Convert to use libxo. Document use of libxo as well.

Obtained from:  Phil Shafer <phil@juniper.net>
Sponsored by:   Juniper Networks, Inc.

6 files changed, 253 insertions, 166 deletions

diff --git a/bin/ps/Makefile b/bin/ps/Makefile
index 30dbdc9..79e9fc6 100644
--- a/bin/ps/Makefile
+++ b/bin/ps/Makefile
@@ -11,6 +11,6 @@ SRCS=	fmt.c keyword.c nlist.c print.c ps.c
 # on large systems.
 #
 CFLAGS+=-DLAZY_PS
-LIBADD=	m kvm jail
+LIBADD=	m kvm jail xo
 
 .include <bsd.prog.mk>
diff --git a/bin/ps/keyword.c b/bin/ps/keyword.c
index 38a9934..b802c37 100644
--- a/bin/ps/keyword.c
+++ b/bin/ps/keyword.c
@@ -47,6 +47,7 @@ __FBSDID("$FreeBSD$");
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
+#include <libxo/xo.h>
 
 #include "ps.h"
 
@@ -64,116 +65,170 @@ static int  vcmp(const void *, const void *);
 
 /* PLEASE KEEP THE TABLE BELOW SORTED ALPHABETICALLY!!! */
 static VAR var[] = {
-	{"%cpu", "%CPU", NULL, 0, pcpu, 0, CHAR, NULL, 0},
-	{"%mem", "%MEM", NULL, 0, pmem, 0, CHAR, NULL, 0},
-	{"acflag", "ACFLG", NULL, 0, kvar, KOFF(ki_acflag), USHORT, "x", 0},
-	{"acflg", "", "acflag", 0, NULL, 0, CHAR, NULL, 0},
-	{"args", "COMMAND", NULL, COMM|LJUST|USER, arguments, 0,
-		CHAR, NULL, 0},
-	{"blocked", "", "sigmask", 0, NULL, 0, CHAR, NULL, 0},
-	{"caught", "", "sigcatch", 0, NULL, 0, CHAR, NULL, 0},
-	{"class", "CLASS", NULL, LJUST, loginclass, 0, CHAR, NULL, 0},
-	{"comm", "COMMAND", NULL, LJUST, ucomm, 0, CHAR, NULL, 0},
-	{"command", "COMMAND", NULL, COMM|LJUST|USER, command, 0,
-		CHAR, NULL, 0},
-	{"cow", "COW", NULL, 0, kvar, KOFF(ki_cow), UINT, "u", 0},
-	{"cpu", "CPU", NULL, 0, kvar, KOFF(ki_estcpu), UINT, "d", 0},
-	{"cputime", "", "time", 0, NULL, 0, CHAR, NULL, 0},
-	{"dsiz", "DSIZ", NULL, 0, kvar, KOFF(ki_dsize), PGTOK, "ld", 0},
-	{"egid", "", "gid", 0, NULL, 0, CHAR, NULL, 0},
-	{"egroup", "", "group", 0, NULL, 0, CHAR, NULL, 0},
-	{"emul", "EMUL", NULL, LJUST, emulname, 0, CHAR, NULL, 0},
-	{"etime", "ELAPSED", NULL, USER, elapsed, 0, CHAR, NULL, 0},
-	{"etimes", "ELAPSED", NULL, USER, elapseds, 0, CHAR, NULL, 0},
-	{"euid", "", "uid", 0, NULL, 0, CHAR, NULL, 0},
-	{"f", "F", NULL, 0, kvar, KOFF(ki_flag), INT, "x", 0},
-	{"f2", "F2", NULL, 0, kvar, KOFF(ki_flag2), INT, "08x", 0},
-	{"fib", "FIB", NULL, 0, kvar, KOFF(ki_fibnum), INT, "d", 0},
-	{"flags", "", "f", 0, NULL, 0, CHAR, NULL, 0},
-	{"flags2", "", "f2", 0, NULL, 0, CHAR, NULL, 0},
-	{"gid", "GID", NULL, 0, kvar, KOFF(ki_groups), UINT, UIDFMT, 0},
-	{"group", "GROUP", NULL, LJUST, egroupname, 0, CHAR, NULL, 0},
-	{"ignored", "", "sigignore", 0, NULL, 0, CHAR, NULL, 0},
-	{"inblk", "INBLK", NULL, USER, rvar, ROFF(ru_inblock), LONG, "ld", 0},
-	{"inblock", "", "inblk", 0, NULL, 0, CHAR, NULL, 0},
-	{"jid", "JID", NULL, 0, kvar, KOFF(ki_jid), INT, "d", 0},
-	{"jobc", "JOBC", NULL, 0, kvar, KOFF(ki_jobc), SHORT, "d", 0},
-	{"ktrace", "KTRACE", NULL, 0, kvar, KOFF(ki_traceflag), INT, "x", 0},
