2 * Copyright (c) 2007 Joerg Sonnenberger
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR
15 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
16 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
17 * IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT,
18 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
19 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
20 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
21 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
23 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26 #include "archive_platform.h"
28 __FBSDID("$FreeBSD$");
30 #if defined(HAVE_POLL)
31 # if defined(HAVE_POLL_H)
34 #elif defined(HAVE_SELECT)
35 # if defined(HAVE_SYS_SELECT_H)
36 # include <sys/select.h>
37 # elif defined(HAVE_UNISTD_H)
48 #include "filter_fork.h"
51 __archive_create_child(const char *path
, int *child_stdin
, int *child_stdout
)
54 int stdin_pipe
[2], stdout_pipe
[2], tmp
;
56 if (pipe(stdin_pipe
) == -1)
58 if (stdin_pipe
[0] == STDOUT_FILENO
) {
59 if ((tmp
= dup(stdin_pipe
[0])) == -1)
64 if (pipe(stdout_pipe
) == -1)
66 if (stdout_pipe
[1] == STDIN_FILENO
) {
67 if ((tmp
= dup(stdout_pipe
[1])) == -1)
69 close(stdout_pipe
[1]);
73 switch ((child
= vfork())) {
78 close(stdout_pipe
[0]);
79 if (dup2(stdin_pipe
[0], STDIN_FILENO
) == -1)
81 if (stdin_pipe
[0] != STDIN_FILENO
)
83 if (dup2(stdout_pipe
[1], STDOUT_FILENO
) == -1)
85 if (stdout_pipe
[1] != STDOUT_FILENO
)
86 close(stdout_pipe
[1]);
87 execlp(path
, path
, (char *)NULL
);
91 close(stdout_pipe
[1]);
93 *child_stdin
= stdin_pipe
[1];
94 fcntl(*child_stdin
, F_SETFL
, O_NONBLOCK
);
95 *child_stdout
= stdout_pipe
[0];
96 fcntl(*child_stdout
, F_SETFL
, O_NONBLOCK
);
102 close(stdout_pipe
[0]);
103 close(stdout_pipe
[1]);
105 close(stdin_pipe
[0]);
106 close(stdin_pipe
[1]);
112 __archive_check_child(int in
, int out
)
114 #if defined(HAVE_POLL)
115 struct pollfd fds
[2];
118 fds
[0].events
= POLLOUT
;
120 fds
[1].events
= POLLIN
;
122 poll(fds
, 2, -1); /* -1 == INFTIM, wait forever */
123 #elif defined(HAVE_SELECT)
124 fd_set fds_in
, fds_out
, fds_error
;
127 FD_SET(out
, &fds_in
);
129 FD_SET(in
, &fds_out
);
131 FD_SET(in
, &fds_error
);
132 FD_SET(out
, &fds_error
);
133 select(in
< out
? out
+ 1 : in
+ 1, &fds_in
, &fds_out
, &fds_error
, NULL
);