hujun260 opened a new pull request, #3309:
URL: https://github.com/apache/nuttx-apps/pull/3309
## Summary
sighand: need block WAKEUP_SIGNAL in current tcb
If the main thread receives the signal, the waiter_main will not be awakened.
## Impact
sighand
## Testing
test in hardware esp32s3-devkit:nsh
nsh>
nsh>
nsh> ps
TID PID PPID PRI POLICY TYPE NPX STATE EVENT SIGMASK
STACK COMMAND
0 0 0 0 FIFO Kthread - Ready
0000000000000000 0003056 Idle_Task
1 1 0 100 RR Task - Running
0000000000000000 0003016 nsh_main
nsh> uname -a
NuttX 12.12.0 a5fdde65305-dirty Jan 11 2026 17:49:38 xtensa esp32s3-devkit
nsh> ostest
stdio_test: write fd=1
stdio_test: Standard I/O Check: printf
stdio_test: write fd=2
stdio_test: Standard I/O Check: fprintf to stderr
ostest_main: putenv(Variable1=BadValue3)
ostest_main: setenv(Variable1, GoodValue1, TRUE)
ostest_main: setenv(Variable2, BadValue1, FALSE)
ostest_main: setenv(Variable2, GoodValue2, TRUE)
ostest_main: setenv(Variable3, GoodValue3, FALSE)
ostest_main: setenv(Variable3, BadValue2, FALSE)
show_variable: Variable=Variable1 has value=GoodValue1
show_variable: Variable=Variable2 has value=GoodValue2
show_variable: Variable=Variable3 has value=GoodValue3
ostest_main: Started user_main at PID=3
user_main: Begin argument test
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