Как найти имя процесса по pid - Исправление недочетов и поиск решений вместе с Examum.ru

How to get a process name from his pid ?
For example I execute cat file1.txt, but I want to figure out that cat command and its arguments since its pid in the system. Is there a struct to determine it or something similar? Any idea?

asked Mar 21, 2013 at 10:47

TheForbiddenTheForbidden

1,5334 gold badges22 silver badges30 bronze badges

There is not any general way to do this unix.
Each OS has different ways to handle it and some are very hard. You mention Linux though. With Linux, the info is in the /proc filesystem.
To get the command line for process id 9999, read the file /proc/9999/cmdline.

answered Mar 21, 2013 at 10:56

On linux, you can look in /proc/. Try typing man proc for more information. The contents of /proc/$PID/cmdline will give you the command line that process $PID was run with. There is also /proc/self for examining yourself

An alternative (e.g. on Mac OS X) is to use libproc. See libproc.h.

answered Mar 21, 2013 at 11:00

robbie_crobbie_c

2,3981 gold badge18 silver badges28 bronze badges

POSIX C does NOT support give a standard API for getting the process name by PID.

In linux, you can get the name by LINUX Proc API: /proc/$PID/cmdline. And the code looks like these:

const char* get_process_name_by_pid(const int pid)
{
    char* name = (char*)calloc(1024,sizeof(char));
    if(name){
        sprintf(name, "/proc/%d/cmdline",pid);
        FILE* f = fopen(name,"r");
        if(f){
            size_t size;
            size = fread(name, sizeof(char), 1024, f);
            if(size>0){
                if('n'==name[size-1])
                    name[size-1]='';
            }
            fclose(f);
        }
    }
    return name;
}

answered Mar 6, 2014 at 3:32

QJGuiQJGui

9098 silver badges10 bronze badges

To get the process name of a process id say 9000 use this command:

ps -p 9000 -o comm=

answered Sep 8, 2014 at 6:00

ThunderThunder

2,9641 gold badge24 silver badges19 bronze badges

While this question has been answered, I’d like to add my 2 cents.

In my case, when process 1111 creates process 22222 via pipe (at least this is what I heard), /proc/2222/cmdline does not give correct process name, but instead gives something like 1111_1. I have to use /proc/2222/comm to get the correct process name.

hola

9181 gold badge17 silver badges35 bronze badges

answered Feb 17, 2016 at 15:13

toddwztoddwz

5114 silver badges8 bronze badges

Use the below command in Linux

ls -l /proc/[pid]/exe

It will give the name of the process/application name

Paul Roub

36.3k27 gold badges83 silver badges92 bronze badges

answered Apr 29, 2019 at 12:29

Vikram BVikram B

1171 silver badge6 bronze badges

ps --pid <pid> -o comm h :
This command gives executable file name. For example if you run a script name.sh, then the above command gives output as bash

ps --ppid <pid> -o comm h:
This command gives the output as name

answered Dec 11, 2019 at 6:11

Источник

If I have the PID number for a process (on a UNIX machine), how can I find out the name of its associated process?

What do I have to do?

slhck

221k70 gold badges600 silver badges590 bronze badges

asked Aug 17, 2013 at 7:12

AndreaNobiliAndreaNobili

6,90113 gold badges36 silver badges45 bronze badges

On all POSIX-compliant systems, and with Linux, you can use ps:

ps -p 1337 -o comm=

Here, the process is selected by its PID with -p. The -o option specifies the output format, comm meaning the command name.

For the full command, not just the name of the program, use:

ps -p 1337 -o command

See also: ps – The Open Group Base Specifications Issue 6

answered Aug 17, 2013 at 8:21

You can find the process name or the command used by the process-id or pid from

/proc/<pid>/cmdline

by doing

cat /proc/<pid>/cmdline

Here pid is the pid for which you want to find the name
For example:

 # ps aux

   ................
   ................
   user  2480  0.0  1.2 119100 12728 pts/0  Sl   22:42   0:01 gnome-terminal
   ................
   ................

