#!/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

if test -z "$GOARCH" -o -z "$GOOS"; then

	echo 1>&2 "GOARCH or GOOS not defined in environment"

	exit 1

fi

# Check that we are using the new build system if we should

if [[ "$GOOS" = "linux" ]] && [[ "$GOLANG_SYS_BUILD" != "docker" ]]; then

	echo 1>&2 "In the Docker based build system, mkerrors should not be called directly."

	echo 1>&2 "See README.md"

	exit 1

fi

if [[ "$GOOS" = "aix" ]]; then

	CC=${CC:-gcc}

else

	CC=${CC:-cc}

fi

if [[ "$GOOS" = "solaris" ]]; then

	# Assumes GNU versions of utilities in PATH.

	export PATH=/usr/gnu/bin:$PATH

fi

uname=$(uname)

includes_AIX='

#include <net/if.h>

#include <net/netopt.h>

#include <netinet/ip_mroute.h>

#include <sys/protosw.h>

#include <sys/stropts.h>

#include <sys/mman.h>

#include <sys/poll.h>

#include <sys/select.h>

#include <sys/termio.h>

#include <termios.h>

#include <fcntl.h>

#define AF_LOCAL AF_UNIX

'

includes_Darwin='

#define _DARWIN_C_SOURCE

#define KERNEL

#define _DARWIN_USE_64_BIT_INODE

#include <stdint.h>

#include <sys/attr.h>

#include <sys/types.h>

#include <sys/event.h>

#include <sys/ptrace.h>

#include <sys/select.h>

#include <sys/socket.h>

#include <sys/sockio.h>

#include <sys/sysctl.h>

#include <sys/mman.h>

#include <sys/mount.h>

#include <sys/utsname.h>

#include <sys/wait.h>

#include <sys/xattr.h>

#include <net/bpf.h>

#include <net/if.h>

#include <net/if_types.h>

#include <net/route.h>

#include <netinet/in.h>

#include <netinet/ip.h>

#include <termios.h>

'

includes_DragonFly='

#include <sys/types.h>

#include <sys/event.h>

#include <sys/select.h>

#include <sys/socket.h>

#include <sys/sockio.h>

#include <sys/stat.h>

#include <sys/sysctl.h>

#include <sys/mman.h>

#include <sys/mount.h>

#include <sys/wait.h>

#include <sys/ioctl.h>

#include <net/bpf.h>

#include <net/if.h>

#include <net/if_types.h>

#include <net/route.h>

#include <netinet/in.h>

#include <termios.h>

#include <netinet/ip.h>

#include <net/ip_mroute/ip_mroute.h>

'

includes_FreeBSD='

#include <sys/capsicum.h>

#include <sys/param.h>

#include <sys/types.h>

#include <sys/event.h>

#include <sys/select.h>

#include <sys/socket.h>

#include <sys/sockio.h>

#include <sys/stat.h>

#include <sys/sysctl.h>

#include <sys/mman.h>

#include <sys/mount.h>

#include <sys/wait.h>

#include <sys/ioctl.h>

#include <net/bpf.h>

#include <net/if.h>

#include <net/if_types.h>

#include <net/route.h>

#include <netinet/in.h>

#include <termios.h>

#include <netinet/ip.h>

#include <netinet/ip_mroute.h>

#include <sys/extattr.h>

#if __FreeBSD__ >= 10

#define IFT_CARP	0xf8	// IFT_CARP is deprecated in FreeBSD 10

#undef SIOCAIFADDR

#define SIOCAIFADDR	_IOW(105, 26, struct oifaliasreq)	// ifaliasreq contains if_data

#undef SIOCSIFPHYADDR

#define SIOCSIFPHYADDR	_IOW(105, 70, struct oifaliasreq)	// ifaliasreq contains if_data

#endif

'

includes_Linux='

#define _LARGEFILE_SOURCE

#define _LARGEFILE64_SOURCE

#ifndef __LP64__

#define _FILE_OFFSET_BITS 64

#endif

#define _GNU_SOURCE

// <sys/ioctl.h> is broken on powerpc64, as it fails to include definitions of

// these structures. We just include them copied from <bits/termios.h>.

