1 ?RCS: $Id: Signal.U 1 2006-08-24 12:32:52Z rmanfredi $
3 ?RCS: Copyright (c) 1991-1997, 2004-2006, Raphael Manfredi
5 ?RCS: You may redistribute only under the terms of the Artistic Licence,
6 ?RCS: as specified in the README file that comes with the distribution.
7 ?RCS: You may reuse parts of this distribution only within the terms of
8 ?RCS: that same Artistic Licence; a copy of which may be found at the root
9 ?RCS: of the source tree for dist 4.0.
11 ?RCS: $Log: Signal.U,v $
12 ?RCS: Revision 3.0.1.1 1997/02/28 15:20:01 ram
13 ?RCS: patch61: created
16 ?X: This unit produces three files:
18 ?X: 1- A signal.c file, which, when compiled and run, produces an output like:
25 ?X: 2- A signal.awk script to parse the output of signal.c, fill
26 ?X: in gaps (up to NSIG) and move duplicates to the end.
28 ?X: 3- A signal_cmd script to compile signal.c and run it
29 ?X: through sort -n -k 2 | uniq | awk -f signal.awk.
30 ?X: (we try also sort -n +1 since some old hosts don't grok sort -k)
31 ?X: (This is called signal_cmd to avoid OS/2 confusion with
32 ?X: signal.cmd vs. signal.
33 ?X: The signal_cmd script also falls back on checking signals one at a
34 ?X: time in case the signal.c program fails. On at least one version of
35 ?X: Linux 2.1.x, the header file #define'd SIGRTMAX to a symbol that
36 ?X: is not defined by the compiler/linker. :-(. Further, on that same
37 ?X: version of Linux, the user had a defective C-shell that gave an
38 ?X: incorrect list for kill -l, so the fall-back didn't work.
40 ?X: This unit is then used by sig_name.U.
42 ?MAKE:Signal: test tr rm awk cat grep startsh eunicefix sed sort uniq \
43 Findhdr cppstdin +cppflags cppminus Compile trnl run
44 ?MAKE: -pick add $@ %<
45 ?X:all files declared as "public" since they're used from other units
46 ?F:signal.c signal_cmd signal.lst signal signal.awk
49 : Trace out the files included by signal.h, then look for SIGxxx names.
50 ?X: Remove SIGARRAYSIZE used by HPUX.
51 ?X: Remove SIGSTKSIZE used by Linux.
52 ?X: Remove SIGSTKSZ used by Posix.
53 ?X: Remove SIGTYP void lines used by OS2.
54 ?X: Some cpps, like os390, dont give the file name anywhere
55 if [ "X$fieldn" = X ]; then
56 : Just make some guesses. We check them later.
57 xxx='/usr/include/signal.h /usr/include/sys/signal.h'
59 xxx=`echo '#include <signal.h>' |
60 $cppstdin $cppminus $cppflags 2>/dev/null |
61 $grep '^[ ]*#.*include' |
62 $awk "{print \\$$fieldn}" | $sed 's!"!!g' |\
63 $sed 's!\\\\\\\\!/!g' | $sort | $uniq`
65 ?X: Check this list of files to be sure we have parsed the cpp output ok.
66 ?X: This will also avoid potentially non-existent files, such
69 ?X: Add /dev/null in case the $xxx list is empty.
70 for xx in $xxx /dev/null ; do
71 $test -f "$xx" && xxxfiles="$xxxfiles $xx"
73 ?X: If we have found no files, at least try signal.h
75 '') xxxfiles=`./findhdr signal.h` ;;
78 $1 ~ /^#define$/ && $2 ~ /^SIG[A-Z0-9]*$/ && $2 !~ /SIGARRAYSIZE/ && $2 !~ /SIGSTKSIZE/ && $2 !~ /SIGSTKSZ/ && $3 !~ /void/ {
79 print substr($2, 4, 20)
81 $1 == "#" && $2 ~ /^define$/ && $3 ~ /^SIG[A-Z0-9]*$/ && $3 !~ /SIGARRAYSIZE/ && $4 !~ /void/ {
82 print substr($3, 4, 20)
84 : Append some common names just in case the awk scan failed.
