udev: use startswith() and streq()

17 files changed, 135 insertions, 134 deletions

diff --git a/src/libudev/libudev-device-private.c b/src/libudev/libudev-device-private.c
index c58cde2ff6..a4dfa9bd39 100644
--- a/src/libudev/libudev-device-private.c
+++ b/src/libudev/libudev-device-private.c
@@ -60,7 +60,7 @@ int udev_device_tag_index(struct udev_device *dev, struct udev_device *dev_old,
                         udev_list_entry_foreach(list_entry_current, udev_device_get_tags_list_entry(dev)) {
                                 const char *tag = udev_list_entry_get_name(list_entry_current);
 
-                                if (strcmp(tag, tag_old) == 0) {
+                                if (streq(tag, tag_old)) {
                                         found = true;
                                         break;
                                 }
diff --git a/src/libudev/libudev-device.c b/src/libudev/libudev-device.c
index 212163bb92..6a2b1d039a 100644
--- a/src/libudev/libudev-device.c
+++ b/src/libudev/libudev-device.c
@@ -276,7 +276,7 @@ _public_ const char *udev_device_get_subsystem(struct udev_device *udev_device)
                         return udev_device->subsystem;
                 }
                 /* implicit names */
-                if (strncmp(udev_device->devpath, "/module/", 8) == 0) {
+                if (startswith(udev_device->devpath, "/module/")) {
                         udev_device_set_subsystem(udev_device, "module");
                         return udev_device->subsystem;
                 }
@@ -284,9 +284,9 @@ _public_ const char *udev_device_get_subsystem(struct udev_device *udev_device)
                         udev_device_set_subsystem(udev_device, "drivers");
                         return udev_device->subsystem;
                 }
-                if (strncmp(udev_device->devpath, "/subsystem/", 11) == 0 ||
-                    strncmp(udev_device->devpath, "/class/", 7) == 0 ||
-                    strncmp(udev_device->devpath, "/bus/", 5) == 0) {
+                if (startswith(udev_device->devpath, "/subsystem/") ||
+                    startswith(udev_device->devpath, "/class/") ||
+                    startswith(udev_device->devpath, "/bus/")) {
                         udev_device_set_subsystem(udev_device, "subsystem");
                         return udev_device->subsystem;
                 }
@@ -353,18 +353,18 @@ static struct udev_list_entry *udev_device_add_property_from_string(struct udev_
  */
 void udev_device_add_property_from_string_parse(struct udev_device *udev_device, const char *property)
 {
-        if (strncmp(property, "DEVPATH=", 8) == 0) {
+        if (startswith(property, "DEVPATH=")) {
                 char path[UTIL_PATH_SIZE];
 
                 util_strscpyl(path, sizeof(path), TEST_PREFIX "/sys", &property[8], NULL);
                 udev_device_set_syspath(udev_device, path);
-        } else if (strncmp(property, "SUBSYSTEM=", 10) == 0) {
+        } else if (startswith(property, "SUBSYSTEM=")) {
                 udev_device_set_subsystem(udev_device, &property[10]);
-        } else if (strncmp(property, "DEVTYPE=", 8) == 0) {
+        } else if (startswith(property, "DEVTYPE=")) {
                 udev_device_set_devtype(udev_device, &property[8]);
-        } else if (strncmp(property, "DEVNAME=", 8) == 0) {
+        } else if (startswith(property, "DEVNAME=")) {
                 udev_device_set_devnode(udev_device, &property[8]);
-        } else if (strncmp(property, "DEVLINKS=", 9) == 0) {
+        } else if (startswith(property, "DEVLINKS=")) {
                 char devlinks[UTIL_PATH_SIZE];
                 char *slink;
                 char *next;
@@ -380,7 +380,7 @@ void udev_device_add_property_from_string_parse(struct udev_device *udev_device,
                 }
                 if (slink[0] != '\0')
                         udev_device_add_devlink(udev_device, slink, 0);
-        } else if (strncmp(property, "TAGS=", 5) == 0) {
+        } else if (startswith(property, "TAGS=")) {
                 char tags[UTIL_PATH_SIZE];
                 char *next;
 
@@ -400,23 +400,23 @@ void udev_device_add_property_from_string_parse(struct udev_device *udev_device,
                                 udev_device_add_tag(udev_device, tag);
                         }
                 }
-        } else if (strncmp(property, "USEC_INITIALIZED=", 19) == 0) {
+        } else if (startswith(property, "USEC_INITIALIZED=")) {
                 udev_device_set_usec_initialized(udev_device, strtoull(&property[19], NULL, 10));
-        } else if (strncmp(property, "DRIVER=", 7) == 0) {
+        } else if (startswith(property, "DRIVER=")) {
                 udev_device_set_driver(udev_device, &property[7]);
-        } else if (strncmp(property, "ACTION=", 7) == 0) {
+        } else if (startswith(property, "ACTION=")) {
                 udev_device_set_action(udev_device, &property[7]);
-        } else if (strncmp(property, "MAJOR=", 6) == 0) {
+        } else if (startswith(property, "MAJOR=")) {
                 udev_device->maj = strtoull(&property[6], NULL, 10);
-        } else if (strncmp(property, "MINOR=", 6) == 0) {
+        } else if (startswith(property, "MINOR=")) {
                 udev_device->min = strtoull(&property[6], NULL, 10);
-        } else if (strncmp(property, "DEVPATH_OLD=", 12) == 0) {
+        } else if (startswith(property, "DEVPATH_OLD=")) {
                 udev_device_set_devpath_old(udev_device, &property[12]);
-        } else if (strncmp(property, "SEQNUM=", 7) == 0) {
+        } else if (startswith(property, "SEQNUM=")) {
                 udev_device_set_seqnum(udev_device, strtoull(&property[7], NULL, 10));
-        } else if (strncmp(property, "IFINDEX=", 8) == 0) {
+        } else if (startswith(property, "IFINDEX=")) {
                 udev_device_set_ifindex(udev_device, strtoull(&property[8], NULL, 10));
-        } else if (strncmp(property, "DEVMODE=", 8) == 0) {
+        } else if (startswith(property, "DEVMODE=")) {
                 udev_device_set_devnode_mode(udev_device, strtoul(&property[8], NULL, 8));
         } else {
                 udev_device_add_property_from_string(udev_device, property);
@@ -548,24 +548,24 @@ int udev_device_read_uevent_file(struct udev_device *udev_device)
                         continue;
                 pos[0] = '\0';
 
