git

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#include "git-compat-util.h"
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#include "parse.h"
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#include "environment.h"
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#include "run-command.h"
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#include "strbuf.h"
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#include "prompt.h"
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#include "compat/terminal.h"
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static char *do_askpass(const char *cmd, const char *prompt)
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{
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	struct child_process pass = CHILD_PROCESS_INIT;
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	static struct strbuf buffer = STRBUF_INIT;
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	int err = 0;
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	strvec_push(&pass.args, cmd);
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	strvec_push(&pass.args, prompt);
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	pass.out = -1;
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	if (start_command(&pass))
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		return NULL;
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	strbuf_reset(&buffer);
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	if (strbuf_read(&buffer, pass.out, 20) < 0)
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		err = 1;
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	close(pass.out);
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	if (finish_command(&pass))
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		err = 1;
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	if (err) {
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		error("unable to read askpass response from '%s'", cmd);
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		strbuf_release(&buffer);
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		return NULL;
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	}
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	strbuf_setlen(&buffer, strcspn(buffer.buf, "\r\n"));
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	return buffer.buf;
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}
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char *git_prompt(const char *prompt, int flags)
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{
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	char *r = NULL;
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	if (flags & PROMPT_ASKPASS) {
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		const char *askpass;
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		askpass = getenv("GIT_ASKPASS");
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		if (!askpass)
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			askpass = askpass_program;
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		if (!askpass)
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			askpass = getenv("SSH_ASKPASS");
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		if (askpass && *askpass)
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			r = do_askpass(askpass, prompt);
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	}
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	if (!r) {
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		const char *err;
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		if (git_env_bool("GIT_TERMINAL_PROMPT", 1)) {
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			r = git_terminal_prompt(prompt, flags & PROMPT_ECHO);
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			err = strerror(errno);
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		} else {
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			err = "terminal prompts disabled";
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		}
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		if (!r) {
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			/* prompts already contain ": " at the end */
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			die("could not read %s%s", prompt, err);
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		}
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	}
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	return r;
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}
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int git_read_line_interactively(struct strbuf *line)
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{
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	int ret;
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	fflush(stdout);
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	ret = strbuf_getline_lf(line, stdin);
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	if (ret != EOF)
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		strbuf_trim_trailing_newline(line);
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	return ret;
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}
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