librc: Remove rc_getline.

getline(3) got standardized in posix 2008 and is common place on all
libc implementations now a days, and rc_getline is tagged for removal
for ages now.

FEATURE-REMOVAL-SCHEDULE.md

@@ -58,13 +58,3 @@ Who:
 If you have a c program that links to librc and uses functions from
 there, this section will list API functions which are deprecated and
 will be removed along with the reason they are being removed.
-
-## rc_getline()
-
-When: 1.0
-
-Why: The getline() function was standardized in POSIX.1-2008, so it
-	 should be available on POSIX systems.
-
-Who:
-

src/librc/librc-misc.c

@@ -102,30 +102,6 @@ rc_getfile(const char *file, char **buffer, size_t *len)
 	return ret;
 }
 
-ssize_t
-rc_getline(char **line, size_t *len, FILE *fp)
-{
-	char *p;
-	size_t last = 0;
-
-	while (!feof(fp)) {
-		if (*line == NULL || last != 0) {
-			*len += BUFSIZ;
-			*line = xrealloc(*line, *len);
-		}
-		p = *line + last;
-		memset(p, 0, BUFSIZ);
-		if (fgets(p, BUFSIZ, fp) == NULL)
-			break;
-		last += strlen(p);
-		if (last && (*line)[last - 1] == '\n') {
-			(*line)[last - 1] = '\0';
-			break;
-		}
-	}
-	return last;
-}
-
 char *
 rc_proc_getent(const char *ent RC_UNUSED)
 {

src/librc/rc.h.in

@@ -597,13 +597,9 @@ typedef LIST_HEAD(rc_pidlist, rc_pid) RC_PIDLIST;
  * @return NULL terminated list of pids */
 RC_PIDLIST *rc_find_pids(const char *, const char *const *, uid_t, pid_t);
 
-/* Basically the same as rc_getline() below, it just returns multiple lines */
+/* Basically the same as getline(), it just returns multiple lines */
 bool rc_getfile(const char *, char **, size_t *);
 
-/* getline is a handy glibc function that not all libcs have, so
- * we have our own */
-ssize_t rc_getline(char **, size_t *, FILE *);
-
 /* __END_DECLS */
 #ifdef __cplusplus
 }

src/librc/rc.map

@@ -15,7 +15,6 @@ global:
 	rc_environ_fd;
 	rc_find_pids;
 	rc_getfile;
-	rc_getline;
 	rc_newer_than;
 	rc_older_than;
 	rc_proc_getent;