ps: add thcount,ppid,signal output flags and examples

1 files changed, 24 insertions, 0 deletions

diff --git a/src/monitor/ps.md b/src/monitor/ps.md
index 7e86678..a935c5c 100644
--- a/src/monitor/ps.md
+++ b/src/monitor/ps.md
@@ -6,13 +6,16 @@ ps [opt]
     --no-header .... do not print column header
     -o <OUT> ....... comma separated list of output columns
     -p <PID> ....... only show pid
+    -C <name> ...... only show processes matching name
     -T ............. list threads
+    --signames ..... use short signames instead bitmasks
 ```
 > Set `PS_FORMAT` env variable to setup default output columns.
 
 Frequently used output columns
 ```
 pid        process id
+ppid       parent process id
 pgid       process group id
 tid        thread id
 
@@ -21,11 +24,18 @@ cmd        name of process + args (full)
 
 etime      elapsed time (since process started)
 user       user owning process
+thcount    thread count of process
+nice       nice value (-20 highest priority to 19 lowest)
 
 pcpu       cpu utilization (percent)
 pmem       physical resident set (rss) (percent)
 rss        physical memory (in kb)
 vsz        virtual memory (in kb)
+
+sig        mask of pending signals
+sigcatch   mask of caught signals
+sigignore  mask of ignored signals
+sigmask    mask of blocked signals
 ```
 
 ## Example: Use output for scripting
@@ -34,3 +44,17 @@ for tid in $(ps -o tid --no-header -T -p 31084); do
     taskset -c -p $tid;
 done
 ```
+
+## Example: Watch processes by name
+```sh
+watch -n1 ps -o pid,pcpu,pmem,rss,vsz,state,user,comm -C fish
+```
+
+## Example: Show signal information
+```sh
+# With signal masks.
+ps -o pid,user,sig,sigcatch,sigignore,sigmask,comm -p 66570
+
+# With signal names.
+ps --signames -o pid,user,sig,sigcatch,sigignore,sigmask,comm -p 66570
+```