what causes htop processes with no name? The 2019 Stack Overflow Developer Survey Results Are In Announcing the arrival of Valued Associate #679: Cesar Manara Planned maintenance scheduled April 17/18, 2019 at 00:00UTC (8:00pm US/Eastern) 2019 Community Moderator Election ResultsKilling a tree of processes in top/htophtop: show processes of all users except rootMaking htop summaries respect --pidhtop: Using Ctrl + n & Ctrl + p to move between processesWhat does the (!) mean after uptime on htopHow to display only a process and its descendant processes on htop?htop summary only displayhtop interpetation of multiple entries per processWhat is pool in htop?htop / top with specifying process name filter on the command line - at program startup?
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what causes htop processes with no name?
The 2019 Stack Overflow Developer Survey Results Are In
Announcing the arrival of Valued Associate #679: Cesar Manara
Planned maintenance scheduled April 17/18, 2019 at 00:00UTC (8:00pm US/Eastern)
2019 Community Moderator Election ResultsKilling a tree of processes in top/htophtop: show processes of all users except rootMaking htop summaries respect --pidhtop: Using Ctrl + n & Ctrl + p to move between processesWhat does the (!) mean after uptime on htopHow to display only a process and its descendant processes on htop?htop summary only displayhtop interpetation of multiple entries per processWhat is pool in htop?htop / top with specifying process name filter on the command line - at program startup?
.everyoneloves__top-leaderboard:empty,.everyoneloves__mid-leaderboard:empty,.everyoneloves__bot-mid-leaderboard:empty margin-bottom:0;
what causes processes with no name in htop? 
this is a fully up to date debian 8.6 system, running htop 1.0.3 as root, amd64. and unix.stackexchange.com seems to shrink the image to an unreadable size, i recommend opening the image url http://image.prntscr.com/image/5ef407a1f99a4c9692db179a3afb2516.png directly
process htop
edited Apr 10 at 8:30
Glorfindel
3431511
asked Sep 23 '16 at 10:38
hanshenrikhanshenrik
10810
add a comment |
what causes processes with no name in htop?
this is a fully up to date debian 8.6 system, running htop 1.0.3 as root, amd64. and unix.stackexchange.com seems to shrink the image to an unreadable size, i recommend opening the image url http://image.prntscr.com/image/5ef407a1f99a4c9692db179a3afb2516.png directly
process htop
edited Apr 10 at 8:30
Glorfindel
3431511
asked Sep 23 '16 at 10:38
hanshenrikhanshenrik
10810
I would cross check it with a ps ax. It maybe just be a curses bug.
– Rui F Ribeiro
Sep 23 '16 at 13:20
add a comment |
what causes processes with no name in htop?
this is a fully up to date debian 8.6 system, running htop 1.0.3 as root, amd64. and unix.stackexchange.com seems to shrink the image to an unreadable size, i recommend opening the image url http://image.prntscr.com/image/5ef407a1f99a4c9692db179a3afb2516.png directly
process htop
edited Apr 10 at 8:30
Glorfindel
3431511
asked Sep 23 '16 at 10:38
hanshenrikhanshenrik
10810
what causes processes with no name in htop?
this is a fully up to date debian 8.6 system, running htop 1.0.3 as root, amd64. and unix.stackexchange.com seems to shrink the image to an unreadable size, i recommend opening the image url http://image.prntscr.com/image/5ef407a1f99a4c9692db179a3afb2516.png directly
process htop
process htop
edited Apr 10 at 8:30
Glorfindel
3431511
asked Sep 23 '16 at 10:38
hanshenrikhanshenrik
10810
edited Apr 10 at 8:30
Glorfindel
3431511
asked Sep 23 '16 at 10:38
hanshenrikhanshenrik
10810
edited Apr 10 at 8:30
Glorfindel
3431511
edited Apr 10 at 8:30
Glorfindel
3431511
edited Apr 10 at 8:30
Glorfindel
3431511
3431511
asked Sep 23 '16 at 10:38
hanshenrikhanshenrik
10810
asked Sep 23 '16 at 10:38
hanshenrikhanshenrik
10810
asked Sep 23 '16 at 10:38
hanshenrikhanshenrik
10810
10810
I would cross check it with a ps ax. It maybe just be a curses bug.
– Rui F Ribeiro
Sep 23 '16 at 13:20
add a comment |
I would cross check it with a ps ax. It maybe just be a curses bug.
