mkerrors.sh (6068B)
1 #!/usr/bin/env bash 2 # Copyright 2009 The Go Authors. All rights reserved. 3 # Use of this source code is governed by a BSD-style 4 # license that can be found in the LICENSE file. 5 6 # Generate Go code listing errors and other #defined constant 7 # values (ENAMETOOLONG etc.), by asking the preprocessor 8 # about the definitions. 9 10 unset LANG 11 export LC_ALL=C 12 export LC_CTYPE=C 13 14 CC=${CC:-gcc} 15 16 uname=$(uname) 17 18 includes=' 19 #include <sys/types.h> 20 #include <sys/file.h> 21 #include <fcntl.h> 22 #include <dirent.h> 23 #include <sys/socket.h> 24 #include <netinet/in.h> 25 #include <netinet/ip.h> 26 #include <netinet/ip6.h> 27 #include <netinet/tcp.h> 28 #include <errno.h> 29 #include <sys/signal.h> 30 #include <signal.h> 31 #include <sys/resource.h> 32 ' 33 34 ccflags="$@" 35 36 # Write go tool cgo -godefs input. 37 ( 38 echo package plan9 39 echo 40 echo '/*' 41 indirect="includes_$(uname)" 42 echo "${!indirect} $includes" 43 echo '*/' 44 echo 'import "C"' 45 echo 46 echo 'const (' 47 48 # The gcc command line prints all the #defines 49 # it encounters while processing the input 50 echo "${!indirect} $includes" | $CC -x c - -E -dM $ccflags | 51 awk ' 52 $1 != "#define" || $2 ~ /\(/ || $3 == "" {next} 53 54 $2 ~ /^E([ABCD]X|[BIS]P|[SD]I|S|FL)$/ {next} # 386 registers 55 $2 ~ /^(SIGEV_|SIGSTKSZ|SIGRT(MIN|MAX))/ {next} 56 $2 ~ /^(SCM_SRCRT)$/ {next} 57 $2 ~ /^(MAP_FAILED)$/ {next} 58 59 $2 !~ /^ETH_/ && 60 $2 !~ /^EPROC_/ && 61 $2 !~ /^EQUIV_/ && 62 $2 !~ /^EXPR_/ && 63 $2 ~ /^E[A-Z0-9_]+$/ || 64 $2 ~ /^B[0-9_]+$/ || 65 $2 ~ /^V[A-Z0-9]+$/ || 66 $2 ~ /^CS[A-Z0-9]/ || 67 $2 ~ /^I(SIG|CANON|CRNL|EXTEN|MAXBEL|STRIP|UTF8)$/ || 68 $2 ~ /^IGN/ || 69 $2 ~ /^IX(ON|ANY|OFF)$/ || 70 $2 ~ /^IN(LCR|PCK)$/ || 71 $2 ~ /(^FLU?SH)|(FLU?SH$)/ || 72 $2 ~ /^C(LOCAL|READ)$/ || 73 $2 == "BRKINT" || 74 $2 == "HUPCL" || 75 $2 == "PENDIN" || 76 $2 == "TOSTOP" || 77 $2 ~ /^PAR/ || 78 $2 ~ /^SIG[^_]/ || 79 $2 ~ /^O[CNPFP][A-Z]+[^_][A-Z]+$/ || 80 $2 ~ /^IN_/ || 81 $2 ~ /^LOCK_(SH|EX|NB|UN)$/ || 82 $2 ~ /^(AF|SOCK|SO|SOL|IPPROTO|IP|IPV6|ICMP6|TCP|EVFILT|NOTE|EV|SHUT|PROT|MAP|PACKET|MSG|SCM|MCL|DT|MADV|PR)_/ || 83 $2 == "ICMPV6_FILTER" || 84 $2 == "SOMAXCONN" || 85 $2 == "NAME_MAX" || 86 $2 == "IFNAMSIZ" || 87 $2 ~ /^CTL_(MAXNAME|NET|QUERY)$/ || 88 $2 ~ /^SYSCTL_VERS/ || 89 $2 ~ /^(MS|MNT)_/ || 90 $2 ~ /^TUN(SET|GET|ATTACH|DETACH)/ || 91 $2 ~ /^(O|F|FD|NAME|S|PTRACE|PT)_/ || 92 $2 ~ /^LINUX_REBOOT_CMD_/ || 93 $2 ~ /^LINUX_REBOOT_MAGIC[12]$/ || 94 $2 !~ "NLA_TYPE_MASK" && 95 $2 ~ /^(NETLINK|NLM|NLMSG|NLA|IFA|IFAN|RT|RTCF|RTN|RTPROT|RTNH|ARPHRD|ETH_P)_/ || 96 $2 ~ /^SIOC/ || 97 $2 ~ /^TIOC/ || 98 $2 !~ "RTF_BITS" && 99 $2 ~ /^(IFF|IFT|NET_RT|RTM|RTF|RTV|RTA|RTAX)_/ || 100 $2 ~ /^BIOC/ || 101 $2 ~ /^RUSAGE_(SELF|CHILDREN|THREAD)/ || 102 $2 ~ /^RLIMIT_(AS|CORE|CPU|DATA|FSIZE|NOFILE|STACK)|RLIM_INFINITY/ || 103 $2 ~ /^PRIO_(PROCESS|PGRP|USER)/ || 104 $2 ~ /^CLONE_[A-Z_]+/ || 105 $2 !~ /^(BPF_TIMEVAL)$/ && 106 $2 ~ /^(BPF|DLT)_/ || 107 $2 !~ "WMESGLEN" && 108 $2 ~ /^W[A-Z0-9]+$/ {printf("\t%s = C.%s\n", $2, $2)} 109 $2 ~ /^__WCOREFLAG$/ {next} 110 $2 ~ /^__W[A-Z0-9]+$/ {printf("\t%s = C.%s\n", substr($2,3), $2)} 111 112 {next} 113 ' | sort 114 115 echo ')' 116 ) >_const.go 117 118 # Pull out the error names for later. 