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nsh:support $! get last pid use nsh run

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test:
    nsh> hello &
    hello [4:100]
    nsh> Hello, World!!

    nsh> echo $!
    4
    nsh> echo $!
    3
    nsh> ps
      PID GROUP PRI POLICY   TYPE    NPX STATE    EVENT     SIGMASK           STACK COMMAND
        0     0   0 FIFO     Kthread   - Ready              0000000000000000 0069616 Idle_Task
        1     1 224 FIFO     Kthread   - Waiting  Signal    0000000000000000 0067536 loop_task
        2     2 224 FIFO     Kthread   - Waiting  Semaphore 0000000000000000 0067504 hpwork 0x45ae80 0x45aea8
        3     3 100 FIFO     Task      - Running            0000000000000000 0067536 nsh_main
    nsh>

Signed-off-by: anjiahao <anjiahao@xiaomi.com>
This commit is contained in:
anjiahao
2023-12-25 20:34:34 +08:00
committed by Xiang Xiao
parent 55df3019f9
commit 5dcfe93a95
5 changed files with 14 additions and 0 deletions
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1
nshlib/nsh_builtin.c
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@@ -121,6 +121,7 @@ int nsh_builtin(FAR struct nsh_vtbl_s *vtbl, FAR const char *cmd,
* foreground
*/
vtbl->np.np_lastpid = ret;
#ifdef CONFIG_SCHED_WAITPID
/* CONFIG_SCHED_WAITPID is selected, so we may run the command in