11693 Document mdb(1) ::ps flags
Reviewed by: John Levon <john.levon@joyent.com>

@@ -355,10 +355,51 @@
                 (void) mdb_pwalk("thread", ps_threadprint, &prt_flags, addr);
 
         return (DCMD_OK);
 }
 
+static void
+ps_help(void)
+{
+        mdb_printf("Display processes.\n\n"
+            "Options:\n"
+            "    -f\tDisplay command arguments\n"
+            "    -l\tDisplay LWPs\n"
+            "    -T\tDisplay tasks\n"
+            "    -P\tDisplay projects\n"
+            "    -z\tDisplay zones\n"
+            "    -t\tDisplay threads\n\n");
+
+        mdb_printf("The resulting output is a table of the processes on the "
+            "system.  The\n"
+            "columns in the output consist of a combination of the "
+            "following fields:\n\n");
+        mdb_printf("S\tProcess state.  Possible states are:\n"
+            "\tS\tSleeping (SSLEEP)\n"
+            "\tR\tRunnable (SRUN)\n"
+            "\tZ\tZombie (SZOMB)\n"
+            "\tI\tIdle (SIDL)\n"
+            "\tO\tOn Cpu (SONPROC)\n"
+            "\tT\tStopped (SSTOP)\n"
+            "\tW\tWaiting (SWAIT)\n");
+
+        mdb_printf("PID\tProcess id.\n");
+        mdb_printf("PPID\tParent process id.\n");
+        mdb_printf("PGID\tProcess group id.\n");
+        mdb_printf("SID\tProcess id of the session leader.\n");
+        mdb_printf("TASK\tThe task id of the process.\n");
+        mdb_printf("PROJ\tThe project id of the process.\n");
+        mdb_printf("ZONE\tThe zone id of the process.\n");
+        mdb_printf("UID\tThe user id of the process.\n");
+        mdb_printf("FLAGS\tThe process flags (see ::pflags).\n");
+        mdb_printf("ADDR\tThe kernel address of the proc_t structure of the "
+            "process\n");
+        mdb_printf("NAME\tThe name (p_user.u_comm field) of the process.  If "
+            "the -f flag\n"
+            "\tis specified, the arguments of the process are displayed.\n");
+}
+
 #define PG_NEWEST       0x0001
 #define PG_OLDEST       0x0002
 #define PG_PIPE_OUT     0x0004
 #define PG_EXACT_MATCH  0x0008
 

@@ -4063,11 +4104,12 @@
         { "lminfo", NULL, "print lock manager information", lminfo },
         { "ndi_event_hdl", "?", "print ndi_event_hdl", ndi_event_hdl },
         { "panicinfo", NULL, "print panic information", panicinfo },
         { "pid2proc", "?", "convert PID to proc_t address", pid2proc },
         { "project", NULL, "display kernel project(s)", project },
-        { "ps", "[-fltzTP]", "list processes (and associated thr,lwp)", ps },
+        { "ps", "[-fltzTP]", "list processes (and associated thr,lwp)", ps,
+            ps_help },
         { "pflags", NULL, "display various proc_t flags", pflags },
         { "pgrep", "[-x] [-n | -o] pattern",
                 "pattern match against all processes", pgrep },
         { "ptree", NULL, "print process tree", ptree },
         { "sysevent", "?[-sv]", "print sysevent pending or sent queue",