*: conversion to config parser

function                                             old     new   delta
config_read                                          540     597     +57
config_open2                                          41      44      +3
rtnl_rtprot_initialize                                70      66      -4
rtnl_rttable_initialize                               78      73      -5
rtnl_rtscope_initialize                               88      83      -5
rtnl_rtrealm_initialize                               48      43      -5
rtnl_rtdsfield_initialize                             48      43      -5
process_module                                       566     560      -6
bbunpack                                             391     383      -8
rtnl_tab_initialize                                  279     121    -158
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 2/8 up/down: 60/-196)          Total: -136 bytes

5 files changed, 57 insertions, 106 deletions

diff --git a/include/libbb.h b/include/libbb.h
index c0b731b..47fcdf0 100644
--- a/include/libbb.h
+++ b/include/libbb.h
@@ -1006,6 +1006,7 @@ enum {
 	PARSE_MIN_DIE        = 0x00100000, // die if less tokens found
 	// keep a copy of current line
 	PARSE_KEEP_COPY      = 0x00200000 * ENABLE_DEBUG_CROND_OPTION,
+	PARSE_ESCAPE         = 0x00400000, // process escape sequences in tokens
 };
 typedef struct parser_t {
 	FILE *fp;
diff --git a/libbb/parse_config.c b/libbb/parse_config.c
index d1b2921..83dc997 100644
--- a/libbb/parse_config.c
+++ b/libbb/parse_config.c
@@ -66,8 +66,7 @@ parser_t* FAST_FUNC config_open2(const char *filename, FILE* FAST_FUNC (*fopen_f
 	parser->fp = fopen_func(filename);
 	if (parser->fp)
 		return parser;
-	if (ENABLE_FEATURE_CLEAN_UP)
-		free(parser);
+	free(parser);
 	return NULL;
 }
 
@@ -212,6 +211,19 @@ int FAST_FUNC config_read(parser_t *parser, char **tokens, unsigned flags, const
 		if ((flags & (PARSE_DONT_REDUCE|PARSE_DONT_TRIM)) || *line) {
 			//bb_info_msg("N[%d] T[%s]", ii, line);
 			tokens[ii++] = line;
+			// process escapes in token
+			if (flags & PARSE_ESCAPE) {
+				char *s = line;
+				while (*s) {
+					if (*s == '\\') {
+						s++;
+						*line++ = bb_process_escape_sequence((const char **)&s);
+					} else {
+						*line++ = *s++;
+					}
+				}
+				*line = '\0';
+			}
 		}
 		line = q;
 		//bb_info_msg("A[%s]", line);
diff --git a/miscutils/fbsplash.c b/miscutils/fbsplash.c
index 380f09b..6357f78 100644
--- a/miscutils/fbsplash.c
+++ b/miscutils/fbsplash.c
@@ -38,13 +38,7 @@ struct globals {
 	FILE *logfile_fd;	// log file
 #endif
 	unsigned char *addr;	// pointer to framebuffer memory
-	unsigned nbar_width;	// progress bar width
-	unsigned nbar_height;	// progress bar height
-	unsigned nbar_posx;	// progress bar horizontal position
-	unsigned nbar_posy;	// progress bar vertical position
-	unsigned char nbar_colr;	// progress bar color red component
-	unsigned char nbar_colg;	// progress bar color green component
-	unsigned char nbar_colb;	// progress bar color blue component
+	unsigned ns[7];		// n-parameters
 	const char *image_filename;
 	struct fb_var_screeninfo scr_var;
 	struct fb_fix_screeninfo scr_fix;
@@ -54,6 +48,13 @@ struct globals {
 	SET_PTR_TO_GLOBALS(xzalloc(sizeof(G))); \
 } while (0)
 
+#define nbar_width	ns[0]	// progress bar width
+#define nbar_height	ns[1]	// progress bar height
+#define nbar_posx	ns[2]	// progress bar horizontal position
+#define nbar_posy	ns[3]	// progress bar vertical position
+#define nbar_colr	ns[4]	// progress bar color red component
+#define nbar_colg	ns[5]	// progress bar color green component
+#define nbar_colb	ns[6]	// progress bar color blue component
 
 #if DEBUG
 #define DEBUG_MESSAGE(strMessage, args...) \
@@ -280,77 +281,32 @@ static void fb_drawimage(void)
 static void init(const char *cfg_filename)
 {
 	static const char const param_names[] ALIGN1 =
-		"BAR_LEFT\0" "BAR_TOP\0"
 		"BAR_WIDTH\0" "BAR_HEIGHT\0"
+		"BAR_LEFT\0" "BAR_TOP\0"
 		"BAR_R\0" "BAR_G\0" "BAR_B\0"
 #if DEBUG
 		"DEBUG\0"
 #endif
 		;
 