85 xxx="$xxx ABRT ALRM BUS CANCEL CHLD CLD CONT DIL EMT FPE"
86 xxx="$xxx FREEZE HUP ILL INT IO IOT KILL LOST LWP PHONE"
87 xxx="$xxx PIPE POLL PROF PWR QUIT RTMAX RTMIN SEGV STKFLT STOP"
88 xxx="$xxx SYS TERM THAW TRAP TSTP TTIN TTOU URG USR1 USR2"
89 xxx="$xxx USR3 USR4 VTALRM WAITING WINCH WIND WINDOW XCPU XFSZ"
91 : generate a few handy files for later
92 $cat > signal.c <<'EOCP'
93 #include <sys/types.h>
98 /* Strange style to avoid deeply-nested #if/#else/#endif */
101 # define NSIG (_NSIG)
107 # define NSIG (SIGMAX+1)
113 # define NSIG (SIG_MAX+1)
119 # define NSIG (MAXSIG+1)
125 # define NSIG (MAX_SIG+1)
131 # define NSIG (SIGARRAYSIZE+1) /* Not sure of the +1 */
137 # define NSIG (_sys_nsig) /* Solaris 2.5 */
141 /* Default to some arbitrary number that's big enough to get most
142 of the common signals.
148 printf("NSIG %d\n", NSIG);
154 echo $xxx | $tr ' ' $trnl | $sort | $uniq | $awk '
156 printf "#ifdef SIG"; printf $1; printf "\n"
157 printf "printf(\""; printf $1; printf " %%d\\n\",SIG";
158 printf $1; printf ");\n"
162 printf "#endif /* JUST_NSIG */\n";
163 printf "exit(0);\n}\n";
166 $cat >signal.awk <<'EOP'
168 $1 ~ /^NSIG$/ { nsig = $2 }
169 ($1 !~ /^NSIG$/) && (NF == 2) {
170 if ($2 > maxsig) { maxsig = $2 }
185 printf("NSIG %d\n", nsig);
186 for (n = 1; n < nsig; n++) {
188 printf("%s %d\n", sig_name[n], sig_num[n])
191 printf("NUM%d %d\n", n, n)
194 for (n = 0; n < ndups; n++) {
195 printf("%s %d\n", dup_name[n], dup_num[n])
199 $cat >signal_cmd <<EOS
201 if $test -s signal.lst; then
202 echo "Using your existing signal.lst file"
207 ?X: Avoid variable interpolation problems, especially with
208 ?X: xxx, which contains newlines.
209 $cat >>signal_cmd <<'EOS'
212 if eval $compile_ok; then
213 $run ./signal$_exe | ($sort -n -k 2 2>/dev/null || $sort -n +1) |\
214 $uniq | $awk -f signal.awk >signal.lst
216 echo "(I can't seem be able to compile the whole test program)" >&4
217 echo "(I'll try it in little pieces.)" >&4
218 set signal -DJUST_NSIG
219 if eval $compile_ok; then
220 $run ./signal$_exe > signal.nsg
223 echo "I can't seem to figure out how many signals you have." >&4
224 echo "Guessing 50." >&4
225 echo 'NSIG 50' > signal.nsg
227 : Now look at all the signal names, one at a time.
228 for xx in `echo $xxx | $tr ' ' $trnl | $sort | $uniq`; do
229 $cat > signal.c <<EOCP
230 #include <sys/types.h>
234 printf("$xx %d\n", SIG${xx});
239 if eval $compile; then
240 echo "SIG${xx} found."
241 $run ./signal$_exe >> signal.ls1
243 echo "SIG${xx} NOT found."
246 if $test -s signal.ls1; then
247 $cat signal.nsg signal.ls1 |
248 $sort -n | $uniq | $awk -f signal.awk >signal.lst
252 if $test -s signal.lst; then
255 echo "(AAK! I can't compile the test programs -- Guessing)" >&4
256 echo 'kill -l' >signal
257 set X `csh -f <signal`
261 0) set HUP INT QUIT ILL TRAP ABRT EMT FPE KILL BUS SEGV SYS PIPE ALRM TERM;;
263 echo $@ | $tr ' ' $trnl | \
264 $awk '{ printf "%s %d\n", $1, ++s; }
265 END { printf "NSIG %d\n", ++s }' >signal.lst
267 $rm -f signal.c signal$_exe signal$_o signal.nsg signal.ls1
270 $eunicefix signal_cmd