libbb: [x]fopen_for_{read,write} introduced and used.

 (by Valdimir)

function                                             old     new   delta
config_open2                                           -      41     +41
config_read                                          507     542     +35
find_pair                                            169     187     +18
fopen_for_write                                        -      14     +14
fopen_for_read                                         -      14     +14
find_main                                            406     418     +12
xfopen_for_write                                       -      10     +10
xfopen_for_read                                        -      10     +10
popstring                                            134     140      +6
parse_inittab                                        396     401      +5
next_token                                           923     928      +5
pack_gzip                                           1659    1661      +2
bb__parsespent                                       117     119      +2
fallbackSort                                        1719    1717      -2
evalvar                                             1376    1374      -2
qrealloc                                              36      33      -3
...
...
...
...
singlemount                                         4579    4569     -10
process_stdin                                        443     433     -10
patch_main                                          1111    1101     -10
ifupdown_main                                       2175    2165     -10
file_action_grep                                      90      80     -10
uuidcache_init                                       649     637     -12
hush_main                                            797     785     -12
read_config                                          230     217     -13
dpkg_main                                           3835    3820     -15
read_line_input                                     3134    3110     -24
sysctl_main                                          232     203     -29
config_open                                           40      10     -30
WARN_BAD_LINE                                         44       -     -44
login_main                                          1714    1575    -139
------------------------------------------------------------------------------
(add/remove: 5/1 grow/shrink: 8/74 up/down: 174/-737)        Total: -563 bytes

6 files changed, 6 insertions, 8 deletions

diff --git a/miscutils/crond.c b/miscutils/crond.c
index c7ee793a5..b3a06a376 100644
--- a/miscutils/crond.c
+++ b/miscutils/crond.c
@@ -529,7 +529,7 @@ static void CheckUpdates(void)
 	FILE *fi;
 	char buf[256];
 
-	fi = fopen(CRONUPDATE, "r");
+	fi = fopen_for_read(CRONUPDATE);
 	if (fi != NULL) {
 		unlink(CRONUPDATE);
 		while (fgets(buf, sizeof(buf), fi) != NULL) {
diff --git a/miscutils/devfsd.c b/miscutils/devfsd.c
index c85ff08f3..61b97dce4 100644
--- a/miscutils/devfsd.c
+++ b/miscutils/devfsd.c
@@ -459,7 +459,7 @@ static void read_config_file(char *path, int optional, unsigned long *event_mask
 			free(p);
 			return;
 		}
-		fp = fopen(path, "r");
+		fp = fopen_for_read(path);
 		if (fp != NULL) {
 			while (fgets(buf, STRING_LENGTH, fp) != NULL) {
 				/*  Skip whitespace  */
diff --git a/miscutils/fbsplash.c b/miscutils/fbsplash.c
index 67847c1eb..380f09bea 100644
--- a/miscutils/fbsplash.c
+++ b/miscutils/fbsplash.c
@@ -341,7 +341,7 @@ static void init(const char *cfg_filename)
 		case 7:
 			G.bdebug_messages = val;
 			if (G.bdebug_messages)
-				G.logfile_fd = xfopen("/tmp/fbsplash.log", "w");
+				G.logfile_fd = xfopen_for_write("/tmp/fbsplash.log");
 			break;
 #endif
  err:
diff --git a/miscutils/less.c b/miscutils/less.c
index 1e22d333d..530a40a8c 100644
--- a/miscutils/less.c
+++ b/miscutils/less.c
@@ -1129,7 +1129,7 @@ static void save_input_to_file(void)
 	print_statusline("Log file: ");
 	current_line = less_gets(sizeof("Log file: ")-1);
 	if (current_line[0]) {
-		fp = fopen(current_line, "w");
+		fp = fopen_for_write(current_line);
 		if (!fp) {
 			msg = "Error opening log file";
 			goto ret;
diff --git a/miscutils/makedevs.c b/miscutils/makedevs.c
index 3b45d70b4..ed08f7ece 100644
--- a/miscutils/makedevs.c
+++ b/miscutils/makedevs.c
@@ -80,7 +80,7 @@ int makedevs_main(int argc, char **argv)
 
 	getopt32(argv, "d:", &line);
 	if (line)
-		table = xfopen(line, "r");
+		table = xfopen_for_read(line);
 
 	if (optind >= argc || (rootdir=argv[optind])==NULL) {
 		bb_error_msg_and_die("root directory not specified");
diff --git a/miscutils/man.c b/miscutils/man.c
index 7ef5941a1..df00c3ee7 100644
--- a/miscutils/man.c
+++ b/miscutils/man.c
@@ -106,9 +106,7 @@ int man_main(int argc UNUSED_PARAM, char **argv)
 	if (parser) {
 		/* go through man configuration file and search relevant paths, sections */
 		char *token[2];
-		while (config_read(parser, token, 2, 0, "# \t", PARSE_LAST_IS_GREEDY)) {
-			if (!token[1])
-				continue;
+		while (config_read(parser, token, 2, 2, "# \t", PARSE_LAST_IS_GREEDY)) {
 			if (strcmp("MANPATH", token[0]) == 0) {
 				man_path_list[count_mp] = xstrdup(token[1]);
 				count_mp++;