– Rui F Ribeiro
Sep 23 '16 at 13:20
I would cross check it with a ps ax. It maybe just be a curses bug.
– Rui F Ribeiro
Sep 23 '16 at 13:20
I would cross check it with a ps ax. It maybe just be a curses bug.
– Rui F Ribeiro
Sep 23 '16 at 13:20
add a comment |
1 Answer
1
active
oldest
votes
htop displays the process's command line with spaces between the arguments. (The first argument, argument number 0, is conventionally the command name passed by the parent process.)
A process may overwrite its command line arguments with a string of the same length or shorter. A few programs use this to convey information about the state of the program. Screen sets the first argument (command name) to uppercase in the background process that manages the sessions and leaves the usually lowercase command name in the front-end process that runs in a terminal that's attached to the session..
It's also possible to start a process with no command line arguments. It's very unusual: conventionally the first argument is the command name. But it's technically possible.
While this could be a display bug, or the effect of a command name containing carriage returns, the most likely explanation is that this process (currently) has no arguments. You can check by asking the kernel directly:
cat -A /proc/12727/cmdline; echo
This displays the arguments with control characters replaced by a visual representation. The arguments are separated by ^@.
You can find other information by exploring /proc/12727, for example /proc/12727/exe is a symbolic link to the executable that's running in this process and /proc/12727/fd shows what files the process has open. You can also display this information with lsof -p12727.
ps l 12727 will show other information about this process, in particular its parent process ID (PPID). (You can also configure htop to show this information by activating the corresponding column in the settings.)
answered Sep 24 '16 at 23:52
GillesGilles
547k13011131630
here is a little C script to reproduce it: #include <string.h> int main(int, char * argv[]) memset(argv[0], '', strlen(argv[0])); while (1) // make it easy to find this process with "sort by cpu usage" return 0;
– hanshenrik
Apr 10 at 10:45
add a comment |
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htop displays the process's command line with spaces between the arguments. (The first argument, argument number 0, is conventionally the command name passed by the parent process.)
A process may overwrite its command line arguments with a string of the same length or shorter. A few programs use this to convey information about the state of the program. Screen sets the first argument (command name) to uppercase in the background process that manages the sessions and leaves the usually lowercase command name in the front-end process that runs in a terminal that's attached to the session..
It's also possible to start a process with no command line arguments. It's very unusual: conventionally the first argument is the command name. But it's technically possible.
While this could be a display bug, or the effect of a command name containing carriage returns, the most likely explanation is that this process (currently) has no arguments. You can check by asking the kernel directly:
cat -A /proc/12727/cmdline; echo
This displays the arguments with control characters replaced by a visual representation. The arguments are separated by ^@.
You can find other information by exploring /proc/12727, for example /proc/12727/exe is a symbolic link to the executable that's running in this process and /proc/12727/fd shows what files the process has open. You can also display this information with lsof -p12727.
ps l 12727 will show other information about this process, in particular its parent process ID (PPID). (You can also configure htop to show this information by activating the corresponding column in the settings.)
answered Sep 24 '16 at 23:52
GillesGilles
547k13011131630
here is a little C script to reproduce it: #include <string.h> int main(int, char * argv[]) memset(argv[0], '', strlen(argv[0])); while (1) // make it easy to find this process with "sort by cpu usage" return 0;
– hanshenrik
Apr 10 at 10:45
add a comment |
htop displays the process's command line with spaces between the arguments. (The first argument, argument number 0, is conventionally the command name passed by the parent process.)
A process may overwrite its command line arguments with a string of the same length or shorter. A few programs use this to convey information about the state of the program. Screen sets the first argument (command name) to uppercase in the background process that manages the sessions and leaves the usually lowercase command name in the front-end process that runs in a terminal that's attached to the session..
It's also possible to start a process with no command line arguments. It's very unusual: conventionally the first argument is the command name. But it's technically possible.
While this could be a display bug, or the effect of a command name containing carriage returns, the most likely explanation is that this process (currently) has no arguments. You can check by asking the kernel directly:
cat -A /proc/12727/cmdline; echo
This displays the arguments with control characters replaced by a visual representation. The arguments are separated by ^@.
