Merge branch 'master' of git+ssh://vda@busybox.net/var/lib/git/busybox

[platform/upstream/busybox.git] / util-linux / mdev.c

diff --git a/util-linux/mdev.c b/util-linux/mdev.c
index 17355bf..84e72e2 100644 (file)
--- a/util-linux/mdev.c
+++ b/util-linux/mdev.c
@@ -236,7 +236,6 @@ enum { OP_add, OP_remove };
 struct rule {
        bool keep_matching;
        bool regex_compiled;
-       bool regex_has_slash;
        mode_t mode;
        int maj, min0, min1;
        struct bb_uidgid_t ugid;
@@ -340,7 +339,6 @@ static void parse_next_rule(void)
                        }
                        xregcomp(&G.cur_rule.match, val, REG_EXTENDED);
                        G.cur_rule.regex_compiled = 1;
-                       G.cur_rule.regex_has_slash = (strchr(val, '/') != NULL);
                }
 
                /* 2nd field: uid:gid - device ownership */
@@ -467,11 +465,10 @@ static char *build_alias(char *alias, const char *device_name)
  */
 static void make_device(char *device_name, char *path, int operation)
 {
-       char *subsystem_slash_devname;
        int major, minor, type, len;
 
        if (G.verbose)
-               bb_error_msg("make_device: %s, %s, op:%d", device_name, path, operation);
+               bb_error_msg("device: %s, %s", device_name, path);
 
        /* Try to read major/minor string.  Note that the kernel puts \n after
         * the data, so we don't need to worry about null terminating the string
@@ -479,7 +476,7 @@ static void make_device(char *device_name, char *path, int operation)
         * We also depend on path having writeable space after it.
         */
        major = -1;
-       if (operation != OP_remove) {
+       if (operation == OP_add) {
                char *dev_maj_min = path + strlen(path);
 
                strcpy(dev_maj_min, "/dev");
@@ -490,7 +487,10 @@ static void make_device(char *device_name, char *path, int operation)
                                return;
                        /* no "dev" file, but we can still run scripts
                         * based on device name */
-               } else if (sscanf(++dev_maj_min, "%u:%u", &major, &minor) != 2) {
+               } else if (sscanf(++dev_maj_min, "%u:%u", &major, &minor) == 2) {
+                       if (G.verbose)
+                               bb_error_msg("maj,min: %u,%u", major, minor);
+               } else {
                        major = -1;
                }
        }
@@ -502,29 +502,12 @@ static void make_device(char *device_name, char *path, int operation)
        /* http://kernel.org/doc/pending/hotplug.txt says that only
         * "/sys/block/..." is for block devices. "/sys/bus" etc is not.
         * But since 2.6.25 block devices are also in /sys/class/block.
-        * We use strstr("/block/") to forestall future surprises. */
+        * We use strstr("/block/") to forestall future surprises.
+        */
        type = S_IFCHR;
        if (strstr(path, "/block/") || (G.subsystem && strncmp(G.subsystem, "block", 5) == 0))
                type = S_IFBLK;
 
-       /* Make path point to "subsystem/device_name" */
-       subsystem_slash_devname = NULL;
-       /* Check for coldplug invocations first */
-       if (strncmp(path, "/sys/block/", 11) == 0) /* legacy case */
-               path += sizeof("/sys/") - 1;
-       else if (strncmp(path, "/sys/class/", 11) == 0)
-               path += sizeof("/sys/class/") - 1;
-       else {
-               /* Example of a hotplug invocation:
-                * SUBSYSTEM="block"
-                * DEVPATH="/sys" + "/devices/virtual/mtd/mtd3/mtdblock3"
-                * ("/sys" is added by mdev_main)
-                * - path does not contain subsystem
-                */
-               subsystem_slash_devname = concat_path_file(G.subsystem, device_name);
-               path = subsystem_slash_devname;
-       }
-
 #if ENABLE_FEATURE_MDEV_CONF
        G.rule_idx = 0; /* restart from the beginning (think mdev -s) */
 #endif
@@ -537,7 +520,7 @@ static void make_device(char *device_name, char *path, int operation)
                char *node_name;
                const struct rule *rule;
 
-               str_to_match = "";
+               str_to_match = device_name;
 
                rule = next_rule();
 
@@ -555,12 +538,8 @@ static void make_device(char *device_name, char *path, int operation)
                        dbg("getenv('%s'):'%s'", rule->envvar, str_to_match);
                        if (!str_to_match)
                                continue;
-               } else {
-//TODO: $DEVNAME can have slashes too,
-// we should stop abusing '/' as a special syntax in our regex'es
-                       /* regex to match [subsystem/]device_name */
-                       str_to_match = (rule->regex_has_slash ? path : device_name);
                }
+               /* else: str_to_match = device_name */
 
                if (rule->regex_compiled) {
                        int regex_match = regexec(&rule->match, str_to_match, ARRAY_SIZE(off), off, 0);
@@ -669,12 +648,12 @@ static void make_device(char *device_name, char *path, int operation)
                                bb_error_msg("mknod: %s (%d,%d) %o", node_name, major, minor, rule->mode | type);
                        if (mknod(node_name, rule->mode | type, makedev(major, minor)) && errno != EEXIST)
                                bb_perror_msg("can't create '%s'", node_name);
-                       if (major == G.root_major && minor == G.root_minor)
-                               symlink(node_name, "root");
                        if (ENABLE_FEATURE_MDEV_CONF) {
                                chmod(node_name, rule->mode);
                                chown(node_name, rule->ugid.uid, rule->ugid.gid);
                        }
+                       if (major == G.root_major && minor == G.root_minor)
+                               symlink(node_name, "root");
                        if (ENABLE_FEATURE_MDEV_RENAME && alias) {
                                if (aliaslink == '>') {
 //TODO: on devtmpfs, device_name already exists and symlink() fails.
@@ -723,8 +702,6 @@ static void make_device(char *device_name, char *path, int operation)
                if (!ENABLE_FEATURE_MDEV_CONF || !rule->keep_matching)
                        break;
        } /* for (;;) */
-
-       free(subsystem_slash_devname);
 }
 
 /* File callback for /sys/ traversal */
@@ -890,13 +867,13 @@ int mdev_main(int argc UNUSED_PARAM, char **argv)
                 * DEVPATH is like "/block/sda" or "/class/input/mice"
                 */
                action = getenv("ACTION");
+               op = index_in_strings(keywords, action);
                env_devname = getenv("DEVNAME"); /* can be NULL */
                env_devpath = getenv("DEVPATH");
                G.subsystem = getenv("SUBSYSTEM");
                if (!action || !env_devpath /*|| !G.subsystem*/)
                        bb_show_usage();
                fw = getenv("FIRMWARE");
-               op = index_in_strings(keywords, action);
                /* If it exists, does /dev/mdev.seq match $SEQNUM?
                 * If it does not match, earlier mdev is running
                 * in parallel, and we need to wait */
@@ -927,7 +904,7 @@ int mdev_main(int argc UNUSED_PARAM, char **argv)
                        if (logfd >= 0) {
                                xmove_fd(logfd, STDERR_FILENO);
                                G.verbose = 1;
-                               bb_error_msg("pid: %u seq: %s action: %s", getpid(), seq, action);
+                               bb_error_msg("seq: %s action: %s", seq, action);
                        }
                }