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-rw-r--r--g10/sign.c21
1 files changed, 19 insertions, 2 deletions
diff --git a/g10/sign.c b/g10/sign.c
index 385254987..a66410ebd 100644
--- a/g10/sign.c
+++ b/g10/sign.c
@@ -1037,6 +1037,9 @@ sign_file (ctrl_t ctrl, strlist_t filenames, int detached, strlist_t locusr,
int multifile = 0;
u32 duration=0;
pt_extra_hash_data_t extrahash = NULL;
+ char peekbuf[32];
+ int peekbuflen = 0;
+
pfx = new_progress_context ();
afx = new_armor_context ();
@@ -1095,6 +1098,14 @@ sign_file (ctrl_t ctrl, strlist_t filenames, int detached, strlist_t locusr,
goto leave;
}
+ peekbuflen = iobuf_ioctl (inp, IOBUF_IOCTL_PEEK, sizeof peekbuf, peekbuf);
+ if (peekbuflen < 0)
+ {
+ peekbuflen = 0;
+ if (DBG_FILTER)
+ log_debug ("peeking at input failed\n");
+ }
+
handle_progress (pfx, inp, fname);
}
@@ -1251,8 +1262,14 @@ sign_file (ctrl_t ctrl, strlist_t filenames, int detached, strlist_t locusr,
{
int compr_algo = opt.compress_algo;
- /* If not forced by user */
- if (compr_algo==-1)
+ if (!opt.explicit_compress_option
+ && is_file_compressed (peekbuf, peekbuflen))
+ {
+ if (opt.verbose)
+ log_info(_("'%s' already compressed\n"), fname? fname: "[stdin]");
+ compr_algo = 0;
+ }
+ else if (compr_algo==-1)
{
/* If we're not encrypting, then select_algo_from_prefs
* will fail and we'll end up with the default. If we are