*: 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, 3 insertions, 0 deletions

diff --git a/include/libbb.h b/include/libbb.h
index c6c2be244..99d681dbe 100644
--- a/include/libbb.h
+++ b/include/libbb.h
@@ -333,6 +333,7 @@ int xopen(const char *pathname, int flags);
 int xopen3(const char *pathname, int flags, int mode);
 int open_or_warn(const char *pathname, int flags);
 int open3_or_warn(const char *pathname, int flags, int mode);
+int open_or_warn_stdin(const char *pathname);
 void xrename(const char *oldpath, const char *newpath);
 int rename_or_warn(const char *oldpath, const char *newpath);
 off_t xlseek(int fd, off_t offset, int whence);
@@ -559,6 +560,7 @@ extern FILE *xfopen(const char *filename, const char *mode);
 /* Prints warning to stderr and returns NULL on failure: */
 extern FILE *fopen_or_warn(const char *filename, const char *mode);
 /* "Opens" stdin if filename is special, else just opens file: */
+extern FILE *xfopen_stdin(const char *filename);
 extern FILE *fopen_or_warn_stdin(const char *filename);
 
 int bb_pstrcmp(const void *a, const void *b);
@@ -741,6 +743,7 @@ void bb_sanitize_stdio(void);
 int sanitize_env_if_suid(void);
 
 
+extern const char *const bb_argv_dash[]; /* "-", NULL */
 extern const char *opt_complementary;
 #if ENABLE_GETOPT_LONG
 #define No_argument "\0"