contrib/chg/util.c
author Augie Fackler <raf@durin42.com>
Tue, 22 Aug 2017 14:15:16 -0400
changeset 33914 a0aeb096bb12
parent 28855 f5764e177bbe
child 34309 b94db1780365
permissions -rw-r--r--
tests: blacklist some more entries in module import checks
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
28060
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
     1
/*
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
     2
 * Utility functions
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
     3
 *
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
     4
 * Copyright (c) 2011 Yuya Nishihara <yuya@tcha.org>
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
     5
 *
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
     6
 * This software may be used and distributed according to the terms of the
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
     7
 * GNU General Public License version 2 or any later version.
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
     8
 */
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
     9
28788
57a78a64de44 chg: add util function abortmsgerrno to print error with errno
Jun Wu <quark@fb.com>
parents: 28787
diff changeset
    10
#include <errno.h>
28855
f5764e177bbe chg: extract the logic of setting FD_CLOEXEC to a utility function
Jun Wu <quark@fb.com>
parents: 28854
diff changeset
    11
#include <fcntl.h>
28060
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
    12
#include <signal.h>
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
    13
#include <stdarg.h>
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
    14
#include <stdio.h>
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
    15
#include <stdlib.h>
28084
3fc45956c978 chg: initialize sigaction fields more reliably
Yuya Nishihara <yuya@tcha.org>
parents: 28060
diff changeset
    16
#include <string.h>
28060
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
    17
#include <sys/types.h>
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
    18
#include <sys/wait.h>
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
    19
#include <unistd.h>
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
    20
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
    21
#include "util.h"
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
    22
28787
ea86cdcd9b50 chg: use color in debug/error messages conditionally
Jun Wu <quark@fb.com>
parents: 28165
diff changeset
    23
static int colorenabled = 0;
ea86cdcd9b50 chg: use color in debug/error messages conditionally
Jun Wu <quark@fb.com>
parents: 28165
diff changeset
    24
ea86cdcd9b50 chg: use color in debug/error messages conditionally
Jun Wu <quark@fb.com>
parents: 28165
diff changeset
    25
static inline void fsetcolor(FILE *fp, const char *code)
ea86cdcd9b50 chg: use color in debug/error messages conditionally
Jun Wu <quark@fb.com>
parents: 28165
diff changeset
    26
{
ea86cdcd9b50 chg: use color in debug/error messages conditionally
Jun Wu <quark@fb.com>
parents: 28165
diff changeset
    27
	if (!colorenabled)
ea86cdcd9b50 chg: use color in debug/error messages conditionally
Jun Wu <quark@fb.com>
parents: 28165
diff changeset
    28
		return;
ea86cdcd9b50 chg: use color in debug/error messages conditionally
Jun Wu <quark@fb.com>
parents: 28165
diff changeset
    29
	fprintf(fp, "\033[%sm", code);
ea86cdcd9b50 chg: use color in debug/error messages conditionally
Jun Wu <quark@fb.com>
parents: 28165
diff changeset
    30
}
ea86cdcd9b50 chg: use color in debug/error messages conditionally
Jun Wu <quark@fb.com>
parents: 28165
diff changeset
    31
28788
57a78a64de44 chg: add util function abortmsgerrno to print error with errno
Jun Wu <quark@fb.com>
parents: 28787
diff changeset
    32
static void vabortmsgerrno(int no, const char *fmt, va_list args)
57a78a64de44 chg: add util function abortmsgerrno to print error with errno
Jun Wu <quark@fb.com>
parents: 28787
diff changeset
    33
{
57a78a64de44 chg: add util function abortmsgerrno to print error with errno
Jun Wu <quark@fb.com>
parents: 28787
diff changeset
    34
	fsetcolor(stderr, "1;31");
57a78a64de44 chg: add util function abortmsgerrno to print error with errno
Jun Wu <quark@fb.com>
parents: 28787
diff changeset
    35
	fputs("chg: abort: ", stderr);
57a78a64de44 chg: add util function abortmsgerrno to print error with errno
Jun Wu <quark@fb.com>
parents: 28787
diff changeset
    36
	vfprintf(stderr, fmt, args);
57a78a64de44 chg: add util function abortmsgerrno to print error with errno
Jun Wu <quark@fb.com>
parents: 28787
diff changeset
    37
	if (no != 0)
57a78a64de44 chg: add util function abortmsgerrno to print error with errno
Jun Wu <quark@fb.com>
parents: 28787
diff changeset
    38
		fprintf(stderr, " (errno = %d, %s)", no, strerror(no));
57a78a64de44 chg: add util function abortmsgerrno to print error with errno
Jun Wu <quark@fb.com>
parents: 28787
diff changeset
    39
	fsetcolor(stderr, "");
57a78a64de44 chg: add util function abortmsgerrno to print error with errno
Jun Wu <quark@fb.com>
parents: 28787
diff changeset
    40
	fputc('\n', stderr);
57a78a64de44 chg: add util function abortmsgerrno to print error with errno
Jun Wu <quark@fb.com>
parents: 28787
diff changeset
    41
	exit(255);
57a78a64de44 chg: add util function abortmsgerrno to print error with errno
Jun Wu <quark@fb.com>
parents: 28787
diff changeset
    42
}
57a78a64de44 chg: add util function abortmsgerrno to print error with errno
Jun Wu <quark@fb.com>
parents: 28787
diff changeset
    43
28060
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
    44
void abortmsg(const char *fmt, ...)
