libbb: fixes to config_read() by maintainer

sysctl: use config_read()

function                                             old     new   delta
sysctl_main                                          121     232    +111
config_read                                          478     502     +24
parse_main                                           239     241      +2
sysctl_preload_file_and_exit                         234       -    -234
------------------------------------------------------------------------------
(add/remove: 0/1 grow/shrink: 3/0 up/down: 137/-234)          Total: -97 bytes

1 files changed, 18 insertions, 42 deletions

diff --git a/procps/sysctl.c b/procps/sysctl.c
index 3607a23..6e582b0 100644
--- a/procps/sysctl.c
+++ b/procps/sysctl.c
@@ -88,56 +88,32 @@ int sysctl_main(int argc UNUSED_PARAM, char **argv)
  * preload the sysctl's from a conf file
  * - we parse the file and then reform it (strip out whitespace)
  */
-#define PRELOAD_BUF 256
 
 static int sysctl_preload_file_and_exit(const char *filename)
 {
-	int lineno;
-	char oneline[PRELOAD_BUF];
-	char buffer[PRELOAD_BUF];
-	char *name, *value;
-	FILE *fp;
+	char *token[2];
+	parser_t *parser;
 
-	fp = xfopen(filename, "r");
-
-	lineno = 0;
-	while (fgets(oneline, sizeof(oneline) - 1, fp)) {
-		lineno++;
-		trim(oneline);
-		if (oneline[0] == '#' || oneline[0] == ';')
-			continue;
-		if (!oneline[0] || !oneline[1])
-			continue;
-
-		name = strtok(oneline, "=");
-		if (!name) {
-			bb_error_msg(WARN_BAD_LINE, filename, lineno);
-			continue;
-		}
-		trim(name);
-		if (!*name) {
-			bb_error_msg(WARN_BAD_LINE, filename, lineno);
-			continue;
-		}
+	parser = config_open(filename);
+	if (!parser)
+		return 1;
 
-		value = strtok(NULL, "\n\r");
-		if (!value) {
-			bb_error_msg(WARN_BAD_LINE, filename, lineno);
-			continue;
-		}
-		while (*value == ' ' || *value == '\t')
-			value++;
-		if (!*value) {
-			bb_error_msg(WARN_BAD_LINE, filename, lineno);
-			continue;
+	while (config_read(parser, token, 2, 0, "# \t=", PARSE_LAST_IS_GREEDY)) { // TODO: ';' is comment char too
+		if (!token[1]) {
+			bb_error_msg(WARN_BAD_LINE, filename, parser->lineno);
+		} else {
+#if 0
+			char *s = xasprintf("%s=%s", token[0], token[1]);
+			sysctl_write_setting(s);
+			free(s);
+#else // PLAY_WITH_FIRE for -4 bytes?
+			sprintf(parser->line, "%s=%s", token[0], token[1]); // must have room by definition
+			sysctl_write_setting(parser->line);
+#endif
 		}
-
-		/* safe because sizeof(oneline) == sizeof(buffer) */
-		sprintf(buffer, "%s=%s", name, value);
-		sysctl_write_setting(buffer);
 	}
 	if (ENABLE_FEATURE_CLEAN_UP)
-		fclose(fp);
+		config_close(parser);
 	return 0;
 } /* end sysctl_preload_file_and_exit() */