2 * Copyright (c) 2010 The FreeBSD Foundation
5 * This software was developed by Pawel Jakub Dawidek under sponsorship from
6 * the FreeBSD Foundation.
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
30 #include <sys/cdefs.h>
31 __FBSDID("$FreeBSD$");
33 #include <sys/types.h>
57 * Close all descriptors.
59 maxfd = sysconf(_SC_OPEN_MAX);
61 pjdlog_errno(LOG_WARNING, "sysconf(_SC_OPEN_MAX) failed");
64 for (fd = 0; fd <= maxfd; fd++)
67 * Redirect stdin, stdout and stderr to /dev/null.
69 fd = open(_PATH_DEVNULL, O_RDONLY);
71 pjdlog_errno(LOG_WARNING, "Unable to open %s for reading",
73 } else if (fd != STDIN_FILENO) {
74 if (dup2(fd, STDIN_FILENO) < 0) {
75 pjdlog_errno(LOG_WARNING,
76 "Unable to duplicate descriptor for stdin");
80 fd = open(_PATH_DEVNULL, O_WRONLY);
82 pjdlog_errno(LOG_WARNING, "Unable to open %s for writing",
85 if (fd != STDOUT_FILENO && dup2(fd, STDOUT_FILENO) < 0) {
86 pjdlog_errno(LOG_WARNING,
87 "Unable to duplicate descriptor for stdout");
89 if (fd != STDERR_FILENO && dup2(fd, STDERR_FILENO) < 0) {
90 pjdlog_errno(LOG_WARNING,
91 "Unable to duplicate descriptor for stderr");
93 if (fd != STDOUT_FILENO && fd != STDERR_FILENO)
99 hook_exec(const char *path, ...)
105 ret = hook_execv(path, ap);
111 hook_execv(const char *path, va_list ap)
118 if (path == NULL || path[0] == '\0')
121 memset(args, 0, sizeof(args));
122 args[0] = basename(path);
123 for (ii = 1; ii < sizeof(args) / sizeof(args[0]); ii++) {
124 args[ii] = va_arg(ap, char *);
125 if (args[ii] == NULL)
128 assert(ii < sizeof(args) / sizeof(args[0]));
132 case -1: /* Error. */
133 pjdlog_errno(LOG_ERR, "Unable to fork %s", path);
138 pjdlog_errno(LOG_ERR, "Unable to execute %s", path);
140 default: /* Parent. */
144 wpid = waitpid(pid, &status, 0);
147 return (WEXITSTATUS(status));