To find the process name used by pid 2480 you use can

# cat /proc/2480/cmdline 

 gnome-terminal

Vishrant

2373 silver badges6 bronze badges

answered Aug 17, 2013 at 8:04

StormviruxStormvirux

1,0239 silver badges15 bronze badges

To get the path of of the program using a certain pid you can use:

ps ax|egrep "^ [PID]"

alternatively you can use:

ps -a [PID]

Or also:

readlink /proc/[PID]/exe

answered Apr 18, 2015 at 2:16

Pedro LobitoPedro Lobito

7841 gold badge9 silver badges19 bronze badges

You can use pmap.
I am searching for PID 6649. And cutting off the extra process details.

$ pmap 6649 | head -1
6649:   /usr/lib64/firefox/firefox

answered May 27, 2017 at 4:28

# ls -la /proc/ID_GOES_HERE/exe

Example:

# ls -la /proc/1374/exe
lrwxrwxrwx 1 chmm chmm 0 Mai  5 20:46 /proc/1374/exe -> /usr/bin/telegram-desktop

answered May 6, 2016 at 0:14

You can Also use awk in combination with ps

ps aux | awk '$2 == PID number for a process  { print $0 }'

example:

root@cprogrammer:~# ps aux | awk '$2 == 1 { print $0 }'
root         1  0.0  0.2  24476  2436 ?        Ss   15:38   0:01 /sbin/init

to print HEAD LINE you can use

 ps --headers aux |head -n 1 && ps aux | awk '$2 == 1 { print $0 }'

                 (or) 

 ps --headers aux |head -n 1; ps aux | awk '$2 == 1 { print $0 }'


root@cprogrammer:~# ps --headers aux |head -n 1 && ps aux | awk '$2 == 1 { print $0 }'
USER       PID %CPU %MEM    VSZ   RSS TTY      STAT START   TIME COMMAND
root         1  0.0  0.2  24476  2436 ?        Ss   15:38   0:01 /sbin/init

answered Aug 17, 2013 at 9:32

GangadharGangadhar

3911 silver badge6 bronze badges

Simmilar to slhck’s Answer, but relying on file operations instead of command invocations:

MYPID=1
cat "/proc/$MYPID/comm"

answered Aug 30, 2015 at 23:31

ThorSummonerThorSummoner

1,1001 gold badge15 silver badges25 bronze badges

Surprisingly, no one has mentioned the -f (full command) option for ps. I like to use it with -e (everything) and pipe the results to grep so I can narrow my search.

ps -ef | grep <PID>

This is also very useful for looking at full commands that someone is running that are taking a lot of resources on your system. This will show you the options and arguments passed to the command.

answered Feb 23, 2016 at 21:47

jdelaportejdelaporte

1461 silver badge7 bronze badges

I find the easiest method to be with the following command:

ps -awxs | grep pid

Gaff

18.5k15 gold badges57 silver badges68 bronze badges

answered Nov 21, 2016 at 9:48

If you want to see the path of the process by PID. You can use the pwdx command. The pwdx command reports the full path of the PID process.

$ pwdx 13896
13896: /home/user/python_program

Source: https://stackoverflow.com/a/63447358/6077264

answered Jun 27, 2022 at 23:58

You can also use this command:

cat /proc/PID/comm

It also works without root.

answered Jul 12, 2022 at 17:06

Источник

In this article, we will look at how to find a process name by its process identification number (PID). Before we dive into the actual solution, let us briefly talk about how processes are created and identified by Linux.

Every time a user or the system (Linux) launches a program, the kernel will create a process. A process holds execution details of the program in memory such as its input and output data, variables and so on.

Importantly, since Linux is a multitasking operating system, it executes several programs simultaneously, and this means each process process must be identified specifically.

The kernel identifies each process using a process ID (PID), a every instance of process must have a unique PID from other processes which is assigned when the process is invoked, to avoid any execution errors.

The /proc file system stores information about currently running processes on your system, it contains directories for each process.

Use the ls command to list its contents, however, the list may be long, so employ a pipeline and the less utility to view the /proc contents in a more convenient way as below:

