/*
- * udev_lib - generic stuff used by udev
- *
- * Copyright (C) 2004 Kay Sievers <kay@vrfy.org>
+ * Copyright (C) 2004-2005 Kay Sievers <kay.sievers@vrfy.org>
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
*
* 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 <ctype.h>
#include <dirent.h>
#include <syslog.h>
-#include <sys/wait.h>
-#include <sys/stat.h>
-#include <sys/mman.h>
+#include <pwd.h>
+#include <grp.h>
+#include <sys/types.h>
#include <sys/utsname.h>
-#include "udev_libc_wrapper.h"
#include "udev.h"
-#include "logging.h"
-#include "udev_utils.h"
-#include "list.h"
-
-
-int udev_init_device(struct udevice *udev, const char* devpath, const char *subsystem, const char *action)
-{
- char *pos;
-
- memset(udev, 0x00, sizeof(struct udevice));
- INIT_LIST_HEAD(&udev->symlink_list);
- INIT_LIST_HEAD(&udev->run_list);
- INIT_LIST_HEAD(&udev->env_list);
-
- if (subsystem)
- strlcpy(udev->subsystem, subsystem, sizeof(udev->subsystem));
-
- if (action)
- strlcpy(udev->action, action, sizeof(udev->action));
-
- if (devpath) {
- strlcpy(udev->devpath, devpath, sizeof(udev->devpath));
- remove_trailing_char(udev->devpath, '/');
-
- if (strncmp(udev->devpath, "/block/", 7) == 0)
- udev->type = DEV_BLOCK;
- else if (strncmp(udev->devpath, "/class/net/", 11) == 0)
- udev->type = DEV_NET;
- else if (strncmp(udev->devpath, "/class/", 7) == 0)
- udev->type = DEV_CLASS;
- else if (strncmp(udev->devpath, "/devices/", 9) == 0)
- udev->type = DEV_DEVICE;
-
- /* get kernel name */
- pos = strrchr(udev->devpath, '/');
- if (pos) {
- strlcpy(udev->kernel_name, &pos[1], sizeof(udev->kernel_name));
- dbg("kernel_name='%s'", udev->kernel_name);
-
- /* Some block devices have '!' in their name, change that to '/' */
- pos = udev->kernel_name;
- while (pos[0] != '\0') {
- if (pos[0] == '!')
- pos[0] = '/';
- pos++;
- }
-
- /* get kernel number */
- pos = &udev->kernel_name[strlen(udev->kernel_name)];
- while (isdigit(pos[-1]))
- pos--;
- strlcpy(udev->kernel_number, pos, sizeof(udev->kernel_number));
- dbg("kernel_number='%s'", udev->kernel_number);
- }
- }
-
- if (udev->type == DEV_BLOCK || udev->type == DEV_CLASS) {
- udev->mode = 0660;
- strcpy(udev->owner, "root");
- strcpy(udev->group, "root");
- }
-
- return 0;
-}
-
-void udev_cleanup_device(struct udevice *udev)
-{
- struct name_entry *name_loop;
- struct name_entry *temp_loop;
-
- list_for_each_entry_safe(name_loop, temp_loop, &udev->symlink_list, node) {
- list_del(&name_loop->node);
- free(name_loop);
- }
- list_for_each_entry_safe(name_loop, temp_loop, &udev->run_list, node) {
- list_del(&name_loop->node);
- free(name_loop);
- }
- list_for_each_entry_safe(name_loop, temp_loop, &udev->env_list, node) {
- list_del(&name_loop->node);
- free(name_loop);
- }
-}
-int string_is_true(const char *str)
-{
- if (strcasecmp(str, "true") == 0)
- return 1;
- if (strcasecmp(str, "yes") == 0)
- return 1;
- if (strcasecmp(str, "1") == 0)
- return 1;
- return 0;
-}
int log_priority(const char *priority)
{
return 0;
}
-int kernel_release_satisfactory(unsigned int version, unsigned int patchlevel, unsigned int sublevel)
-{
- static unsigned int kversion = 0;
- static unsigned int kpatchlevel;
- static unsigned int ksublevel;
-
- if (kversion == 0) {
- struct utsname uts;
- if (uname(&uts) != 0)
- return -1;
-
- if (sscanf (uts.release, "%u.%u.%u", &kversion, &kpatchlevel, &ksublevel) != 3) {
- kversion = 0;
- return -1;
- }
- }
-
- if (kversion >= version && kpatchlevel >= patchlevel && ksublevel >= sublevel)
- return 1;
- else
- return 0;
-}
-
-int create_path(const char *path)
-{
- char p[PATH_SIZE];
- char *pos;
- struct stat stats;
-
- strcpy (p, path);
- pos = strrchr(p, '/');
- if (pos == p || pos == NULL)
- return 0;
-
- while (pos[-1] == '/')
- pos--;
-
- pos[0] = '\0';
-
- dbg("stat '%s'\n", p);
- if (stat (p, &stats) == 0 && (stats.st_mode & S_IFMT) == S_IFDIR)
- return 0;
-
- if (create_path (p) != 0)
- return -1;
-
- dbg("mkdir '%s'\n", p);
- return mkdir(p, 0755);
-}
-
-/* Reset permissions on the device node, before unlinking it to make sure,
- * that permisions of possible hard links will be removed too.
