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Help me understand bash syntax (programming.dev)

submitted 3 weeks ago by emotional_soup_88@programming.dev to c/linux@programming.dev

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I was trying to find all symbolic links in /usr/lib and use file on the first entry in the list, which I delimited with head -n 1.

Why does find /usr/lib -maxdepth 1 -type l | file $(head -n 1) work but find /usr/lib -maxdepth 1 -type l | head -n 1 | file does not?

It complains that I am not using file correctly. Probably because it lacks an argument, but - programmatically/syntactically - why can't file grab it's argument from the pipe?

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[–] N0x0n@lemmy.ml 6 points 3 weeks ago (1 children)

I learned this the hardway with ffmpeg... In my defense... Their documentation IS huge !!!

Kinda interested if 2>&1 would also work in this case?

[–] theit8514@lemmy.world 11 points 3 weeks ago (1 children)

2>&1 pipes stderr to stdout, which would not affect a binary like file which doesn't parse stdin. You would need something like xargs file which would convert the stdout to command line arguments.

[–] N0x0n@lemmy.ml 2 points 2 weeks ago

Thanks for the clarification :)) still new the all the bash syntax and always interested to hear what more skilled people have to say !