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
    45
{
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
    46
	va_list args;
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
    47
	va_start(args, fmt);
28788
57a78a64de44 chg: add util function abortmsgerrno to print error with errno
Jun Wu <quark@fb.com>
parents: 28787
diff changeset
    48
	vabortmsgerrno(0, fmt, args);
28060
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
    49
	va_end(args);
28788
57a78a64de44 chg: add util function abortmsgerrno to print error with errno
Jun Wu <quark@fb.com>
parents: 28787
diff changeset
    50
}
28060
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
    51
28788
57a78a64de44 chg: add util function abortmsgerrno to print error with errno
Jun Wu <quark@fb.com>
parents: 28787
diff changeset
    52
void abortmsgerrno(const char *fmt, ...)
57a78a64de44 chg: add util function abortmsgerrno to print error with errno
Jun Wu <quark@fb.com>
parents: 28787
diff changeset
    53
{
57a78a64de44 chg: add util function abortmsgerrno to print error with errno
Jun Wu <quark@fb.com>
parents: 28787
diff changeset
    54
	int no = errno;
57a78a64de44 chg: add util function abortmsgerrno to print error with errno
Jun Wu <quark@fb.com>
parents: 28787
diff changeset
    55
	va_list args;
57a78a64de44 chg: add util function abortmsgerrno to print error with errno
Jun Wu <quark@fb.com>
parents: 28787
diff changeset
    56
	va_start(args, fmt);
57a78a64de44 chg: add util function abortmsgerrno to print error with errno
Jun Wu <quark@fb.com>
parents: 28787
diff changeset
    57
	vabortmsgerrno(no, fmt, args);
57a78a64de44 chg: add util function abortmsgerrno to print error with errno
Jun Wu <quark@fb.com>
parents: 28787
diff changeset
    58
	va_end(args);
28060
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
    59
}
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
    60
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
    61
static int debugmsgenabled = 0;
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
    62
28787
ea86cdcd9b50 chg: use color in debug/error messages conditionally
Jun Wu <quark@fb.com>
parents: 28165
diff changeset
    63
void enablecolor(void)
ea86cdcd9b50 chg: use color in debug/error messages conditionally
Jun Wu <quark@fb.com>
parents: 28165
diff changeset
    64
{
ea86cdcd9b50 chg: use color in debug/error messages conditionally
Jun Wu <quark@fb.com>
parents: 28165
diff changeset
    65
	colorenabled = 1;
ea86cdcd9b50 chg: use color in debug/error messages conditionally
Jun Wu <quark@fb.com>
parents: 28165
diff changeset
    66
}
ea86cdcd9b50 chg: use color in debug/error messages conditionally
Jun Wu <quark@fb.com>
parents: 28165
diff changeset
    67
28060
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
    68
void enabledebugmsg(void)
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
    69
{
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
    70
	debugmsgenabled = 1;
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
    71
}
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
    72
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
    73
void debugmsg(const char *fmt, ...)
