我正在编写代码以杀死进程和所有子进程。
根据this post，使用os.killpg(pro.pid, signal.SIGTERM)
在测试过程中，我手动启动了这个过程，产生了5个子过程。
UID PID PPID C STIME TTY TIME CMD
ddd 25066 19475 0 Nov03 ? 00:00:00 /bin/sh -c gtdownload -c ~/.cghub.key --max-children 4 -vv -d https://cghub.ucsc.edu/cghub/data/analysis/download/ab0e89b4-5310-11e4-88da-adc9fc308db6 2
ddd 25067 25066 0 Nov03 ? 00:00:07 /rsrch1/rists/djiao/apps/cghub/libexec/gtdownload -c /rsrch1/rists/djiao/.cghub.key --max-children 4 -vv -d https://cghub.ucsc.edu/cghub/data/analysis/d
ddd 25073 25067 0 Nov03 ? 00:00:18 /rsrch1/rists/djiao/apps/cghub/libexec/gtdownload -c /rsrch1/rists/djiao/.cghub.key --max-children 4 -vv -d https://cghub.ucsc.edu/cghub/data/analysis/d
ddd 25077 25067 0 Nov03 ? 00:00:18 /rsrch1/rists/djiao/apps/cghub/libexec/gtdownload -c /rsrch1/rists/djiao/.cghub.key --max-children 4 -vv -d https://cghub.ucsc.edu/cghub/data/analysis/d
ddd 25081 25067 0 Nov03 ? 00:00:18 /rsrch1/rists/djiao/apps/cghub/libexec/gtdownload -c /rsrch1/rists/djiao/.cghub.key --max-children 4 -vv -d https://cghub.ucsc.edu/cghub/data/analysis/d
ddd 25085 25067 0 Nov03 ? 00:00:18 /rsrch1/rists/djiao/apps/cghub/libexec/gtdownload -c /rsrch1/rists/djiao/.cghub.key --max-children 4 -vv -d https://cghub.ucsc.edu/cghub/data/analysis/d
然而，当我运行os.killpg（25066，signal.SIGTERM）时，我收到错误“OSError：[Errno 3]没有这样的过程”。为什么不能找到具有该ID的进程？
答案 0 :(得分：0)
在调用os.setpgrp()之前，您需要使用os.killpg()设置流程组。
如果您未设置任何进程组，则无法使用os.killpg()
您可以使用以下方式创建流程组：
os.setpgrp() # If no argument is passed then it is equivalent to os.setpgrp(0,0). This will create a process group with id same as the calling process id. os.setpgrp(0, 999) #It will create a process group with id 999 and the current process will be part of that group. You can use any process id instead of 0 to make it part of that process group. os.setpgrp()实际上调用了linux系统调用setpgrp()。有关详细信息，请参见以下linux手册页
https://linux.die.net/man/2/setpgrp