4.3BSD - /usr/src/sys/conf/touch.c

   1: #include <sys/types.h>
   2: #include <sys/stat.h>
   3: main(argc, argv)
   4:     int argc;
   5:     char **argv;
   6: {
   7: 
   8:     argc--, argv++;
   9:     while (argc > 0) {
  10:         struct stat stb; int c, f;
  11:         if (stat(*argv, &stb) < 0)
  12:             goto bad;
  13:         if (chmod(*argv, stb.st_mode | 0200) < 0)
  14:             goto bad;
  15:         f = open(*argv, 2);
  16:         if (f < 0)
  17:             goto bad;
  18:         lseek(f, 0, 0);
  19:         read(f, &c, 1);
  20:         lseek(f, 0, 0);
  21:         write(f, &c, 1);
  22:         close(f);
  23:         chmod(*argv, stb.st_mode);
  24:         argc--, argv++;
  25:         continue;
  26: bad:
  27:         perror(*argv);
  28:         argc--, argv++;
  29:         continue;
  30:     }
  31: }

Defined functions