prompt.c

   1 #include "git-compat-util.h"
   2 #include "config.h"
   3 #include "environment.h"
   4 #include "run-command.h"
   5 #include "strbuf.h"
   6 #include "prompt.h"
   7 #include "compat/terminal.h"
   8
   9 static char *do_askpass(const char *cmd, const char *prompt)
  10 {
  11         struct child_process pass = CHILD_PROCESS_INIT;
  12         static struct strbuf buffer = STRBUF_INIT;
  13         int err = 0;
  14
  15         strvec_push(&pass.args, cmd);
  16         strvec_push(&pass.args, prompt);
  17
  18         pass.out = -1;
  19
  20         if (start_command(&pass))
  21                 return NULL;
  22
  23         strbuf_reset(&buffer);
  24         if (strbuf_read(&buffer, pass.out, 20) < 0)
  25                 err = 1;
  26
  27         close(pass.out);
  28
  29         if (finish_command(&pass))
  30                 err = 1;
  31
  32         if (err) {
  33                 error("unable to read askpass response from '%s'", cmd);
  34                 strbuf_release(&buffer);
  35                 return NULL;
  36         }
  37
  38         strbuf_setlen(&buffer, strcspn(buffer.buf, "\r\n"));
  39
  40         return buffer.buf;
  41 }
  42
  43 char *git_prompt(const char *prompt, int flags)
  44 {
  45         char *r = NULL;
  46
  47         if (flags & PROMPT_ASKPASS) {
  48                 const char *askpass;
  49
  50                 askpass = getenv("GIT_ASKPASS");
  51                 if (!askpass)
  52                         askpass = askpass_program;
  53                 if (!askpass)
  54                         askpass = getenv("SSH_ASKPASS");
  55                 if (askpass && *askpass)
  56                         r = do_askpass(askpass, prompt);
  57         }
  58
  59         if (!r) {
  60                 const char *err;
  61
  62                 if (git_env_bool("GIT_TERMINAL_PROMPT", 1)) {
  63                         r = git_terminal_prompt(prompt, flags & PROMPT_ECHO);
  64                         err = strerror(errno);
  65                 } else {
  66                         err = "terminal prompts disabled";
  67                 }
  68                 if (!r) {
  69                         /* prompts already contain ": " at the end */
  70                         die("could not read %s%s", prompt, err);
  71                 }
  72         }
  73         return r;
  74 }
  75
  76 int git_read_line_interactively(struct strbuf *line)
  77 {
  78         int ret;
  79
  80         fflush(stdout);
  81         ret = strbuf_getline_lf(line, stdin);
  82         if (ret != EOF)
  83                 strbuf_trim_trailing_newline(line);
  84
  85         return ret;
  86 }