/*
- * udev_utils_run.c - execute programs from udev and read its output
- *
* Copyright (C) 2004-2005 Kay Sievers <kay.sievers@vrfy.org>
*
* This program is free software; you can redistribute it and/or modify it
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
- * 675 Mass Ave, Cambridge, MA 02139, USA.
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*
*/
#include <sys/wait.h>
#include <sys/select.h>
-#include "udev_libc_wrapper.h"
#include "udev.h"
-#include "logging.h"
-#include "udev_utils.h"
-#include "list.h"
+extern char **environ;
int pass_env_to_socket(const char *sockname, const char *devpath, const char *action)
{
sock = socket(AF_LOCAL, SOCK_DGRAM, 0);
memset(&saddr, 0x00, sizeof(struct sockaddr_un));
saddr.sun_family = AF_LOCAL;
- /* only abstract namespace is supported */
+ /* abstract namespace only */
strcpy(&saddr.sun_path[1], sockname);
addrlen = offsetof(struct sockaddr_un, sun_path) + strlen(saddr.sun_path+1) + 1;
int errpipe[2] = {-1, -1};
pid_t pid;
char arg[PATH_SIZE];
+ char program[PATH_SIZE];
char *argv[(sizeof(arg) / 2) + 1];
int devnull;
int i;
+ /* build argv from comand */
strlcpy(arg, command, sizeof(arg));
i = 0;
- if (strchr(arg, ' ')) {
+ if (strchr(arg, ' ') != NULL) {
char *pos = arg;
+
while (pos != NULL) {
if (pos[0] == '\'') {
/* don't separate if in apostrophes */
pos++;
argv[i] = strsep(&pos, "\'");
- while (pos && pos[0] == ' ')
+ while (pos != NULL && pos[0] == ' ')
pos++;
} else {
argv[i] = strsep(&pos, " ");
i++;
}
argv[i] = NULL;
- info("'%s'", command);
} else {
argv[0] = arg;
- argv[1] = (char *) subsystem;
- argv[2] = NULL;
- info("'%s' '%s'", arg, argv[1]);
+ argv[1] = NULL;
}
+ info("'%s'", command);
/* prepare pipes from child to parent */
if (result || log) {
if (pipe(outpipe) != 0) {
- err("pipe failed");
+ err("pipe failed: %s", strerror(errno));
return -1;
}
}
if (log) {
if (pipe(errpipe) != 0) {
- err("pipe failed");
+ err("pipe failed: %s", strerror(errno));
return -1;
}
}
+ /* allow programs in /lib/udev called without the path */
+ if (strchr(argv[0], '/') == NULL) {
+ strlcpy(program, "/lib/udev/", sizeof(program));
+ strlcat(program, argv[0], sizeof(program));
+ argv[0] = program;
+ }
+
pid = fork();
switch(pid) {
case 0:
/* child closes parent ends of pipes */
- if (outpipe[0] > 0)
- close(outpipe[0]);
- if (errpipe[0] > 0)
- close(errpipe[0]);
+ if (outpipe[READ_END] > 0)
+ close(outpipe[READ_END]);
+ if (errpipe[READ_END] > 0)
+ close(errpipe[READ_END]);
/* discard child output or connect to pipe */
devnull = open("/dev/null", O_RDWR);
if (devnull > 0) {
dup2(devnull, STDIN_FILENO);
- if (outpipe[1] < 0)
+ if (outpipe[WRITE_END] < 0)
dup2(devnull, STDOUT_FILENO);
- if (errpipe[1] < 0)
+ if (errpipe[WRITE_END] < 0)
dup2(devnull, STDERR_FILENO);
close(devnull);
} else
- err("open /dev/null failed");
- if (outpipe[1] > 0)
- dup2(outpipe[1], STDOUT_FILENO);
- if (errpipe[1] > 0)
- dup2(errpipe[1], STDERR_FILENO);
+ err("open /dev/null failed: %s", strerror(errno));
