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Sat, 12 Jul 2025 06:42:48 -0700 (PDT) Received: from eric-wcnlab.tail151456.ts.net ([2001:288:7001:1099:90c1:8214:37cf:b3e5]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-23de42ae865sm64193205ad.72.2025.07.12.06.42.47 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Sat, 12 Jul 2025 06:42:48 -0700 (PDT) From: Cheng-Yang Chou To: williams@redhat.com, jkacur@redhat.com Cc: linux-rt-users@vger.kernel.org, jserv@ccns.ncku.edu.tw, yphbchou0911@gmail.com Subject: [PATCH 7/8] sigwaittest.c: Suppress warning Date: Sat, 12 Jul 2025 21:42:12 +0800 Message-ID: <20250712134213.58582-8-yphbchou0911@gmail.com> X-Mailer: git-send-email 2.48.1 In-Reply-To: <20250712134213.58582-1-yphbchou0911@gmail.com> References: <20250712134213.58582-1-yphbchou0911@gmail.com> Precedence: bulk X-Mailing-List: linux-rt-users@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Signed-off-by: Cheng-Yang Chou --- src/sigwaittest/sigwaittest.c | 13 +++++++++++-- 1 file changed, 11 insertions(+), 2 deletions(-) diff --git a/src/sigwaittest/sigwaittest.c b/src/sigwaittest/sigwaittest.c index 026cc81..3944b54 100644 --- a/src/sigwaittest/sigwaittest.c +++ b/src/sigwaittest/sigwaittest.c @@ -72,6 +72,7 @@ void *semathread(void *param) cpu_set_t mask; int policy = SCHED_FIFO; struct sched_param schedp; + int ret; memset(&schedp, 0, sizeof(schedp)); schedp.sched_priority = par->priority; @@ -168,7 +169,10 @@ void *semathread(void *param) int tracing_enabled = open(tracing_enabled_file, O_WRONLY); if (tracing_enabled >= 0) { - write(tracing_enabled, "0", 1); + ret = write(tracing_enabled, "0", 1); + if (ret < 0) + fatal("Could not write to %s: %s\n", + tracing_enabled_file, strerror(errno)); close(tracing_enabled); } else fatal("Could not access %s\n", @@ -489,7 +493,12 @@ int main(int argc, char *argv[]) fprintf(stderr, "Could not create shared memory\n"); return 1; } - ftruncate(shmem, totalsize); + if (ftruncate(shmem, totalsize) == -1) { + perror("ftruncate failed"); + close(shmem); + shm_unlink("/sigwaittest"); + return 1; + } param = mmap(0, totalsize, PROT_READ|PROT_WRITE, MAP_SHARED, shmem, 0); if (param == MAP_FAILED) { -- 2.48.1