#if defined(__powerpc__)

struct sgttyb {

        char    sg_ispeed;

        char    sg_ospeed;

        char    sg_erase;

        char    sg_kill;

        short   sg_flags;

};

struct tchars {

        char    t_intrc;

        char    t_quitc;

        char    t_startc;

        char    t_stopc;

        char    t_eofc;

        char    t_brkc;

};

struct ltchars {

        char    t_suspc;

        char    t_dsuspc;

        char    t_rprntc;

        char    t_flushc;

        char    t_werasc;

        char    t_lnextc;

};

#endif

#include <bits/sockaddr.h>

#include <sys/epoll.h>

#include <sys/eventfd.h>

#include <sys/inotify.h>

#include <sys/ioctl.h>

#include <sys/mman.h>

#include <sys/mount.h>

#include <sys/prctl.h>

#include <sys/stat.h>

#include <sys/types.h>

#include <sys/time.h>

#include <sys/select.h>

#include <sys/signalfd.h>

#include <sys/socket.h>

#include <sys/uio.h>

#include <sys/xattr.h>

#include <linux/bpf.h>

#include <linux/can.h>

#include <linux/capability.h>

#include <linux/cryptouser.h>

#include <linux/devlink.h>

#include <linux/errqueue.h>

#include <linux/falloc.h>

#include <linux/fanotify.h>

#include <linux/filter.h>

#include <linux/fs.h>

#include <linux/fscrypt.h>

#include <linux/genetlink.h>

#include <linux/hdreg.h>

#include <linux/icmpv6.h>

#include <linux/if.h>

#include <linux/if_addr.h>

#include <linux/if_alg.h>

#include <linux/if_arp.h>

#include <linux/if_ether.h>

#include <linux/if_ppp.h>

#include <linux/if_tun.h>

#include <linux/if_packet.h>

#include <linux/if_xdp.h>

#include <linux/kexec.h>

#include <linux/keyctl.h>

#include <linux/loop.h>

#include <linux/magic.h>

#include <linux/memfd.h>

#include <linux/module.h>

#include <linux/netfilter/nfnetlink.h>

#include <linux/netlink.h>

#include <linux/net_namespace.h>

#include <linux/nsfs.h>

#include <linux/perf_event.h>

#include <linux/ptrace.h>

#include <linux/random.h>

#include <linux/reboot.h>

#include <linux/rtc.h>

#include <linux/rtnetlink.h>

#include <linux/sched.h>

#include <linux/seccomp.h>

#include <linux/serial.h>

#include <linux/sockios.h>

#include <linux/taskstats.h>

#include <linux/tipc.h>

#include <linux/vm_sockets.h>

#include <linux/wait.h>

#include <linux/watchdog.h>

#include <mtd/ubi-user.h>

#include <net/route.h>

#if defined(__sparc__)

// On sparc{,64}, the kernel defines struct termios2 itself which clashes with the

// definition in glibc. As only the error constants are needed here, include the

// generic termibits.h (which is included by termbits.h on sparc).

#include <asm-generic/termbits.h>

#else

#include <asm/termbits.h>

#endif

#ifndef MSG_FASTOPEN

#define MSG_FASTOPEN    0x20000000

#endif

#ifndef PTRACE_GETREGS

#define PTRACE_GETREGS	0xc

#endif

#ifndef PTRACE_SETREGS

#define PTRACE_SETREGS	0xd

#endif

#ifndef SOL_NETLINK

#define SOL_NETLINK	270

#endif

#ifdef SOL_BLUETOOTH

// SPARC includes this in /usr/include/sparc64-linux-gnu/bits/socket.h

// but it is already in bluetooth_linux.go

#undef SOL_BLUETOOTH

#endif

// Certain constants are missing from the fs/crypto UAPI

#define FS_KEY_DESC_PREFIX              "fscrypt:"

#define FS_KEY_DESC_PREFIX_SIZE         8

#define FS_MAX_KEY_SIZE                 64

// The code generator produces -0x1 for (~0), but an unsigned value is necessary

// for the tipc_subscr timeout __u32 field.

#undef TIPC_WAIT_FOREVER

#define TIPC_WAIT_FOREVER 0xffffffff

'

includes_NetBSD='

#include <sys/types.h>

#include <sys/param.h>

#include <sys/event.h>

#include <sys/extattr.h>

#include <sys/mman.h>

#include <sys/mount.h>

#include <sys/select.h>

#include <sys/socket.h>

#include <sys/sockio.h>

#include <sys/sysctl.h>

#include <sys/termios.h>

#include <sys/ttycom.h>

#include <sys/wait.h>

#include <net/bpf.h>

#include <net/if.h>

#include <net/if_types.h>

#include <net/route.h>

#include <netinet/in.h>

#include <netinet/in_systm.h>

#include <netinet/ip.h>

#include <netinet/ip_mroute.h>

#include <netinet/if_ether.h>

// Needed since <sys/param.h> refers to it...

