util: rename parse_usec() to parse_sec() sinds the default unit is seconds

Internally we store all time values in usec_t, however parse_usec()
actually was used mostly to parse values in seconds (unless explicit
units were specified to define a different unit). Hence, be clear about
this and name the function about what we pass into it, not what we get
out of it.

src/shared/conf-parser.c

@@ -792,7 +792,7 @@ int config_parse_path_strv(
         return 0;
 }
 
-int config_parse_usec(
+int config_parse_sec(
                 const char *filename,
                 unsigned line,
                 const char *section,
@@ -809,7 +809,7 @@ int config_parse_usec(
         assert(rvalue);
         assert(data);
 
-        if (parse_usec(rvalue, usec) < 0) {
+        if (parse_sec(rvalue, usec) < 0) {
                 log_error("[%s:%u] Failed to parse time value, ignoring: %s", filename, line, rvalue);
                 return 0;
         }

src/shared/conf-parser.h

@@ -101,7 +101,7 @@ int config_parse_string(const char *filename, unsigned line, const char *section
 int config_parse_path(const char *filename, unsigned line, const char *section, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
 int config_parse_strv(const char *filename, unsigned line, const char *section, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
 int config_parse_path_strv(const char *filename, unsigned line, const char *section, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
-int config_parse_usec(const char *filename, unsigned line, const char *section, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
+int config_parse_sec(const char *filename, unsigned line, const char *section, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
 int config_parse_nsec(const char *filename, unsigned line, const char *section, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
 int config_parse_mode(const char *filename, unsigned line, const char *section, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);
 int config_parse_facility(const char *filename, unsigned line, const char *section, const char *lvalue, int ltype, const char *rvalue, void *data, void *userdata);

src/shared/time-util.c

@@ -256,7 +256,7 @@ char *format_timespan(char *buf, size_t l, usec_t t) {
                 return p;
         }
 
-        /* The result of this function can be parsed with parse_usec */
+        /* The result of this function can be parsed with parse_sec */
 
         for (i = 0; i < ELEMENTSOF(table); i++) {
                 int k;
@@ -382,14 +382,14 @@ int parse_timestamp(const char *t, usec_t *usec) {
 
         } else if (t[0] == '+') {
 
-                r = parse_usec(t+1, &plus);
+                r = parse_sec(t+1, &plus);
                 if (r < 0)
                         return r;
 
                 goto finish;
         } else if (t[0] == '-') {
 
-                r = parse_usec(t+1, &minus);
+                r = parse_sec(t+1, &minus);
                 if (r < 0)
                         return r;
 
@@ -402,7 +402,7 @@ int parse_timestamp(const char *t, usec_t *usec) {
                 if (!z)
                         return -ENOMEM;
 
-                r = parse_usec(z, &minus);
+                r = parse_sec(z, &minus);
                 if (r < 0)
                         return r;
 
@@ -497,7 +497,7 @@ finish:
         return 0;
 }
 
-int parse_usec(const char *t, usec_t *usec) {
+int parse_sec(const char *t, usec_t *usec) {
         static const struct {
                 const char *suffix;
                 usec_t usec;

src/shared/time-util.h

@@ -80,5 +80,5 @@ void dual_timestamp_deserialize(const char *value, dual_timestamp *t);
 
 int parse_timestamp(const char *t, usec_t *usec);
 
-int parse_usec(const char *t, usec_t *usec);
+int parse_sec(const char *t, usec_t *usec);
 int parse_nsec(const char *t, nsec_t *nsec);