| #!/usr/bin/env bash |
| # Copyright 2009 The Go Authors. All rights reserved. |
| # Use of this source code is governed by a BSD-style |
| # license that can be found in the LICENSE file. |
| |
| # Generate Go code listing errors and other #defined constant |
| # values (ENAMETOOLONG etc.), by asking the preprocessor |
| # about the definitions. |
| |
| unset LANG |
| export LC_ALL=C |
| export LC_CTYPE=C |
| |
| CC=${CC:-gcc} |
| |
| uname=$(uname) |
| |
| includes=' |
| #include <sys/types.h> |
| #include <sys/file.h> |
| #include <fcntl.h> |
| #include <dirent.h> |
| #include <sys/socket.h> |
| #include <netinet/in.h> |
| #include <netinet/ip.h> |
| #include <netinet/ip6.h> |
| #include <netinet/tcp.h> |
| #include <errno.h> |
| #include <sys/signal.h> |
| #include <signal.h> |
| #include <sys/resource.h> |
| ' |
| |
| ccflags="$@" |
| |
| # Write go tool cgo -godefs input. |
| ( |
| echo package plan9 |
| echo |
| echo '/*' |
| indirect="includes_$(uname)" |
| echo "${!indirect} $includes" |
| echo '*/' |
| echo 'import "C"' |
| echo |
| echo 'const (' |
| |
| # The gcc command line prints all the #defines |
| # it encounters while processing the input |
| echo "${!indirect} $includes" | $CC -x c - -E -dM $ccflags | |
| awk ' |
| $1 != "#define" || $2 ~ /\(/ || $3 == "" {next} |
| |
| $2 ~ /^E([ABCD]X|[BIS]P|[SD]I|S|FL)$/ {next} # 386 registers |
| $2 ~ /^(SIGEV_|SIGSTKSZ|SIGRT(MIN|MAX))/ {next} |
| $2 ~ /^(SCM_SRCRT)$/ {next} |
| $2 ~ /^(MAP_FAILED)$/ {next} |
| |
| $2 !~ /^ETH_/ && |
| $2 !~ /^EPROC_/ && |
| $2 !~ /^EQUIV_/ && |
| $2 !~ /^EXPR_/ && |
| $2 ~ /^E[A-Z0-9_]+$/ || |
| $2 ~ /^B[0-9_]+$/ || |
| $2 ~ /^V[A-Z0-9]+$/ || |
| $2 ~ /^CS[A-Z0-9]/ || |
| $2 ~ /^I(SIG|CANON|CRNL|EXTEN|MAXBEL|STRIP|UTF8)$/ || |
| $2 ~ /^IGN/ || |
| $2 ~ /^IX(ON|ANY|OFF)$/ || |
| $2 ~ /^IN(LCR|PCK)$/ || |
| $2 ~ /(^FLU?SH)|(FLU?SH$)/ || |
| $2 ~ /^C(LOCAL|READ)$/ || |
| $2 == "BRKINT" || |
| $2 == "HUPCL" || |
| $2 == "PENDIN" || |
| $2 == "TOSTOP" || |
| $2 ~ /^PAR/ || |
| $2 ~ /^SIG[^_]/ || |
| $2 ~ /^O[CNPFP][A-Z]+[^_][A-Z]+$/ || |
| $2 ~ /^IN_/ || |
| $2 ~ /^LOCK_(SH|EX|NB|UN)$/ || |
| $2 ~ /^(AF|SOCK|SO|SOL|IPPROTO|IP|IPV6|ICMP6|TCP|EVFILT|NOTE|EV|SHUT|PROT|MAP|PACKET|MSG|SCM|MCL|DT|MADV|PR)_/ || |
| $2 == "ICMPV6_FILTER" || |
| $2 == "SOMAXCONN" || |
| $2 == "NAME_MAX" || |
| $2 == "IFNAMSIZ" || |
| $2 ~ /^CTL_(MAXNAME|NET|QUERY)$/ || |
| $2 ~ /^SYSCTL_VERS/ || |
| $2 ~ /^(MS|MNT)_/ || |
| $2 ~ /^TUN(SET|GET|ATTACH|DETACH)/ || |
| $2 ~ /^(O|F|FD|NAME|S|PTRACE|PT)_/ || |
| $2 ~ /^LINUX_REBOOT_CMD_/ || |
| $2 ~ /^LINUX_REBOOT_MAGIC[12]$/ || |
| $2 !~ "NLA_TYPE_MASK" && |
| $2 ~ /^(NETLINK|NLM|NLMSG|NLA|IFA|IFAN|RT|RTCF|RTN|RTPROT|RTNH|ARPHRD|ETH_P)_/ || |
| $2 ~ /^SIOC/ || |
| $2 ~ /^TIOC/ || |
| $2 !~ "RTF_BITS" && |
| $2 ~ /^(IFF|IFT|NET_RT|RTM|RTF|RTV|RTA|RTAX)_/ || |
| $2 ~ /^BIOC/ || |
| $2 ~ /^RUSAGE_(SELF|CHILDREN|THREAD)/ || |
| $2 ~ /^RLIMIT_(AS|CORE|CPU|DATA|FSIZE|NOFILE|STACK)|RLIM_INFINITY/ || |
| $2 ~ /^PRIO_(PROCESS|PGRP|USER)/ || |
| $2 ~ /^CLONE_[A-Z_]+/ || |
| $2 !~ /^(BPF_TIMEVAL)$/ && |
| $2 ~ /^(BPF|DLT)_/ || |
| $2 !~ "WMESGLEN" && |
| $2 ~ /^W[A-Z0-9]+$/ {printf("\t%s = C.%s\n", $2, $2)} |
| $2 ~ /^__WCOREFLAG$/ {next} |
| $2 ~ /^__W[A-Z0-9]+$/ {printf("\t%s = C.%s\n", substr($2,3), $2)} |
| |
| {next} |
| ' | sort |
| |
| echo ')' |
| ) >_const.go |
| |
| # Pull out the error names for later. |
| errors=$( |