#define schedppq 1

'

includes_OpenBSD='

#include <sys/types.h>

#include <sys/param.h>

#include <sys/event.h>

#include <sys/mman.h>

#include <sys/mount.h>

#include <sys/select.h>

#include <sys/socket.h>

#include <sys/sockio.h>

#include <sys/stat.h>

#include <sys/sysctl.h>

#include <sys/termios.h>

#include <sys/ttycom.h>

#include <sys/unistd.h>

#include <sys/wait.h>

#include <net/bpf.h>

#include <net/if.h>

#include <net/if_types.h>

#include <net/if_var.h>

#include <net/route.h>

#include <netinet/in.h>

#include <netinet/in_systm.h>

#include <netinet/ip.h>

#include <netinet/ip_mroute.h>

#include <netinet/if_ether.h>

#include <net/if_bridge.h>

// We keep some constants not supported in OpenBSD 5.5 and beyond for

// the promise of compatibility.

#define EMUL_ENABLED		0x1

#define EMUL_NATIVE		0x2

#define IPV6_FAITH		0x1d

#define IPV6_OPTIONS		0x1

#define IPV6_RTHDR_STRICT	0x1

#define IPV6_SOCKOPT_RESERVED1	0x3

#define SIOCGIFGENERIC		0xc020693a

#define SIOCSIFGENERIC		0x80206939

#define WALTSIG			0x4

'

includes_SunOS='

#include <limits.h>

#include <sys/types.h>

#include <sys/select.h>

#include <sys/socket.h>

#include <sys/sockio.h>

#include <sys/stat.h>

#include <sys/mman.h>

#include <sys/wait.h>

#include <sys/ioctl.h>

#include <sys/mkdev.h>

#include <net/bpf.h>

#include <net/if.h>

#include <net/if_arp.h>

#include <net/if_types.h>

#include <net/route.h>

#include <netinet/in.h>

#include <termios.h>

#include <netinet/ip.h>

#include <netinet/ip_mroute.h>

'

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>

#include <time.h>

'

ccflags="$@"

# Write go tool cgo -godefs input.

(

	echo package unix

	echo

	echo '/*'

	indirect="includes_$(uname)"

	echo "${!indirect} $includes"

	echo '*/'

	echo 'import "C"'

	echo 'import "syscall"'

	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}

		$2 ~ /^ELF_.*$/ {next}# <asm/elf.h> contains ELF_ARCH, etc.