-                if (strncmp(line, "DEVTYPE=", 8) == 0) {
+                if (startswith(line, "DEVTYPE=")) {
                         udev_device_set_devtype(udev_device, &line[8]);
                         continue;
                 }
-                if (strncmp(line, "IFINDEX=", 8) == 0) {
+                if (startswith(line, "IFINDEX=")) {
                         udev_device_set_ifindex(udev_device, strtoull(&line[8], NULL, 10));
                         continue;
                 }
-                if (strncmp(line, "DEVNAME=", 8) == 0) {
+                if (startswith(line, "DEVNAME=")) {
                         udev_device_set_devnode(udev_device, &line[8]);
                         continue;
                 }
 
-                if (strncmp(line, "MAJOR=", 6) == 0)
+                if (startswith(line, "MAJOR="))
                         maj = strtoull(&line[6], NULL, 10);
-                else if (strncmp(line, "MINOR=", 6) == 0)
+                else if (startswith(line, "MINOR="))
                         min = strtoull(&line[6], NULL, 10);
-                else if (strncmp(line, "DEVMODE=", 8) == 0)
+                else if (startswith(line, "DEVMODE="))
                         udev_device->devnode_mode = strtoul(&line[8], NULL, 8);
 
                 udev_device_add_property_from_string(udev_device, line);
@@ -636,7 +636,7 @@ _public_ struct udev_device *udev_device_new_from_syspath(struct udev *udev, con
                 return NULL;
 
         /* path starts in sys */
-        if (strncmp(syspath, TEST_PREFIX "/sys", strlen(TEST_PREFIX "/sys")) != 0) {
+        if (!startswith(syspath, TEST_PREFIX "/sys")) {
                 dbg(udev, "not in sys :%s\n", syspath);
                 return NULL;
         }
@@ -651,7 +651,7 @@ _public_ struct udev_device *udev_device_new_from_syspath(struct udev *udev, con
         util_strscpy(path, sizeof(path), syspath);
         util_resolve_sys_link(udev, path, sizeof(path));
 
-        if (strncmp(path + strlen(TEST_PREFIX "/sys"), "/devices/", 9) == 0) {
+        if (startswith(path + strlen(TEST_PREFIX "/sys"), "/devices/")) {
                 char file[UTIL_PATH_SIZE];
 
                 /* all "devices" require a "uevent" file */
@@ -783,7 +783,7 @@ _public_ struct udev_device *udev_device_new_from_subsystem_sysname(struct udev
         char path[UTIL_PATH_SIZE];
         struct stat statbuf;
 
-        if (strcmp(subsystem, "subsystem") == 0) {
+        if (streq(subsystem, "subsystem")) {
                 util_strscpyl(path, sizeof(path), TEST_PREFIX "/sys/subsystem/", sysname, NULL);
                 if (stat(path, &statbuf) == 0)
                         goto found;
@@ -798,14 +798,14 @@ _public_ struct udev_device *udev_device_new_from_subsystem_sysname(struct udev
                 goto out;
         }
 
-        if (strcmp(subsystem, "module") == 0) {
+        if (streq(subsystem, "module")) {
                 util_strscpyl(path, sizeof(path), TEST_PREFIX "/sys/module/", sysname, NULL);
                 if (stat(path, &statbuf) == 0)
                         goto found;
                 goto out;
         }
 
-        if (strcmp(subsystem, "drivers") == 0) {
+        if (streq(subsystem, "drivers")) {
                 char subsys[UTIL_NAME_SIZE];
                 char *driver;
 
@@ -966,11 +966,11 @@ _public_ struct udev_device *udev_device_get_parent_with_subsystem_devtype(struc
                 const char *parent_devtype;
 
                 parent_subsystem = udev_device_get_subsystem(parent);
-                if (parent_subsystem != NULL && strcmp(parent_subsystem, subsystem) == 0) {
+                if (parent_subsystem != NULL && streq(parent_subsystem, subsystem)) {
                         if (devtype == NULL)
                                 break;
                         parent_devtype = udev_device_get_devtype(parent);
-                        if (parent_devtype != NULL && strcmp(parent_devtype, devtype) == 0)
+                        if (parent_devtype != NULL && streq(parent_devtype, devtype))
                                 break;
                 }
                 parent = udev_device_get_parent(parent);
@@ -1237,7 +1237,7 @@ _public_ const char *udev_device_get_action(struct udev_device *udev_device)
  **/
 _public_ unsigned long long int udev_device_get_usec_since_initialized(struct udev_device *udev_device)
 {
-        unsigned long long now;
+        unsigned long long now_ts;
 
         if (udev_device == NULL)
                 return 0;
@@ -1245,10 +1245,10 @@ _public_ unsigned long long int udev_device_get_usec_since_initialized(struct ud
                 udev_device_read_db(udev_device, NULL);
         if (udev_device->usec_initialized == 0)
                 return 0;
-        now = now_usec();
-        if (now == 0)
+        now_ts = now_usec();
+        if (now_ts == 0)
                 return 0;
-        return now - udev_device->usec_initialized;
+        return now_ts - udev_device->usec_initialized;
 }
 