- */
-int unlink_secure(const char *filename)
-{
- int retval;
-
- retval = chown(filename, 0, 0);
- if (retval)
- dbg("chown(%s, 0, 0) failed with error '%s'", filename, strerror(errno));
-
- retval = chmod(filename, 0000);
- if (retval)
- dbg("chmod(%s, 0000) failed with error '%s'", filename, strerror(errno));
-
- retval = unlink(filename);
- if (errno == ENOENT)
- retval = 0;
-
- if (retval)
- dbg("unlink(%s) failed with error '%s'", filename, strerror(errno));
-
- return retval;
-}
-
-int file_map(const char *filename, char **buf, size_t *bufsize)
+struct name_entry *name_list_add(struct list_head *name_list, const char *name, int sort)
{
- struct stat stats;
- int fd;
-
- fd = open(filename, O_RDONLY);
- if (fd < 0) {
- return -1;
- }
-
- if (fstat(fd, &stats) < 0) {
- close(fd);
- return -1;
- }
+ struct name_entry *name_loop;
+ struct name_entry *name_new;
- *buf = mmap(NULL, stats.st_size, PROT_READ, MAP_SHARED, fd, 0);
- if (*buf == MAP_FAILED) {
- close(fd);
- return -1;
+ /* avoid duplicate entries */
+ list_for_each_entry(name_loop, name_list, node) {
+ if (strcmp(name_loop->name, name) == 0) {
+ dbg("'%s' is already in the list\n", name);
+ return name_loop;
+ }
}
- *bufsize = stats.st_size;
-
- close(fd);
- return 0;
-}
-
-void file_unmap(void *buf, size_t bufsize)
-{
- munmap(buf, bufsize);
-}
-
-/* return number of chars until the next newline, skip escaped newline */
-size_t buf_get_line(const char *buf, size_t buflen, size_t cur)
-{
- int escape = 0;
- size_t count;
+ if (sort)
+ list_for_each_entry(name_loop, name_list, node) {
+ if (strcmp(name_loop->name, name) > 0)
+ break;
+ }
- for (count = cur; count < buflen; count++) {
- if (!escape && buf[count] == '\n')
- break;
+ name_new = malloc(sizeof(struct name_entry));
+ if (name_new == NULL)
+ return NULL;
- if (buf[count] == '\\')
- escape = 1;
- else
- escape = 0;
- }
+ strlcpy(name_new->name, name, sizeof(name_new->name));
+ dbg("adding '%s'\n", name_new->name);
+ list_add_tail(&name_new->node, &name_loop->node);
- return count - cur;
+ return name_new;
}
-void replace_untrusted_chars(char *string)
+struct name_entry *name_list_key_add(struct list_head *name_list, const char *key, const char *value)
{
- size_t len;
-
- for (len = 0; string[len] != '\0'; len++) {
- if (strchr(";,~\\()\'", string[len])) {
- info("replace '%c' in '%s'", string[len], string);
- string[len] = '_';
+ struct name_entry *name_loop;
+ struct name_entry *name_new;
+
+ list_for_each_entry(name_loop, name_list, node) {
+ if (strncmp(name_loop->name, key, strlen(key)) == 0) {
+ dbg("key already present '%s', replace it\n", name_loop->name);
+ snprintf(name_loop->name, sizeof(name_loop->name), "%s=%s", key, value);
+ name_loop->name[sizeof(name_loop->name)-1] = '\0';
+ return name_loop;
}
}
-}
-void remove_trailing_char(char *path, char c)
-{
- size_t len;
+ name_new = malloc(sizeof(struct name_entry));
+ if (name_new == NULL)
+ return NULL;
+
+ snprintf(name_new->name, sizeof(name_new->name), "%s=%s", key, value);
+ name_new->name[sizeof(name_new->name)-1] = '\0';
+ dbg("adding '%s'\n", name_new->name);