		$2 ~ /^EXTATTR_NAMESPACE_NAMES/ ||

		$2 ~ /^EXTATTR_NAMESPACE_[A-Z]+_STRING/ {next}

		$2 !~ /^ECCAPBITS/ &&

		$2 !~ /^ETH_/ &&

		$2 !~ /^EPROC_/ &&

		$2 !~ /^EQUIV_/ &&

		$2 !~ /^EXPR_/ &&

		$2 ~ /^E[A-Z0-9_]+$/ ||

		$2 ~ /^B[0-9_]+$/ ||

		$2 ~ /^(OLD|NEW)DEV$/ ||

		$2 == "BOTHER" ||

		$2 ~ /^CI?BAUD(EX)?$/ ||

		$2 == "IBSHIFT" ||

		$2 ~ /^V[A-Z0-9]+$/ ||

		$2 ~ /^CS[A-Z0-9]/ ||

		$2 ~ /^I(SIG|CANON|CRNL|UCLC|EXTEN|MAXBEL|STRIP|UTF8)$/ ||

		$2 ~ /^IGN/ ||

		$2 ~ /^IX(ON|ANY|OFF)$/ ||

		$2 ~ /^IN(LCR|PCK)$/ ||

		$2 !~ "X86_CR3_PCID_NOFLUSH" &&

		$2 ~ /(^FLU?SH)|(FLU?SH$)/ ||

		$2 ~ /^C(LOCAL|READ|MSPAR|RTSCTS)$/ ||

		$2 == "BRKINT" ||

		$2 == "HUPCL" ||

		$2 == "PENDIN" ||

		$2 == "TOSTOP" ||

		$2 == "XCASE" ||

		$2 == "ALTWERASE" ||

		$2 == "NOKERNINFO" ||

		$2 == "NFDBITS" ||

		$2 ~ /^PAR/ ||

		$2 ~ /^SIG[^_]/ ||

		$2 ~ /^O[CNPFPL][A-Z]+[^_][A-Z]+$/ ||

		$2 ~ /^(NL|CR|TAB|BS|VT|FF)DLY$/ ||

		$2 ~ /^(NL|CR|TAB|BS|VT|FF)[0-9]$/ ||

		$2 ~ /^O?XTABS$/ ||

		$2 ~ /^TC[IO](ON|OFF)$/ ||

		$2 ~ /^IN_/ ||

		$2 ~ /^LOCK_(SH|EX|NB|UN)$/ ||

		$2 ~ /^LO_(KEY|NAME)_SIZE$/ ||

		$2 ~ /^LOOP_(CLR|CTL|GET|SET)_/ ||

		$2 ~ /^(AF|SOCK|SO|SOL|IPPROTO|IP|IPV6|ICMP6|TCP|MCAST|EVFILT|NOTE|EV|SHUT|PROT|MAP|MFD|T?PACKET|MSG|SCM|MCL|DT|MADV|PR)_/ ||

		$2 ~ /^TP_STATUS_/ ||

		$2 ~ /^FALLOC_/ ||

		$2 == "ICMPV6_FILTER" ||

		$2 == "SOMAXCONN" ||

		$2 == "NAME_MAX" ||

		$2 == "IFNAMSIZ" ||

		$2 ~ /^CTL_(HW|KERN|MAXNAME|NET|QUERY)$/ ||

		$2 ~ /^KERN_(HOSTNAME|OS(RELEASE|TYPE)|VERSION)$/ ||

		$2 ~ /^HW_MACHINE$/ ||

		$2 ~ /^SYSCTL_VERS/ ||

		$2 !~ "MNT_BITS" &&

		$2 ~ /^(MS|MNT|UMOUNT)_/ ||

		$2 ~ /^NS_GET_/ ||

		$2 ~ /^TUN(SET|GET|ATTACH|DETACH)/ ||

		$2 ~ /^(O|F|[ES]?FD|NAME|S|PTRACE|PT)_/ ||

		$2 ~ /^KEXEC_/ ||

		$2 ~ /^LINUX_REBOOT_CMD_/ ||

		$2 ~ /^LINUX_REBOOT_MAGIC[12]$/ ||

		$2 ~ /^MODULE_INIT_/ ||

		$2 !~ "NLA_TYPE_MASK" &&

		$2 ~ /^(NETLINK|NLM|NLMSG|NLA|IFA|IFAN|RT|RTC|RTCF|RTN|RTPROT|RTNH|ARPHRD|ETH_P|NETNSA)_/ ||

		$2 ~ /^SIOC/ ||

		$2 ~ /^TIOC/ ||

		$2 ~ /^TCGET/ ||

		$2 ~ /^TCSET/ ||

		$2 ~ /^TC(FLSH|SBRKP?|XONC)$/ ||

		$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|LOCKS|MEMLOCK|MSGQUEUE|NICE|NOFILE|NPROC|RSS|RTPRIO|RTTIME|SIGPENDING|STACK)|RLIM_INFINITY/ ||

