# Why usage function exit with code 129? 5 messages from 2012-01-06 to 2012-01-06. Participants: 徐迪, Nguyen Thai Ngoc Duy. Thread: https://gitlist.dev/t/29302 ## 徐迪, 2012-01-06 07:15 Subject: Why usage function exit with code 129? Message-ID: URL: https://gitlist.dev/e/CAMocUqSbiO2XC3PUEciyV3HxgqDPW_rTW-hYH4P%3DC%3DBFCSrQMQ%40mail.gmail.com ``` I did like this: $ git add --foo $ echo $? what I got is 129, should this code being used as program terminated due to a signal? Cause it's 128+1. According to this[1]. [1] http://tldp.org/LDP/abs/html/exitcodes.html ``` ## Nguyen Thai Ngoc Duy, 2012-01-06 07:22 Subject: Re: Why usage function exit with code 129? Message-ID: URL: https://gitlist.dev/e/CACsJy8Amo_9-9oCgHbwOZvTaNOV3Jj6wLCTU7nZT5LeA55%3DNEA%40mail.gmail.com In-Reply-To: ``` 2012/1/6 徐迪 : > I did like this: > $ git add --foo > $ echo $? > what I got is 129, should this code being used as program terminated > due to a signal? Cause it's 128+1. According to this[1]. usage() (in your case) always returns 129, die() 128. See 5d1a5c0 ([PATCH] Better error reporting for "git status") > [1] http://tldp.org/LDP/abs/html/exitcodes.html No it does not mean terminated by signals. -- Duy ``` ## 徐迪, 2012-01-06 08:06 Subject: Re: Why usage function exit with code 129? Message-ID: URL: https://gitlist.dev/e/CAMocUqSmes%2Bx_tkP6V0OM5rQ5wDGmMm%3DQ2MFBPhz6Qvzz_SOTg%40mail.gmail.com In-Reply-To: ``` >> [1] http://tldp.org/LDP/abs/html/exitcodes.html > > No it does not mean terminated by signals. > -- In that case, why not just use another code instead of the code that leads misunderstanding? I mean, as far as I know, exit code between 129 and 255 are used to indicate the program terminated by signal. So that usage function can only exit with code between 1 and 127. Am I wrong? ``` ## Nguyen Thai Ngoc Duy, 2012-01-06 08:11 Subject: Re: Why usage function exit with code 129? Message-ID: URL: https://gitlist.dev/e/CACsJy8D8uKGhtg4zjbHsJCGmqjTwodzFmAZ5w%3DaUx9CdadVAfw%40mail.gmail.com In-Reply-To: ``` 2012/1/6 徐迪 : >>> [1] http://tldp.org/LDP/abs/html/exitcodes.html >> >> No it does not mean terminated by signals. >> -- > In that case, why not just use another code instead of the code that > leads misunderstanding? I mean, as far as I know, exit code between > 129 and 255 are used to indicate the program terminated by signal. So > that usage function can only exit with code between 1 and 127. Am I > wrong? Because that code has been there too long (since 2005) any probably all git commands, including plumbing ones, rely on it. Changing it now may break existing scripts. -- Duy ``` ## 徐迪, 2012-01-06 08:18 Subject: Re: Why usage function exit with code 129? Message-ID: URL: https://gitlist.dev/e/CAMocUqR5NtLJTzEDXN6Os%3Db0w1aP6BMb6uphNJgZWKFT0dJy-Q%40mail.gmail.com In-Reply-To: ``` 在 2012年1月6日 下午4:11，Nguyen Thai Ngoc Duy 写道： > 2012/1/6 徐迪 : >>>> [1] http://tldp.org/LDP/abs/html/exitcodes.html >>> >>> No it does not mean terminated by signals. >>> -- >> In that case, why not just use another code instead of the code that >> leads misunderstanding? I mean, as far as I know, exit code between >> 129 and 255 are used to indicate the program terminated by signal. So >> that usage function can only exit with code between 1 and 127. Am I >> wrong? > > Because that code has been there too long (since 2005) any probably > all git commands, including plumbing ones, rely on it. Changing it now > may break existing scripts. > -- > Duy Ok, that sounds logical. ```