tm.tm_min = (hour % 10000) / 100; 3613495a1cbb6c6b7ec617488f272bc02f2107a63cKen Sumrall tm.tm_sec = hour % 100; 3713495a1cbb6c6b7ec617488f272bc02f2107a63cKen Sumrall tm.tm_isdst = -1; 3813495a1cbb6c6b7ec617488f272bc02f2107a63cKen Sumrall 3913495a1cbb6c6b7ec617488f272bc02f2107a63cKen Sumrall return mktime(&tm); 4013495a1cbb6c6b7ec617488f272bc02f2107a63cKen Sumrall} 4113495a1cbb6c6b7ec617488f272bc02f2107a63cKen Sumrall 42795165bc1512faa121083c6bf3ce6f6d83ce59e6Ken Sumrallint touch_main(int argc, char *argv[]) 43795165bc1512faa121083c6bf3ce6f6d83ce59e6Ken Sumrall{ 44795165bc1512faa121083c6bf3ce6f6d83ce59e6Ken Sumrall int i, fd, aflag = 0, mflag = 0, debug = 0, flags = 0; 45795165bc1512faa121083c6bf3ce6f6d83ce59e6Ken Sumrall struct timespec specified_time, times[2]; 46795165bc1512faa121083c6bf3ce6f6d83ce59e6Ken Sumrall char *file = 0; 47795165bc1512faa121083c6bf3ce6f6d83ce59e6Ken Sumrall 48795165bc1512faa121083c6bf3ce6f6d83ce59e6Ken Sumrall specified_time.tv_nsec = UTIME_NOW; 49795165bc1512faa121083c6bf3ce6f6d83ce59e6Ken Sumrall 50795165bc1512faa121083c6bf3ce6f6d83ce59e6Ken Sumrall for (i = 1; i < argc; i++) { 51795165bc1512faa121083c6bf3ce6f6d83ce59e6Ken Sumrall if (argv[i][0] == '-') { 52795165bc1512faa121083c6bf3ce6f6d83ce59e6Ken Sumrall /* an option */ 53795165bc1512faa121083c6bf3ce6f6d83ce59e6Ken Sumrall const char *arg = argv[i]+1; 54795165bc1512faa121083c6bf3ce6f6d83ce59e6Ken Sumrall while (arg[0]) { 55795165bc1512faa121083c6bf3ce6f6d83ce59e6Ken Sumrall switch (arg[0]) { 56795165bc1512faa121083c6bf3ce6f6d83ce59e6Ken Sumrall case 'a': aflag = 1; break; 57795165bc1512faa121083c6bf3ce6f6d83ce59e6Ken Sumrall case 'm': mflag = 1; break; 58795165bc1512faa121083c6bf3ce6f6d83ce59e6Ken Sumrall case 't': 59795165bc1512faa121083c6bf3ce6f6d83ce59e6Ken Sumrall if ((i+1) >= argc) 60795165bc1512faa121083c6bf3ce6f6d83ce59e6Ken Sumrall usage(); 6113495a1cbb6c6b7ec617488f272bc02f2107a63cKen Sumrall specified_time.tv_sec = parse_time(argv[++i]); 6213495a1cbb6c6b7ec617488f272bc02f2107a63cKen Sumrall if (specified_time.tv_sec == -1) { 6313495a1cbb6c6b7ec617488f272bc02f2107a63cKen Sumrall fprintf(stderr, "touch: invalid timestamp specified\n"); 64795165bc1512faa121083c6bf3ce6f6d83ce59e6Ken Sumrall exit(1); 65795165bc1512faa121083c6bf3ce6f6d83ce59e6Ken Sumrall } 66795165bc1512faa121083c6bf3ce6f6d83ce59e6Ken Sumrall specified_time.tv_nsec = 0; 67795165bc1512faa121083c6bf3ce6f6d83ce59e6Ken Sumrall break; 68795165bc1512faa121083c6bf3ce6f6d83ce59e6Ken Sumrall case 'l': flags |= AT_SYMLINK_NOFOLLOW; break; 69795165bc1512faa121083c6bf3ce6f6d83ce59e6Ken Sumrall case 'd': debug = 1; break; 70795165bc1512faa121083c6bf3ce6f6d83ce59e6Ken Sumrall default: 71795165bc1512faa121083c6bf3ce6f6d83ce59e6Ken Sumrall usage(); 72795165bc1512faa121083c6bf3ce6f6d83ce59e6Ken Sumrall } 73795165bc1512faa121083c6bf3ce6f6d83ce59e6Ken Sumrall arg++; 74795165bc1512faa121083c6bf3ce6f6d83ce59e6Ken Sumrall } 75795165bc1512faa121083c6bf3ce6f6d83ce59e6Ken