X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=blobdiff_plain;f=udev_utils.c;h=00b67dadc6fa3ff0a70b97df098a1cbbe2ad64d3;hp=073cde1074f921ef920a44aeddb5aa5fb2189875;hb=661a0bea80d129d5df708e36dbaed745c9d8392e;hpb=aaff09a30ab849186c0d4ad8bde83876d7a1a63d

diff --git a/udev_utils.c b/udev_utils.c
index 073cde107..00b67dadc 100644
--- a/udev_utils.c
+++ b/udev_utils.c
@@ -1,7 +1,5 @@
 /*
- * 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
@@ -14,7 +12,7 @@
  * 
  *	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.
  *
  */
 
@@ -28,107 +26,13 @@
 #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)
 {
@@ -150,211 +54,91 @@ 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 */
@@ -362,13 +146,12 @@ int add_matching_files(struct list_head *name_list, const char *dirname, const c
 {
 	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;
 	}
 
@@ -381,14 +164,16 @@ int add_matching_files(struct list_head *name_list, const char *dirname, const c
 			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';
@@ -399,109 +184,39 @@ int add_matching_files(struct list_head *name_list, const char *dirname, const c
 	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;
 }
+