 unsigned long long udev_device_get_usec_initialized(struct udev_device *udev_device)
@@ -1309,9 +1309,9 @@ _public_ const char *udev_device_get_sysattr_value(struct udev_device *udev_devi
                  * Some core links return only the last element of the target path,
                  * these are just values, the paths should not be exposed.
                  */
-                if (strcmp(sysattr, "driver") == 0 ||
-                    strcmp(sysattr, "subsystem") == 0 ||
-                    strcmp(sysattr, "module") == 0) {
+                if (streq(sysattr, "driver") ||
+                    streq(sysattr, "subsystem") ||
+                    streq(sysattr, "module")) {
                         if (util_get_sys_core_link_value(udev_device->udev, sysattr,
                                                          udev_device->syspath, value, sizeof(value)) < 0)
                                 return NULL;
@@ -1497,7 +1497,7 @@ const char *udev_device_get_id_filename(struct udev_device *udev_device)
                 if (major(udev_device_get_devnum(udev_device)) > 0) {
                         /* use dev_t -- b259:131072, c254:0 */
                         if (asprintf(&udev_device->id_filename, "%c%u:%u",
-                                     strcmp(udev_device_get_subsystem(udev_device), "block") == 0 ? 'b' : 'c',
+                                     streq(udev_device_get_subsystem(udev_device), "block") ? 'b' : 'c',
                                      major(udev_device_get_devnum(udev_device)),
                                      minor(udev_device_get_devnum(udev_device))) < 0)
                                 udev_device->id_filename = NULL;
diff --git a/src/libudev/libudev-enumerate.c b/src/libudev/libudev-enumerate.c
index ed4f62c66c..4725912c36 100644
--- a/src/libudev/libudev-enumerate.c
+++ b/src/libudev/libudev-enumerate.c
@@ -232,7 +232,7 @@ static size_t devices_delay_later(struct udev *udev, const char *syspath)
                 c += 11;
                 c += strcspn(c, "/");
 
-                if (strncmp(c, "/controlC", 9) == 0)
+                if (startswith(c, "/controlC"))
                         return c - syspath + 1;
         }
 
@@ -595,13 +595,10 @@ static bool match_tag(struct udev_enumerate *udev_enumerate, struct udev_device
 
 static bool match_parent(struct udev_enumerate *udev_enumerate, struct udev_device *dev)
 {
-        const char *parent;
-
         if (udev_enumerate->parent_match == NULL)
                 return true;
 
-        parent = udev_device_get_devpath(udev_enumerate->parent_match);
-        return strncmp(parent, udev_device_get_devpath(dev), strlen(parent)) == 0;
+        return startswith(udev_device_get_devpath(dev), udev_device_get_devpath(udev_enumerate->parent_match));
 }
 
 static bool match_sysname(struct udev_enumerate *udev_enumerate, const char *sysname)
diff --git a/src/libudev/libudev-private.h b/src/libudev/libudev-private.h
index 986c40c91e..60bffa469a 100644
--- a/src/libudev/libudev-private.h
+++ b/src/libudev/libudev-private.h
@@ -17,6 +17,7 @@
 #include <stdint.h>
 #include <stdbool.h>
 #include "macro.h"
+#include "util.h"
 #include "libudev.h"
 
 #define READ_END  0
diff --git a/src/libudev/libudev-util.c b/src/libudev/libudev-util.c
index cb17c3f48c..24d402cd2a 100644
--- a/src/libudev/libudev-util.c
+++ b/src/libudev/libudev-util.c
@@ -62,7 +62,7 @@ int util_resolve_sys_link(struct udev *udev, char *syspath, size_t size)
                 return -1;
         link_target[len] = '\0';
 
-        for (back = 0; strncmp(&link_target[back * 3], "../", 3) == 0; back++)
+        for (back = 0; startswith(&link_target[back * 3], "../"); back++)
                 ;
         for (i = 0; i <= back; i++) {
                 base = strrchr(syspath, '/');
@@ -84,11 +84,11 @@ int util_log_priority(const char *priority)
         prio = strtol(priority, &endptr, 10);
         if (endptr[0] == '\0' || isspace(endptr[0]))
                 return prio;
-        if (strncmp(priority, "err", 3) == 0)
+        if (startswith(priority, "err"))
                 return LOG_ERR;
-        if (strncmp(priority, "info", 4) == 0)
+        if (startswith(priority, "info"))
                 return LOG_INFO;
-        if (strncmp(priority, "debug", 5) == 0)
+        if (startswith(priority, "debug"))
                 return LOG_DEBUG;
         return 0;
 }
diff --git a/src/test/test-libudev.c b/src/test/test-libudev.c
index f5c7ae2c30..481ce65dbf 100644
--- a/src/test/test-libudev.c
+++ b/src/test/test-libudev.c
@@ -21,6 +21,7 @@
 #include <sys/epoll.h>
 
 #include "libudev.h"
+#include "util.h"
 
 #define ARRAY_SIZE(x) (sizeof(x) / sizeof((x)[0]))
 
@@ -474,7 +475,7 @@ int main(int argc, char *argv[])
         }
 
         /* add sys path if needed */
-        if (strncmp(syspath, "/sys", strlen("/sys")) != 0) {
+        if (!startswith(syspath, "/sys")) {
                 snprintf(path, sizeof(path), "/sys/%s", syspath);
                 syspath = path;
         }
diff --git a/src/udev/keymap/keymap.c b/src/udev/keymap/keymap.c
index cc37a9b8c2..a2e43f92c0 100644
--- a/src/udev/keymap/keymap.c
+++ b/src/udev/keymap/keymap.c
@@ -40,6 +40,7 @@ const struct key* lookup_key (const char *str, unsigned int len);
 
 #include "keys-from-name.h"
 #include "keys-to-name.h"
+#include "util.h"
 
 #define MAX_SCANCODES 1024
 
@@ -48,7 +49,7 @@ static int evdev_open(const char *dev)
         int fd;
         char fn[PATH_MAX];
 
-        if (strncmp(dev, "/dev", 4) != 0) {
+        if (!startswith(dev, "/dev")) {
                 snprintf(fn, sizeof(fn), "/dev/%s", dev);
                 dev = fn;
         }
diff --git a/src/udev/udev-builtin-blkid.c b/src/udev/udev-builtin-blkid.c
index fdc68d00a8..39f286a745 100644
--- a/src/udev/udev-builtin-blkid.c
+++ b/src/udev/udev-builtin-blkid.c
@@ -37,45 +37,45 @@ static void print_property(struct udev_device *dev, bool test, const char *name,
 
         s[0] = '\0';
 
-        if (!strcmp(name, "TYPE")) {
+        if (streq(name, "TYPE")) {
                 udev_builtin_add_property(dev, test, "ID_FS_TYPE", value);
 
