jasonbu opened a new pull request, #2522:
URL: https://github.com/apache/nuttx-apps/pull/2522

   ## Summary
   the spawn used many times inside nsh, also will case the cmd in g_cmdmap, 
not able to support &, etc.
   we should make all spawn within one entry.
   
   ## Impact
   before fix, spawn feature used many times.
   after fix, spawn from nsh all from nsh_spawn.c
   
   ## Testing
   enable tmpfs and work with qemu-armv8a,
   ```C
   int main(int argc, FAR char *argv[])
   {
     char buffer[100];
     fgets(buffer, 100, stdin);
   
     printf("Hello, World!!\n");
     printf("stdin %s\n", buffer);
     return 0;
   }
   ```
   ```bash
   cd tmp
   hello
   hello > a
   hello < a
   hello >> a
   hello >> a &
   hello < a >> a &
   ```
   works as expect
   
   


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