I want to get PPID of chromium browser. When I launch chromium-browser it launches many child processes with the same name.
For example:
$ pidof /usr/lib/chromium-browser/chromium-browser
8963 8888 8710 7255 7074 6546 6540 6536 6532 6528 6524 6520 6516 6512 6506 6379 6357 6282 6258 6167 4977 2452
If I try to obtain PPID from child processes like:
$ echo $(ps -o ppid= -p $(pidof -s /usr/lib/chromium-browser/chromium-browser))
6282
It prints PPID of chromium browser but it's not the topmost PID of chromium-browser according to pstree:
├─chromium-browse(6167)─┬─chromium-browse(6258)───chromium-browse(6282)─┬─chromium-browse(2452)─┬─{chromium-browse}(2460)
│ │ │ ├─{chromium-browse}(2461)
│ │ │ ├─{chromium-browse}(2467)
│ │ │ ├─{chromium-browse}(2527)
│ │ │ ├─{chromium-browse}(2574)
│ │ │ ├─{chromium-browse}(2918)
│ │ │ ├─{chromium-browse}(3711)
│ │ │ └─{chromium-browse}(3984)
│ │ ├─chromium-browse(4977)─┬─{chromium-browse}(4996)
│ │ │ ├─{chromium-browse}(5015)
│ │ │ ├─{chromium-browse}(5016)
│ │ │ ├─{chromium-browse}(5087)
│ │ │ ├─{chromium-browse}(5170)
│ │ │ ├─{chromium-browse}(5358)
│ │ │ ├─{chromium-browse}(831)
│ │ │ └─{chromium-browse}(832)
│ │ ├─chromium-browse(6506)─┬─{chromium-browse}(6509)
│ │ │ ├─{chromium-browse}(6607)
│ │ │ ├─{chromium-browse}(6616)
│ │ │ ├─{chromium-browse}(6636)
│ │ │ ├─{chromium-browse}(6754)
│ │ │ ├─{chromium-browse}(6849)
│ │ │ ├─{chromium-browse}(7045)
│ │ │ ├─{chromium-browse}(5651)
│ │ │ └─{chromium-browse}(5652)
│ │ ├─chromium-browse(6512)─┬─{chromium-browse}(6515)
│ │ │ ├─{chromium-browse}(6595)
│ │ │ ├─{chromium-browse}(6613)
│ │ │ ├─{chromium-browse}(6637)
│ │ │ └─{chromium-browse}(6753)
│ │ ├─chromium-browse(6516)─┬─{chromium-browse}(6519)
│ │ │ ├─{chromium-browse}(6602)
│ │ │ ├─{chromium-browse}(6612)
│ │ │ ├─{chromium-browse}(6632)
│ │ │ ├─{chromium-browse}(6761)
│ │ │ ├─{chromium-browse}(2492)
│ │ │ └─{chromium-browse}(6378)
│ │ ├─chromium-browse(6520)─┬─{chromium-browse}(6522)
│ │ │ ├─{chromium-browse}(6600)
│ │ │ ├─{chromium-browse}(6623)
│ │ │ ├─{chromium-browse}(6629)
│ │ │ └─{chromium-browse}(6752)
│ │ ├─chromium-browse(6524)─┬─{chromium-browse}(6527)
│ │ │ ├─{chromium-browse}(6596)
│ │ │ ├─{chromium-browse}(6617)
│ │ │ ├─{chromium-browse}(6638)
│ │ │ └─{chromium-browse}(6766)
│ │ ├─chromium-browse(6528)─┬─{chromium-browse}(6531)
│ │ │ ├─{chromium-browse}(6605)
│ │ │ ├─{chromium-browse}(6622)
│ │ │ ├─{chromium-browse}(6639)
│ │ │ ├─{chromium-browse}(6758)
│ │ │ └─{chromium-browse}(6353)
│ │ ├─chromium-browse(6532)─┬─{chromium-browse}(6534)
│ │ │ ├─{chromium-browse}(6598)
│ │ │ ├─{chromium-browse}(6618)
│ │ │ ├─{chromium-browse}(6642)
│ │ │ ├─{chromium-browse}(6756)
│ │ │ └─{chromium-browse}(6788)
│ │ ├─chromium-browse(6536)─┬─{chromium-browse}(6539)
│ │ │ ├─{chromium-browse}(6599)
│ │ │ ├─{chromium-browse}(6615)
│ │ │ ├─{chromium-browse}(6630)
│ │ │ ├─{chromium-browse}(6751)
│ │ │ ├─{chromium-browse}(6449)
│ │ │ └─{chromium-browse}(6450)
│ │ ├─chromium-browse(6540)─┬─{chromium-browse}(6545)
│ │ │ ├─{chromium-browse}(6601)
│ │ │ ├─{chromium-browse}(6619)