-        } else if (!strcmp(name, "USAGE")) {
+        } else if (streq(name, "USAGE")) {
                 udev_builtin_add_property(dev, test, "ID_FS_USAGE", value);
 
-        } else if (!strcmp(name, "VERSION")) {
+        } else if (streq(name, "VERSION")) {
                 udev_builtin_add_property(dev, test, "ID_FS_VERSION", value);
 
-        } else if (!strcmp(name, "UUID")) {
+        } else if (streq(name, "UUID")) {
                 blkid_safe_string(value, s, sizeof(s));
                 udev_builtin_add_property(dev, test, "ID_FS_UUID", s);
                 blkid_encode_string(value, s, sizeof(s));
                 udev_builtin_add_property(dev, test, "ID_FS_UUID_ENC", s);
 
-        } else if (!strcmp(name, "UUID_SUB")) {
+        } else if (streq(name, "UUID_SUB")) {
                 blkid_safe_string(value, s, sizeof(s));
                 udev_builtin_add_property(dev, test, "ID_FS_UUID_SUB", s);
                 blkid_encode_string(value, s, sizeof(s));
                 udev_builtin_add_property(dev, test, "ID_FS_UUID_SUB_ENC", s);
 
-        } else if (!strcmp(name, "LABEL")) {
+        } else if (streq(name, "LABEL")) {
                 blkid_safe_string(value, s, sizeof(s));
                 udev_builtin_add_property(dev, test, "ID_FS_LABEL", s);
                 blkid_encode_string(value, s, sizeof(s));
                 udev_builtin_add_property(dev, test, "ID_FS_LABEL_ENC", s);
 
-        } else if (!strcmp(name, "PTTYPE")) {
+        } else if (streq(name, "PTTYPE")) {
                 udev_builtin_add_property(dev, test, "ID_PART_TABLE_TYPE", value);
 
-        } else if (!strcmp(name, "PART_ENTRY_NAME")) {
+        } else if (streq(name, "PART_ENTRY_NAME")) {
                 blkid_encode_string(value, s, sizeof(s));
                 udev_builtin_add_property(dev, test, "ID_PART_ENTRY_NAME", s);
 
-        } else if (!strcmp(name, "PART_ENTRY_TYPE")) {
+        } else if (streq(name, "PART_ENTRY_TYPE")) {
                 blkid_encode_string(value, s, sizeof(s));
                 udev_builtin_add_property(dev, test, "ID_PART_ENTRY_TYPE", s);
 
-        } else if (!strncmp(name, "PART_ENTRY_", 11)) {
+        } else if (startswith(name, "PART_ENTRY_")) {
                 util_strscpyl(s, sizeof(s), "ID_", name, NULL);
                 udev_builtin_add_property(dev, test, s, value);
         }
diff --git a/src/udev/udev-builtin-hwdb.c b/src/udev/udev-builtin-hwdb.c
index aa996f375d..0db21641b1 100644
--- a/src/udev/udev-builtin-hwdb.c
+++ b/src/udev/udev-builtin-hwdb.c
@@ -40,7 +40,7 @@ static int get_id_attr(
                 return -1;
         }
 
-        if (!strncmp(t, "0x", 2))
+        if (startswith(t, "0x"))
                 t += 2;
 
         if (sscanf(t, "%04x", &u) != 1 || u > 0xFFFFU) {
diff --git a/src/udev/udev-builtin-path_id.c b/src/udev/udev-builtin-path_id.c
index a8559d2dd4..09abefc032 100644
--- a/src/udev/udev-builtin-path_id.c
+++ b/src/udev/udev-builtin-path_id.c
@@ -176,7 +176,7 @@ static struct udev_device *handle_scsi_iscsi(struct udev_device *parent, char **
                 transportdev = udev_device_get_parent(transportdev);
                 if (transportdev == NULL)
                         return NULL;
-                if (strncmp(udev_device_get_sysname(transportdev), "session", 7) == 0)
+                if (startswith(udev_device_get_sysname(transportdev), "session"))
                         break;
         }
 
@@ -260,7 +260,7 @@ static struct udev_device *handle_scsi_default(struct udev_device *parent, char
                         continue;
                 if (dent->d_type != DT_DIR && dent->d_type != DT_LNK)
                         continue;
-                if (strncmp(dent->d_name, "host", 4) != 0)
+                if (!startswith(dent->d_name, "host"))
                         continue;
                 i = strtoul(&dent->d_name[4], &rest, 10);
                 if (rest[0] != '\0')
@@ -349,9 +349,9 @@ static void handle_scsi_tape(struct udev_device *dev, char **path)
                 return;
 
         name = udev_device_get_sysname(dev);
-        if (strncmp(name, "nst", 3) == 0 && strchr("lma", name[3]) != NULL)
+        if (startswith(name, "nst") && strchr("lma", name[3]) != NULL)
                 path_prepend(path, "nst%c", name[3]);
-        else if (strncmp(name, "st", 2) == 0 && strchr("lma", name[2]) != NULL)
+        else if (startswith(name, "st") && strchr("lma", name[2]) != NULL)
                 path_prepend(path, "st%c", name[2]);
 }
 
diff --git a/src/udev/udev-event.c b/src/udev/udev-event.c
index d330062ebf..e6f405b74a 100644
--- a/src/udev/udev-event.c
+++ b/src/udev/udev-event.c
@@ -133,7 +133,7 @@ size_t udev_event_apply_format(struct udev_event *event, const char *src, char *
                                 }
 
