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[PATCH v1 1/3] xentrace: allow xentrace to write to stdout
- To: xen-devel@xxxxxxxxxxxxxxxxxxxx
- From: Olaf Hering <olaf@xxxxxxxxx>
- Date: Fri, 26 May 2023 09:29:14 +0200
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- Cc: George Dunlap <george.dunlap@xxxxxxxxxx>, Wei Liu <wl@xxxxxxx>, Anthony PERARD <anthony.perard@xxxxxxxxxx>
- Delivery-date: Fri, 26 May 2023 07:29:42 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
The output file is optional. In case it is missing, xentrace is supposed
to write to stdout - unless it is a tty, which is checked prior using it.
Signed-off-by: Olaf Hering <olaf@xxxxxxxxx>
---
tools/xentrace/xentrace.c | 8 +++-----
1 file changed, 3 insertions(+), 5 deletions(-)
diff --git a/tools/xentrace/xentrace.c b/tools/xentrace/xentrace.c
index 864e30d50c..b81abe8a51 100644
--- a/tools/xentrace/xentrace.c
+++ b/tools/xentrace/xentrace.c
@@ -1152,11 +1152,9 @@ static void parse_args(int argc, char **argv)
}
}
- /* get outfile (required last argument) */
- if (optind != (argc-1))
- usage();
-
- opts.outfile = argv[optind];
+ /* get outfile (optional last argument) */
+ if (argc > optind)
+ opts.outfile = argv[optind];
}
/* *BSD has no O_LARGEFILE */
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