chad/experimental/program_directory.c


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#include <limits.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <errno.h>
#include <chad/experimental/program_directory.h>
int program_directory(char * filename) {
  char path[PATH_MAX], * terminator;
  if (!realpath(filename, path)
  ||  !(terminator = strrchr(path, '/'))) { return -1; }
  *terminator = '\0';
  return chdir(path);
}