sed: open input files sequentially to avoid EMFILE

Currently, sed pre-opens all files, which may cause EMFILE errors
on systems with low ulimit -n.  Change sed to open one file at a time.

function                                             old     new   delta
get_next_line                                        177     235     +58
sed_main                                             682     652     -30
------------------------------------------------------------------------------
(add/remove: 0/0 grow/shrink: 1/1 up/down: 58/-30)             Total: 28 bytes

Based on the patch by Daniel Borca <dborca@yahoo.com>

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

1 files changed, 2 insertions, 1 deletions

diff --git a/libbb/fclose_nonstdin.c b/libbb/fclose_nonstdin.c
index 5ce9d5b48..1b1441347 100644
--- a/libbb/fclose_nonstdin.c
+++ b/libbb/fclose_nonstdin.c
@@ -18,7 +18,8 @@ int FAST_FUNC fclose_if_not_stdin(FILE *f)
 {
         /* Some more paranoid applets want ferror() check too */
         int r = ferror(f); /* NB: does NOT set errno! */
-        if (r) errno = EIO; /* so we'll help it */
+        if (r)
+                errno = EIO; /* so we'll help it */
         if (f != stdin)
                 return (r | fclose(f)); /* fclose does set errno on error */
         return r;