From 17e44dc46f035ca27847bbf75ffd3072ed49f13c Mon Sep 17 00:00:00 2001 From: Arnaldo Carvalho de Melo Date: Mon, 23 Mar 2015 18:23:02 -0300 Subject: [PATCH] perf target: Simplify handling of strerror_r return To deal with forwarding the strerror_r (GNU) return we need to check if the returned value is the buffer we passed or maybe some constant (unknown error), simplify that action by using scnprintf, that will do all the buflen size checks, trimming if needed. Acked-by: Jiri Olsa Acked-by: Namhyung Kim Cc: Adrian Hunter Cc: Borislav Petkov Cc: David Ahern Cc: Don Zickus Cc: Frederic Weisbecker Cc: Stephane Eranian Link: http://lkml.kernel.org/n/tip-d0ik6i5gjew56j0qphql28ou@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/util/target.c | 7 ++----- 1 file changed, 2 insertions(+), 5 deletions(-) diff --git a/tools/perf/util/target.c b/tools/perf/util/target.c index e74c5963dc7a..a53603b27e52 100644 --- a/tools/perf/util/target.c +++ b/tools/perf/util/target.c @@ -123,11 +123,8 @@ int target__strerror(struct target *target, int errnum, if (errnum >= 0) { const char *err = strerror_r(errnum, buf, buflen); - if (err != buf) { - size_t len = strlen(err); - memcpy(buf, err, min(buflen - 1, len)); - *(buf + min(buflen - 1, len)) = '\0'; - } + if (err != buf) + scnprintf(buf, buflen, "%s", err); return 0; } -- 2.20.1