                                 for (i = 0; i < ELEMENTSOF(map); i++) {
-                                        if (strncmp(&from[1], map[i].name, strlen(map[i].name)) == 0) {
+                                        if (startswith(&from[1], map[i].name)) {
                                                 type = map[i].type;
                                                 from += strlen(map[i].name)+1;
                                                 goto subst;
diff --git a/src/udev/udev-rules.c b/src/udev/udev-rules.c
index 1ec817872d..a800ccdc9f 100644
--- a/src/udev/udev-rules.c
+++ b/src/udev/udev-rules.c
@@ -597,7 +597,7 @@ static uid_t add_uid(struct udev_rules *rules, const char *owner)
         /* lookup, if we know it already */
         for (i = 0; i < rules->uids_cur; i++) {
                 off = rules->uids[i].name_off;
-                if (strcmp(&rules->buf[off], owner) == 0) {
+                if (streq(&rules->buf[off], owner)) {
                         uid = rules->uids[i].uid;
                         return uid;
                 }
@@ -638,7 +638,7 @@ static gid_t add_gid(struct udev_rules *rules, const char *group)
         /* lookup, if we know it already */
         for (i = 0; i < rules->gids_cur; i++) {
                 off = rules->gids[i].name_off;
-                if (strcmp(&rules->buf[off], group) == 0) {
+                if (streq(&rules->buf[off], group)) {
                         gid = rules->gids[i].gid;
                         return gid;
                 }
@@ -726,7 +726,7 @@ static int import_property_from_string(struct udev_device *dev, char *line)
         }
 
         /* handle device, renamed by external tool, returning new path */
-        if (strcmp(key, "DEVPATH") == 0) {
+        if (streq(key, "DEVPATH")) {
                 char syspath[UTIL_PATH_SIZE];
 
                 log_debug("updating devpath from '%s' to '%s'\n",
@@ -1103,7 +1103,7 @@ static int rule_add_key(struct rule_tmp *rule_tmp, enum token_type type,
                 } else if (has_split) {
                         glob = GL_SPLIT;
                 } else if (has_glob) {
-                        if (strcmp(value, "?*") == 0)
+                        if (streq(value, "?*"))
                                 glob = GL_SOMETHING;
                         else
                                 glob = GL_GLOB;
@@ -1200,7 +1200,7 @@ static int add_rule(struct udev_rules *rules, char *line,
                 if (get_key(rules->udev, &linepos, &key, &op, &value) != 0)
                         break;
 
-                if (strcmp(key, "ACTION") == 0) {
+                if (streq(key, "ACTION")) {
                         if (op > OP_MATCH_MAX) {
                                 log_error("invalid ACTION operation\n");
                                 goto invalid;
@@ -1209,7 +1209,7 @@ static int add_rule(struct udev_rules *rules, char *line,
                         continue;
                 }
 
-                if (strcmp(key, "DEVPATH") == 0) {
+                if (streq(key, "DEVPATH")) {
                         if (op > OP_MATCH_MAX) {
                                 log_error("invalid DEVPATH operation\n");
                                 goto invalid;
@@ -1218,7 +1218,7 @@ static int add_rule(struct udev_rules *rules, char *line,
                         continue;
                 }
 
-                if (strcmp(key, "KERNEL") == 0) {
+                if (streq(key, "KERNEL")) {
                         if (op > OP_MATCH_MAX) {
                                 log_error("invalid KERNEL operation\n");
                                 goto invalid;
@@ -1227,16 +1227,16 @@ static int add_rule(struct udev_rules *rules, char *line,
                         continue;
                 }
 
-                if (strcmp(key, "SUBSYSTEM") == 0) {
+                if (streq(key, "SUBSYSTEM")) {
                         if (op > OP_MATCH_MAX) {
                                 log_error("invalid SUBSYSTEM operation\n");
                                 goto invalid;
                         }
                         /* bus, class, subsystem events should all be the same */
-                        if (strcmp(value, "subsystem") == 0 ||
-                            strcmp(value, "bus") == 0 ||
-                            strcmp(value, "class") == 0) {
-                                if (strcmp(value, "bus") == 0 || strcmp(value, "class") == 0)
+                        if (streq(value, "subsystem") ||
+                            streq(value, "bus") ||
+                            streq(value, "class")) {
+                                if (streq(value, "bus") || streq(value, "class"))
                                         log_error("'%s' must be specified as 'subsystem' \n"
                                             "please fix it in %s:%u", value, filename, lineno);
                                 rule_add_key(&rule_tmp, TK_M_SUBSYSTEM, op, "subsystem|class|bus", NULL);
@@ -1245,7 +1245,7 @@ static int add_rule(struct udev_rules *rules, char *line,
                         continue;
                 }
 
-                if (strcmp(key, "DRIVER") == 0) {
+                if (streq(key, "DRIVER")) {
                         if (op > OP_MATCH_MAX) {
                                 log_error("invalid DRIVER operation\n");
                                 goto invalid;
@@ -1254,7 +1254,7 @@ static int add_rule(struct udev_rules *rules, char *line,
                         continue;
                 }
 
-                if (strncmp(key, "ATTR{", sizeof("ATTR{")-1) == 0) {
+                if (startswith(key, "ATTR{")) {
                         attr = get_key_attribute(rules->udev, key + sizeof("ATTR")-1);
                         if (attr == NULL) {
                                 log_error("error parsing ATTR attribute\n");
@@ -1268,7 +1268,7 @@ static int add_rule(struct udev_rules *rules, char *line,
                         continue;
                 }
 
-                if (strcmp(key, "KERNELS") == 0) {
+                if (streq(key, "KERNELS")) {
                         if (op > OP_MATCH_MAX) {
                                 log_error("invalid KERNELS operation\n");
                                 goto invalid;
@@ -1277,7 +1277,7 @@ static int add_rule(struct udev_rules *rules, char *line,
                         continue;
                 }
 
-                if (strcmp(key, "SUBSYSTEMS") == 0) {
+                if (streq(key, "SUBSYSTEMS")) {
                         if (op > OP_MATCH_MAX) {
                                 log_error("invalid SUBSYSTEMS operation\n");
                                 goto invalid;
@@ -1286,7 +1286,7 @@ static int add_rule(struct udev_rules *rules, char *line,
                         continue;
                 }
 
-                if (strcmp(key, "DRIVERS") == 0) {
+                if (streq(key, "DRIVERS")) {
                         if (op > OP_MATCH_MAX) {
                                 log_error("invalid DRIVERS operation\n");
                                 goto invalid;
@@ -1295,7 +1295,7 @@ static int add_rule(struct udev_rules *rules, char *line,
                         continue;
                 }
 