You can find other information by exploring /proc/12727, for example /proc/12727/exe is a symbolic link to the executable that's running in this process and /proc/12727/fd shows what files the process has open. You can also display this information with lsof -p12727.
ps l 12727 will show other information about this process, in particular its parent process ID (PPID). (You can also configure htop to show this information by activating the corresponding column in the settings.)
answered Sep 24 '16 at 23:52
GillesGilles
547k13011131630
here is a little C script to reproduce it: #include <string.h> int main(int, char * argv[]) memset(argv[0], '', strlen(argv[0])); while (1) // make it easy to find this process with "sort by cpu usage" return 0;
– hanshenrik
Apr 10 at 10:45
add a comment |
htop displays the process's command line with spaces between the arguments. (The first argument, argument number 0, is conventionally the command name passed by the parent process.)
A process may overwrite its command line arguments with a string of the same length or shorter. A few programs use this to convey information about the state of the program. Screen sets the first argument (command name) to uppercase in the background process that manages the sessions and leaves the usually lowercase command name in the front-end process that runs in a terminal that's attached to the session..
It's also possible to start a process with no command line arguments. It's very unusual: conventionally the first argument is the command name. But it's technically possible.
While this could be a display bug, or the effect of a command name containing carriage returns, the most likely explanation is that this process (currently) has no arguments. You can check by asking the kernel directly:
cat -A /proc/12727/cmdline; echo
This displays the arguments with control characters replaced by a visual representation. The arguments are separated by ^@.
You can find other information by exploring /proc/12727, for example /proc/12727/exe is a symbolic link to the executable that's running in this process and /proc/12727/fd shows what files the process has open. You can also display this information with lsof -p12727.
ps l 12727 will show other information about this process, in particular its parent process ID (PPID). (You can also configure htop to show this information by activating the corresponding column in the settings.)
answered Sep 24 '16 at 23:52
GillesGilles
547k13011131630
htop displays the process's command line with spaces between the arguments. (The first argument, argument number 0, is conventionally the command name passed by the parent process.)
A process may overwrite its command line arguments with a string of the same length or shorter. A few programs use this to convey information about the state of the program. Screen sets the first argument (command name) to uppercase in the background process that manages the sessions and leaves the usually lowercase command name in the front-end process that runs in a terminal that's attached to the session..
It's also possible to start a process with no command line arguments. It's very unusual: conventionally the first argument is the command name. But it's technically possible.
While this could be a display bug, or the effect of a command name containing carriage returns, the most likely explanation is that this process (currently) has no arguments. You can check by asking the kernel directly:
cat -A /proc/12727/cmdline; echo
This displays the arguments with control characters replaced by a visual representation. The arguments are separated by ^@.
You can find other information by exploring /proc/12727, for example /proc/12727/exe is a symbolic link to the executable that's running in this process and /proc/12727/fd shows what files the process has open. You can also display this information with lsof -p12727.
ps l 12727 will show other information about this process, in particular its parent process ID (PPID). (You can also configure htop to show this information by activating the corresponding column in the settings.)
answered Sep 24 '16 at 23:52
GillesGilles
547k13011131630
answered Sep 24 '16 at 23:52
GillesGilles
547k13011131630
answered Sep 24 '16 at 23:52
GillesGilles
547k13011131630
answered Sep 24 '16 at 23:52
GillesGilles
547k13011131630
547k13011131630
here is a little C script to reproduce it: #include <string.h> int main(int, char * argv[]) memset(argv[0], '', strlen(argv[0])); while (1) // make it easy to find this process with "sort by cpu usage" return 0;
– hanshenrik
Apr 10 at 10:45
add a comment |
here is a little C script to reproduce it: #include <string.h> int main(int, char * argv[]) memset(argv[0], '', strlen(argv[0])); while (1) // make it easy to find this process with "sort by cpu usage" return 0;
– hanshenrik
Apr 10 at 10:45
here is a little C script to reproduce it: #include <string.h> int main(int, char * argv[]) memset(argv[0], '', strlen(argv[0])); while (1) // make it easy to find this process with "sort by cpu usage" return 0;
– hanshenrik
Apr 10 at 10:45
here is a little C script to reproduce it: #include <string.h> int main(int, char * argv[]) memset(argv[0], '', strlen(argv[0])); while (1) // make it easy to find this process with "sort by cpu usage" return 0;
– hanshenrik
Apr 10 at 10:45
add a comment |
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I would cross check it with a ps ax. It maybe just be a curses bug.
– Rui F Ribeiro
Sep 23 '16 at 13:20