From 5d1646d90e1f2cceb9f0828f4b28318cd0ec7744 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Sat, 27 Apr 2024 12:05:51 +0200 Subject: Adding upstream version 5.10.209. Signed-off-by: Daniel Baumann --- tools/testing/selftests/proc/proc-self-wchan.c | 40 ++++++++++++++++++++++++++ 1 file changed, 40 insertions(+) create mode 100644 tools/testing/selftests/proc/proc-self-wchan.c (limited to 'tools/testing/selftests/proc/proc-self-wchan.c') diff --git a/tools/testing/selftests/proc/proc-self-wchan.c b/tools/testing/selftests/proc/proc-self-wchan.c new file mode 100644 index 000000000..b467b98a4 --- /dev/null +++ b/tools/testing/selftests/proc/proc-self-wchan.c @@ -0,0 +1,40 @@ +/* + * Copyright © 2018 Alexey Dobriyan + * + * Permission to use, copy, modify, and distribute this software for any + * purpose with or without fee is hereby granted, provided that the above + * copyright notice and this permission notice appear in all copies. + * + * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES + * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF + * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR + * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES + * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN + * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF + * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. + */ +#include +#include +#include +#include +#include + +int main(void) +{ + char buf[64]; + int fd; + + fd = open("/proc/self/wchan", O_RDONLY); + if (fd == -1) { + if (errno == ENOENT) + return 4; + return 1; + } + + buf[0] = '\0'; + if (read(fd, buf, sizeof(buf)) != 1) + return 1; + if (buf[0] != '0') + return 1; + return 0; +} -- cgit v1.2.3