That file should be sourced (.) from 'bashrc' (or 'bash_aliases'). It contains functions that are useful for the maintenance of this project. - grep_syscall() - grep_syscall_def() - man_section() - man_lsfunc() - pdfman() - grep_glibc_prototype() Signed-off-by: Alejandro Colomar <alx.manpages@xxxxxxxxx> --- v2: - Reword license to adequate it for many functions instead of a single program. - Add a trailing ';' for consistency. v3: - Resend to avoid confusion: I forgot to use [PATCH v2]! v4: - grep_glibc_prototype(): Fix some corner cases where a function invocation was printed. v5: - grep_glibc_prototype(): Fix some corner cases where a function prototype with many attributes wasn't printed. v6: - man_lsfunc(): Allow listing more than one dir. Example: $ man_lsfunc man[23]; --- scripts/bash_aliases | 171 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 171 insertions(+) create mode 100644 scripts/bash_aliases diff --git a/scripts/bash_aliases b/scripts/bash_aliases new file mode 100644 index 000000000..c88ef9b36 --- /dev/null +++ b/scripts/bash_aliases @@ -0,0 +1,171 @@ +# SPDX-License-Identifier: GPL-2.0-only +######################################################################## +# +# (C) Copyright 2021, Alejandro Colomar +# These functions are free software; you can redistribute them and/or +# modify them under the terms of the GNU General Public License +# as published by the Free Software Foundation; version 2. +# +# These functions are distributed in the hope that they will be useful, +# but WITHOUT ANY WARRANTY; without even the implied warranty of +# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +# GNU General Public License for more details +# (http://www.gnu.org/licenses/gpl-2.0.html). +# +######################################################################## + +######################################################################## +# Exit status + +EX_OK=0; +EX_USAGE=64; + +######################################################################## +# Linux kernel + +# grep_syscall() finds the prototype of a syscall in the kernel sources, +# printing the filename, line number, and the prototype. +# It should be run from the root of the linux kernel source tree. +# Usage example: .../linux$ grep_syscall openat2; + +function grep_syscall() +{ + if ! [ -v 1 ]; then + >&2 echo "Usage: ${FUNCNAME[0]} <syscall>"; + return ${EX_USAGE}; + fi + + find * -type f \ + |grep '\.c$' \ + |sort -V \ + |xargs pcregrep -Mn "(?s)^\w*SYSCALL_DEFINE.\(${1},.*?\)" \ + |sed -E 's/^[^:]+:[0-9]+:/&\n/'; + + find * -type f \ + |grep '\.[ch]$' \ + |sort -V \ + |xargs pcregrep -Mn "(?s)^asmlinkage\s+[\w\s]+\**sys_${1}\s*\(.*?\)" \ + |sed -E 's/^[^:]+:[0-9]+:/&\n/'; +} + +# grep_syscall_def() finds the definition of a syscall in the kernel sources, +# printing the filename, line number, and the function definition. +# It should be run from the root of the linux kernel source tree. +# Usage example: .../linux$ grep_syscall_def openat2; + +function grep_syscall_def() +{ + if ! [ -v 1 ]; then + >&2 echo "Usage: ${FUNCNAME[0]} <syscall>"; + return ${EX_USAGE}; + fi + + find * -type f \ + |grep '\.c$' \ + |sort -V \ + |xargs pcregrep -Mn "(?s)^\w*SYSCALL_DEFINE.\(${1},.*?^}" \ + |sed -E 's/^[^:]+:[0-9]+:/&\n/'; +} + +######################################################################## +# Linux man-pages + +# man_section() prints a specific manual page section (DESCRIPTION, SYNOPSIS, +# ...) of all manual pages in a directory (or in a single manual page file). +# Usage example: .../man-pages$ man_section man2 SYNOPSIS; + +function man_section() +{ + if ! [ -v 2 ]; then + >&2 echo "Usage: ${FUNCNAME[0]} <dir> <section>"; + return ${EX_USAGE}; + fi + + find "${1}" -type f \ + |xargs grep -l "\.SH ${2}" \ + |sort -V \ + |while read -r manpage; do + <${manpage} \ + sed -n \ + -e '/^\.TH/,/^\.SH/{/^\.SH/!p}' \ + -e "/^\.SH ${2}/p" \ + -e "/^\.SH ${2}/,/^\.SH/{/^\.SH/!p}" \ + |man -P cat -l - 2>/dev/null; + done; +} + +# man_lsfunc() prints the name of all C functions declared in the SYNOPSIS +# of all manual pages in a directory (or in a single manual page file). +# Each name is printed in a separate line +# Usage example: .../man-pages$ man_lsfunc man2; + +function man_lsfunc() +{ + if ! [ -v 1 ]; then + >&2 echo "Usage: ${FUNCNAME[0]} <dir>"; + return ${EX_USAGE}; + fi + + find "${@}" -type f \ + |xargs grep -l "\.SH SYNOPSIS" \ + |sort -V \ + |while read -r manpage; do + <${manpage} \ + sed -n \ + -e '/^\.TH/,/^\.SH/{/^\.SH/!p}' \ + -e "/^\.SH SYNOPSIS/p" \ + -e "/^\.SH SYNOPSIS/,/^\.SH/{/^\.SH/!p}" \ + |sed \ + -e '/Feature/,$d' \ + -e '/{/,/}/d' \ + |man -P cat -l - 2>/dev/null; + done \ + |sed -n "/^SYNOPSIS/,/^\w/p" \ + |grep '^ \w' \ + |grep -v ':' \ + |sed 's/^[^(]* \**\(\w*\)(.*/\1/' \ + |grep '^\w' \ + |uniq; +} + +# pdfman() reanders a manual page in PDF +# Usage example: .../man-pages$ pdfman man2/membarrier.2; + +function pdfman() +{ + if ! [ -v 1 ]; then + >&2 echo "Usage: ${FUNCNAME[0]} <man-page.n>"; + return ${EX_USAGE}; + fi; + + local tmp="$(mktemp -t "${1##*/}.XXXXXX")"; + + <${1} \ + man -Tps -l - \ + |ps2pdf - - \ + >${tmp}; + xdg-open ${tmp}; +} + +######################################################################## +# Glibc + +# grep_glibc_prototype() finds a function prototype in the glibc sources, +# printing the filename, line number, and the prototype. +# It should be run from the root of the glibc source tree. +# Usage example: .../glibc$ grep_glibc_prototype printf; + +function grep_glibc_prototype() +{ + if ! [ -v 1 ]; then + >&2 echo "Usage: ${FUNCNAME[0]} <func>"; + return ${EX_USAGE}; + fi + + find * -type f \ + |grep '\.h$' \ + |sort -V \ + |xargs pcregrep -Mn \ + "(?s)^[^\s#][\w\s]+\s+\**${1}\s*\([\w\s()[\]*,]+?(...)?\)[\w\s(),]*;" \ + |sed -E 's/^[^:]+:[0-9]+:/&\n/'; +} -- 2.30.1.721.g45526154a5
