ps: Match on truncated 16 char for -C
The referenced commit the comm length was increased from 16 to 64 characters to handle the larger command names for things like kernel threads. However most user processes are limited to 15 characters which means if you try something like ps -C myprogramisbiggerthansixteen this would fail to match because /proc/<PID>/comm would only be myprogramisbigg ps now checks the comm length and if it is 15 and if the given match is 15 or more, it will only match the first 15 characters. This is also how killall has worked for about a year. Thanks to Jean Delvare <jdelvare@suse.de> for the note. Copy of commit from master. References: commit14005a371e
commit psmisc/psmisc@1188315cd0 commit3e1c00d051
Signed-off-by: Craig Small <csmall@dropbear.xyz>
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NEWS
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NEWS
@ -7,6 +7,7 @@ procps-ng NEXT
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* pgrep: Add older than selection merge #79
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* pidof: show worker threads Redhat #1803640
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* ps.1: Mention stime alias issue #164
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* ps: check also match on truncated 16 char comm names
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* sysctl: Match systemd directory order
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* sysctl: Document directory order Debian #951550
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* top: ensure config file backward compatibility Debian #951335
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ps/select.c
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ps/select.c
@ -113,8 +113,16 @@ static int proc_was_listed(proc_t *buf){
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break; case SEL_TTY : return_if_match(rSv(TTY, s_int, buf),tty);
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break; case SEL_SESS: return_if_match(rSv(ID_SESSION, s_int, buf),pid);
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break; case SEL_COMM: i=sn->n; while(i--)
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if(!strncmp( rSv(CMD, str, buf), (*(sn->u+i)).cmd, 63 )) return 1;
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break;
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case SEL_COMM:
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i=sn->n;
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while(i--) {
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/* special case, comm is 16 characters but match is longer */
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if (strlen(rSv(CMD, str, buf)) == 15 && strlen((*(sn->u+i)).cmd) >= 15)
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if(!strncmp( rSv(CMD, str, buf), (*(sn->u+i)).cmd, 15 )) return 1;
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if(!strncmp( rSv(CMD, str, buf), (*(sn->u+i)).cmd, 63 )) return 1;
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}
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#undef return_if_match
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