-	FILE *inifile;
-	char *buf;
-
-	inifile = xfopen_stdin(cfg_filename);
-
-	while ((buf = xmalloc_fgetline(inifile)) != NULL) {
-		char *value_str;
-		int val;
-
-		if (*buf == '#') {  // it's a comment
-			free(buf);
-			continue;
-		}
-
-		value_str = strchr(buf, '=');
-		if (!value_str)
-			goto err;
-		*value_str++ = '\0';
-		val = xatoi_u(value_str);
-
-		switch (index_in_strings(param_names, buf)) {
-		case 0:
-			// progress bar horizontal position
-			G.nbar_posx = val;
-			break;
-		case 1:
-			// progress bar vertical position
-			G.nbar_posy = val;
-			break;
-		case 2:
-			// progress bar width
-			G.nbar_width = val;
-			break;
-		case 3:
-			// progress bar height
-			G.nbar_height = val;
-			break;
-		case 4:
-			// progress bar color - red component
-			G.nbar_colr = val;
-			break;
-		case 5:
-			// progress bar color - green component
-			G.nbar_colg = val;
-			break;
-		case 6:
-			// progress bar color - blue component
-			G.nbar_colb = val;
-			break;
+	char *token[2];
+	parser_t *parser = config_open2(cfg_filename, xfopen_stdin);
+	while (config_read(parser, token, 2, 2, "#=", PARSE_MIN_DIE)) {
+		unsigned val = xatoi_u(token[1]);
+		int i = index_in_strings(param_names, token[0]);
+		if (i < 0)
+			bb_error_msg_and_die("syntax error: '%s'", token[0]);
+		if (i >= 0 && i < 7)
+			G.ns[i] = val;
 #if DEBUG
-		case 7:
+		if (i == 7) {
 			G.bdebug_messages = val;
 			if (G.bdebug_messages)
 				G.logfile_fd = xfopen_for_write("/tmp/fbsplash.log");
-			break;
-#endif
- err:
-		default:
-			bb_error_msg_and_die("syntax error: '%s'", buf);
 		}
-		free(buf);
+#endif
 	}
-	fclose(inifile);
+	config_close(parser);
 }
 
 
diff --git a/modutils/modprobe-small.c b/modutils/modprobe-small.c
index f75dae8..1654cc5 100644
--- a/modutils/modprobe-small.c
+++ b/modutils/modprobe-small.c
@@ -485,23 +485,19 @@ static module_info* find_alias(const char *alias)
 }
 
 #if ENABLE_FEATURE_MODPROBE_SMALL_CHECK_ALREADY_LOADED
+// TODO: open only once, invent config_rewind()
 static int already_loaded(const char *name)
 {
 	int ret = 0;
-	int len = strlen(name);
-	char *line;
-	FILE* modules;
-
-	modules = xfopen_for_read("/proc/modules");
-	while ((line = xmalloc_fgets(modules)) != NULL) {
-		if (strncmp(line, name, len) == 0 && line[len] == ' ') {
-			free(line);
+	char *s;
+	parser_t *parser = config_open2("/proc/modules", xfopen_for_read);
+	while (config_read(parser, &s, 1, 1, "# \t", 0)) {
+		if (strcmp(s, name) == 0) {
 			ret = 1;
 			break;
 		}
-		free(line);
 	}
-	fclose(modules);
+	config_close(parser);
 	return ret;
 }
 #else
diff --git a/networking/libiproute/rt_names.c b/networking/libiproute/rt_names.c
index b22df9c..1a2d52e 100644
--- a/networking/libiproute/rt_names.c
+++ b/networking/libiproute/rt_names.c
@@ -13,41 +13,27 @@
 #include "libbb.h"
 #include "rt_names.h"
 
+/* so far all callers have size == 256 */
+#define rtnl_tab_initialize(file, tab, size) rtnl_tab_initialize(file, tab)
+#define size 256
 static void rtnl_tab_initialize(const char *file, const char **tab, int size)
 {
-	char buf[512];
-	FILE *fp;
-
-	fp = fopen_for_read(file);
-	if (!fp)
+	char *token[2];
+	parser_t *parser = config_open2(file, fopen_for_read);
+	if (!parser)
 		return;
-	while (fgets(buf, sizeof(buf), fp)) {
-		char *p = buf;
-		int id;
-		char namebuf[512];
-
-		while (*p == ' ' || *p == '\t')
-			p++;
-		if (*p == '#' || *p == '\n' || *p == 0)
-			continue;
-		if (sscanf(p, "0x%x %s\n", &id, namebuf) != 2
-		 && sscanf(p, "0x%x %s #", &id, namebuf) != 2
-		 && sscanf(p, "%d %s\n", &id, namebuf) != 2
-		 && sscanf(p, "%d %s #", &id, namebuf) != 2
-		) {
-			bb_error_msg("database %s is corrupted at %s",
-				file, p);
-			return;
+	while (config_read(parser, token, 2, 2, "# \t", 0)) {
+		int id = bb_strtou(token[0], NULL, 0);
+		if (id < 0 || id > size) {
+			bb_error_msg("database %s is corrupted at line %d",
+				file, parser->lineno);
+			break;
 		}
-
-		if (id < 0 || id > size)
-			continue;
-
-		tab[id] = xstrdup(namebuf);
+		tab[id] = xstrdup(token[1]);
 	}
-	fclose(fp);
+	config_close(parser);
 }
-
+#undef size
 
 static const char **rtnl_rtprot_tab; /* [256] */