0000626: Extracting name from `#!/usr/bin/env interpreter` lines is imprecise

ID	Project	Category	View Status	Date Submitted	Last Update

0000626	file	General	public	2025-02-22 15:01	2025-02-22 15:01

Reporter	mgkurtz	Assigned To
Priority	low	Severity	text	Reproducibility	always
Status	new	Resolution	open
Platform	x86_64	OS	Debian	OS Version	testing
Product Version	5.46

Summary	0000626: Extracting name from `#!/usr/bin/env interpreter` lines is imprecise
Description	I just noticed a few subtleties concerning shebangs with `/usr/bin/env`: For reference, here is the responsible code from `Magdir/varied.script`: ``` 0 string/wt #!\ /usr/bin/env a >15 string/T >\0 %s script text executable ```
Steps To Reproduce	Here are some corner cases collected via Debian Code Search: A quite [common](https://codesearch.debian.net/search?q=%2Fusr%2Fbin%2Fenv+-S&literal=1) one: ``` #!/usr/bin/env -S make -f ``` Result: `a -S make -f script`. A [strange](https://codesearch.debian.net/search?q=%28%3Fm%29%5E%23%21++%2B%2F&literal=0) one: ``` #! /usr/bin/env tclsh ``` Result: `a v tclsh script`. Curiously, the result remains the same here, when one replaces the fixed offset `15` by a relative offset of `&0`. I guess that the `w` flag does not properly compute the offset for the continuation lines. And an [erroneous](https://codesearch.debian.net/search?q=%2Fusr%2Fbin%2Fenv%5Cw&literal=0) one: ``` #!/usr/bin/envthon ``` Result: `a hon script`.
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Date Modified	Username	Field	Change
2025-02-22 15:01	mgkurtz	New Issue