Sumrall } else { 76795165bc1512faa121083c6bf3ce6f6d83ce59e6Ken Sumrall /* not an option, and only accept one filename */ 77795165bc1512faa121083c6bf3ce6f6d83ce59e6Ken Sumrall if (i+1 != argc) 78795165bc1512faa121083c6bf3ce6f6d83ce59e6Ken Sumrall usage(); 79795165bc1512faa121083c6bf3ce6f6d83ce59e6Ken Sumrall file = argv[i]; 80795165bc1512faa121083c6bf3ce6f6d83ce59e6Ken Sumrall } 81795165bc1512faa121083c6bf3ce6f6d83ce59e6Ken Sumrall } 82795165bc1512faa121083c6bf3ce6f6d83ce59e6Ken Sumrall 83795165bc1512faa121083c6bf3ce6f6d83ce59e6Ken Sumrall if (! file) { 84795165bc1512faa121083c6bf3ce6f6d83ce59e6Ken Sumrall fprintf(stderr, "touch: no file specified\n"); 85795165bc1512faa121083c6bf3ce6f6d83ce59e6Ken Sumrall exit(1); 86795165bc1512faa121083c6bf3ce6f6d83ce59e6Ken Sumrall } 87795165bc1512faa121083c6bf3ce6f6d83ce59e6Ken Sumrall 88795165bc1512faa121083c6bf3ce6f6d83ce59e6Ken Sumrall if (access(file, F_OK)) 89795165bc1512faa121083c6bf3ce6f6d83ce59e6Ken Sumrall if ((fd=creat(file, 0666)) != -1) 90795165bc1512faa121083c6bf3ce6f6d83ce59e6Ken Sumrall close(fd); 91795165bc1512faa121083c6bf3ce6f6d83ce59e6Ken Sumrall 92795165bc1512faa121083c6bf3ce6f6d83ce59e6Ken Sumrall if ((mflag == 0) && (aflag == 0)) 93795165bc1512faa121083c6bf3ce6f6d83ce59e6Ken Sumrall aflag = mflag = 1; 94795165bc1512faa121083c6bf3ce6f6d83ce59e6Ken Sumrall 95795165bc1512faa121083c6bf3ce6f6d83ce59e6Ken Sumrall if (aflag) 96795165bc1512faa121083c6bf3ce6f6d83ce59e6Ken Sumrall times[0] = specified_time; 97795165bc1512faa121083c6bf3ce6f6d83ce59e6Ken Sumrall else 98795165bc1512faa121083c6bf3ce6f6d83ce59e6Ken Sumrall times[0].tv_nsec = UTIME_OMIT; 99795165bc1512faa121083c6bf3ce6f6d83ce59e6Ken Sumrall 100795165bc1512faa121083c6bf3ce6f6d83ce59e6Ken Sumrall if (mflag) 101795165bc1512faa121083c6bf3ce6f6d83ce59e6Ken Sumrall times[1] = specified_time; 102795165bc1512faa121083c6bf3ce6f6d83ce59e6Ken Sumrall else 103795165bc1512faa121083c6bf3ce6f6d83ce59e6Ken Sumrall times[1].tv_nsec = UTIME_OMIT; 104795165bc1512faa121083c6bf3ce6f6d83ce59e6Ken Sumrall 105795165bc1512faa121083c6bf3ce6f6d83ce59e6Ken Sumrall if (debug) { 106795165bc1512faa121083c6bf3ce6f6d83ce59e6Ken Sumrall fprintf(stderr, "file = %s\n", file); 107795165bc1512faa121083c6bf3ce6f6d83ce59e6Ken Sumrall fprintf(stderr, "times[0].tv_sec = %ld, times[0].tv_nsec = %ld\n", times[0].tv_sec, times[0].tv_nsec); 108795165bc1512faa121083c6bf3ce6f6d83ce59e6Ken Sumrall fprintf(stderr, "times[1].tv_sec = %ld, times[1].tv_nsec = %ld\n", times[1].tv_sec, times[1].tv_nsec); 109795165bc1512faa121083c6bf3ce6f6d83ce59e6Ken Sumrall fprintf(stderr, "flags = 0x%8.8x\n", flags); 110795165bc1512faa121083c6bf3ce6f6d83ce59e6Ken Sumrall } 111795165bc1512faa121083c6bf3ce6f6d83ce59e6Ken Sumrall 112795165bc1512faa121083c6bf3ce6f6d83ce59e6Ken Sumrall return utimensat(AT_FDCWD, file, times, flags); 113795165bc1512faa121083c6bf3ce6f6d83ce59e6Ken Sumrall} 114795165bc1512faa121083c6bf3ce6f6d83ce59e6Ken Sumrall 115