always unconditionally create /dev/rtc and use it internally

[elogind.git] / src / shared / hwclock.c

diff --git a/src/shared/hwclock.c b/src/shared/hwclock.c
index 55b0fa8a0f1c855ade2f9ee26bbc141aaf1f6cf2..cc11faa6c37042ad1dbcb414ccab348786a3e336 100644 (file)
--- a/src/shared/hwclock.c
+++ b/src/shared/hwclock.c
@@ -43,90 +43,13 @@
 #include "hwclock.h"
 #include "fileio.h"
 
-static int rtc_open(int flags) {
-        int fd;
-        DIR *d;
-
-        /* First, we try to make use of the /dev/rtc symlink. If that
-         * doesn't exist, we open the first RTC which has hctosys=1
-         * set. If we don't find any we just take the first RTC that
-         * exists at all. */
-
-        fd = open("/dev/rtc", flags);
-        if (fd >= 0)
-                return fd;
-
-        d = opendir("/sys/class/rtc");
-        if (!d)
-                goto fallback;
-
-        for (;;) {
-                char *p, *v;
-                struct dirent *de;
-                union dirent_storage buf;
-                int r;
-
-                r = readdir_r(d, &buf.de, &de);
-                if (r != 0)
-                        goto fallback;
-
-                if (!de)
-                        goto fallback;
-
-                if (ignore_file(de->d_name))
-                        continue;
-
-                p = strjoin("/sys/class/rtc/", de->d_name, "/hctosys", NULL);
-                if (!p) {
-                        closedir(d);
-                        return -ENOMEM;
-                }
-
-                r = read_one_line_file(p, &v);
-                free(p);
-
-                if (r < 0)
-                        continue;
-
-                r = parse_boolean(v);
-                free(v);
-
-                if (r <= 0)
-                        continue;
-
-                p = strappend("/dev/", de->d_name);
-                if (!p) {
-                        closedir(d);
-                        return -ENOMEM;
-                }
-
-                fd = open(p, flags);
-                free(p);
-
-                if (fd >= 0) {
-                        closedir(d);
-                        return fd;
-                }
-        }
-
-fallback:
-        if (d)
-                closedir(d);
-
-        fd = open("/dev/rtc0", flags);
-        if (fd < 0)
-                return -errno;
-
-        return fd;
-}
-
 int hwclock_get_time(struct tm *tm) {
         int fd;
         int err = 0;
 
         assert(tm);
 
-        fd = rtc_open(O_RDONLY|O_CLOEXEC);
+        fd = open("/dev/rtc", O_RDONLY|O_CLOEXEC);
         if (fd < 0)
                 return -errno;
 
@@ -150,7 +73,7 @@ int hwclock_set_time(const struct tm *tm) {
 
         assert(tm);
 
-        fd = rtc_open(O_RDONLY|O_CLOEXEC);
+        fd = open("/dev/rtc", O_RDONLY|O_CLOEXEC);
         if (fd < 0)
                 return -errno;
 
@@ -163,8 +86,7 @@ int hwclock_set_time(const struct tm *tm) {
 }
 
 int hwclock_is_localtime(void) {
-        FILE *f;
-        bool local = false;
+        _cleanup_fclose_ FILE *f;
 
         /*
          * The third line of adjtime is "UTC" or "LOCAL" or nothing.
@@ -181,19 +103,16 @@ int hwclock_is_localtime(void) {
                 b = fgets(line, sizeof(line), f) &&
                         fgets(line, sizeof(line), f) &&
                         fgets(line, sizeof(line), f);
-
-                fclose(f);
-
                 if (!b)
                         return -EIO;
 
                 truncate_nl(line);
-                local = streq(line, "LOCAL");
+                return streq(line, "LOCAL");
 
         } else if (errno != ENOENT)
                 return -errno;
 
-        return local;
+        return 0;
 }
 
 int hwclock_set_timezone(int *min) {