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2014-01-02Revert "prompt: clean up strbuf usage"Jeff King
This reverts commit 31b49d9b653803e7c7fd18b21c8bdd86e3421668. That commit taught do_askpass to hand ownership of our buffer back to the caller rather than simply return a pointer into our internal strbuf. What it failed to notice, though, was that our internal strbuf is static, because we are trying to emulate the getpass() interface. By handing off ownership, we created a memory leak that cannot be solved. Sometimes git_prompt returns a static buffer from getpass() (or our smarter git_terminal_prompt wrapper), and sometimes it returns an allocated string from do_askpass. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2012-02-03prompt: fall back to terminal if askpass failsJeff King
The current askpass code simply dies if calling an askpass helper fails. Worse, in some failure modes it doesn't even print an error (if start_command fails, then it prints its own error; if reading fails, we print an error; but if the command exits non-zero, finish_command fails and we print nothing!). Let's be more kind to the user by printing an error message when askpass doesn't work out, and then falling back to the terminal (which also may fail, of course, but we die already there with a nice message). While we're at it, let's clean up the existing error messages a bit. Now that our prompts are very long and contain quotes and colons themselves, our error messages are hard to read. So the new failure modes look like: [before, with a terminal] $ GIT_ASKPASS=false git push $ echo $? 128 [before, with no terminal, and we must give up] $ setsid git push fatal: could not read 'Password for 'https://peff@github.com': ': No such device or address [after, with a terminal] $ GIT_ASKPASS=false git push error: unable to read askpass response from 'false' Password for 'https://peff@github.com': [after, with no terminal, and we must give up] $ GIT_ASKPASS=false setsid git push error: unable to read askpass response from 'false' fatal: could not read Password for 'https://peff@github.com': No such device or address Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2012-02-03prompt: clean up strbuf usageJeff King
The do_askpass function inherited a few bad habits from the original git_getpass. One, there's no need to strbuf_reset a buffer which was just initialized. And two, it's a good habit to use strbuf_detach to claim ownership of a buffer's string (even though in this case the owning buffer goes out of scope, so it's effectively the same thing). Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2011-12-13prompt: use git_terminal_promptJeff King
Our custom implementation of git_terminal_prompt has many advantages over regular getpass(), as described in the prior commit. This also lets us implement a PROMPT_ECHO flag for callers who want it. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2011-12-13refactor git_getpass into generic prompt functionJeff King
This will allow callers to specify more options (e.g., leaving echo on). The original git_getpass becomes a slim wrapper around the new function. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>
2011-12-13move git_getpass to its own source fileJeff King
This is currently in connect.c, but really has nothing to do with the git protocol itself. Let's make a new source file all about prompting the user, which will make it cleaner to refactor. Signed-off-by: Jeff King <peff@peff.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>