diff options
Diffstat (limited to 'usr.sbin/mount_portalfs/pt_pipe.c')
| -rw-r--r-- | usr.sbin/mount_portalfs/pt_pipe.c | 229 |
1 files changed, 0 insertions, 229 deletions
diff --git a/usr.sbin/mount_portalfs/pt_pipe.c b/usr.sbin/mount_portalfs/pt_pipe.c deleted file mode 100644 index fd54b7e..0000000 --- a/usr.sbin/mount_portalfs/pt_pipe.c +++ /dev/null @@ -1,229 +0,0 @@ -/*- - * Copyright (C) 2005 Diomidis Spinellis. All rights reserved. - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * - * THIS SOFTWARE IS PROVIDED BY AUTHOR AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL AUTHOR OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - * - */ - -#include <sys/cdefs.h> -__FBSDID("$FreeBSD$"); - -#include <ctype.h> -#include <errno.h> -#include <fcntl.h> -#include <stdio.h> -#include <stdlib.h> -#include <string.h> -#include <unistd.h> - -#include <sys/types.h> -#include <sys/param.h> -#include <sys/syslog.h> - -#include "portald.h" - -/* Usage conventions for the pipe's endpoints. */ -#define READ_END 0 -#define WRITE_END 1 - -static int errlog(void); -static int parse_argv(char *args, char **argv); - -int portal_pipe(struct portal_cred *pcr, char *key, char **v, - int kso __unused, int *fdp) -{ - int fd[2]; /* Pipe endpoints. */ - int caller_end; /* The pipe end we will use. */ - int process_end; /* The pipe end the spawned process will use. */ - int redirect_fd; /* The fd to redirect on the spawned process. */ - char pbuf[MAXPATHLEN]; - int error = 0; - int i; - char **argv; - int argc; - struct portal_cred save_area; - - /* Validate open mode, and assign roles. */ - if ((pcr->pcr_flag & FWRITE) && (pcr->pcr_flag & FREAD)) - /* Don't allow both on a single fd. */ - return (EINVAL); - else if (pcr->pcr_flag & FREAD) { - /* - * The caller reads from the pipe, - * the spawned process writes to it. - */ - caller_end = READ_END; - process_end = WRITE_END; - redirect_fd = STDOUT_FILENO; - } else if (pcr->pcr_flag & FWRITE) { - /* - * The caller writes to the pipe, - * the spawned process reads from it. - */ - caller_end = WRITE_END; - process_end = READ_END; - redirect_fd = STDIN_FILENO; - } else - return (EINVAL); - - /* Get and check command line. */ - pbuf[0] = '/'; - strcpy(pbuf+1, key + (v[1] ? strlen(v[1]) : 0)); - argc = parse_argv(pbuf, NULL); - if (argc == 0) - return (ENOENT); - - /* Swap priviledges. */ - if (set_user_credentials(pcr, &save_area) < 0) - return (errno); - - /* Redirect and spawn the specified process. */ - fd[READ_END] = fd[WRITE_END] = -1; - if (pipe(fd) < 0) { - error = errno; - goto done; - } - switch (fork()) { - case -1: /* Error */ - error = errno; - break; - default: /* Parent */ - (void)close(fd[process_end]); - break; - case 0: /* Child */ - argv = (char **)malloc((argc + 1) * sizeof(char *)); - if (argv == 0) { - syslog(LOG_ALERT, - "malloc: failed to get space for %d pointers", - argc + 1); - exit(EXIT_FAILURE); - } - parse_argv(pbuf, argv); - - if (dup2(fd[process_end], redirect_fd) < 0) { - syslog(LOG_ERR, "dup2: %m"); - exit(EXIT_FAILURE); - } - (void)close(fd[caller_end]); - (void)close(fd[process_end]); - if (errlog() < 0) { - syslog(LOG_ERR, "errlog: %m"); - exit(EXIT_FAILURE); - } - if (execv(argv[0], argv) < 0) { - syslog(LOG_ERR, "execv(%s): %m", argv[0]); - exit(EXIT_FAILURE); - } - /* NOTREACHED */ - } - -done: - /* Re-establish our priviledges. */ - if (restore_credentials(&save_area) < 0) - error = errno; - - /* Set return fd value. */ - if (error == 0) - *fdp = fd[caller_end]; - else { - for (i = 0; i < 2; i++) - if (fd[i] >= 0) - (void)close(fd[i]); - *fdp = -1; - } - - return (error); -} - -/* - * Redirect stderr to the system log. - * Return 0 if ok. - * Return -1 with errno set on error. - */ -static int -errlog(void) -{ - int fd[2]; - char buff[1024]; - FILE *f; - int ret = 0; - - if (pipe(fd) < 0) - return (-1); - switch (fork()) { - case -1: /* Error */ - return (-1); - case 0: /* Child */ - if ((f = fdopen(fd[READ_END], "r")) == NULL) { - syslog(LOG_ERR, "fdopen: %m"); - exit(EXIT_FAILURE); - } - (void)close(fd[WRITE_END]); - while (fgets(buff, sizeof(buff), f) != NULL) - syslog(LOG_ERR, "exec: %s", buff); - exit(EXIT_SUCCESS); - /* NOTREACHED */ - default: /* Parent */ - if (dup2(fd[WRITE_END], STDERR_FILENO) < 0) - ret = -1; - (void)close(fd[READ_END]); - (void)close(fd[WRITE_END]); - break; - } - return (ret); -} - -/* - * Parse the args string as a space-separated argument vector. - * If argv is not NULL, split the string into its constituent - * components, and set argv to point to the beginning of each - * string component; NULL-terminating argv. - * Return the number of string components. - */ -static int -parse_argv(char *args, char **argv) -{ - int count = 0; - char *p; - enum {WORD, SPACE} state = SPACE; - - for (p = args; *p; p++) - switch (state) { - case WORD: - if (isspace(*p)) { - if (argv) - *p = '\0'; - state = SPACE; - } - break; - case SPACE: - if (!isspace(*p)) { - if (argv) - argv[count] = p; - count++; - state = WORD; - } - } - if (argv) - argv[count] = NULL; - return (count); -} |