│ │ │ ├─{chromium-browse}(6641)
│ │ │ └─{chromium-browse}(6760)
│ │ ├─chromium-browse(6546)─┬─{chromium-browse}(6549)
│ │ │ ├─{chromium-browse}(6606)
│ │ │ ├─{chromium-browse}(6614)
│ │ │ ├─{chromium-browse}(6631)
│ │ │ └─{chromium-browse}(6759)
│ │ ├─chromium-browse(7074)─┬─{chromium-browse}(7079)
│ │ │ ├─{chromium-browse}(7081)
│ │ │ ├─{chromium-browse}(7082)
│ │ │ ├─{chromium-browse}(7099)
│ │ │ ├─{chromium-browse}(7100)
│ │ │ ├─{chromium-browse}(7103)
│ │ │ └─{chromium-browse}(7109)
│ │ ├─chromium-browse(7255)─┬─{chromium-browse}(7257)
│ │ │ ├─{chromium-browse}(7259)
│ │ │ ├─{chromium-browse}(7260)
│ │ │ ├─{chromium-browse}(7264)
│ │ │ ├─{chromium-browse}(7265)
│ │ │ ├─{chromium-browse}(7268)
│ │ │ └─{chromium-browse}(7270)
│ │ ├─chromium-browse(8710)─┬─{chromium-browse}(8713)
│ │ │ ├─{chromium-browse}(8714)
│ │ │ ├─{chromium-browse}(8715)
│ │ │ ├─{chromium-browse}(8718)
│ │ │ ├─{chromium-browse}(8719)
│ │ │ ├─{chromium-browse}(8850)
│ │ │ ├─{chromium-browse}(17470)
│ │ │ ├─{chromium-browse}(19250)
│ │ │ └─{chromium-browse}(23721)
│ │ ├─chromium-browse(8888)─┬─{chromium-browse}(8891)
│ │ │ ├─{chromium-browse}(8894)
│ │ │ ├─{chromium-browse}(8895)
│ │ │ ├─{chromium-browse}(8899)
│ │ │ ├─{chromium-browse}(8902)
│ │ │ ├─{chromium-browse}(8911)
│ │ │ ├─{chromium-browse}(9469)
│ │ │ └─{chromium-browse}(9471)
│ │ └─chromium-browse(8963)─┬─{chromium-browse}(8968)
│ │ ├─{chromium-browse}(8969)
│ │ ├─{chromium-browse}(8970)
│ │ ├─{chromium-browse}(8971)
│ │ ├─{chromium-browse}(8977)
│ │ └─{chromium-browse}(8989)
│ ├─chromium-browse(6357)─┬─chromium-browse(6379)
│ │ ├─{chromium-browse}(6380)
│ │ ├─{chromium-browse}(6381)
│ │ └─{chromium-browse}(6382)
│ ├─{chromium-browse}(6255)
│ ├─{chromium-browse}(6283)
│ ├─{chromium-browse}(6284)
│ ├─{chromium-browse}(6285)
│ ├─{chromium-browse}(6288)
│ ├─{chromium-browse}(6289)
│ ├─{chromium-browse}(6290)
│ ├─{chromium-browse}(6291)
│ ├─{chromium-browse}(6292)
│ ├─{chromium-browse}(6293)
│ ├─{chromium-browse}(6310)
│ ├─{chromium-browse}(6311)
│ ├─{chromium-browse}(6312)
│ ├─{chromium-browse}(6313)
│ ├─{chromium-browse}(6314)
│ ├─{chromium-browse}(6315)
│ ├─{chromium-browse}(6316)
│ ├─{chromium-browse}(6317)
│ ├─{chromium-browse}(6318)
│ ├─{chromium-browse}(6319)
│ ├─{chromium-browse}(6320)
│ ├─{chromium-browse}(6323)
│ ├─{chromium-browse}(6351)
│ ├─{chromium-browse}(6355)
│ ├─{chromium-browse}(6356)
│ ├─{chromium-browse}(6375)
│ ├─{chromium-browse}(6385)
│ ├─{chromium-browse}(6386)
│ ├─{chromium-browse}(6455)
│ ├─{chromium-browse}(6505)
│ ├─{chromium-browse}(6708)
│ ├─{chromium-browse}(6781)
│ ├─{chromium-browse}(6783)
│ ├─{chromium-browse}(7075)
│ ├─{chromium-browse}(7076)
│ ├─{chromium-browse}(9053)
│ └─{chromium-browse}(9089)
How can get the first branch PID of chromium-browser (├─chromium-browse(6167)─)?
Best Answer
If you're looking for the top level chromium process, it could be the one with parent process id of 1 (init), try using
pgrep -P1 chromiumto find its PID.You may wish to try using
ps efto see processes listed in a tree like structure to find a parent. Note:psswitches areefand not-ef.