| echo '#include <errno.h>' | $CC -x c - -E -dM $ccflags | |
| awk '$1=="#define" && $2 ~ /^E[A-Z0-9_]+$/ { print $2 }' | |
| sort |
| ) |
| |
| # Pull out the signal names for later. |
| signals=$( |
| echo '#include <signal.h>' | $CC -x c - -E -dM $ccflags | |
| awk '$1=="#define" && $2 ~ /^SIG[A-Z0-9]+$/ { print $2 }' | |
| grep -v 'SIGSTKSIZE\|SIGSTKSZ\|SIGRT' | |
| sort |
| ) |
| |
| # Again, writing regexps to a file. |
| echo '#include <errno.h>' | $CC -x c - -E -dM $ccflags | |
| awk '$1=="#define" && $2 ~ /^E[A-Z0-9_]+$/ { print "^\t" $2 "[ \t]*=" }' | |
| sort >_error.grep |
| echo '#include <signal.h>' | $CC -x c - -E -dM $ccflags | |
| awk '$1=="#define" && $2 ~ /^SIG[A-Z0-9]+$/ { print "^\t" $2 "[ \t]*=" }' | |
| grep -v 'SIGSTKSIZE\|SIGSTKSZ\|SIGRT' | |
| sort >_signal.grep |
| |
| echo '// mkerrors.sh' "$@" |
| echo '// Code generated by the command above; DO NOT EDIT.' |
| echo |
| go tool cgo -godefs -- "$@" _const.go >_error.out |
| cat _error.out | grep -vf _error.grep | grep -vf _signal.grep |
| echo |
| echo '// Errors' |
| echo 'const (' |
| cat _error.out | grep -f _error.grep | sed 's/=\(.*\)/= Errno(\1)/' |
| echo ')' |
| |
| echo |
| echo '// Signals' |
| echo 'const (' |
| cat _error.out | grep -f _signal.grep | sed 's/=\(.*\)/= Signal(\1)/' |
| echo ')' |
| |
| # Run C program to print error and syscall strings. |
| ( |
| echo -E " |
| #include <stdio.h> |
| #include <stdlib.h> |
| #include <errno.h> |
| #include <ctype.h> |
| #include <string.h> |
| #include <signal.h> |
| |
| #define nelem(x) (sizeof(x)/sizeof((x)[0])) |
| |
| enum { A = 'A', Z = 'Z', a = 'a', z = 'z' }; // avoid need for single quotes below |
| |
| int errors[] = { |
| " |
| for i in $errors |
| do |
| echo -E ' '$i, |
| done |
| |
| echo -E " |
| }; |
| |
| int signals[] = { |
| " |
| for i in $signals |
| do |
| echo -E ' '$i, |
| done |
| |
| # Use -E because on some systems bash builtin interprets \n itself. |
| echo -E ' |
| }; |
| |
| static int |
| intcmp(const void *a, const void *b) |
| { |
| return *(int*)a - *(int*)b; |
| } |
| |
| int |
| main(void) |
| { |
| int i, j, e; |
| char buf[1024], *p; |
| |
| printf("\n\n// Error table\n"); |
| printf("var errors = [...]string {\n"); |
| qsort(errors, nelem(errors), sizeof errors[0], intcmp); |
| for(i=0; i<nelem(errors); i++) { |
| e = errors[i]; |
| if(i > 0 && errors[i-1] == e) |
| continue; |
| strcpy(buf, strerror(e)); |
| // lowercase first letter: Bad -> bad, but STREAM -> STREAM. |
| if(A <= buf[0] && buf[0] <= Z && a <= buf[1] && buf[1] <= z) |
| buf[0] += a - A; |
| printf("\t%d: \"%s\",\n", e, buf); |
| } |
| printf("}\n\n"); |
| |
| printf("\n\n// Signal table\n"); |
| printf("var signals = [...]string {\n"); |
| qsort(signals, nelem(signals), sizeof signals[0], intcmp); |
| for(i=0; i<nelem(signals); i++) { |
| e = signals[i]; |
| if(i > 0 && signals[i-1] == e) |
| continue; |
| strcpy(buf, strsignal(e)); |
| // lowercase first letter: Bad -> bad, but STREAM -> STREAM. |
| if(A <= buf[0] && buf[0] <= Z && a <= buf[1] && buf[1] <= z) |
| buf[0] += a - A; |
| // cut trailing : number. |
| p = strrchr(buf, ":"[0]); |
| if(p) |
| *p = '\0'; |
| printf("\t%d: \"%s\",\n", e, buf); |
| } |
| printf("}\n\n"); |
| |
| return 0; |
| } |
| |
| ' |
| ) >_errors.c |
| |
| $CC $ccflags -o _errors _errors.c && $GORUN ./_errors && rm -f _errors.c _errors _const.go _error.grep _signal.grep _error.out |