#include <errno.h>
#include <syslog.h>
#include <fnmatch.h>
+#include <sys/socket.h>
+#include <sys/un.h>
#include <sys/wait.h>
#include <sys/stat.h>
#include "udev.h"
#include "udev_rules.h"
+extern char **environ;
/* extract possible {attr} and move str behind it */
static char *get_format_attribute(char **str)
return 0;
}
+static int run_program(const char *command, const char *subsystem,
+ char *result, size_t ressize, size_t *reslen)
+{
+ int status;
+ int outpipe[2] = {-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;
+ int retval = 0;
+
+ /* build argv from comand */
+ strlcpy(arg, command, sizeof(arg));
+ i = 0;
+ 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 != NULL && pos[0] == ' ')
+ pos++;
+ } else {
+ argv[i] = strsep(&pos, " ");
+ }
+ dbg("arg[%i] '%s'", i, argv[i]);
+ i++;
+ }
+ argv[i] = NULL;
+ } else {
+ argv[0] = arg;
+ argv[1] = NULL;
+ }
+ info("'%s'", command);
+
+ /* prepare pipes from child to parent */
+ if (result != NULL || udev_log_priority >= LOG_INFO) {
+ if (pipe(outpipe) != 0) {
+ err("pipe failed: %s", strerror(errno));
+ return -1;
+ }
+ }
+ if (udev_log_priority >= LOG_INFO) {
+ if (pipe(errpipe) != 0) {
+ 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[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[WRITE_END] < 0)
+ dup2(devnull, STDOUT_FILENO);
+ if (errpipe[WRITE_END] < 0)
+ dup2(devnull, STDERR_FILENO);
+ close(devnull);
+ } else
+ 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);
+ if (errno == ENOENT || errno == ENOTDIR) {
+ /* may be on a filesytem which is not mounted right now */
+ info("program '%s' not found", argv[0]);
+ } else {
+ /* other problems */
+ err("exec of program '%s' failed", argv[0]);
+ }
+ _exit(1);
+ case -1:
+ err("fork of '%s' failed: %s", argv[0], strerror(errno));
+ return -1;
+ default:
+ /* read from child if requested */
+ if (outpipe[READ_END] > 0 || errpipe[READ_END] > 0) {
+ ssize_t count;
+ size_t respos = 0;
+
+ /* parent closes child ends of pipes */
+ if (outpipe[WRITE_END] > 0)
+ close(outpipe[WRITE_END]);
+ if (errpipe[WRITE_END] > 0)
+ close(errpipe[WRITE_END]);
+
+ /* read child output */
+ while (outpipe[READ_END] > 0 || errpipe[READ_END] > 0) {
+ int fdcount;
+ fd_set readfds;
+
+ FD_ZERO(&readfds);
+ 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;
+ retval = -1;
+ break;
+ }
+
+ /* get stdout */
+ if (outpipe[READ_END] > 0 && FD_ISSET(outpipe[READ_END], &readfds)) {
+ char inbuf[1024];
+ char *pos;
+ char *line;
+
+ count = read(outpipe[READ_END], inbuf, sizeof(inbuf)-1);
+ if (count <= 0) {
+ close(outpipe[READ_END]);
+ outpipe[READ_END] = -1;
+ if (count < 0) {
+ err("stdin read failed: %s", strerror(errno));
+ retval = -1;
+ }
+ continue;
+ }
+ inbuf[count] = '\0';
+
+ /* store result for rule processing */
+ if (result) {
+ if (respos + count < ressize) {
+ memcpy(&result[respos], inbuf, count);
+ respos += count;
+ } else {
+ err("ressize %ld too short", (long)ressize);
+ retval = -1;
+ }
+ }
+ pos = inbuf;
+ while ((line = strsep(&pos, "\n")))
+ if (pos || line[0] != '\0')
+ info("'%s' (stdout) '%s'", argv[0], line);
+ }
+
+ /* get stderr */
+ if (errpipe[READ_END] > 0 && FD_ISSET(errpipe[READ_END], &readfds)) {
+ char errbuf[1024];
+ char *pos;
+ char *line;
+
+ count = read(errpipe[READ_END], errbuf, sizeof(errbuf)-1);
+ if (count <= 0) {
+ close(errpipe[READ_END]);
+ errpipe[READ_END] = -1;
+ if (count < 0)
+ err("stderr read failed: %s", strerror(errno));
+ continue;
+ }
+ errbuf[count] = '\0';
+ pos = errbuf;
+ while ((line = strsep(&pos, "\n")))
+ if (pos || line[0] != '\0')
+ info("'%s' (stderr) '%s'", argv[0], line);
+ }
+ }
+ 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) {
+ result[respos] = '\0';
+ dbg("result='%s'", result);
+ if (reslen)
+ *reslen = respos;
+ }
+ }
+ waitpid(pid, &status, 0);
+ if (WIFEXITED(status)) {
+ info("'%s' returned with status %i", argv[0], WEXITSTATUS(status));
+ if (WEXITSTATUS(status) != 0)
+ retval = -1;