-                if (strncmp(key, "ATTRS{", sizeof("ATTRS{")-1) == 0) {
+                if (startswith(key, "ATTRS{")) {
                         if (op > OP_MATCH_MAX) {
                                 log_error("invalid ATTRS operation\n");
                                 goto invalid;
@@ -1305,7 +1305,7 @@ static int add_rule(struct udev_rules *rules, char *line,
                                 log_error("error parsing ATTRS attribute\n");
                                 goto invalid;
                         }
-                        if (strncmp(attr, "device/", 7) == 0)
+                        if (startswith(attr, "device/"))
                                 log_error("the 'device' link may not be available in a future kernel, "
                                     "please fix it in %s:%u", filename, lineno);
                         else if (strstr(attr, "../") != NULL)
@@ -1315,7 +1315,7 @@ static int add_rule(struct udev_rules *rules, char *line,
                         continue;
                 }
 
-                if (strcmp(key, "TAGS") == 0) {
+                if (streq(key, "TAGS")) {
                         if (op > OP_MATCH_MAX) {
                                 log_error("invalid TAGS operation\n");
                                 goto invalid;
@@ -1324,7 +1324,7 @@ static int add_rule(struct udev_rules *rules, char *line,
                         continue;
                 }
 
-                if (strncmp(key, "ENV{", sizeof("ENV{")-1) == 0) {
+                if (startswith(key, "ENV{")) {
                         attr = get_key_attribute(rules->udev, key + sizeof("ENV")-1);
                         if (attr == NULL) {
                                 log_error("error parsing ENV attribute\n");
@@ -1350,7 +1350,7 @@ static int add_rule(struct udev_rules *rules, char *line,
                                 unsigned int i;
 
                                 for (i = 0; i < ELEMENTSOF(blacklist); i++)
-                                        if (strcmp(attr, blacklist[i]) == 0) {
+                                        if (streq(attr, blacklist[i])) {
                                                 log_error("invalid ENV attribute, '%s' can not be set %s:%u\n", attr, filename, lineno);
                                                 continue;
                                         }
@@ -1360,7 +1360,7 @@ static int add_rule(struct udev_rules *rules, char *line,
                         continue;
                 }
 
-                if (strcmp(key, "TAG") == 0) {
+                if (streq(key, "TAG")) {
                         if (op < OP_MATCH_MAX)
                                 rule_add_key(&rule_tmp, TK_M_TAG, op, value, NULL);
                         else
@@ -1368,12 +1368,12 @@ static int add_rule(struct udev_rules *rules, char *line,
                         continue;
                 }
 
-                if (strcmp(key, "PROGRAM") == 0) {
+                if (streq(key, "PROGRAM")) {
                         rule_add_key(&rule_tmp, TK_M_PROGRAM, op, value, NULL);
                         continue;
                 }
 
-                if (strcmp(key, "RESULT") == 0) {
+                if (streq(key, "RESULT")) {
                         if (op > OP_MATCH_MAX) {
                                 log_error("invalid RESULT operation\n");
                                 goto invalid;
@@ -1382,13 +1382,13 @@ static int add_rule(struct udev_rules *rules, char *line,
                         continue;
                 }
 
-                if (strncmp(key, "IMPORT", sizeof("IMPORT")-1) == 0) {
+                if (startswith(key, "IMPORT")) {
                         attr = get_key_attribute(rules->udev, key + sizeof("IMPORT")-1);
                         if (attr == NULL) {
                                 log_error("IMPORT{} type missing, ignoring IMPORT %s:%u\n", filename, lineno);
                                 continue;
                         }
-                        if (strcmp(attr, "program") == 0) {
+                        if (streq(attr, "program")) {
                                 /* find known built-in command */
                                 if (value[0] != '/') {
                                         enum udev_builtin_cmd cmd;
@@ -1402,27 +1402,27 @@ static int add_rule(struct udev_rules *rules, char *line,
                                         }
                                 }
                                 rule_add_key(&rule_tmp, TK_M_IMPORT_PROG, op, value, NULL);
-                        } else if (strcmp(attr, "builtin") == 0) {
+                        } else if (streq(attr, "builtin")) {
                                 enum udev_builtin_cmd cmd = udev_builtin_lookup(value);
 
                                 if (cmd < UDEV_BUILTIN_MAX)
                                         rule_add_key(&rule_tmp, TK_M_IMPORT_BUILTIN, op, value, &cmd);
                                 else
                                         log_error("IMPORT{builtin}: '%s' unknown %s:%u\n", value, filename, lineno);
-                        } else if (strcmp(attr, "file") == 0) {
+                        } else if (streq(attr, "file")) {
                                 rule_add_key(&rule_tmp, TK_M_IMPORT_FILE, op, value, NULL);
-                        } else if (strcmp(attr, "db") == 0) {
+                        } else if (streq(attr, "db")) {
                                 rule_add_key(&rule_tmp, TK_M_IMPORT_DB, op, value, NULL);
-                        } else if (strcmp(attr, "cmdline") == 0) {
+                        } else if (streq(attr, "cmdline")) {
                                 rule_add_key(&rule_tmp, TK_M_IMPORT_CMDLINE, op, value, NULL);
-                        } else if (strcmp(attr, "parent") == 0) {
+                        } else if (streq(attr, "parent")) {
                                 rule_add_key(&rule_tmp, TK_M_IMPORT_PARENT, op, value, NULL);
                         } else
                                 log_error("IMPORT{} unknown type, ignoring IMPORT %s:%u\n", filename, lineno);
                         continue;
                 }
 
-                if (strncmp(key, "TEST", sizeof("TEST")-1) == 0) {
+                if (startswith(key, "TEST")) {
                         mode_t mode = 0;
 
                         if (op > OP_MATCH_MAX) {
@@ -1439,19 +1439,19 @@ static int add_rule(struct udev_rules *rules, char *line,
                         continue;
                 }
 
-                if (strncmp(key, "RUN", sizeof("RUN")-1) == 0) {
+                if (startswith(key, "RUN")) {
                         attr = get_key_attribute(rules->udev, key + sizeof("RUN")-1);
                         if (attr == NULL)
                                 attr = "program";
 
-                        if (strcmp(attr, "builtin") == 0) {
+                        if (streq(attr, "builtin")) {
                                 enum udev_builtin_cmd cmd = udev_builtin_lookup(value);
 
