funny/realpath.c

   1 // http://stackoverflow.com/questions/284662/how-do-you-normalize-a-file-path-in-bash
   2 // also readlink -nf ~/xxx
   3 // realpath.c: display the absolute path to a file or directory.
   4 // Adam Liss, August, 2007
   5 // This program is provided "as-is" to the public domain, without express or
   6 // implied warranty, for any non-profit use, provided this notice is maintained.
   7
   8 #include <stdio.h>
   9 #include <stdlib.h>
  10 #include <string.h>
  11 #include <libgen.h>
  12 #include <limits.h>
  13
  14 static char *s_pMyName;
  15
  16 void usage(void);
  17
  18 int main(int argc, char *argv[])
  19 {
  20     char
  21         sPath[PATH_MAX];
  22
  23
  24     s_pMyName = strdup(basename(argv[0]));
  25
  26     if (argc < 2)
  27         usage();
  28
  29     printf("%s\n", realpath(argv[1], sPath));
  30     return 0;
  31 }
  32
  33 void usage(void)
  34 {
  35     fprintf(stderr, "usage: %s PATH\n", s_pMyName);
  36     exit(1);
  37 }
  38