prompt.c

   1 #include "cache.h"
   2 #include "run-command.h"
   3 #include "strbuf.h"
   4 #include "prompt.h"
   5
   6 static char *do_askpass(const char *cmd, const char *prompt)
   7 {
   8         struct child_process pass;
   9         const char *args[3];
  10         static struct strbuf buffer = STRBUF_INIT;
  11
  12         args[0] = cmd;
  13         args[1] = prompt;
  14         args[2] = NULL;
  15
  16         memset(&pass, 0, sizeof(pass));
  17         pass.argv = args;
  18         pass.out = -1;
  19
  20         if (start_command(&pass))
  21                 exit(1);
  22
  23         strbuf_reset(&buffer);
  24         if (strbuf_read(&buffer, pass.out, 20) < 0)
  25                 die("failed to get '%s' from %s\n", prompt, cmd);
  26
  27         close(pass.out);
  28
  29         if (finish_command(&pass))
  30                 exit(1);
  31
  32         strbuf_setlen(&buffer, strcspn(buffer.buf, "\r\n"));
  33
  34         return buffer.buf;
  35 }
  36
  37 char *git_prompt(const char *prompt, int flags)
  38 {
  39         char *r;
  40
  41         if (flags & PROMPT_ASKPASS) {
  42                 const char *askpass;
  43
  44                 askpass = getenv("GIT_ASKPASS");
  45                 if (!askpass)
  46                         askpass = askpass_program;
  47                 if (!askpass)
  48                         askpass = getenv("SSH_ASKPASS");
  49                 if (askpass && *askpass)
  50                         return do_askpass(askpass, prompt);
  51         }
  52
  53         r = getpass(prompt);
  54         if (!r)
  55                 die_errno("could not read '%s'", prompt);
  56         return r;
  57 }
  58
  59 char *git_getpass(const char *prompt)
  60 {
  61         return git_prompt(prompt, PROMPT_ASKPASS);
  62 }