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Text file src/syscall/mkerrors.sh

Documentation: syscall

     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=${CC:-gcc}
    15	
    16	if [[ "$GOOS" -eq "solaris" ]]; then
    17		# Assumes GNU versions of utilities in PATH.
    18		export PATH=/usr/gnu/bin:$PATH
    19	fi
    20	
    21	uname=$(uname)
    22	
    23	includes_Darwin='
    24	#define _DARWIN_C_SOURCE
    25	#define KERNEL
    26	#define _DARWIN_USE_64_BIT_INODE
    27	#include <sys/types.h>
    28	#include <sys/event.h>
    29	#include <sys/ptrace.h>
    30	#include <sys/socket.h>
    31	#include <sys/sockio.h>
    32	#include <sys/sysctl.h>
    33	#include <sys/mman.h>
    34	#include <sys/wait.h>
    35	#include <net/bpf.h>
    36	#include <net/if.h>
    37	#include <net/if_types.h>
    38	#include <net/route.h>
    39	#include <netinet/in.h>
    40	#include <netinet/ip.h>
    41	#include <netinet/ip_mroute.h>
    42	#include <termios.h>
    43	'
    44	
    45	includes_DragonFly='
    46	#include <sys/types.h>
    47	#include <sys/event.h>
    48	#include <sys/socket.h>
    49	#include <sys/sockio.h>
    50	#include <sys/sysctl.h>
    51	#include <sys/mman.h>
    52	#include <sys/wait.h>
    53	#include <sys/ioctl.h>
    54	#include <net/bpf.h>
    55	#include <net/if.h>
    56	#include <net/if_types.h>
    57	#include <net/route.h>
    58	#include <netinet/in.h>
    59	#include <termios.h>
    60	#include <netinet/ip.h>
    61	#include <net/ip_mroute/ip_mroute.h>
    62	'
    63	
    64	includes_FreeBSD='
    65	#include <sys/param.h>
    66	#include <sys/types.h>
    67	#include <sys/event.h>
    68	#include <sys/socket.h>
    69	#include <sys/sockio.h>
    70	#include <sys/sysctl.h>
    71	#include <sys/mman.h>
    72	#include <sys/wait.h>
    73	#include <sys/ioctl.h>
    74	#include <net/bpf.h>
    75	#include <net/if.h>
    76	#include <net/if_types.h>
    77	#include <net/route.h>
    78	#include <netinet/in.h>
    79	#include <termios.h>
    80	#include <netinet/ip.h>
    81	#include <netinet/ip_mroute.h>
    82	
    83	#if __FreeBSD__ >= 10
    84	#define IFT_CARP	0xf8	// IFT_CARP is deprecated in FreeBSD 10
    85	#undef SIOCAIFADDR
    86	#define SIOCAIFADDR	_IOW(105, 26, struct oifaliasreq)	// ifaliasreq contains if_data
    87	#undef SIOCSIFPHYADDR
    88	#define SIOCSIFPHYADDR	_IOW(105, 70, struct oifaliasreq)	// ifaliasreq contains if_data
    89	#endif
    90	'
    91	
    92	includes_Linux='
    93	#define _LARGEFILE_SOURCE
    94	#define _LARGEFILE64_SOURCE
    95	#ifndef __LP64__
    96	#define _FILE_OFFSET_BITS 64
    97	#endif
    98	#define _GNU_SOURCE
    99	
   100	#include <bits/sockaddr.h>
   101	#include <sys/epoll.h>
   102	#include <sys/inotify.h>
   103	#include <sys/ioctl.h>
   104	#include <sys/mman.h>
   105	#include <sys/mount.h>
   106	#include <sys/prctl.h>
   107	#include <sys/stat.h>
   108	#include <sys/types.h>
   109	#include <sys/time.h>
   110	#include <sys/socket.h>
   111	#include <linux/if.h>
   112	#include <linux/if_arp.h>
   113	#include <linux/if_ether.h>
   114	#include <linux/if_tun.h>
   115	#include <linux/if_packet.h>
   116	#include <linux/if_addr.h>
   117	#include <linux/filter.h>
   118	#include <linux/netlink.h>
   119	#include <linux/reboot.h>
   120	#include <linux/rtnetlink.h>
   121	#include <linux/ptrace.h>
   122	#include <linux/sched.h>
   123	#include <linux/wait.h>
   124	#include <linux/icmpv6.h>
   125	#include <net/route.h>
   126	#include <termios.h>
   127	
   128	#ifndef MSG_FASTOPEN
   129	#define MSG_FASTOPEN    0x20000000
   130	#endif
   131	
   132	#ifndef PTRACE_GETREGS
   133	#define PTRACE_GETREGS	0xc
   134	#endif
   135	
   136	#ifndef PTRACE_SETREGS
   137	#define PTRACE_SETREGS	0xd
   138	#endif
   139	'
   140	
   141	includes_NetBSD='
   142	#include <sys/types.h>
   143	#include <sys/param.h>
   144	#include <sys/event.h>
   145	#include <sys/mman.h>
   146	#include <sys/socket.h>
   147	#include <sys/sockio.h>
   148	#include <sys/sysctl.h>
   149	#include <sys/termios.h>
   150	#include <sys/ttycom.h>
   151	#include <sys/wait.h>
   152	#include <net/bpf.h>
   153	#include <net/if.h>
   154	#include <net/if_types.h>
   155	#include <net/route.h>
   156	#include <netinet/in.h>
   157	#include <netinet/in_systm.h>
   158	#include <netinet/ip.h>
   159	#include <netinet/ip_mroute.h>
   160	#include <netinet/if_ether.h>
   161	
   162	// Needed since <sys/param.h> refers to it...