+ } else {
+ err("'%s' abnormal exit", argv[0]);
+ retval = -1;
+ }
+ }
+
+ return retval;
+}
+
static int import_keys_into_env(struct udevice *udev, const char *buf, size_t bufsize)
{
char line[LINE_SIZE];
return rc;
}
+static int pass_env_to_socket(const char *sockname, const char *devpath, const char *action)
+{
+ int sock;
+ struct sockaddr_un saddr;
+ socklen_t addrlen;
+ char buf[2048];
+ size_t bufpos = 0;
+ int i;
+ ssize_t count;
+ int retval = 0;
+
+ dbg("pass environment to socket '%s'", sockname);
+ sock = socket(AF_LOCAL, SOCK_DGRAM, 0);
+ memset(&saddr, 0x00, sizeof(struct sockaddr_un));
+ saddr.sun_family = AF_LOCAL;
+ /* abstract namespace only */
+ strcpy(&saddr.sun_path[1], sockname);
+ addrlen = offsetof(struct sockaddr_un, sun_path) + strlen(saddr.sun_path+1) + 1;
+
+ bufpos = snprintf(buf, sizeof(buf)-1, "%s@%s", action, devpath);
+ bufpos++;
+ for (i = 0; environ[i] != NULL && bufpos < sizeof(buf); i++) {
+ bufpos += strlcpy(&buf[bufpos], environ[i], sizeof(buf) - bufpos-1);
+ bufpos++;
+ }
+
+ count = sendto(sock, &buf, bufpos, 0, (struct sockaddr *)&saddr, addrlen);
+ if (count < 0)
+ retval = -1;
+ info("passed %zi bytes to socket '%s', ", count, sockname);
+
+ close(sock);
+ return retval;
+}
+
+int udev_rules_run(struct udevice *udev)
+{
+ struct name_entry *name_loop;
+ int retval = 0;
+
+ dbg("executing run list");
+ list_for_each_entry(name_loop, &udev->run_list, node) {
+ if (strncmp(name_loop->name, "socket:", strlen("socket:")) == 0) {
+ pass_env_to_socket(&name_loop->name[strlen("socket:")], udev->dev->devpath, udev->action);
+ } else {
+ char program[PATH_SIZE];
+
+ strlcpy(program, name_loop->name, sizeof(program));
+ udev_rules_apply_format(udev, program, sizeof(program));
+ if (run_program(program, udev->dev->subsystem, NULL, 0, NULL) != 0)
+ if (!name_loop->ignore_error)
+ retval = -1;
+ }
+ }
+
+ return retval;
+}
+
#define WAIT_LOOP_PER_SECOND 50
static int wait_for_sysfs(struct udevice *udev, const char *file, int timeout)
{
if (match_key("DRIVER", rule, &rule->driver, udev->dev->driver))
goto nomatch;
- /* match NAME against a value assigned by an earlier rule */
if (match_key("NAME", rule, &rule->name, udev->name))
goto nomatch;
+ /* match against current list of symlinks */
+ if (rule->symlink_match.operation == KEY_OP_MATCH ||
+ rule->symlink_match.operation == KEY_OP_NOMATCH) {
+ struct name_entry *name_loop;
+ int match = 0;
+
+ list_for_each_entry(name_loop, &udev->symlink_list, node) {
+ if (match_key("SYMLINK", rule, &rule->symlink_match, name_loop->name) == 0) {
+ match = 1;
+ break;
+ }
+ }
+ if (!match)
+ goto nomatch;
+ }
+
for (i = 0; i < rule->env.count; i++) {
struct key_pair *pair = &rule->env.keys[i];
dbg("udev->dev->devpath='%s'", udev->dev->devpath);
dbg("udev->dev->kernel='%s'", udev->dev->kernel);
+ /* use kernel name as default node name */
+ strlcpy(udev->name, udev->dev->kernel, sizeof(udev->name));
+
/* look for a matching rule to apply */
udev_rules_iter_init(rules);
while (1) {
}
/* collect symlinks */
- if (!udev->symlink_final && rule->symlink.operation != KEY_OP_UNSET) {
+ if (!udev->symlink_final &&
+ (rule->symlink.operation == KEY_OP_ASSIGN ||
+ rule->symlink.operation == KEY_OP_ASSIGN_FINAL ||
+ rule->symlink.operation == KEY_OP_ADD)) {
char temp[PATH_SIZE];
char *pos, *next;
int count;
if (rule->symlink.operation == KEY_OP_ASSIGN_FINAL)
udev->symlink_final = 1;
- if (rule->symlink.operation == KEY_OP_ASSIGN || rule->symlink.operation == KEY_OP_ASSIGN_FINAL) {
+ if (rule->symlink.operation == KEY_OP_ASSIGN ||
+ rule->symlink.operation == KEY_OP_ASSIGN_FINAL) {
info("reset symlink list");
name_list_cleanup(&udev->symlink_list);
}
}
}
- if (!name_set) {
- strlcpy(udev->name, udev->dev->kernel, sizeof(udev->name));
+ if (!name_set)
info("no node name set, will use kernel name '%s'", udev->name);
- }
if (udev->tmp_node[0] != '\0') {
dbg("removing temporary device node");
~ianmdlvl / elogind.git / blobdiff