Linux C下如何查看进程数

来源：互联网发布：统计型定位算法模型编辑：程序博客网时间：2024/06/07 05:14

第一步：通过PS命令查看进度 ID号。

第二步：在proc下查看该进程号起了几个进程。

第三步：通过 ls |wc -l查看显示的进程数。

# ps
PID   USER     COMMAND
    1 root     init
    2 root     [kthreadd]
    3 root     [ksoftirqd/0]
    4 root     [kworker/0:0]
    5 root     [kworker/0:0H]
    7 root     [khelper]
    8 root     [kdevtmpfs]
    9 root     [writeback]
   10 root     [kworker/u2:1]
   11 root     [bioset]
   12 root     [crypto]
   13 root     [kblockd]
   15 root     [khubd]
   16 root     [cfg80211]
   17 root     [kworker/0:1]
   19 root     [rpciod]
   20 root     [kswapd0]
   21 root     [fsnotify_mark]
   22 root     [nfsiod]
397 root     [target_completi]
398 root     [tmr-rd_mcp]
400 root     [xcopy_wq]
402 root     [spi32766]
424 root     [spi32765]
488 root     [ipv6_addrconf]
489 root     [deferwq]
490 root     [kworker/u2:2]
541 root     [mmcqd/0]
547 root     [ext4-rsv-conver]
559 root     /sbin/syslogd -n
561 root     /sbin/klogd -n
580 root     telnetd
612 root     ./daemon
616 root     /root/billcapture
645 root     udhcpc -i eth0
651 root     -sh
656 root     ps

# cd /proc/616/fd
# ls
0 1 2 3 4 5 6 7 8
# ls |wc -l
9
# ls
0 1 2 3 4 5 6 7 8

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