Shell script allowing to find errno definitions and descriptions in the kernel source.
Signed-off-by: Bartosz Golaszewski <[email protected]> --- This is a simple script I use when seeing messages like: some_func() failed: -123 to find out the actual errno meaning. The usage is very simple - just call 'scripts/kerrno.sh 1 4 -50 (...)'. I'm sending this as RFC in order to find out if there's any interest in merging this script with the kernel code. scripts/kerrno.sh | 62 +++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 62 insertions(+) create mode 100755 scripts/kerrno.sh diff --git a/scripts/kerrno.sh b/scripts/kerrno.sh new file mode 100755 index 0000000..ebdc8da --- /dev/null +++ b/scripts/kerrno.sh @@ -0,0 +1,62 @@ +#!/bin/sh + +# Get preprocessor definitions and descriptions of errno numbers from the +# Linux kernel source. +# +# This script parses all the C headers containing errno definitions in the +# Linux source tree and extracts their definitions and corresponding +# descriptions in order to quickly give users an idea on what kind of +# an error they're dealing with. +# +# Example: +# scripts/kerrno.sh 43 -12 3 +# +# Should be called from the top of the source tree. +# +# Copyright (C) 2015 Bartosz Golaszewski <[email protected]> + +FILEPTRN=".*errno.*\.[ch]$" +ERRNOPTRN="\#define[\ \t]+E[A-Z0-9]+[\ \t]+[0-9]+[\ \t]+" + +usage() +{ + echo "$0: get info for error numbers" + echo + echo "Usage:" + echo "\t$0 <errno numbers>" + echo + echo "\tExample: $0 -18 34 128" + echo +} + +if [ "$#" -eq "0" ] || ([ "$#" -eq "1" ] && [ "$1" = "--help" ]) +then + usage + exit +fi + +for WANTED in $@ +do + case ${WANTED#-} in + ''|*[!0-9]*) + echo "$WANTED: not a number"; + continue; + ;; + esac + + test "$WANTED" -lt "0" && WANTED=$(echo -n $WANTED | cut -d'-' -f2) + + echo "Errno $WANTED:" + find ./ -regex "$FILEPTRN" -exec grep -nPH "$ERRNOPTRN" {} \; \ + | tr -s ':' ' ' \ + | tr -s '\t' ' ' \ + | cut -d' ' -f1,2,4,5 | while read FILE LINE ERRNO NUM + do + if [ "$NUM" -eq "$WANTED" ] + then + echo -n "\t$ERRNO (" + echo -n "$(head $FILE -n $LINE | tail -1 | cut -d'*' -f2)" + echo ") defined in $FILE:$LINE" + fi + done +done -- 2.1.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
