compat/progexe.c

   1 #include "navymail/compat/progexe.h"
   2 #include "git-compat-util.h"
   3
   4 /*
   5  * Determine path to program executable
   6  * (based on example from http://stackoverflow.com/questions/2050961)
   7  */
   8 const char *xprogexe()
   9 {
  10         static char progexe_path[PATH_MAX+1];
  11
  12 #if defined(__linux__)
  13         ssize_t len = readlink("/proc/self/exe", progexe_path, PATH_MAX);
  14         if (len==-1)
  15                 die_errno("progexe: Cannot readlink /proc/self/exe");
  16
  17         progexe_path[len] = '\0';
  18
  19 #elif defined(_WIN32)
  20         /* XXX not tested */
  21         DWORD len = GetModuleFileNameA(NULL, progexe_path, PATH_MAX);
  22         if (!len)
  23                 /* TODO use GetLastError here */
  24                 die("progexe: GetModuleFileNameA(NULL) failed");
  25
  26 #elif defined(__APPLE__) /* elif of: #elif defined(__linux__) */
  27         /* XXX not tested, TODO cleanup */
  28 #include <mach-o/dyld.h>
  29         uint32_t pathNameSize = 0;
  30
  31         _NSGetExecutablePath(NULL, &pathNameSize);
  32
  33         if (pathNameSize > pathNameCapacity)
  34                 pathNameSize = pathNameCapacity;
  35
  36         if (!_NSGetExecutablePath(pathName, &pathNameSize))
  37         {
  38                 char real[PATH_MAX];
  39
  40                 if (realpath(pathName, real) != NULL)
  41                 {
  42                         pathNameSize = strlen(real);
  43                         strncpy(pathName, real, pathNameSize);
  44                 }
  45                 return pathNameSize;
  46         }
  47
  48         die("progexe: fail on apple");  /* XXX error code ? */
  49
  50 #else
  51         #error xprogexe: provide your own implementation
  52 #endif
  53
  54         return progexe_path;
  55 }