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-rw-r--r--usr.bin/truss/main.c6
1 files changed, 6 insertions, 0 deletions
diff --git a/usr.bin/truss/main.c b/usr.bin/truss/main.c
index d0dd073..586fcd6 100644
--- a/usr.bin/truss/main.c
+++ b/usr.bin/truss/main.c
@@ -239,6 +239,12 @@ main(int ac, char **av)
if ((trussinfo->outfile = fopen(fname, "w")) == NULL)
errx(1, "cannot open %s", fname);
}
+ /*
+ * Set FD_CLOEXEC, so that the output file is not shared with
+ * the traced process.
+ */
+ if (fcntl(fileno(trussinfo->outfile), F_SETFD, FD_CLOEXEC) == -1)
+ warn("fcntl()");
/*
* If truss starts the process itself, it will ignore some signals --
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