+ list_add_tail(&name_new->node, &name_loop->node);
- len = strlen(path);
- while (len > 0 && path[len-1] == c)
- path[--len] = '\0';
+ return name_new;
}
-int name_list_add(struct list_head *name_list, const char *name, int sort)
+int name_list_key_remove(struct list_head *name_list, const char *key)
{
- struct name_entry *loop_name;
- struct name_entry *new_name;
-
- list_for_each_entry(loop_name, name_list, node) {
- /* avoid doubles */
- if (strcmp(loop_name->name, name) == 0) {
- dbg("'%s' is already in the list", name);
- return 0;
- }
- }
-
- if (sort)
- list_for_each_entry(loop_name, name_list, node) {
- if (sort && strcmp(loop_name->name, name) > 0)
- break;
- }
+ struct name_entry *name_loop;
+ struct name_entry *name_tmp;
+ size_t keylen = strlen(key);
+ int retval = 0;
- new_name = malloc(sizeof(struct name_entry));
- if (new_name == NULL) {
- dbg("error malloc");
- return -ENOMEM;
+ list_for_each_entry_safe(name_loop, name_tmp, name_list, node) {
+ if (strncmp(name_loop->name, key, keylen) != 0)
+ continue;
+ if (name_loop->name[keylen] != '=')
+ continue;
+ list_del(&name_loop->node);
+ free(name_loop);
+ retval = 1;
+ break;
}
-
- strlcpy(new_name->name, name, sizeof(new_name->name));
- dbg("adding '%s'", new_name->name);
- list_add_tail(&new_name->node, &loop_name->node);
-
- return 0;
+ return retval;
}
-int name_list_key_add(struct list_head *name_list, const char *key, const char *value)
+void name_list_cleanup(struct list_head *name_list)
{
- struct name_entry *loop_name;
- struct name_entry *new_name;
-
- list_for_each_entry(loop_name, name_list, node) {
- if (strncmp(loop_name->name, key, strlen(key)) == 0) {
- dbg("key already present '%s', replace it", loop_name->name);
- snprintf(loop_name->name, sizeof(loop_name->name), "%s=%s", key, value);
- loop_name->name[sizeof(loop_name->name)-1] = '\0';
- return 0;
- }
- }
+ struct name_entry *name_loop;
+ struct name_entry *name_tmp;
- new_name = malloc(sizeof(struct name_entry));
- if (new_name == NULL) {
- dbg("error malloc");
- return -ENOMEM;
+ list_for_each_entry_safe(name_loop, name_tmp, name_list, node) {
+ list_del(&name_loop->node);
+ free(name_loop);
}
-
- snprintf(new_name->name, sizeof(new_name->name), "%s=%s", key, value);
- new_name->name[sizeof(new_name->name)-1] = '\0';
- dbg("adding '%s'", new_name->name);
- list_add_tail(&new_name->node, &loop_name->node);
-
- return 0;
}
/* calls function for every file found in specified directory */
{
struct dirent *ent;
DIR *dir;
- char *ext;
char filename[PATH_SIZE];
- dbg("open directory '%s'", dirname);
+ dbg("open directory '%s'\n", dirname);
dir = opendir(dirname);
if (dir == NULL) {
- dbg("unable to open '%s'", dirname);
+ err("unable to open '%s': %s\n", dirname, strerror(errno));
return -1;
}
continue;
/* look for file matching with specified suffix */
- ext = strrchr(ent->d_name, '.');
- if (ext == NULL)
- continue;
-
- if (strcmp(ext, suffix) != 0)
- continue;
-
- dbg("put file '%s/%s' in list", dirname, ent->d_name);
+ if (suffix != NULL) {
+ const char *ext;
+
+ ext = strrchr(ent->d_name, '.');
