*: shrink by using [f]open_or_warn_stdin where appropriate

function                                             old     new   delta
lsattr_main                                           62     143     +81
open_or_warn_stdin                                     -      36     +36
fclose_if_not_stdin                                   20      47     +27
xfopen_stdin                                           -      20     +20
tac_main                                             336     356     +20
cksum_main                                           249     259     +10
bb_argv_dash                                           -       8      +8
su_main                                              448     455      +7
cmp_main                                             630     633      +3
passwd_main                                         1072    1074      +2
uudecode_main                                        317     315      -2
text_yank                                            110     108      -2
handle_incoming_and_exit                            2653    2651      -2
flags                                                  5       1      -4
write_leases                                         235     230      -5
fopen_or_warn_stdin                                   48      42      -6
fold_main                                            648     642      -6
static.argv_dash                                       8       -      -8
sum_main                                             142     128     -14
tail_main                                           1237    1221     -16
sed_main                                             711     695     -16
cmp_xfopen_input                                      17       -     -17
bb_cat                                               113      96     -17
catv_main                                            328     306     -22
strings_main                                         457     434     -23
hash_file                                            298     274     -24
sum_file                                             353     325     -28
sort_main                                            904     859     -45
expand_main                                          736     686     -50
cut_main                                            1116    1065     -51
md5_sha1_sum_main                                    549     493     -56
lsattr_args                                           90       -     -90
read_stduu                                           408     255    -153
------------------------------------------------------------------------------
(add/remove: 3/3 grow/shrink: 7/20 up/down: 214/-657)        Total: -443 bytes
   text    data     bss     dec     hex filename
 797417     658    7428  805503   c4a7f busybox_old
 796973     658    7428  805059   c48c3 busybox_unstripped

1 files changed, 2 insertions, 4 deletions

diff --git a/miscutils/strings.c b/miscutils/strings.c
index 57a2c0a17..5efbabf6f 100644
--- a/miscutils/strings.c
+++ b/miscutils/strings.c
@@ -23,7 +23,7 @@ int strings_main(int argc ATTRIBUTE_UNUSED, char **argv)
         unsigned opt;
         unsigned count;
         off_t offset;
-        FILE *file = stdin;
+        FILE *file;
         char *string;
         const char *fmt = "%s: ";
         const char *n_arg = "4";
@@ -40,16 +40,14 @@ int strings_main(int argc ATTRIBUTE_UNUSED, char **argv)
         if (!*argv) {
                 fmt = "{%s}: ";
                 *--argv = (char *)bb_msg_standard_input;
-                goto PIPE;
         }
 
         do {
-                file = fopen_or_warn(*argv, "r");
+                file = fopen_or_warn_stdin(*argv);
                 if (!file) {
                         status = EXIT_FAILURE;
                         continue;
                 }
- PIPE:
                 offset = 0;
                 count = 0;
                 do {