$ ls /proc 
OR
$ ls /proc | less

List /proc File System

1     168   2230  25    329   584   7386  83         driver        schedstat
10    169   2234  2503  33    603   74    830        execdomains   scsi
1070  17    2247  2507  34    610   7411  833        fb            self
1081  1702  2256  2523  349   611   7423  836        filesystems   slabinfo
109   1714  2258  253   35    612   745   839        fs            softirqs
11    173   2266  2551  36    613   746   84         interrupts    stat
110   1760  2273  26    362   62    75    844        iomem         swaps
1188  1763  2278  2688  3642  63    7533  85         ioports       sys
12    1769  2282  2694  3643  64    7589  86         irq           sysrq-trigger
1204  177   2283  2695  37    6436  76    860        kallsyms      sysvipc
1209  1773  2285  2698  38    65    7619  87         kcore         thread-self
1254  18    2287  2699  39    66    7689  9          keys          timer_list
13    1847  2295  27    3974  67    7690  94         key-users     timer_stats
15    1914  23    2702  3976  68    77    977        kmsg          tty
152   1917  2308  28    4273  6897  7725  981        kpagecgroup   uptime
153   1918  2309  280   4374  69    7729  987        kpagecount    version
154   1938  2310  2815  4392  6969  7733  997        kpageflags    version_signature
155   1956  2311  2817  44    6980  78    acpi       loadavg       vmallocinfo
156   1981  2315  282   45    7     79    asound     locks         vmstat
1565  1986  2316  283   4543  70    790   buddyinfo  mdstat        zoneinfo
1567  1988  2317  29    46    71    8     bus        meminfo
157   2     2324  2935  461   7102  80    cgroups    misc
1579  20    2347  2944  4686  72    808   cmdline    modules
158   2010  2354  3     47    73    81    consoles   mounts
1584  2043  2436  30    4700  7304  810   cpuinfo    mtrr
159   2044  2437  3016  5     7311  815   crypto     net
1590  21    2442  31    515   7322  82    devices    pagetypeinfo
16    2167  2443  318   5273  7347  820   diskstats  partitions
160   22    2492  32    5274  7367  823   dma        sched_debug

From the screenshot above, the numbered directories store information files about the processes in execution, where each number corresponds to a PID.

Below is the list of files for systemd process with PID 1:

$ ls /proc/1

Show SystemD Process PID

ls: cannot read symbolic link '/proc/1/cwd': Permission denied
ls: cannot read symbolic link '/proc/1/root': Permission denied
ls: cannot read symbolic link '/proc/1/exe': Permission denied
attr        coredump_filter  gid_map    mountinfo   oom_score      schedstat  status
autogroup   cpuset           io         mounts      oom_score_adj  sessionid  syscall
auxv        cwd              limits     mountstats  pagemap        setgroups  task
cgroup      environ          loginuid   net         personality    smaps      timers
clear_refs  exe              map_files  ns          projid_map     stack      uid_map
cmdline     fd               maps       numa_maps   root           stat       wchan
comm        fdinfo           mem        oom_adj     sched          statm

You can monitor processes and their PIDs using traditional Linux commands such as ps, top and relatively new glances command plus many more as in the examples below:

$ ps aux

Show Running Processes with PID

USER       PID %CPU %MEM    VSZ   RSS TTY      STAT START   TIME COMMAND
root         1  0.0  0.0 185728  6268 ?        Ss   10:15   0:01 /sbin/init splash
root         2  0.0  0.0      0     0 ?        S    10:15   0:00 [kthreadd]
root         3  0.0  0.0      0     0 ?        S    10:15   0:00 [ksoftirqd/0]
root         5  0.0  0.0      0     0 ?        S<   10:15   0:00 [kworker/0:0H]
root         7  0.0  0.0      0     0 ?        S    10:15   0:09 [rcu_sched]
root         8  0.0  0.0      0     0 ?        S    10:15   0:00 [rcu_bh]
root         9  0.0  0.0      0     0 ?        S    10:15   0:00 [migration/0]
root        10  0.0  0.0      0     0 ?        S    10:15   0:00 [watchdog/0]
root        11  0.0  0.0      0     0 ?        S    10:15   0:00 [watchdog/1]
root        12  0.0  0.0      0     0 ?        S    10:15   0:00 [migration/1]
root        13  0.0  0.0      0     0 ?        S    10:15   0:00 [ksoftirqd/1]
root        15  0.0  0.0      0     0 ?        S<   10:15   0:00 [kworker/1:0H]
root        16  0.0  0.0      0     0 ?        S    10:15   0:00 [watchdog/2]
root        17  0.0  0.0      0     0 ?        S    10:15   0:00 [migration/2]
root        18  0.0  0.0      0     0 ?        S    10:15   0:00 [ksoftirqd/2]
root        20  0.0  0.0      0     0 ?        S<   10:15   0:00 [kworker/2:0H]
root        21  0.0  0.0      0     0 ?        S    10:15   0:00 [watchdog/3]
root        22  0.0  0.0      0     0 ?        S    10:15   0:00 [migration/3]
root        23  0.0  0.0      0     0 ?        S    10:15   0:00 [ksoftirqd/3]
root        25  0.0  0.0      0     0 ?        S<   10:15   0:00 [kworker/3:0H]
root        26  0.0  0.0      0     0 ?        S    10:15   0:00 [kdevtmpfs]
root        27  0.0  0.0      0     0 ?        S<   10:15   0:00 [netns]
root        28  0.0  0.0      0     0 ?        S<   10:15   0:00 [perf]
....