+ if (outpipe[WRITE_END] > 0) {
+ dup2(outpipe[WRITE_END], STDOUT_FILENO);
+ close(outpipe[WRITE_END]);
+ }
+ if (errpipe[WRITE_END] > 0) {
+ dup2(errpipe[WRITE_END], STDERR_FILENO);
+ close(errpipe[WRITE_END]);
+ }
execv(argv[0], argv);
/* we should never reach this */
- err("exec of program failed");
+ err("exec of program '%s' failed", argv[0]);
_exit(1);
case -1:
- err("fork of '%s' failed", argv[0]);
+ err("fork of '%s' failed: %s", argv[0], strerror(errno));
return -1;
default:
/* read from child if requested */
- if (outpipe[0] > 0 || errpipe[0] > 0) {
+ if (outpipe[READ_END] > 0 || errpipe[READ_END] > 0) {
ssize_t count;
size_t respos = 0;
/* parent closes child ends of pipes */
- if (outpipe[1] > 0)
- close(outpipe[1]);
- if (errpipe[1] > 0)
- close(errpipe[1]);
+ if (outpipe[WRITE_END] > 0)
+ close(outpipe[WRITE_END]);
+ if (errpipe[WRITE_END] > 0)
+ close(errpipe[WRITE_END]);
/* read child output */
- while (outpipe[0] > 0 || errpipe[0] > 0) {
+ while (outpipe[READ_END] > 0 || errpipe[READ_END] > 0) {
int fdcount;
fd_set readfds;
FD_ZERO(&readfds);
- if (outpipe[0] > 0)
- FD_SET(outpipe[0], &readfds);
- if (errpipe[0] > 0)
- FD_SET(errpipe[0], &readfds);
- fdcount = select(UDEV_MAX(outpipe[0], errpipe[0])+1, &readfds, NULL, NULL, NULL);
+ if (outpipe[READ_END] > 0)
+ FD_SET(outpipe[READ_END], &readfds);
+ if (errpipe[READ_END] > 0)
+ FD_SET(errpipe[READ_END], &readfds);
+ fdcount = select(UDEV_MAX(outpipe[READ_END], errpipe[READ_END])+1, &readfds, NULL, NULL, NULL);
if (fdcount < 0) {
if (errno == EINTR)
continue;
}
/* get stdout */
- if (outpipe[0] > 0 && FD_ISSET(outpipe[0], &readfds)) {
+ if (outpipe[READ_END] > 0 && FD_ISSET(outpipe[READ_END], &readfds)) {
char inbuf[1024];
char *pos;
char *line;
- count = read(outpipe[0], inbuf, sizeof(inbuf)-1);
+ count = read(outpipe[READ_END], inbuf, sizeof(inbuf)-1);
if (count <= 0) {
- close(outpipe[0]);
- outpipe[0] = -1;
+ close(outpipe[READ_END]);
+ outpipe[READ_END] = -1;
if (count < 0) {
- err("stdin read failed with '%s'", strerror(errno));
+ err("stdin read failed: %s", strerror(errno));
retval = -1;
}
continue;
}
/* get stderr */
- if (errpipe[0] > 0 && FD_ISSET(errpipe[0], &readfds)) {
+ if (errpipe[READ_END] > 0 && FD_ISSET(errpipe[READ_END], &readfds)) {
char errbuf[1024];
char *pos;
char *line;
- count = read(errpipe[0], errbuf, sizeof(errbuf)-1);
+ count = read(errpipe[READ_END], errbuf, sizeof(errbuf)-1);
if (count <= 0) {
- close(errpipe[0]);
- errpipe[0] = -1;
+ close(errpipe[READ_END]);
+ errpipe[READ_END] = -1;
if (count < 0)
- err("stderr read failed with '%s'", strerror(errno));
+ err("stderr read failed: %s", strerror(errno));
continue;
}
errbuf[count] = '\0';
info("'%s' (stderr) '%s'", argv[0], line);
}
}
- if (outpipe[0] > 0)
- close(outpipe[0]);
- if (errpipe[0] > 0)
- close(errpipe[0]);
+ if (outpipe[READ_END] > 0)
+ close(outpipe[READ_END]);
+ if (errpipe[READ_END] > 0)
+ close(errpipe[READ_END]);
/* return the childs stdout string */
if (result) {