I still consider uclibc broken in this respect.
However, the important case is with zero precision. In this case the
pointer value shouldn't matter, and uclibc does break existing software.
I stumbled on this trying out pjsip, a freely available SIP library.
This patch takes care of this specific case only, and with minimal
intrusion.
Signed-off-by: Jones Desougi <[email protected]>
diff --git a/libc/stdio/_vfprintf.c b/libc/stdio/_vfprintf.c
index 3b00708..a9bed6a 100644
--- a/libc/stdio/_vfprintf.c
+++ b/libc/stdio/_vfprintf.c
@@ -1670,6 +1670,9 @@ static int _do_one_spec(FILE * __restrict stream,
#endif
s = "(null)";
slen = 6;
+ /* If precision is zero, the pointer is of no importance. */
+ if (ppfs->info.prec == 0)
+ slen = 0;
}
} else { /* char */
s = buf;
@@ -1726,6 +1729,9 @@ static int _do_one_spec(FILE * __restrict stream,
NULL_STRING:
s = "(null)";
SLEN = slen = 6;
+ /* If precision is zero, the pointer is of no importance. */
+ if (ppfs->info.prec == 0)
+ SLEN = slen = 0;
}
} else { /* char */
*wbuf = btowc( (unsigned char)(*((const int *) *argptr)) );
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