Files
git/prompt.c
Johannes Sixt 711a20827b interactive: do strip trailing CRLF from input
`git reset -p file` on a Windows CMD refuses to do anything useful
with this error message:

    (1/5) Unstage this hunk [y,n,q,a,d,j,J,g,/,e,p,?]? n
    'nly one letter is expected, got 'n

The letter 'O' at the beginning of the line is overwritten by an
apostrophe, so, clearly the parser sees the string "n\r".

strbuf_trim_trailing_newline() removes trailing CRLF from the string.
In particular, it first removes LF if present, and if that was the
case, it also removes CR if present.

git_read_line_interactively() clearly intends to remove CRLF as it
calls strbuf_trim_trailing_newline(). However, input is gathered using
strbuf_getline_lf(), which already removes the trailing LF. Now
strbuf_trim_trailing_newline() does not see LF, so that it does not
remove CR, either, and leaves it for the caller to process.

Call strbuf_getline() instead, which removes both LF and CR.

Signed-off-by: Johannes Sixt <j6t@kdbg.org>
Signed-off-by: Junio C Hamano <gitster@pobox.com>
2025-07-31 14:17:54 -07:00

83 lines
1.6 KiB
C

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