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| alt.msdos.batch.nt | Fun with Windows NT batch files | 68,980 messages |
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| Message 67,349 of 68,980 |
| probyn@berkeley.edu to All |
| Re: GOTO and non existant label |
| 06 Dec 18 10:04:26 |
On Tuesday, December 4, 2018 at 1:15:24 PM UTC-8, JJ wrote: > How to prevent the batch file from abruptly terminated if `goto` is executed > with a non existing label? > > I know that I can simply refactor the code, but it's a last resort. > > e.g. > > set /p "num=input task number: " > goto task%num% > rem this line is never executed if label doesn't exist > echo invalid task number > goto :eof > > :task1 > echo task1... > goto next > > :task2 > echo task2... > goto next > > :next > echo further tasks... (((screen capture best viewed with fixed-width font))) File=testlabel.cmd Line ····.····1····.····2····.····3· ··.····4····.····5····. 00001. @echo off 00002. if "%1"=="" goto :ERROR 00003. findstr /b /c:":%1" %~f0 >nul 00004. if %errorlevel% gtr 0 goto :ERROR 00005. 00006. :func1 00007. goto :VALID 00008. 00009. :func2 00010. goto :VALID 00011. 00012. :exec3 00013. goto :VALID 00014. 00015. :VALID 00016. echo/%1: Valid label....&pause>nul 00017. goto :EXIT 00018. 00019. :ERROR 00020. echo/OOPS^^! Label %1 not found. 00021. pause>nul 00022. 00023. :EXIT 00024. goto :EOF ─────────────────────⠀───────────────────── ”€â”€â”€â”€â”€â”€â”€â”€â”€â”€â”€â”€â”€â”€â”€â”€â”€â”€â”€ C:\Users\JoeUser\temp: testlabel OOPS! Label not found. C:\Users\JoeUser\temp: testlabel xyz OOPS! Label xyz not found. C:\Users\JoeUser\temp: testlabel VALID VALID: Valid label.... C:\Users\JoeUser\temp: testlabel func2 func2: Valid label.... C:\Users\JoeUser\temp: (((end screen capture Win 10))) --- SoupGate-Win32 v1.05 * Origin: you cannot sedate... all the things you hate (1:229/2) |
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