[dpdk-dev] [PATCH] Remove printf from signal handler.

[Prateek Agarwal]

printf is not async-signal safe. Using printf in signal handlers may lead to 
deadlock. Removed printf from signal handlers present in several applications.

Signed-off-by: Prateek Agarwal <pratee...@cse.iitb.ac.in>
---
 app/pdump/main.c             | 2 --
 app/test-eventdev/evt_main.c | 4 ----
 app/test-flow-perf/main.c    | 3 ---
 app/test-pmd/testpmd.c       | 2 --
 app/test/test_pmd_perf.c     | 1 -
 5 files changed, 12 deletions(-)

diff --git a/app/pdump/main.c b/app/pdump/main.c
index b34bf3353..380f0ea0f 100644
--- a/app/pdump/main.c
+++ b/app/pdump/main.c
@@ -573,8 +573,6 @@ static void
 signal_handler(int sig_num)
 {
        if (sig_num == SIGINT) {
-               printf("\n\nSignal %d received, preparing to exit...\n",
-                               sig_num);
                quit_signal = 1;
        }
 }
diff --git a/app/test-eventdev/evt_main.c b/app/test-eventdev/evt_main.c
index a8d304bab..51d5897f8 100644
--- a/app/test-eventdev/evt_main.c
+++ b/app/test-eventdev/evt_main.c
@@ -22,12 +22,8 @@ signal_handler(int signum)
 {
        int i;
        static uint8_t once;
-
        if ((signum == SIGINT || signum == SIGTERM) && !once) {
                once = true;
-               printf("\nSignal %d received, preparing to exit...\n",
-                               signum);
-
                if (test != NULL) {
                        /* request all lcores to exit from the main loop */
                        *(int *)test->test_priv = true;
diff --git a/app/test-flow-perf/main.c b/app/test-flow-perf/main.c
index 03d01a8b5..aeb0ef3b0 100644
--- a/app/test-flow-perf/main.c
+++ b/app/test-flow-perf/main.c
@@ -1001,9 +1001,6 @@ static void
 signal_handler(int signum)
 {
        if (signum == SIGINT || signum == SIGTERM) {
-               printf("\n\nSignal %d received, preparing to exit...\n",
-                                       signum);
-               printf("Error: Stats are wrong due to sudden signal!\n\n");
                force_quit = true;
        }
 }
diff --git a/app/test-pmd/testpmd.c b/app/test-pmd/testpmd.c
index 33fc0fddf..7ec87e7fd 100644
--- a/app/test-pmd/testpmd.c
+++ b/app/test-pmd/testpmd.c
@@ -3794,8 +3794,6 @@ static void
 signal_handler(int signum)
 {
        if (signum == SIGINT || signum == SIGTERM) {
-               printf("\nSignal %d received, preparing to exit...\n",
-                               signum);
 #ifdef RTE_LIB_PDUMP
                /* uninitialize packet capture framework */
                rte_pdump_uninit();
diff --git a/app/test/test_pmd_perf.c b/app/test/test_pmd_perf.c
index 4db816a36..58cb84401 100644
--- a/app/test/test_pmd_perf.c
+++ b/app/test/test_pmd_perf.c
@@ -319,7 +319,6 @@ signal_handler(int signum)
 {
        /*  USR1 signal, stop testing */
        if (signum == SIGUSR1) {
-               printf("Force Stop!\n");
                stop = 1;
        }
 
-- 
2.25.1