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comparison sources/utility_functions.sh @ 1624:c654511d227c

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Move environment variable whitelisting functions to new variables.sh.
author Rob Landley <rob@landley.net>
date Sat, 24 Aug 2013 06:38:10 -0500
parents 84bd3248fad8
children 191dfad915ba
comparison
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1623:6cef85eefede 1624:c654511d227c
1 #!/bin/echo "This file is sourced, not run" 1 #!/bin/echo "This file is sourced, not run"
2 2
3 # This file contains generic functions, presumably reusable in other contexts. 3 # This file contains generic functions, presumably reusable in other contexts.
4
5 # Unset all environment variables that we don't know about, in case some crazy
6 # person already exported $CROSS_COMPILE, $ARCH, $CDPATH, or who knows what
7 # else. It's hard to know what might drive some package crazy, so use a
8 # whitelist.
9
10 sanitize_environment()
11 {
12 # Which variables are set in config?
13
14 TEMP=$(echo $(sed -n 's/.*export[ \t]*\([^=]*\)=.*/\1/p' config) | sed 's/ /,/g')
15
16 # What other variables should we keep?
17
18 TEMP="$TEMP,LANG,PATH,SHELL,TERM,USER,USERNAME,LOGNAME,PWD,EDITOR,HOME,DISPLAY,_"
19 TEMP="$TEMP,TOPSHELL,START_TIME,STAGE_NAME,TOOLCHAIN_PREFIX,HOST_ARCH,WRAPPY_LOGPATH,OLDPATH"
20 TEMP="$TEMP,http_proxy,ftp_proxy,https_proxy,no_proxy,TEMP,TMPDIR,FORK"
21
22 # Unset any variable we don't recognize. It can screw up the build.
23
24 for i in $(env | sed -n 's/=.*//p')
25 do
26 is_in_list $i "$TEMP" && continue
27 [ "${i:0:7}" == "DISTCC_" ] && continue
28 [ "${i:0:7}" == "CCACHE_" ] && continue
29
30 unset $i 2>/dev/null
31 done
32 }
33
34 # Assign (export) a variable only if current value is blank
35
36 export_if_blank()
37 {
38 [ -z "$(eval "echo \"\${${1/=*/}}\"")" ] && export "$1"
39 }
40 4
41 # Create a blank directory at first argument, deleting existing contents if any 5 # Create a blank directory at first argument, deleting existing contents if any
42 6
43 blank_tempdir() 7 blank_tempdir()
44 { 8 {