别忘了在disown之前执行bg命令，否则进程会一直stopped

最新推荐文章于 2025-02-06 08:17:37 发布

最新推荐文章于 2025-02-06 08:17:37 发布 · 857 阅读

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本文分享了一次在Linux环境下让程序在后台持续运行的经验教训。作者通过实例演示了如何使用bg命令使暂停的程序继续运行，再使用disown命令将其从当前终端分离，避免因关闭终端导致程序停止。强调了在使用disown前必须先用bg命令恢复程序运行状态的重要性。

别忘了在disown之前执行bg命令，否则进程会一直stopped

今天在Linux下测试程序，是直接执行的命令，如下所示：

[root@NODE22 bin]# ./cap
#======= CAP v20120216f =======#
prog-path: /root/work22/ct08/bin/
prog-name: cap
cfg_name='../cfg/cap.cfg'
loadconfig ok
checkconfig ok
System::Init ok
cap start ok, pid 8342

想到这个程序要在我下班之后继续执行，于是我就按下了Ctrl+Z

[1]+ Stopped ./cap

因为我准备关闭SecureCRT准备收工了，所以决定让它脱离我这个终端，执行了disown来做这件事

[root@NODE22 bin]# disown %1
-bash: warning: deleting stopped job 1 with process group 8342
[root@NODE22 bin]#

看看这个操作灵不灵，我看了一下日志，发现日志没有继续往下记录，正常情况应该往下记录的。

想起来，没有在disown之前执行bg命令，程序已经处于Stopped状态（看disown命令的输出），得让它继续往下执行

[root@NODE22 bin]# killall -CONT cap

日志也正常了。切记啊，切记啊：别忘了在disown之前执行bg命令

本文地址： http://codingstandards.iteye.com/blog/1408321

相关帮助信息：

[root@NODE22 eap_designer]# help disown
disown: disown [-h] [-ar] [jobspec ...]
    By default, removes each JOBSPEC argument from the table of active jobs.
    If the -h option is given, the job is not removed from the table, but is
    marked so that SIGHUP is not sent to the job if the shell receives a
    SIGHUP. The -a option, when JOBSPEC is not supplied, means to remove all
    jobs from the job table; the -r option means to remove only running jobs.
[root@NODE22 eap_designer]# help bg
bg: bg [job_spec ...]
    Place each JOB_SPEC in the background, as if it had been started with
    `&'. If JOB_SPEC is not present, the shell's notion of the current
    job is used.
[root@NODE22 eap_designer]# help fg
fg: fg [job_spec]
    Place JOB_SPEC in the foreground, and make it the current job. If
    JOB_SPEC is not present, the shell's notion of the current job is
    used.
[root@NODE22 eap_designer]# help jobs
jobs: jobs [-lnprs] [jobspec ...] or jobs -x command [args]
    Lists the active jobs. The -l option lists process id's in addition
    to the normal information; the -p option lists process id's only.
    If -n is given, only processes that have changed status since the last
    notification are printed. JOBSPEC restricts output to that job. The
    -r and -s options restrict output to running and stopped jobs only,
    respectively. Without options, the status of all active jobs is
    printed. If -x is given, COMMAND is run after all job specifications
    that appear in ARGS have been replaced with the process ID of that job's
    process group leader.
[root@NODE22 eap_designer]#