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
    74
{
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
    75
	if (!debugmsgenabled)
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
    76
		return;
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
    77
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
    78
	va_list args;
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
    79
	va_start(args, fmt);
28787
ea86cdcd9b50 chg: use color in debug/error messages conditionally
Jun Wu <quark@fb.com>
parents: 28165
diff changeset
    80
	fsetcolor(stderr, "1;30");
ea86cdcd9b50 chg: use color in debug/error messages conditionally
Jun Wu <quark@fb.com>
parents: 28165
diff changeset
    81
	fputs("chg: debug: ", stderr);
28060
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
    82
	vfprintf(stderr, fmt, args);
28787
ea86cdcd9b50 chg: use color in debug/error messages conditionally
Jun Wu <quark@fb.com>
parents: 28165
diff changeset
    83
	fsetcolor(stderr, "");
ea86cdcd9b50 chg: use color in debug/error messages conditionally
Jun Wu <quark@fb.com>
parents: 28165
diff changeset
    84
	fputc('\n', stderr);
28060
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
    85
	va_end(args);
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
    86
}
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
    87
28854
ddef14468952 chg: add fchdirx as a utility function
Jun Wu <quark@fb.com>
parents: 28788
diff changeset
    88
void fchdirx(int dirfd)
ddef14468952 chg: add fchdirx as a utility function
Jun Wu <quark@fb.com>
parents: 28788
diff changeset
    89
{
ddef14468952 chg: add fchdirx as a utility function
Jun Wu <quark@fb.com>
parents: 28788
diff changeset
    90
	int r = fchdir(dirfd);
ddef14468952 chg: add fchdirx as a utility function
Jun Wu <quark@fb.com>
parents: 28788
diff changeset
    91
	if (r == -1)
ddef14468952 chg: add fchdirx as a utility function
Jun Wu <quark@fb.com>
parents: 28788
diff changeset
    92
		abortmsgerrno("failed to fchdir");
ddef14468952 chg: add fchdirx as a utility function
Jun Wu <quark@fb.com>
parents: 28788
diff changeset
    93
}
ddef14468952 chg: add fchdirx as a utility function
Jun Wu <quark@fb.com>
parents: 28788
diff changeset
    94
28855
f5764e177bbe chg: extract the logic of setting FD_CLOEXEC to a utility function
Jun Wu <quark@fb.com>
parents: 28854
diff changeset
    95
void fsetcloexec(int fd)
f5764e177bbe chg: extract the logic of setting FD_CLOEXEC to a utility function
Jun Wu <quark@fb.com>
parents: 28854
diff changeset
    96
{
f5764e177bbe chg: extract the logic of setting FD_CLOEXEC to a utility function
Jun Wu <quark@fb.com>
parents: 28854
diff changeset
    97
	int flags = fcntl(fd, F_GETFD);
f5764e177bbe chg: extract the logic of setting FD_CLOEXEC to a utility function
Jun Wu <quark@fb.com>
parents: 28854
diff changeset
    98
	if (flags < 0)
f5764e177bbe chg: extract the logic of setting FD_CLOEXEC to a utility function
Jun Wu <quark@fb.com>
parents: 28854
diff changeset
    99
		abortmsgerrno("cannot get flags of fd %d", fd);
f5764e177bbe chg: extract the logic of setting FD_CLOEXEC to a utility function
Jun Wu <quark@fb.com>
parents: 28854
diff changeset
   100
	if (fcntl(fd, F_SETFD, flags | FD_CLOEXEC) < 0)
f5764e177bbe chg: extract the logic of setting FD_CLOEXEC to a utility function
Jun Wu <quark@fb.com>
parents: 28854
diff changeset
   101
		abortmsgerrno("cannot set flags of fd %d", fd);
f5764e177bbe chg: extract the logic of setting FD_CLOEXEC to a utility function
Jun Wu <quark@fb.com>
parents: 28854
diff changeset
   102
}
f5764e177bbe chg: extract the logic of setting FD_CLOEXEC to a utility function
Jun Wu <quark@fb.com>
parents: 28854
diff changeset
   103
28165
c6705c6303dd chg: add utility functions mallocx, reallocx
Jun Wu <quark@fb.com>
parents: 28084
diff changeset
   104
void *mallocx(size_t size)
c6705c6303dd chg: add utility functions mallocx, reallocx
Jun Wu <quark@fb.com>
parents: 28084
diff changeset
   105
{
c6705c6303dd chg: add utility functions mallocx, reallocx
Jun Wu <quark@fb.com>
parents: 28084
diff changeset
   106
	void *result = malloc(size);
c6705c6303dd chg: add utility functions mallocx, reallocx
Jun Wu <quark@fb.com>
parents: 28084
diff changeset
   107
	if (!result)
c6705c6303dd chg: add utility functions mallocx, reallocx
Jun Wu <quark@fb.com>
parents: 28084
diff changeset
   108
		abortmsg("failed to malloc");
c6705c6303dd chg: add utility functions mallocx, reallocx
Jun Wu <quark@fb.com>
parents: 28084
diff changeset
   109
	return result;
c6705c6303dd chg: add utility functions mallocx, reallocx
Jun Wu <quark@fb.com>
parents: 28084
diff changeset
   110
}
c6705c6303dd chg: add utility functions mallocx, reallocx
Jun Wu <quark@fb.com>
parents: 28084
diff changeset
   111
c6705c6303dd chg: add utility functions mallocx, reallocx
Jun Wu <quark@fb.com>
parents: 28084
diff changeset
   112
void *reallocx(void *ptr, size_t size)
c6705c6303dd chg: add utility functions mallocx, reallocx
Jun Wu <quark@fb.com>
parents: 28084
diff changeset
   113
{
c6705c6303dd chg: add utility functions mallocx, reallocx
Jun Wu <quark@fb.com>
parents: 28084
diff changeset
   114
	void *result = realloc(ptr, size);
c6705c6303dd chg: add utility functions mallocx, reallocx
Jun Wu <quark@fb.com>
parents: 28084
diff changeset
   115
	if (!result)
c6705c6303dd chg: add utility functions mallocx, reallocx
Jun Wu <quark@fb.com>
parents: 28084
diff changeset
   116
		abortmsg("failed to realloc");
c6705c6303dd chg: add utility functions mallocx, reallocx
Jun Wu <quark@fb.com>
parents: 28084
diff changeset
   117
	return result;
c6705c6303dd chg: add utility functions mallocx, reallocx
Jun Wu <quark@fb.com>
parents: 28084
diff changeset
   118
}
c6705c6303dd chg: add utility functions mallocx, reallocx
Jun Wu <quark@fb.com>
parents: 28084
diff changeset
   119
28060
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   120
/*
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   121
 * Execute a shell command in mostly the same manner as system(), with the
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   122
 * give environment variables, after chdir to the given cwd. Returns a status
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   123
 * code compatible with the Python subprocess module.
