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annotate scripts/genconfig.sh @ 1128:9eaec92e3713 draft

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Ifconfig cleanup.
author Rob Landley <rob@landley.net>
date Tue, 26 Nov 2013 19:35:22 -0600
parents a612857eb52d
children 565980862743
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d4176f3f3835 Zap toys/Config.in and instead create generated/Config.in from contents of
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1 #!/bin/bash
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2
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3 # This has to be a separate file from scripts/make.sh so it can be called
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4 # before menuconfig. (It's called again from scripts/make.sh just to be sure.)
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5
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6 mkdir -p generated
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7
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8 source configure
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9
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10 probeconfig()
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11 {
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12 # Probe for container support on target
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13
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14 echo -e "# container support\nconfig TOYBOX_CONTAINER\n\tbool" || return 1
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15 ${CROSS_COMPILE}${CC} $CFLAGS -xc -o /dev/null - 2>/dev/null << EOF
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16 #include <linux/sched.h>
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17 int x=CLONE_NEWNS|CLONE_NEWUTS|CLONE_NEWIPC|CLONE_NEWNET;
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18
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19 int main(int argc, char *argv[]) { return unshare(x); }
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20 EOF
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21 [ $? -eq 0 ] && DEFAULT=y || DEFAULT=n
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22 rm a.out 2>/dev/null
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23 echo -e "\tdefault $DEFAULT\n" || return 1
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24 }
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25
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26 genconfig()
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27 {
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28 # I could query the directory here, but I want to control the order
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29 # and capitalization in the menu
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30 for j in toys/*/README
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31 do
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32 DIR="$(dirname "$j")"
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33
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34 [ $(ls "$DIR" | wc -l) -lt 2 ] && continue
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35
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36 echo "menu \"$(head -n 1 $j)\""
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37 echo
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38
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39 # extract config stanzas from each source file, in alphabetical order
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40 for i in $(ls -1 $DIR/*.c)
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41 do
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42 # Grab the config block for Config.in
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43 echo "# $i"
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44 sed -n '/^\*\//q;/^config [A-Z]/,$p' $i || return 1
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45 echo
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46 done
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47
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48 echo endmenu
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49 done
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50 }
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51
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52 headerprobes()
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53 {
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54 ${CROSS_COMPILE}${CC} $CFLAGS -xc -o /dev/null - 2>/dev/null << EOF
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55 #include <fcntl.h>
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56 #ifndef O_NOFOLLOW
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57 #error posix 2008 was a while ago now
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58 #endif
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59 EOF
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60 if [ $? -ne 0 ]
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61 then
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62 rm -f a.out
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63 ${CROSS_COMPILE}${CC} $CFLAGS -xc - 2>/dev/null << EOF
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64 #include <stdio.h>
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65 #include <sys/types.h>
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66 #include <asm/fcntl.h>
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67
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68 int main(int argc, char *argv[])
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69 {
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70 printf("0x%x\n", O_NOFOLLOW);
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71 }
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72 EOF
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73 X=$(./a.out) 2>/dev/null
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74 rm -f a.out
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75 echo "#define O_NOFOLLOW ${X:-0}"
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76 fi
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77 }
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78
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79 probeconfig > generated/Config.probed || rm generated/Config.probed
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80 genconfig > generated/Config.in || rm generated/Config.in
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81 headerprobes > generated/portability.h || rm generated/portability.h