{"id":18541,"date":"2009-11-22T15:50:25","date_gmt":"2009-11-22T10:20:25","guid":{"rendered":"http:\/\/froisa.com\/?p=39"},"modified":"2009-11-22T15:50:25","modified_gmt":"2009-11-22T10:20:25","slug":"pstree","status":"publish","type":"post","link":"https:\/\/www.trueangle.org\/index.php\/2009\/11\/22\/pstree\/","title":{"rendered":"pstree – display a tree of processes"},"content":{"rendered":"

ABOUT pstree<\/u><\/p>\n

\npstree shows running processes as a tree.  The tree is rooted at either pid  or  init  if  pid  is\nomitted.   If a user name is specified, all process trees rooted at processes owned by that user are\nshown.\n<\/pre>\n
[bash]
\n$pstree -A
\ninit-+-NetworkManager—3*[{NetworkManager}]
\n     |-accounts-daemon—2*[{accounts-daemon}]
\n     |-acpid
\n     |-at-spi-bus-laun-+-dbus-daemon
\n     |                 `-3*[{at-spi-bus-laun}]
\n     |-at-spi2-registr—{at-spi2-registr}
\n     |-atd
\n     |-avahi-daemon—avahi-daemon
\n     |-bluetoothd
\n     |-colord—2*[{colord}]
\n     |-console-kit-dae—64*[{console-kit-dae}]
\n     |-cron
\n     |-2*[dbus-daemon]
\n     |-dbus-launch
\n     |-dconf-service—2*[{dconf-service}]
\n     |-dhclient
\n     |-evolution-addre—4*[{evolution-addre}]
\n     |-evolution-calen—4*[{evolution-calen}]
\n     |-evolution-sourc—2*[{evolution-sourc}]
\n     |-exim4
\n     |-gconfd-2
\n     |-gdm3-+-gdm-simple-slav-+-Xorg—{Xorg}
\n     |      |                 |-gdm-session-wor-+-gnome-session-+-applet.py—{applet.py}
\n     |      |                 |                 |               |-evolution-alarm—4*[{evolution-alarm}]
\n     |      |                 |                 |               |-gnome-settings—-3*[{gnome-settings-}]
\n     |      |                 |                 |               |-gnome-shell-+-chrome-+-chrome
\n     |      |                 |                 |               |             |        |-chrome-sandbox—chro+
\n     |      |                 |                 |               |             |        `-39*[{chrome}]
\n     |      |                 |                 |               |             `-6*[{gnome-shell}]
\n     |      |                 |                 |               |-ssh-agent
\n     |      |                 |                 |               |-tracker-store—7*[{tracker-store}]
\n     |      |                 |                 |               `-3*[{gnome-session}]
\n     |      |                 |                 `-2*[{gdm-session-wor}]
\n     |      |                 `-2*[{gdm-simple-slav}]
\n     |      `-2*[{gdm3}]
\n     |-6*[getty]
\n     |-gnome-keyring-d—7*[{gnome-keyring-d}]
\n     |-gnome-shell-cal—4*[{gnome-shell-cal}]
\n     |-gnome-terminal–+-bash—emacs
\n     |                 |-bash—pstree
\n     |                 |-gnome-pty-helpe
\n     |                 `-3*[{gnome-terminal-}]
\n     |-goa-daemon—3*[{goa-daemon}]
\n     |-gpm
\n     |-gsd-printer—{gsd-printer}
\n     |-gvfs-afc-volume—2*[{gvfs-afc-volume}]
\n     |-gvfs-goa-volume—{gvfs-goa-volume}
\n     |-gvfs-gphoto2-vo—{gvfs-gphoto2-vo}
\n     |-gvfs-mtp-volume—{gvfs-mtp-volume}
\n     |-gvfs-udisks2-vo—2*[{gvfs-udisks2-vo}]
\n     |-gvfsd—{gvfsd}
\n     |-gvfsd-burn—2*[{gvfsd-burn}]
\n     |-mission-control—2*[{mission-control}]
\n     |-modem-manager
\n     |-ntpd
\n     |-polkitd—2*[{polkitd}]
\n     |-pulseaudio—2*[{pulseaudio}]
\n     |-rsyslogd—3*[{rsyslogd}]
\n     |-rtkit-daemon—2*[{rtkit-daemon}]
\n     |-sshd
\n     |-systemd-logind
\n     |-udevd
\n     |-udisksd—4*[{udisksd}]
\n     |-upowerd—2*[{upowerd}]
\n     `-wpa_supplicant
\n$
\n[\/bash]<\/p>\n
\nUNIX Explanation\n\npstree  shows running processes  as a  tree. The  tree is rooted at either pid or init if pid is omitted.\nIf a user name is specified, all  process trees rooted at processes owned by that user are shown.\n<\/pre>\n
RELATED SOURCE CODE EXPOSITION<\/u>
\n[c]
\nstatic void free_buffers()
\n{
\n    if (width != NULL) {
\n        free(width);
\n        width = NULL;
\n    }
\n    if (more != NULL) {
\n        free(more);
\n        more = NULL;
\n    }
\n    capacity = 0;
\n}
\n[\/c]<\/p>\n
SOURCE CODE HIGHLIGHT<\/u><\/p>\n
\nFrees any buffers allocated by ensure_buffer_capacity.\n<\/p>\n
RELATED KNOWLEDGE<\/u><\/p>\n
\nThe   fundamental  data   structure  within   the  kernel controlling all processes is the process\nstructure, which grows and shrinks dynamically as processes are forked and finished or killed.\n<\/pre>\n
LINKS
\nhttps:\/\/www.howtoforge.com\/linux-pstree-command\/<\/a>
\nhttp:\/\/man7.org\/linux\/man-pages\/man1\/pstree.1.html<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"
ABOUT pstree pstree shows running processes as a tree. The tree is rooted at either pid or init if pid is omitted. If a user name is specified, all process trees rooted at processes owned by that user are shown. [bash] $pstree -A init-+-NetworkManager—3*[{NetworkManager}] |-accounts-daemon—2*[{accounts-daemon}] |-acpid |-at-spi-bus-laun-+-dbus-daemon | `-3*[{at-spi-bus-laun}] |-at-spi2-registr—{at-spi2-registr} |-atd |-avahi-daemon—avahi-daemon |-bluetoothd |-colord—2*[{colord}] |-console-kit-dae—64*[{console-kit-dae}] … <\/p>\n
Continue reading “pstree – display a tree of processes”<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":18246,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[83],"tags":[639,1301,1322],"_links":{"self":[{"href":"https:\/\/www.trueangle.org\/index.php\/wp-json\/wp\/v2\/posts\/18541"}],"collection":[{"href":"https:\/\/www.trueangle.org\/index.php\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.trueangle.org\/index.php\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.trueangle.org\/index.php\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.trueangle.org\/index.php\/wp-json\/wp\/v2\/comments?post=18541"}],"version-history":[{"count":0,"href":"https:\/\/www.trueangle.org\/index.php\/wp-json\/wp\/v2\/posts\/18541\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.trueangle.org\/index.php\/wp-json\/"}],"wp:attachment":[{"href":"https:\/\/www.trueangle.org\/index.php\/wp-json\/wp\/v2\/media?parent=18541"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.trueangle.org\/index.php\/wp-json\/wp\/v2\/categories?post=18541"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.trueangle.org\/index.php\/wp-json\/wp\/v2\/tags?post=18541"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}