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Posted By

mwb1100 on 11/05/10


Tagged

domain public prtpath


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prtpath.c

 / Published in: C
 

Public domain snippet that dumps a path (or other list of directories in a specified environment variable) with one directory per line.

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  1. #include <stdio.h>
  2. #include <stdlib.h>
  3. #include <assert.h>
  4. #include <string.h>
  5.  
  6. /* 
  7.     get strdup() and strtok_r() from other snippets if needed
  8.  */
  9.  
  10. #ifdef _WIN32
  11. static char const* path_separators=";";
  12. #else
  13. static char const* path_separators=":";
  14. #endif
  15.  
  16.  
  17. int main( int argc, char** argv)
  18. {
  19.     char* pPath;
  20.     char const* envvar = "PATH";
  21.  
  22.     if (argc > 1) {
  23.         envvar = argv[1];
  24.     }
  25.  
  26.     pPath = getenv(envvar);
  27.  
  28.     if (!pPath) pPath = "";
  29.  
  30.     pPath = strdup( pPath);
  31.  
  32.     if (!pPath) {
  33.         return 1;
  34.     }
  35.  
  36.  
  37.     if (pPath!=NULL) {
  38.         char* context = NULL;
  39.         char* pDir = NULL;
  40.  
  41.         for (pDir = strtok_r( pPath, path_separators, &context); 
  42.              pDir != NULL; 
  43.              pDir = strtok_r( NULL, path_separators, &context)) {
  44.  
  45.             printf("%s\n", pDir);
  46.         }
  47.     }
  48.  
  49.     free( pPath);
  50.  
  51.     return 0;
  52. }

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