                                 if (cmd < UDEV_BUILTIN_MAX)
                                         rule_add_key(&rule_tmp, TK_A_RUN_BUILTIN, op, value, &cmd);
                                 else
                                         log_error("IMPORT{builtin}: '%s' unknown %s:%u\n", value, filename, lineno);
-                        } else if (strcmp(attr, "program") == 0) {
+                        } else if (streq(attr, "program")) {
                                 enum udev_builtin_cmd cmd = UDEV_BUILTIN_MAX;
 
                                 rule_add_key(&rule_tmp, TK_A_RUN_PROGRAM, op, value, &cmd);
@@ -1462,26 +1462,26 @@ static int add_rule(struct udev_rules *rules, char *line,
                         continue;
                 }
 
-                if (strcmp(key, "WAIT_FOR") == 0 || strcmp(key, "WAIT_FOR_SYSFS") == 0) {
+                if (streq(key, "WAIT_FOR") || streq(key, "WAIT_FOR_SYSFS")) {
                         rule_add_key(&rule_tmp, TK_M_WAITFOR, 0, value, NULL);
                         continue;
                 }
 
-                if (strcmp(key, "LABEL") == 0) {
+                if (streq(key, "LABEL")) {
                         rule_tmp.rule.rule.label_off = add_string(rules, value);
                         continue;
                 }
 
-                if (strcmp(key, "GOTO") == 0) {
+                if (streq(key, "GOTO")) {
                         rule_add_key(&rule_tmp, TK_A_GOTO, 0, value, NULL);
                         continue;
                 }
 
-                if (strncmp(key, "NAME", sizeof("NAME")-1) == 0) {
+                if (startswith(key, "NAME")) {
                         if (op < OP_MATCH_MAX) {
                                 rule_add_key(&rule_tmp, TK_M_NAME, op, value, NULL);
                         } else {
-                                if (strcmp(value, "%k") == 0) {
+                                if (streq(value, "%k")) {
                                         log_error("NAME=\"%%k\" is ignored, because it breaks kernel supplied names, "
                                             "please remove it from %s:%u\n", filename, lineno);
                                         continue;
@@ -1497,7 +1497,7 @@ static int add_rule(struct udev_rules *rules, char *line,
                         continue;
                 }
 
-                if (strncmp(key, "SYMLINK", sizeof("SYMLINK")-1) == 0) {
+                if (startswith(key, "SYMLINK")) {
                         if (op < OP_MATCH_MAX) {
                                 rule_add_key(&rule_tmp, TK_M_DEVLINK, op, value, NULL);
                         } else {
@@ -1512,7 +1512,7 @@ static int add_rule(struct udev_rules *rules, char *line,
                         continue;
                 }
 
-                if (strcmp(key, "OWNER") == 0) {
+                if (streq(key, "OWNER")) {
                         uid_t uid;
                         char *endptr;
 
@@ -1529,7 +1529,7 @@ static int add_rule(struct udev_rules *rules, char *line,
                         continue;
                 }
 
-                if (strcmp(key, "GROUP") == 0) {
+                if (streq(key, "GROUP")) {
                         gid_t gid;
                         char *endptr;
 
@@ -1546,7 +1546,7 @@ static int add_rule(struct udev_rules *rules, char *line,
                         continue;
                 }
 
-                if (strcmp(key, "MODE") == 0) {
+                if (streq(key, "MODE")) {
                         mode_t mode;
                         char *endptr;
 
@@ -1559,7 +1559,7 @@ static int add_rule(struct udev_rules *rules, char *line,
                         continue;
                 }
 
-                if (strcmp(key, "OPTIONS") == 0) {
+                if (streq(key, "OPTIONS")) {
                         const char *pos;
 
                         pos = strstr(value, "link_priority=");
@@ -1579,9 +1579,9 @@ static int add_rule(struct udev_rules *rules, char *line,
                         pos = strstr(value, "string_escape=");
                         if (pos != NULL) {
                                 pos = &pos[strlen("string_escape=")];
-                                if (strncmp(pos, "none", strlen("none")) == 0)
+                                if (startswith(pos, "none"))
                                         rule_add_key(&rule_tmp, TK_A_STRING_ESCAPE_NONE, op, NULL, NULL);
-                                else if (strncmp(pos, "replace", strlen("replace")) == 0)
+                                else if (startswith(pos, "replace"))
                                         rule_add_key(&rule_tmp, TK_A_STRING_ESCAPE_REPLACE, op, NULL, NULL);
                         }
 
@@ -1694,7 +1694,7 @@ static int parse_file(struct udev_rules *rules, const char *filename, unsigned s
                                         continue;
                                 if (rules->tokens[j].rule.label_off == 0)
                                         continue;
-                                if (strcmp(label, &rules->buf[rules->tokens[j].rule.label_off]) != 0)
+                                if (!streq(label, &rules->buf[rules->tokens[j].rule.label_off]))
                                         continue;
                                 rules->tokens[i].key.rule_goto = j;
                                 break;
@@ -1729,7 +1729,7 @@ static int add_matching_files(struct udev *udev, struct udev_list *file_list, co
                         ext = strrchr(dent->d_name, '.');
                         if (ext == NULL)
                                 continue;
-                        if (strcmp(ext, suffix) != 0)
+                        if (!streq(ext, suffix))
                                 continue;
                 }
                 util_strscpyl(filename, sizeof(filename), dirname, "/", dent->d_name, NULL);
@@ -1927,33 +1927,33 @@ static int match_key(struct udev_rules *rules, struct token *token, const char *
 
         switch (token->key.glob) {
         case GL_PLAIN:
-                match = (strcmp(key_value, val) == 0);
+                match = (streq(key_value, val));
                 break;
         case GL_GLOB:
                 match = (fnmatch(key_value, val, 0) == 0);
                 break;
         case GL_SPLIT:
                 {
-                        const char *split;
+                        const char *s;
                         size_t len;
 
-                        split = &rules->buf[token->key.value_off];
+                        s = &rules->buf[token->key.value_off];
                         len = strlen(val);
                         for (;;) {
                                 const char *next;
 