		$2 ~ /^PRIO_(PROCESS|PGRP|USER)/ ||

		$2 ~ /^CLONE_[A-Z_]+/ ||

		$2 !~ /^(BPF_TIMEVAL|BPF_FIB_LOOKUP_[A-Z]+)$/ &&

		$2 ~ /^(BPF|DLT)_/ ||

		$2 ~ /^(CLOCK|TIMER)_/ ||

		$2 ~ /^CAN_/ ||

		$2 ~ /^CAP_/ ||

		$2 ~ /^ALG_/ ||

		$2 ~ /^FS_(POLICY_FLAGS|KEY_DESC|ENCRYPTION_MODE|[A-Z0-9_]+_KEY_SIZE)/ ||

		$2 ~ /^FS_IOC_.*ENCRYPTION/ ||

		$2 ~ /^FSCRYPT_/ ||

		$2 ~ /^GRND_/ ||

		$2 ~ /^RND/ ||

		$2 ~ /^KEY_(SPEC|REQKEY_DEFL)_/ ||

		$2 ~ /^KEYCTL_/ ||

		$2 ~ /^PERF_EVENT_IOC_/ ||

		$2 ~ /^SECCOMP_MODE_/ ||

		$2 ~ /^SPLICE_/ ||

		$2 ~ /^SYNC_FILE_RANGE_/ ||

		$2 !~ /^AUDIT_RECORD_MAGIC/ &&

		$2 !~ /IOC_MAGIC/ &&

		$2 ~ /^[A-Z][A-Z0-9_]+_MAGIC2?$/ ||

		$2 ~ /^(VM|VMADDR)_/ ||

		$2 ~ /^IOCTL_VM_SOCKETS_/ ||

		$2 ~ /^(TASKSTATS|TS)_/ ||

		$2 ~ /^CGROUPSTATS_/ ||

		$2 ~ /^GENL_/ ||

		$2 ~ /^STATX_/ ||

		$2 ~ /^RENAME/ ||

		$2 ~ /^UBI_IOC[A-Z]/ ||

		$2 ~ /^UTIME_/ ||

		$2 ~ /^XATTR_(CREATE|REPLACE|NO(DEFAULT|FOLLOW|SECURITY)|SHOWCOMPRESSION)/ ||

		$2 ~ /^ATTR_(BIT_MAP_COUNT|(CMN|VOL|FILE)_)/ ||

		$2 ~ /^FSOPT_/ ||

		$2 ~ /^WDIOC_/ ||

		$2 ~ /^NFN/ ||

		$2 ~ /^XDP_/ ||

		$2 ~ /^RWF_/ ||

		$2 ~ /^(HDIO|WIN|SMART)_/ ||

		$2 ~ /^CRYPTO_/ ||

		$2 ~ /^TIPC_/ ||

		$2 ~ /^DEVLINK_/ ||

		$2 !~ "WMESGLEN" &&

		$2 ~ /^W[A-Z0-9]+$/ ||

		$2 ~/^PPPIOC/ ||

		$2 ~ /^FAN_|FANOTIFY_/ ||

		$2 ~ /^BLK[A-Z]*(GET$|SET$|BUF$|PART$|SIZE)/ {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 }' |

	egrep -v '(SIGSTKSIZE|SIGSTKSZ|SIGRT|SIGMAX64)' |

	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]*=" }' |

	egrep -v '(SIGSTKSIZE|SIGSTKSZ|SIGRT|SIGMAX64)' |

	sort >_signal.grep

echo '// mkerrors.sh' "$@"

echo '// Code generated by the command above; see README.md. DO NOT EDIT.'

echo

echo "// +build ${GOARCH},${GOOS}"

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/=\(.*\)/= syscall.Errno(\1)/'

echo ')'

echo

echo '// Signals'

echo 'const ('

cat _error.out | grep -f _signal.grep | sed 's/=\(.*\)/= syscall.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

struct tuple {

	int num;

	const char *name;

};

struct tuple errors[] = {

"

	for i in $errors

	do

		echo -E '	{'$i', "'$i'" },'

	done

	echo -E "

};

struct tuple signals[] = {

"

	for i in $signals

	do

		echo -E '	{'$i', "'$i'" },'

	done

	# Use -E because on some systems bash builtin interprets \n itself.

	echo -E '

};

static int

tuplecmp(const void *a, const void *b)

{

	return ((struct tuple *)a)->num - ((struct tuple *)b)->num;

}

int

main(void)

{

	int i, e;

	char buf[1024], *p;

	printf("\n\n// Error table\n");

	printf("var errorList = [...]struct {\n");

	printf("\tnum  syscall.Errno\n");

	printf("\tname string\n");

	printf("\tdesc string\n");

	printf("} {\n");

	qsort(errors, nelem(errors), sizeof errors[0], tuplecmp);

	for(i=0; i

		e = errors[i].num;

		if(i > 0 && errors[i-1].num == 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\", \"%s\" },\n", e, errors[i].name, buf);

	}

	printf("}\n\n");

	printf("\n\n// Signal table\n");

	printf("var signalList = [...]struct {\n");

	printf("\tnum  syscall.Signal\n");

	printf("\tname string\n");

	printf("\tdesc string\n");

	printf("} {\n");

	qsort(signals, nelem(signals), sizeof signals[0], tuplecmp);

	for(i=0; i

		e = signals[i].num;

		if(i > 0 && signals[i-1].num == 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\", \"%s\" },\n", e, signals[i].name, 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