lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
Open Source and information security mailing list archives
| ||
|
Date: Sun, 29 Mar 2009 06:01:48 +0200 From: Daniel Mack <daniel@...aq.de> To: kernel list <linux-kernel@...r.kernel.org> Subject: include-police.sh Hi, I hacked a small and dumb shell script awhile ago that can help finding superfluous include files. Even though it's far from perfect (see the inline comments), its output had helped occasionally, so I wanted to share this, also in relationship to the 'reverse Xmas tree' thread. Comments welcome :) Daniel #!/bin/sh # # Find possibly unneeded include files in C/C++ files # Daniel Mack <daniel@...aq.de>, GPLv2 # # The script searches for includes in the given file and removes them, one # after the other. After each cycle, 'make' is called to build the object # file. Includes found safe to omit (i.e., the removal did not break the # built) are echoed, and the file is reset to its original state # again. # # At the end of the script, the file will be restored to what it was in # the beginning. # # Limitations/bugs: # * The output is only to be taken as _hint_ for developers # * The script is not aware of conditional includes # * Include files that do forward declarations of locally implemented # symbols are erroneously reported superfluous # * Depends on 'make' as build tool and the object file is expected # to be at the same location as the source file # * Doesn't report anything when the built fails anyway (for other reasons) # file=$1 if [ -z "$file" ]; then echo "Usage: $0 <file> [build params]"; exit 1; fi if [ ! -f "$file" ]; then echo "$0: unable to open file $file"; exit 2; fi tmp=/tmp/$(basename $file)-$$ orig=/tmp/$(basename $file).orig-$$ obj=${file%%.c}.o shift cp $file $orig for include in $(grep ^#include $file | cut -f2 -d' '); do echo checking $include ... cp $orig $tmp grep -v '^#include '$include $tmp > $file make $* $obj >/dev/null 2>&1 [ $? -eq 0 ] && echo --- $include can be omitted done cp $orig $file rm -f $tmp $orig -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
Powered by blists - more mailing lists