prompt.c

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