   163	#define schedppq 1
   164	'
   165	
   166	includes_OpenBSD='
   167	#include <sys/types.h>
   168	#include <sys/param.h>
   169	#include <sys/event.h>
   170	#include <sys/mman.h>
   171	#include <sys/socket.h>
   172	#include <sys/sockio.h>
   173	#include <sys/sysctl.h>
   174	#include <sys/termios.h>
   175	#include <sys/ttycom.h>
   176	#include <sys/wait.h>
   177	#include <net/bpf.h>
   178	#include <net/if.h>
   179	#include <net/if_types.h>
   180	#include <net/if_var.h>
   181	#include <net/route.h>
   182	#include <netinet/in.h>
   183	#include <netinet/in_systm.h>
   184	#include <netinet/ip.h>
   185	#include <netinet/ip_mroute.h>
   186	#include <netinet/if_ether.h>
   187	#include <net/if_bridge.h>
   188	
   189	// We keep some constants not supported in OpenBSD 5.5 and beyond for
   190	// the promise of compatibility.
   191	#define EMUL_ENABLED		0x1
   192	#define EMUL_NATIVE		0x2
   193	#define IPV6_FAITH		0x1d
   194	#define IPV6_OPTIONS		0x1
   195	#define IPV6_RTHDR_STRICT	0x1
   196	#define IPV6_SOCKOPT_RESERVED1	0x3
   197	#define SIOCGIFGENERIC		0xc020693a
   198	#define SIOCSIFGENERIC		0x80206939
   199	#define WALTSIG			0x4
   200	'
   201	
   202	includes_SunOS='
   203	#include <limits.h>
   204	#include <sys/types.h>
   205	#include <sys/socket.h>
   206	#include <sys/sockio.h>
   207	#include <sys/mman.h>
   208	#include <sys/wait.h>
   209	#include <sys/ioctl.h>
   210	#include <net/bpf.h>
   211	#include <net/if.h>
   212	#include <net/if_arp.h>
   213	#include <net/if_types.h>
   214	#include <net/route.h>
   215	#include <netinet/in.h>
   216	#include <termios.h>
   217	#include <netinet/ip.h>
   218	#include <netinet/ip_mroute.h>
   219	'
   220	
   221	includes='
   222	#include <sys/types.h>
   223	#include <sys/file.h>
   224	#include <fcntl.h>
   225	#include <dirent.h>
   226	#include <sys/socket.h>
   227	#include <netinet/in.h>
   228	#include <netinet/ip.h>
   229	#include <netinet/ip6.h>
   230	#include <netinet/tcp.h>
   231	#include <errno.h>
   232	#include <sys/signal.h>
   233	#include <signal.h>
   234	#include <sys/resource.h>
   235	'
   236	
   237	ccflags="$@"
   238	
   239	# Write go tool cgo -godefs input.
   240	(
   241		echo package syscall
   242		echo
   243		echo '/*'
   244		indirect="includes_$(uname)"
   245		echo "${!indirect} $includes"
   246		echo '*/'
   247		echo 'import "C"'
   248		echo
   249		echo 'const ('
   250	
   251		# The gcc command line prints all the #defines
   252		# it encounters while processing the input
   253		echo "${!indirect} $includes" | $CC -x c - -E -dM $ccflags |
   254		awk '
   255			$1 != "#define" || $2 ~ /\(/ || $3 == "" {next}
   256	
   257			$2 ~ /^E([ABCD]X|[BIS]P|[SD]I|S|FL)$/ {next}  # 386 registers
   258			$2 ~ /^(SIGEV_|SIGSTKSZ|SIGRT(MIN|MAX))/ {next}
   259			$2 ~ /^(SCM_SRCRT)$/ {next}
   260			$2 ~ /^(MAP_FAILED)$/ {next}
   261			$2 ~ /^ELF_.*$/ {next}	# <asm/elf.h> contains ELF_ARCH, etc.
