X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=blobdiff_plain;f=util.c;fp=util.c;h=83e819a0cb769decb718148ab02af4a3bb9b8f61;hb=24a6e4a401f0be0c4cd67621186792d0b7e401a1;hp=e9f7813b8b378d13af2b7e322a5aaf9a3f612362;hpb=40d50879d9339e539a30e5d32234baffb732f0f9;p=elogind.git

diff --git a/util.c b/util.c
index e9f7813b8..83e819a0c 100644
--- a/util.c
+++ b/util.c
@@ -1776,6 +1776,69 @@ int path_is_mount_point(const char *t) {
         return a.st_dev != b.st_dev;
 }
 
+int parse_usec(const char *t, usec_t *usec) {
+        static const struct {
+                const char *suffix;
+                usec_t usec;
+        } table[] = {
+                { "sec", USEC_PER_SEC },
+                { "s", USEC_PER_SEC },
+                { "min", USEC_PER_MINUTE },
+                { "hr", USEC_PER_HOUR },
+                { "h", USEC_PER_HOUR },
+                { "d", USEC_PER_DAY },
+                { "w", USEC_PER_WEEK },
+                { "msec", USEC_PER_MSEC },
+                { "ms", USEC_PER_MSEC },
+                { "m", USEC_PER_MINUTE },
+                { "usec", 1ULL },
+                { "us", 1ULL },
+                { "", USEC_PER_SEC },
+        };
+
+        const char *p;
+        usec_t r = 0;
+
+        assert(t);
+        assert(usec);
+
+        p = t;
+        do {
+                long long l;
+                char *e;
+                unsigned i;
+
+                errno = 0;
+                l = strtoll(p, &e, 10);
+
+                if (errno != 0)
+                        return -errno;
+
+                if (l < 0)
+                        return -ERANGE;
+
+                if (e == p)
+                        return -EINVAL;
+
+                e += strspn(e, WHITESPACE);
+
+                for (i = 0; i < ELEMENTSOF(table); i++)
+                        if (startswith(e, table[i].suffix)) {
+                                r += (usec_t) l * table[i].usec;
+                                p = e + strlen(table[i].suffix);
+                                break;
+                        }
+
+                if (i >= ELEMENTSOF(table))
+                        return -EINVAL;
+
+        } while (*p != 0);
+
+        *usec = r;
+
+        return 0;
+}
+
 static const char *const ioprio_class_table[] = {
         [IOPRIO_CLASS_NONE] = "none",
         [IOPRIO_CLASS_RT] = "realtime",