exec.c

   1 #include <windows.h>
   2 #include <stdio.h>
   3 #include "debug.h"
   4 #include "systeminfo.h"
   5 #include "exec.h"
   6
   7 char *env_for_git()
   8 {
   9         static char *environment;
  10
  11         /*
  12          * if we can't find path to msys in the registry, return NULL and
  13          * the CreateProcess will copy the environment for us
  14          */
  15         if (!environment && msys_path()) {
  16                 char *old = GetEnvironmentStrings();
  17                 size_t space = 0, path_index = -1, name_len = 0, len2;
  18
  19                 while (old[space]) {
  20                         /* if it's PATH variable (could be Path= too!) */
  21                         if (!strnicmp(old + space, "PATH=", 5)) {
  22                                 path_index = space;
  23                                 name_len = 5;
  24                         }
  25
  26                         while (old[space])
  27                                 space++;
  28                         space++; /* skip var-terminating NULL */
  29                 }
  30
  31                 if (path_index == -1)
  32                         path_index = space;
  33
  34                 environment = malloc(space +
  35                                 2 * strlen(msys_path()) + 32);
  36
  37                 /* copy the block up to the equal sign of PATH var */
  38                 memcpy(environment, old, path_index);
  39                 /* insert new segments of the PATH */
  40                 len2 = sprintf(environment + path_index,
  41                         "PATH=%s\\bin;%s\\mingw\\bin%s",
  42                         msys_path(), msys_path(), name_len ? ";" : "");
  43                 /* append original value of PATH and variables after it */
  44                 memcpy(environment + path_index + len2,
  45                         old + path_index + name_len,
  46                         space + 1 - path_index - name_len);
  47
  48                 FreeEnvironmentStrings(old);
  49         }
  50
  51         return environment;
  52 }
  53
  54 void exec_gui(char *command, const char *wd)
  55 {
  56         STARTUPINFO si = { sizeof(si) };
  57         PROCESS_INFORMATION pi;
  58
  59         si.dwFlags = STARTF_USESHOWWINDOW;
  60         si.wShowWindow = SW_HIDE;
  61
  62         debug_git("Trying to spawn '%s' in working directory '%s'\n",
  63                 command, wd);
  64         if (CreateProcess(NULL, command, NULL, NULL, FALSE, 0,
  65                         env_for_git(), wd, &si, &pi))
  66         {
  67                 CloseHandle(pi.hProcess);
  68                 CloseHandle(pi.hThread);
  69         }
  70         else
  71                 debug_git("[ERROR] Could not create process (%d)"
  72                         "wd: %s; cmd: %s",
  73                         GetLastError(), wd, command);
  74
  75 }
  76