   262	
   263			$2 !~ /^ETH_/ &&
   264			$2 !~ /^EPROC_/ &&
   265			$2 !~ /^EQUIV_/ &&
   266			$2 !~ /^EXPR_/ &&
   267			$2 ~ /^E[A-Z0-9_]+$/ ||
   268			$2 ~ /^B[0-9_]+$/ ||
   269			$2 ~ /^V[A-Z0-9]+$/ ||
   270			$2 ~ /^CS[A-Z0-9]/ ||
   271			$2 ~ /^I(SIG|CANON|CRNL|EXTEN|MAXBEL|STRIP|UTF8)$/ ||
   272			$2 ~ /^IGN/ ||
   273			$2 ~ /^IX(ON|ANY|OFF)$/ ||
   274			$2 ~ /^IN(LCR|PCK)$/ ||
   275			$2 ~ /(^FLU?SH)|(FLU?SH$)/ ||
   276			$2 ~ /^C(LOCAL|READ)$/ ||
   277			$2 == "BRKINT" ||
   278			$2 == "HUPCL" ||
   279			$2 == "PENDIN" ||
   280			$2 == "TOSTOP" ||
   281			$2 ~ /^PAR/ ||
   282			$2 ~ /^SIG[^_]/ ||
   283			$2 ~ /^O[CNPFP][A-Z]+[^_][A-Z]+$/ ||
   284			$2 ~ /^IN_/ ||
   285			$2 ~ /^LOCK_(SH|EX|NB|UN)$/ ||
   286			$2 ~ /^(AF|SOCK|SO|SOL|IPPROTO|IP|IPV6|ICMP6|TCP|EVFILT|NOTE|EV|SHUT|PROT|MAP|PACKET|MSG|SCM|MCL|DT|MADV|PR)_/ ||
   287			$2 == "ICMPV6_FILTER" ||
   288			$2 == "SOMAXCONN" ||
   289			$2 == "NAME_MAX" ||
   290			$2 == "IFNAMSIZ" ||
   291			$2 ~ /^CTL_(MAXNAME|NET|QUERY)$/ ||
   292			$2 ~ /^SYSCTL_VERS/ ||
   293			$2 ~ /^(MS|MNT)_/ ||
   294			$2 ~ /^TUN(SET|GET|ATTACH|DETACH)/ ||
   295			$2 ~ /^(O|F|FD|NAME|S|PTRACE|PT)_/ ||
   296			$2 ~ /^LINUX_REBOOT_CMD_/ ||
   297			$2 ~ /^LINUX_REBOOT_MAGIC[12]$/ ||
   298			$2 !~ "NLA_TYPE_MASK" &&
   299			$2 ~ /^(NETLINK|NLM|NLMSG|NLA|IFA|IFAN|RT|RTCF|RTN|RTPROT|RTNH|ARPHRD|ETH_P)_/ ||
   300			$2 ~ /^SIOC/ ||
   301			$2 ~ /^TIOC/ ||
   302			$2 !~ "RTF_BITS" &&
   303			$2 ~ /^(IFF|IFT|NET_RT|RTM|RTF|RTV|RTA|RTAX)_/ ||
   304			$2 ~ /^BIOC/ ||
   305			$2 ~ /^RUSAGE_(SELF|CHILDREN|THREAD)/ ||
   306			$2 ~ /^RLIMIT_(AS|CORE|CPU|DATA|FSIZE|NOFILE|STACK)|RLIM_INFINITY/ ||
   307			$2 ~ /^PRIO_(PROCESS|PGRP|USER)/ ||
   308			$2 ~ /^CLONE_[A-Z_]+/ ||
   309			$2 !~ /^(BPF_TIMEVAL)$/ &&
   310			$2 ~ /^(BPF|DLT)_/ ||
   311			$2 !~ "WMESGLEN" &&
   312			$2 ~ /^W[A-Z0-9]+$/ {printf("\t%s = C.%s\n", $2, $2)}
   313			$2 ~ /^__WCOREFLAG$/ {next}
   314			$2 ~ /^__W[A-Z0-9]+$/ {printf("\t%s = C.%s\n", substr($2,3), $2)}
   315	
   316			{next}
   317		' | sort
   318	
   319		echo ')'
   320	) >_const.go
   321	
   322	# Pull out the error names for later.
   323	errors=$(
   324		echo '#include <errno.h>' | $CC -x c - -E -dM $ccflags |
   325		awk '$1=="#define" && $2 ~ /^E[A-Z0-9_]+$/ { print $2 }' |
   326		sort
   327	)
   328	
   329	# Pull out the signal names for later.