+ if (ext == NULL)
+ continue;
+ if (strcmp(ext, suffix) != 0)
+ continue;
+ }
+ dbg("put file '%s/%s' into list\n", dirname, ent->d_name);
snprintf(filename, sizeof(filename), "%s/%s", dirname, ent->d_name);
filename[sizeof(filename)-1] = '\0';
return 0;
}
-int execute_program(const char *command, const char *subsystem,
- char *result, size_t ressize, size_t *reslen)
+uid_t lookup_user(const char *user)
{
- int retval = 0;
- int count;
- int status;
- int pipefds[2];
- pid_t pid;
- char *pos;
- char arg[PATH_SIZE];
- char *argv[(sizeof(arg) / 2) + 1];
- int devnull;
- int i;
- size_t len;
-
- strlcpy(arg, command, sizeof(arg));
- i = 0;
- if (strchr(arg, ' ')) {
- pos = arg;
- while (pos != NULL) {
- if (pos[0] == '\'') {
- /* don't separate if in apostrophes */
- pos++;
- argv[i] = strsep(&pos, "\'");
- while (pos && pos[0] == ' ')
- pos++;
- } else {
- argv[i] = strsep(&pos, " ");
- }
- dbg("arg[%i] '%s'", i, argv[i]);
- i++;
- }
- argv[i] = NULL;
- dbg("execute '%s' with parsed arguments", arg);
- } else {
- argv[0] = arg;
- argv[1] = (char *) subsystem;
- argv[2] = NULL;
- dbg("execute '%s' with subsystem '%s' argument", arg, argv[1]);
- }
+ struct passwd *pw;
+ uid_t uid = 0;
- if (result) {
- if (pipe(pipefds) != 0) {
- err("pipe failed");
- return -1;
- }
- }
+ errno = 0;
+ pw = getpwnam(user);
+ if (pw == NULL) {
+ if (errno == 0 || errno == ENOENT || errno == ESRCH)
+ err("specified user '%s' unknown\n", user);
+ else
+ err("error resolving user '%s': %s\n", user, strerror(errno));
+ } else
+ uid = pw->pw_uid;
- pid = fork();
- switch(pid) {
- case 0:
- /* child dup2 write side of pipe to STDOUT */
- devnull = open("/dev/null", O_RDWR);
- if (devnull >= 0) {
- dup2(devnull, STDIN_FILENO);
- if (!result)
- dup2(devnull, STDOUT_FILENO);
- dup2(devnull, STDERR_FILENO);
- close(devnull);
- }
- if (result)
- dup2(pipefds[1], STDOUT_FILENO);
- execv(arg, argv);
- err("exec of program failed");
- _exit(1);
- case -1:
- err("fork of '%s' failed", arg);
- return -1;
- default:
- /* parent reads from pipefds[0] */
- if (result) {
- close(pipefds[1]);
- len = 0;
- while (1) {
- count = read(pipefds[0], result + len, ressize - len-1);
- if (count < 0) {
- err("read failed with '%s'", strerror(errno));
- retval = -1;
- break;
- }
-
- if (count == 0)
- break;
-
- len += count;
- if (len >= ressize-1) {
- err("ressize %ld too short", (long)ressize);
- retval = -1;
- break;
- }
- }
- result[len] = '\0';
- close(pipefds[0]);
- if (reslen)
- *reslen = len;
- }
- waitpid(pid, &status, 0);
+ return uid;
+}
- if (!WIFEXITED(status) || (WEXITSTATUS(status) != 0)) {
- dbg("exec program status 0x%x", status);
- retval = -1;
- }
- }
+extern gid_t lookup_group(const char *group)
+{
+ struct group *gr;
+ gid_t gid = 0;
- return retval;
+ errno = 0;
+ gr = getgrnam(group);
+ if (gr == NULL) {
+ if (errno == 0 || errno == ENOENT || errno == ESRCH)
+ err("specified group '%s' unknown\n", group);
+ else
+ err("error resolving group '%s': %s\n", group, strerror(errno));
+ } else
+ gid = gr->gr_gid;
+
+ return gid;
}
+
~ianmdlvl / elogind.git / blobdiff