JianyuWang0623 opened a new pull request, #2850:
URL: https://github.com/apache/nuttx-apps/pull/2850
## Summary
Fix variable arguments concat error of `nsh_execute()`
#### Without this patch
```
nsh> set time 5
nsh> echo $time
5
nsh> sleep $time &
sh [5:100]
nsh> nsh: sleep: missing required argument(s)
```
#### With this patch
```
nsh> set time 5
nsh> echo $time
5
nsh> sleep $time &
sh [4:100]
nsh> ps
PID GROUP PRI POLICY TYPE NPX STATE EVENT SIGMASK
STACK COMMAND
0 0 0 FIFO Kthread - Ready 0000000000000000
0069616 Idle_Task
1 0 224 FIFO Kthread - Waiting Signal 0000000000000000
0067536 loop_task
2 0 224 FIFO Kthread - Waiting Semaphore 0000000000000000
0067504 hpwork 0x501760e0 0x50176128
3 3 100 FIFO Task - Running 0000000000000000
0067536 nsh_main
4 4 100 FIFO Task - Waiting Signal 0000000000000000
0067520 sh -c sleep
```
**Reported by [email protected], owned by @jasonbu,** updated by
@JianyuWang0623
## Impact
nshlib/nsh_parse:nsh_execute()
## Testing
1. Selftest as above/commit message
2. NuttX CI
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