119 errors=$( 120 echo '#include <errno.h>' | $CC -x c - -E -dM $ccflags | 121 awk '$1=="#define" && $2 ~ /^E[A-Z0-9_]+$/ { print $2 }' | 122 sort 123 ) 124 125 # Pull out the signal names for later. 126 signals=$( 127 echo '#include <signal.h>' | $CC -x c - -E -dM $ccflags | 128 awk '$1=="#define" && $2 ~ /^SIG[A-Z0-9]+$/ { print $2 }' | 129 grep -v 'SIGSTKSIZE\|SIGSTKSZ\|SIGRT' | 130 sort 131 ) 132 133 # Again, writing regexps to a file. 134 echo '#include <errno.h>' | $CC -x c - -E -dM $ccflags | 135 awk '$1=="#define" && $2 ~ /^E[A-Z0-9_]+$/ { print "^\t" $2 "[ \t]*=" }' | 136 sort >_error.grep 137 echo '#include <signal.h>' | $CC -x c - -E -dM $ccflags | 138 awk '$1=="#define" && $2 ~ /^SIG[A-Z0-9]+$/ { print "^\t" $2 "[ \t]*=" }' | 139 grep -v 'SIGSTKSIZE\|SIGSTKSZ\|SIGRT' | 140 sort >_signal.grep 141 142 echo '// mkerrors.sh' "$@" 143 echo '// Code generated by the command above; DO NOT EDIT.' 144 echo 145 go tool cgo -godefs -- "$@" _const.go >_error.out 146 cat _error.out | grep -vf _error.grep | grep -vf _signal.grep 147 echo 148 echo '// Errors' 149 echo 'const (' 150 cat _error.out | grep -f _error.grep | sed 's/=\(.*\)/= Errno(\1)/' 151 echo ')' 152 153 echo 154 echo '// Signals' 155 echo 'const (' 156 cat _error.out | grep -f _signal.grep | sed 's/=\(.*\)/= Signal(\1)/' 157 echo ')' 158 159 # Run C program to print error and syscall strings. 160 ( 161 echo -E " 162 #include <stdio.h> 163 #include <stdlib.h> 164 #include <errno.h> 165 #include <ctype.h> 166 #include <string.h> 167 #include <signal.h> 168 169 #define nelem(x) (sizeof(x)/sizeof((x)[0])) 170 171 enum { A = 'A', Z = 'Z', a = 'a', z = 'z' }; // avoid need for single quotes below 172 173 int errors[] = { 174 " 175 for i in $errors 176 do 177 echo -E ' '$i, 178 done 179 180 echo -E " 181 }; 182 183 int signals[] = { 184 " 185 for i in $signals 186 do 187 echo -E ' '$i, 188 done 189 190 # Use -E because on some systems bash builtin interprets \n itself. 191 echo -E ' 192 }; 193 194 static int 195 intcmp(const void *a, const void *b) 196 { 197 return *(int*)a - *(int*)b; 198 } 199 200 int 201 main(void) 202 { 203 int i, j, e; 204 char buf[1024], *p; 205 206 printf("\n\n// Error table\n"); 207 printf("var errors = [...]string {\n"); 208 qsort(errors, nelem(errors), sizeof errors[0], intcmp); 209 for(i=0; i<nelem(errors); i++) { 210 e = errors[i]; 211 if(i > 0 && errors[i-1] == e) 212 continue; 213 strcpy(buf, strerror(e)); 214 // lowercase first letter: Bad -> bad, but STREAM -> STREAM. 215 if(A <= buf[0] && buf[0] <= Z && a <= buf[1] && buf[1] <= z) 216 buf[0] += a - A; 217 printf("\t%d: \"%s\",\n", e, buf); 218 } 219 printf("}\n\n"); 220 221 printf("\n\n// Signal table\n"); 222 printf("var signals = [...]string {\n"); 223 qsort(signals, nelem(signals), sizeof signals[0], intcmp); 224 for(i=0; i<nelem(signals); i++) { 225 e = signals[i]; 226 if(i > 0 && signals[i-1] == e) 227 continue; 228 strcpy(buf, strsignal(e)); 229 // lowercase first letter: Bad -> bad, but STREAM -> STREAM. 230 if(A <= buf[0] && buf[0] <= Z && a <= buf[1] && buf[1] <= z) 231 buf[0] += a - A; 232 // cut trailing : number. 233 p = strrchr(buf, ":"[0]); 234 if(p) 235 *p = '\0'; 236 printf("\t%d: \"%s\",\n", e, buf); 237 } 238 printf("}\n\n"); 239 240 return 0; 241 } 242 243 ' 244 ) >_errors.c 245 246 $CC $ccflags -o _errors _errors.c && $GORUN ./_errors && rm -f _errors.c _errors _const.go _error.grep _signal.grep _error.out