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   124
 */
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   125
int runshellcmd(const char *cmd, const char *envp[], const char *cwd)
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   126
{
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   127
	enum { F_SIGINT = 1, F_SIGQUIT = 2, F_SIGMASK = 4, F_WAITPID = 8 };
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   128
	unsigned int doneflags = 0;
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   129
	int status = 0;
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   130
	struct sigaction newsa, oldsaint, oldsaquit;
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   131
	sigset_t oldmask;
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   132
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   133
	/* block or mask signals just as system() does */
28084
3fc45956c978 chg: initialize sigaction fields more reliably
Yuya Nishihara <yuya@tcha.org>
parents: 28060
diff changeset
   134
	memset(&newsa, 0, sizeof(newsa));
28060
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   135
	newsa.sa_handler = SIG_IGN;
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   136
	newsa.sa_flags = 0;
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   137
	if (sigemptyset(&newsa.sa_mask) < 0)
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   138
		goto done;
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   139
	if (sigaction(SIGINT, &newsa, &oldsaint) < 0)
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   140
		goto done;
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   141
	doneflags |= F_SIGINT;
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   142
	if (sigaction(SIGQUIT, &newsa, &oldsaquit) < 0)
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   143
		goto done;
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   144
	doneflags |= F_SIGQUIT;
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   145
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   146
	if (sigaddset(&newsa.sa_mask, SIGCHLD) < 0)
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   147
		goto done;
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   148
	if (sigprocmask(SIG_BLOCK, &newsa.sa_mask, &oldmask) < 0)
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   149
		goto done;
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   150
	doneflags |= F_SIGMASK;
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   151
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   152
	pid_t pid = fork();
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   153
	if (pid < 0)
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   154
		goto done;
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   155
	if (pid == 0) {
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   156
		sigaction(SIGINT, &oldsaint, NULL);
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   157
		sigaction(SIGQUIT, &oldsaquit, NULL);
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   158
		sigprocmask(SIG_SETMASK, &oldmask, NULL);
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   159
		if (cwd && chdir(cwd) < 0)
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   160
			_exit(127);
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   161
		const char *argv[] = {"sh", "-c", cmd, NULL};
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   162
		if (envp) {
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   163
			execve("/bin/sh", (char **)argv, (char **)envp);
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   164
		} else {
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   165
			execv("/bin/sh", (char **)argv);
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   166
		}
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   167
		_exit(127);
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   168
	} else {
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   169
		if (waitpid(pid, &status, 0) < 0)
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   170
			goto done;
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   171
		doneflags |= F_WAITPID;
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   172
	}
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   173
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   174
done:
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   175
	if (doneflags & F_SIGINT)
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   176
		sigaction(SIGINT, &oldsaint, NULL);
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   177
	if (doneflags & F_SIGQUIT)
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   178
		sigaction(SIGQUIT, &oldsaquit, NULL);
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   179
	if (doneflags & F_SIGMASK)
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   180
		sigprocmask(SIG_SETMASK, &oldmask, NULL);
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   181
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   182
	/* no way to report other errors, use 127 (= shell termination) */
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   183
	if (!(doneflags & F_WAITPID))
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   184
		return 127;
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   185
	if (WIFEXITED(status))
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   186
		return WEXITSTATUS(status);
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   187
	if (WIFSIGNALED(status))
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   188
		return -WTERMSIG(status);
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   189
	return 127;
726f8d6cc324 chg: import frontend sources
Yuya Nishihara <yuya@tcha.org>
parents:
diff changeset
   190
}