3778898f97
BusyBox has support for embedded shell scripts. Two types can be distinguished: custom scripts and scripts implementing applets. Custom scripts should be placed in the 'embed' directory at build time. They are given a default applet configuration and appear as applets to the user but no further configuration is possible. Applet scripts are integrated with the BusyBox build system and are intended to be used to ship standard applets that just happen to be implemented as scripts. They can be configured at build time and appear just like native applets. Such scripts should be placed in the 'applets_sh' directory. A stub C program should be written to provide the usual applet configuration details and placed in a suitable subsystem directory. It may be helpful to have a configuration option to enable any dependencies the script requires: see the 'nologin' applet for an example. function old new delta scripted_main - 41 +41 applet_names 2773 2781 +8 applet_main 1600 1604 +4 i2cdetect_main 672 674 +2 applet_suid 100 101 +1 applet_install_loc 200 201 +1 applet_flags 100 101 +1 packed_usage 33180 33179 -1 tryexec 159 152 -7 evalcommand 1661 1653 -8 script_names 9 - -9 packed_scripts 123 114 -9 complete_cmd_dir_file 826 811 -15 shellexec 271 254 -17 find_command 1007 990 -17 busybox_main 642 624 -18 run_applet_and_exit 100 78 -22 find_script_by_name 51 - -51 ------------------------------------------------------------------------------ (add/remove: 1/2 grow/shrink: 6/9 up/down: 58/-174) Total: -116 bytes text data bss dec hex filename 950034 477 7296 957807 e9d6f busybox_old 949918 477 7296 957691 e9cfb busybox_unstripped Signed-off-by: Ron Yorston <rmy@pobox.com> Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
124 lines
2.9 KiB
Bash
Executable File
124 lines
2.9 KiB
Bash
Executable File
#!/bin/sh
|
|
|
|
# Note: was using sed OPTS CMD -- FILES
|
|
# but users complain that many sed implementations
|
|
# are misinterpreting --.
|
|
|
|
test $# -ge 2 || { echo "Syntax: $0 SRCTREE OBJTREE"; exit 1; }
|
|
|
|
# cd to objtree
|
|
cd -- "$2" || { echo "Syntax: $0 SRCTREE OBJTREE"; exit 1; }
|
|
# In separate objtree build, include/ might not exist yet
|
|
mkdir include 2>/dev/null
|
|
|
|
srctree="$1"
|
|
|
|
status() { printf ' %-8s%s\n' "$1" "$2"; }
|
|
gen() { status "GEN" "$@"; }
|
|
chk() { status "CHK" "$@"; }
|
|
|
|
# scripts in the 'embed' directory are treated as fake applets
|
|
custom_scripts()
|
|
{
|
|
custom_loc="$1"
|
|
if [ -d "$custom_loc" ]
|
|
then
|
|
for i in $(cd "$custom_loc"; ls *)
|
|
do
|
|
printf "APPLET_SCRIPTED(%s, scripted, BB_DIR_USR_BIN, BB_SUID_DROP, dummy)\n" $i;
|
|
done
|
|
fi
|
|
}
|
|
|
|
generate()
|
|
{
|
|
# NB: data to be inserted at INSERT line is coming on stdin
|
|
src="$1"
|
|
dst="$2"
|
|
header="$3"
|
|
loc="$4"
|
|
#chk "${dst}"
|
|
{
|
|
# Need to use printf: different shells have inconsistent
|
|
# rules re handling of "\n" in echo params.
|
|
printf "%s\n" "${header}"
|
|
# print everything up to INSERT line
|
|
sed -n '/^INSERT$/ q; p' "${src}"
|
|
# copy stdin to stdout
|
|
cat
|
|
if [ -n "$loc" ]
|
|
then
|
|
custom_scripts "$loc"
|
|
fi
|
|
# print everything after INSERT line
|
|
sed -n '/^INSERT$/ {
|
|
:l
|
|
n
|
|
p
|
|
bl
|
|
}' "${src}"
|
|
} >"${dst}.tmp"
|
|
if ! cmp -s "${dst}" "${dst}.tmp"; then
|
|
gen "${dst}"
|
|
mv "${dst}.tmp" "${dst}"
|
|
else
|
|
rm -f "${dst}.tmp"
|
|
fi
|
|
}
|
|
|
|
# (Re)generate include/applets.h
|
|
sed -n 's@^//applet:@@p' "$srctree"/*/*.c "$srctree"/*/*/*.c \
|
|
| generate \
|
|
"$srctree/include/applets.src.h" \
|
|
"include/applets.h" \
|
|
"/* DO NOT EDIT. This file is generated from applets.src.h */" \
|
|
"$srctree/embed"
|
|
|
|
# (Re)generate include/usage.h
|
|
# We add line continuation backslash after each line,
|
|
# and insert empty line before each line which doesn't start
|
|
# with space or tab
|
|
TAB="$(printf '\tX')"
|
|
TAB="${TAB%X}"
|
|
LF="$(printf '\nX')"
|
|
LF="${LF%X}"
|
|
sed -n -e 's@^//usage:\([ '"$TAB"'].*\)$@\1 \\@p' \
|
|
-e 's@^//usage:\([^ '"$TAB"'].*\)$@\'"$LF"'\1 \\@p' \
|
|
"$srctree"/*/*.c "$srctree"/*/*/*.c \
|
|
| generate \
|
|
"$srctree/include/usage.src.h" \
|
|
"include/usage.h" \
|
|
"/* DO NOT EDIT. This file is generated from usage.src.h */"
|
|
|
|
# (Re)generate */Kbuild and */Config.in
|
|
# We skip .dotdirs - makes git/svn/etc users happier
|
|
{ cd -- "$srctree" && find . -type d ! '(' -name '.?*' -prune ')'; } \
|
|
| while read -r d; do
|
|
d="${d#./}"
|
|
|
|
src="$srctree/$d/Kbuild.src"
|
|
dst="$d/Kbuild"
|
|
if test -f "$src"; then
|
|
mkdir -p -- "$d" 2>/dev/null
|
|
|
|
sed -n 's@^//kbuild:@@p' "$srctree/$d"/*.c \
|
|
| generate \
|
|
"${src}" "${dst}" \
|
|
"# DO NOT EDIT. This file is generated from Kbuild.src"
|
|
fi
|
|
|
|
src="$srctree/$d/Config.src"
|
|
dst="$d/Config.in"
|
|
if test -f "$src"; then
|
|
mkdir -p -- "$d" 2>/dev/null
|
|
|
|
sed -n 's@^//config:@@p' "$srctree/$d"/*.c \
|
|
| generate \
|
|
"${src}" "${dst}" \
|
|
"# DO NOT EDIT. This file is generated from Config.src"
|
|
fi
|
|
done
|
|
|
|
# Last read failed. This is normal. Don't exit with its error code:
|
|
exit 0
|