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

3 files changed, 6 insertions, 6 deletions

diff --git a/editors/awk.c b/editors/awk.c
index 7af9e1eeb..571d68193 100644
--- a/editors/awk.c
+++ b/editors/awk.c
@@ -2400,7 +2400,7 @@ static var *evaluate(node *op, var *res)
 						X.rsm->F = popen(L.s, "r");
 						X.rsm->is_pipe = TRUE;
 					} else {
-						X.rsm->F = fopen(L.s, "r");		/* not xfopen! */
+						X.rsm->F = fopen_for_read(L.s);		/* not xfopen! */
 					}
 				}
 			} else {
diff --git a/editors/patch.c b/editors/patch.c
index d5f6df275..e8482a7a9 100644
--- a/editors/patch.c
+++ b/editors/patch.c
@@ -131,9 +131,9 @@ int patch_main(int argc UNUSED_PARAM, char **argv)
 		} else {
 			backup_filename = xasprintf("%s.orig", new_filename);
 			xrename(new_filename, backup_filename);
-			src_stream = xfopen(backup_filename, "r");
+			src_stream = xfopen_for_read(backup_filename);
 		}
-		dst_stream = xfopen(new_filename, "w");
+		dst_stream = xfopen_for_write(new_filename);
 		fchmod(fileno(dst_stream), saved_stat.st_mode);
 
 		printf("patching file %s\n", new_filename);
diff --git a/editors/sed.c b/editors/sed.c
index 67e88418a..496d3d22e 100644
--- a/editors/sed.c
+++ b/editors/sed.c
@@ -438,7 +438,7 @@ static const char *parse_cmd_args(sed_cmd_t *sed_cmd, const char *cmdstr)
 			bb_error_msg_and_die("command only uses one address");
 		cmdstr += parse_file_cmd(/*sed_cmd,*/ cmdstr, &sed_cmd->string);
 		if (sed_cmd->cmd == 'w') {
-			sed_cmd->sw_file = xfopen(sed_cmd->string, "w");
+			sed_cmd->sw_file = xfopen_for_write(sed_cmd->string);
 			sed_cmd->sw_last_char = '\n';
 		}
 	/* handle branch commands */
@@ -1025,7 +1025,7 @@ static void process_files(void)
 			{
 				FILE *rfile;
 
-				rfile = fopen(sed_cmd->string, "r");
+				rfile = fopen_for_read(sed_cmd->string);
 				if (rfile) {
 					char *line;
 
@@ -1271,7 +1271,7 @@ int sed_main(int argc UNUSED_PARAM, char **argv)
 	while (opt_f) { // -f
 		char *line;
 		FILE *cmdfile;
-		cmdfile = xfopen(llist_pop(&opt_f), "r");
+		cmdfile = xfopen_for_read(llist_pop(&opt_f));
 		while ((line = xmalloc_fgetline(cmdfile)) != NULL) {
 			add_cmd(line);
 			free(line);