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Except stated otherwise in comment.
Fixes coding style. Formatting commits suck, incoherent coding style
sucks more.
https://suckless.org/coding_style/
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function prototype with unspecified argument is obsolete since c99.
additionally some of these function which don't take any argument were
being called with a `const char *` arg, which is UB.
fix both these issues by declararing ALL the components to accept a
`const char *`, and name the arg "unused" if it's meant to be ignored.
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this gives the compiler a chance to check weather the prototype and
definiton matches or not, which would catch issues like 3c47701.
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- Remove <errno.h> because related functions are in util.c now
- Remove corresponding <string.h> if not used otherwise
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Given slstatus is a tool that runs in the background, most likely run
from .xinitrc, it's important to prepend the name of the tool to error
messages so it becomes clear where the error is coming from.
To make this much more consistent, this commit adds warn() and die()
utility functions consistent with other suckless projects and adapts all
calls to fprintf(stderr, *) to the warn() and die() functions, greatly
increasing the readability of the code.
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Make use of strerror(errno) and format all errors equally:
function ['parameters']: error message
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Replace warn() and warnx() with fprintf() and add <stdio.h> where
necessary.
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This brings us a lot more tidiness.
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