Use rc_getline instead of assuming a fixed kernel cmdline length.

This is now requires as COMMAND_LINE_SIZE isn't exposed by kernel
headers anymore.
Fixes #177.

src/librc/librc.h

@@ -72,8 +72,6 @@
 #define librc_hidden_proto(x) hidden_proto(x)
 #define librc_hidden_def(x) hidden_def(x)
 
-ssize_t rc_getline(char **, size_t *, FILE *);
-
 librc_hidden_proto(rc_config_list)
 librc_hidden_proto(rc_config_load)
 librc_hidden_proto(rc_config_value)

src/librc/rc.h.in

@@ -517,5 +517,9 @@ 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);
 
+/* 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
 #endif

src/librc/rc.map

@@ -12,6 +12,7 @@ global:
 	rc_deptree_update_needed;
 	rc_environ_fd;
 	rc_find_pids;
+	rc_getline;
 	rc_newer_than;
 	rc_older_than;
 	rc_runlevel_exists;

src/rc/rc.c

@@ -43,10 +43,6 @@ const char rc_copyright[] = "Copyright (c) 2007-2008 Roy Marples";
 #include <sys/utsname.h>
 #include <sys/wait.h>
 
-#ifdef __linux__
-#  include <asm/setup.h> /* for COMMAND_LINE_SIZE */
-#endif
-
 #include <errno.h>
 #include <dirent.h>
 #include <ctype.h>
@@ -177,10 +173,8 @@ static char *
 proc_getent(const char *ent)
 {
 	FILE *fp;
-	char proc[COMMAND_LINE_SIZE];
-	char *p;
-	char *value = NULL;
-	int i;
+	char *proc, *p, *value = NULL;
+	size_t i;
 
 	if (!exists("/proc/cmdline"))
 		return NULL;
@@ -190,11 +184,11 @@ proc_getent(const char *ent)
 		return NULL;
 	}
 
-	memset(proc, 0, sizeof(proc));
-	p = fgets(proc, sizeof(proc), fp);
-	if (p == NULL)
-		eerror("fgets: %s", strerror(errno));
-	else if (*proc && (p = strstr(proc, ent))) {
+	proc = NULL;
+	i = 0;
+	if (rc_getline(&proc, &i, fp) == -1 || proc == NULL)
+		eerror("rc_getline: %s", strerror(errno));
+	if (*proc && (p = strstr(proc, ent))) {
 		i = p - proc;
 		if (i == '\0' || proc[i - 1] == ' ') {
 			p += strlen(ent);
@@ -205,6 +199,7 @@ proc_getent(const char *ent)
 	} else
 		errno = ENOENT;
 	fclose(fp);
+	free(proc);
 
 	return value;
 }

src/test/rc.funcs.list

@@ -20,6 +20,8 @@ rc_deptree_update_needed
 rc_deptree_update_needed@@RC_1.0
 rc_find_pids
 rc_find_pids@@RC_1.0
+rc_getline
+rc_getline@@RC_1.0
 rc_newer_than
 rc_newer_than@@RC_1.0
 rc_older_than