Monitor Linux processes using traditional top command.

$ top

Monitor Linux Processes with top Command

Monitor Linux processes using glances, a new real-time process monitoring tool for Linux.

$ glances

Glances – Real Time Linux Processes Monitoring

Learn more about how to install Glances in Linux systems.

Find Out Process PID Number

To find out the PID of a process, you can use pidof, a simple command to print out the PID of a process:

$ pidof firefox
$ pidof python
$ pidof cinnamon

Find Linux Process PID

Coming back to our point of focus, assuming you already know the PID of a process, you can print its name using the command form below:

$ ps -p PID -o format

Where:

-p specifies the PID
-o format enables a user-defined format

Find Out Process Name Using PID Number

In this section, we will see how to find out a process name using its PID number with the help of user defined format i.e comm= which means command name, same as the process name.

$ ps -p 2523 -o comm=
$ ps -p 2295 -o comm=

Find Linux Process Name

For additional usage information and options, look through the ps man page.

$ man ps

If you want to kill a process using its PID number, I suggest you to read Find and Kill Linux Processes Using its PID.

Thats it for the moment, if you know any other better way to find out a process name using PID, do share with us via our comment section below.

Источник

The process identifier (a.k.a. process ID or PID) is a number used to uniquely identify an active process.

In this short note i will show how to display information about the Windows process (incl. the process name and path to an executable file) by PID from the command-line prompt (CMD) or a Windows PowerShell.

Cool Tip: List processes in Windows from the CMD! Read more →

Execute the tasklist command to get the process name from PID:

C:> tasklist /FI "pid eq <pid>"

– or –

C:> tasklist /FI "pid eq <pid>" /V /FO List

Option	Description
`/FI`	Displays a set of tasks that match a given criteria specified by the filter
`/V`	Displays verbose task information
`/FO`	Specifies the output format

More information about the process by its PID (including the full path to an executable file) can be retrieved using the wmic command:

C:> wmic process where "ProcessID=<pid>" get /format:list

Cool Tip: Kill a hanging process in Windows from the CMD! Read more →

Was it useful? Share this post with the world!

Источник

I want to get the process name, given it’s pid in python.
Is there any direct method in python?

AndrewL64

15.7k8 gold badges46 silver badges79 bronze badges

asked Aug 30, 2015 at 10:09

The psutil package makes this very easy.

import psutil

process = psutil.Process(pid)

process_name = process.name()

answered Aug 30, 2015 at 10:25

CyphaseCyphase

11.4k2 gold badges30 silver badges32 bronze badges

If you want to see the running process, you can just use os module to execute the ps unix command

import os
os.system("ps")

This will list the processes.

But if you want to get process name by ID, you can try ps -o cmd= <pid>
So the python code will be

import os
def get_pname(id):
    return os.system("ps -o cmd= {}".format(id))
print(get_pname(1))

The better method is using subprocess and pipes.

import subprocess
def get_pname(id):
    p = subprocess.Popen(["ps -o cmd= {}".format(id)], stdout=subprocess.PIPE, shell=True)
    return str(p.communicate()[0])
name = get_pname(1)
print(name)

answered Aug 30, 2015 at 10:31

nishparadoxnishparadox

7506 silver badges13 bronze badges

Command name (only the executable name):

from subprocess import PIPE, Popen

def get_cmd(pid)
    with Popen(f"ps -q {pid} -o comm=", shell=True, stdout=PIPE) as p:
        return p.communicate()[0]

Command with all its arguments as a string:

from subprocess import PIPE, Popen

def get_args(pid)
    with Popen(f"ps -q {pid} -o cmd=", shell=True, stdout=PIPE) as p:
        return p.communicate()[0]

answered Nov 4, 2021 at 11:15

Источник