-                                next = strchr(split, '|');
+                                next = strchr(s, '|');
                                 if (next != NULL) {
-                                        size_t matchlen = (size_t)(next - split);
+                                        size_t matchlen = (size_t)(next - s);
 
-                                        match = (matchlen == len && strncmp(split, val, matchlen) == 0);
+                                        match = (matchlen == len && strncmp(s, val, matchlen) == 0);
                                         if (match)
                                                 break;
                                 } else {
-                                        match = (strcmp(split, val) == 0);
+                                        match = (streq(s, val));
                                         break;
                                 }
-                                split = &next[1];
+                                s = &next[1];
                         }
                         break;
                 }
@@ -2055,7 +2055,7 @@ int udev_rules_apply_to_event(struct udev_rules *rules, struct udev_event *event
         if (rules->tokens == NULL)
                 return -1;
 
-        can_set_name = ((strcmp(udev_device_get_action(event->dev), "remove") != 0) &&
+        can_set_name = ((!streq(udev_device_get_action(event->dev), "remove")) &&
                         (major(udev_device_get_devnum(event->dev)) > 0 ||
                          udev_device_get_ifindex(event->dev) > 0));
 
@@ -2122,7 +2122,7 @@ int udev_rules_apply_to_event(struct udev_rules *rules, struct udev_event *event
                         bool match = false;
 
                         udev_list_entry_foreach(list_entry, udev_device_get_tags_list_entry(event->dev)) {
-                                if (strcmp(&rules->buf[cur->key.value_off], udev_list_entry_get_name(list_entry)) == 0) {
+                                if (streq(&rules->buf[cur->key.value_off], udev_list_entry_get_name(list_entry))) {
                                         match = true;
                                         break;
                                 }
@@ -2566,7 +2566,7 @@ int udev_rules_apply_to_event(struct udev_rules *rules, struct udev_event *event
                                         log_debug("%i character(s) replaced\n", count);
                         }
                         if (major(udev_device_get_devnum(event->dev)) &&
-                            (strcmp(name_str, udev_device_get_devnode(event->dev) + strlen(TEST_PREFIX "/dev/")) != 0)) {
+                            (!streq(name_str, udev_device_get_devnode(event->dev) + strlen(TEST_PREFIX "/dev/")))) {
                                 log_error("NAME=\"%s\" ignored, kernel device nodes "
                                     "can not be renamed; please fix it in %s:%u\n", name,
                                     &rules->buf[rule->rule.filename_off], rule->rule.filename_line);
diff --git a/src/udev/udev.h b/src/udev/udev.h
index ed5f768ea8..e229faaa4a 100644
--- a/src/udev/udev.h
+++ b/src/udev/udev.h
@@ -25,6 +25,7 @@
 
 #include "libudev.h"
 #include "libudev-private.h"
+#include "util.h"
 
 struct udev_event {
         struct udev *udev;
diff --git a/src/udev/udevadm-info.c b/src/udev/udevadm-info.c
index 3b14139459..229c0a2849 100644
--- a/src/udev/udevadm-info.c
+++ b/src/udev/udevadm-info.c
@@ -325,7 +325,7 @@ static int uinfo(struct udev *udev, int argc, char *argv[])
                                 goto exit;
                         }
                         /* add /dev if not given */
-                        if (strncmp(optarg, "/dev", strlen("/dev")) != 0)
+                        if (!startswith(optarg, "/dev"))
                                 util_strscpyl(name, sizeof(name), "/dev/", optarg, NULL);
                         else
                                 util_strscpy(name, sizeof(name), optarg);
@@ -361,7 +361,7 @@ static int uinfo(struct udev *udev, int argc, char *argv[])
                                 goto exit;
                         }
                         /* add sys dir if needed */
-                        if (strncmp(optarg, "/sys", strlen("/sys")) != 0)
+                        if (!startswith(optarg, "/sys"))
                                 util_strscpyl(path, sizeof(path), "/sys", optarg, NULL);
                         else
                                 util_strscpy(path, sizeof(path), optarg);
diff --git a/src/udev/udevadm-test-builtin.c b/src/udev/udevadm-test-builtin.c
index e63b1f4eb7..ef788b0e02 100644
--- a/src/udev/udevadm-test-builtin.c
+++ b/src/udev/udevadm-test-builtin.c
@@ -95,7 +95,7 @@ static int adm_builtin(struct udev *udev, int argc, char *argv[])
         }
 
         /* add /sys if needed */
-        if (strncmp(syspath, "/sys", strlen("/sys")) != 0)
+        if (!startswith(syspath, "/sys"))
                 util_strscpyl(filename, sizeof(filename), "/sys", syspath, NULL);
         else
                 util_strscpy(filename, sizeof(filename), syspath);
diff --git a/src/udev/udevadm-test.c b/src/udev/udevadm-test.c
index 0c8a762540..65e9f3ecca 100644
--- a/src/udev/udevadm-test.c
+++ b/src/udev/udevadm-test.c
@@ -112,7 +112,7 @@ static int adm_test(struct udev *udev, int argc, char *argv[])
         }
 
         /* add /sys if needed */
-        if (strncmp(syspath, "/sys", strlen("/sys")) != 0)
+        if (!startswith(syspath, "/sys"))
                 util_strscpyl(filename, sizeof(filename), "/sys", syspath, NULL);
         else
                 util_strscpy(filename, sizeof(filename), syspath);
diff --git a/src/udev/udevadm-trigger.c b/src/udev/udevadm-trigger.c
index a910121ecd..7735e4b67b 100644
--- a/src/udev/udevadm-trigger.c
+++ b/src/udev/udevadm-trigger.c
@@ -164,7 +164,7 @@ static int adm_trigger(struct udev *udev, int argc, char *argv[])
                         struct udev_device *dev;
 
                         /* add sys dir if needed */
-                        if (strncmp(optarg, "/sys", strlen("/sys")) != 0)
+                        if (!startswith(optarg, "/sys"))
                                 util_strscpyl(path, sizeof(path), "/sys", optarg, NULL);
                         else
                                 util_strscpy(path, sizeof(path), optarg);