   330	signals=$(
   331		echo '#include <signal.h>' | $CC -x c - -E -dM $ccflags |
   332		awk '$1=="#define" && $2 ~ /^SIG[A-Z0-9]+$/ { print $2 }' |
   333		egrep -v '(SIGSTKSIZE|SIGSTKSZ|SIGRT)' |
   334		sort
   335	)
   336	
   337	# Again, writing regexps to a file.
   338	echo '#include <errno.h>' | $CC -x c - -E -dM $ccflags |
   339		awk '$1=="#define" && $2 ~ /^E[A-Z0-9_]+$/ { print "^\t" $2 "[ \t]*=" }' |
   340		sort >_error.grep
   341	echo '#include <signal.h>' | $CC -x c - -E -dM $ccflags |
   342		awk '$1=="#define" && $2 ~ /^SIG[A-Z0-9]+$/ { print "^\t" $2 "[ \t]*=" }' |
   343		egrep -v '(SIGSTKSIZE|SIGSTKSZ|SIGRT)' |
   344		sort >_signal.grep
   345	
   346	echo '// mkerrors.sh' "$@"
   347	echo '// MACHINE GENERATED BY THE COMMAND ABOVE; DO NOT EDIT'
   348	echo
   349	go tool cgo -godefs -- "$@" _const.go >_error.out
   350	cat _error.out | grep -vf _error.grep | grep -vf _signal.grep
   351	echo
   352	echo '// Errors'
   353	echo 'const ('
   354	cat _error.out | grep -f _error.grep | sed 's/=\(.*\)/= Errno(\1)/'
   355	echo ')'
   356	
   357	echo
   358	echo '// Signals'
   359	echo 'const ('
   360	cat _error.out | grep -f _signal.grep | sed 's/=\(.*\)/= Signal(\1)/'
   361	echo ')'
   362	
   363	# Run C program to print error and syscall strings.
   364	(
   365		echo -E "
   366	#include <stdio.h>
   367	#include <stdlib.h>
   368	#include <errno.h>
   369	#include <ctype.h>
   370	#include <string.h>
   371	#include <signal.h>
   372	
   373	#define nelem(x) (sizeof(x)/sizeof((x)[0]))
   374	
   375	enum { A = 'A', Z = 'Z', a = 'a', z = 'z' }; // avoid need for single quotes below
   376	
   377	int errors[] = {
   378	"
   379		for i in $errors
   380		do
   381			echo -E '	'$i,
   382		done
   383	
   384		echo -E "
   385	};
   386	
   387	int signals[] = {
   388	"
   389		for i in $signals
   390		do
   391			echo -E '	'$i,
   392		done
   393	
   394		# Use -E because on some systems bash builtin interprets \n itself.
   395		echo -E '
   396	};
   397	
   398	static int
   399	intcmp(const void *a, const void *b)
   400	{
   401		return *(int*)a - *(int*)b;
   402	}
   403	
   404	int
   405	main(void)
   406	{
   407		int i, j, e;
   408		char buf[1024], *p;
   409	
   410		printf("\n\n// Error table\n");
   411		printf("var errors = [...]string {\n");
   412		qsort(errors, nelem(errors), sizeof errors[0], intcmp);
   413		for(i=0; i<nelem(errors); i++) {
   414			e = errors[i];
   415			if(i > 0 && errors[i-1] == e)
   416				continue;
   417			strcpy(buf, strerror(e));
   418			// lowercase first letter: Bad -> bad, but STREAM -> STREAM.
   419			if(A <= buf[0] && buf[0] <= Z && a <= buf[1] && buf[1] <= z)
   420				buf[0] += a - A;
   421			printf("\t%d: \"%s\",\n", e, buf);
   422		}
   423		printf("}\n\n");
   424		
   425		printf("\n\n// Signal table\n");
   426		printf("var signals = [...]string {\n");
   427		qsort(signals, nelem(signals), sizeof signals[0], intcmp);
   428		for(i=0; i<nelem(signals); i++) {
   429			e = signals[i];
   430			if(i > 0 && signals[i-1] == e)
   431				continue;
   432			strcpy(buf, strsignal(e));
   433			// lowercase first letter: Bad -> bad, but STREAM -> STREAM.
   434			if(A <= buf[0] && buf[0] <= Z && a <= buf[1] && buf[1] <= z)
   435				buf[0] += a - A;
   436			// cut trailing : number.
   437			p = strrchr(buf, ":"[0]);
   438			if(p)
   439				*p = '\0';
   440			printf("\t%d: \"%s\",\n", e, buf);
   441		}
   442		printf("}\n\n");
   443	
   444		return 0;
   445	}
   446	
   447	'
   448	) >_errors.c
   449	
   450	$CC $ccflags -o _errors _errors.c && $GORUN ./_errors && rm -f _errors.c _errors _const.go _error.grep _signal.grep _error.out

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