-	{"label", "LABEL", NULL, LJUST, label, 0, CHAR, NULL, 0},
-	{"lim", "LIM", NULL, 0, maxrss, 0, CHAR, NULL, 0},
-	{"lockname", "LOCK", NULL, LJUST, lockname, 0, CHAR, NULL, 0},
-	{"login", "LOGIN", NULL, LJUST, logname, 0, CHAR, NULL, 0},
-	{"logname", "", "login", 0, NULL, 0, CHAR, NULL, 0},
-	{"lstart", "STARTED", NULL, LJUST|USER, lstarted, 0, CHAR, NULL, 0},
-	{"lwp", "LWP", NULL, 0, kvar, KOFF(ki_tid), UINT, LWPFMT, 0},
-	{"majflt", "MAJFLT", NULL, USER, rvar, ROFF(ru_majflt), LONG, "ld", 0},
-	{"minflt", "MINFLT", NULL, USER, rvar, ROFF(ru_minflt), LONG, "ld", 0},
-	{"msgrcv", "MSGRCV", NULL, USER, rvar, ROFF(ru_msgrcv), LONG, "ld", 0},
-	{"msgsnd", "MSGSND", NULL, USER, rvar, ROFF(ru_msgsnd), LONG, "ld", 0},
-	{"mwchan", "MWCHAN", NULL, LJUST, mwchan, 0, CHAR, NULL, 0},
-	{"ni", "", "nice", 0, NULL, 0, CHAR, NULL, 0},
-	{"nice", "NI", NULL, 0, kvar, KOFF(ki_nice), CHAR, "d", 0},
-	{"nivcsw", "NIVCSW", NULL, USER, rvar, ROFF(ru_nivcsw), LONG, "ld", 0},
-	{"nlwp", "NLWP", NULL, 0, kvar, KOFF(ki_numthreads), UINT, NLWPFMT, 0},
-	{"nsignals", "", "nsigs", 0, NULL, 0, CHAR, NULL, 0},
-	{"nsigs", "NSIGS", NULL, USER, rvar, ROFF(ru_nsignals), LONG, "ld", 0},
-	{"nswap", "NSWAP", NULL, USER, rvar, ROFF(ru_nswap), LONG, "ld", 0},
-	{"nvcsw", "NVCSW", NULL, USER, rvar, ROFF(ru_nvcsw), LONG, "ld", 0},
-	{"nwchan", "NWCHAN", NULL, LJUST, nwchan, 0, CHAR, NULL, 0},
-	{"oublk", "OUBLK", NULL, USER, rvar, ROFF(ru_oublock), LONG, "ld", 0},
-	{"oublock", "", "oublk", 0, NULL, 0, CHAR, NULL, 0},
-	{"paddr", "PADDR", NULL, 0, kvar, KOFF(ki_paddr), KPTR, "lx", 0},
-	{"pagein", "PAGEIN", NULL, USER, pagein, 0, CHAR, NULL, 0},
-	{"pcpu", "", "%cpu", 0, NULL, 0, CHAR, NULL, 0},
-	{"pending", "", "sig", 0, NULL, 0, CHAR, NULL, 0},
-	{"pgid", "PGID", NULL, 0, kvar, KOFF(ki_pgid), UINT, PIDFMT, 0},
-	{"pid", "PID", NULL, 0, kvar, KOFF(ki_pid), UINT, PIDFMT, 0},
-	{"pmem", "", "%mem", 0, NULL, 0, CHAR, NULL, 0},
-	{"ppid", "PPID", NULL, 0, kvar, KOFF(ki_ppid), UINT, PIDFMT, 0},
-	{"pri", "PRI", NULL, 0, pri, 0, CHAR, NULL, 0},
-	{"re", "RE", NULL, INF127, kvar, KOFF(ki_swtime), UINT, "d", 0},
-	{"rgid", "RGID", NULL, 0, kvar, KOFF(ki_rgid), UINT, UIDFMT, 0},
-	{"rgroup", "RGROUP", NULL, LJUST, rgroupname, 0, CHAR, NULL, 0},
-	{"rss", "RSS", NULL, 0, kvar, KOFF(ki_rssize), PGTOK, "ld", 0},
-	{"rtprio", "RTPRIO", NULL, 0, priorityr, KOFF(ki_pri), CHAR, NULL, 0},
-	{"ruid", "RUID", NULL, 0, kvar, KOFF(ki_ruid), UINT, UIDFMT, 0},
-	{"ruser", "RUSER", NULL, LJUST, runame, 0, CHAR, NULL, 0},
-	{"sid", "SID", NULL, 0, kvar, KOFF(ki_sid), UINT, PIDFMT, 0},
-	{"sig", "PENDING", NULL, 0, kvar, KOFF(ki_siglist), INT, "x", 0},
-	{"sigcatch", "CAUGHT", NULL, 0, kvar, KOFF(ki_sigcatch), UINT, "x", 0},
-	{"sigignore", "IGNORED", NULL, 0, kvar, KOFF(ki_sigignore),
-		UINT, "x", 0},
-	{"sigmask", "BLOCKED", NULL, 0, kvar, KOFF(ki_sigmask), UINT, "x", 0},
-	{"sl", "SL", NULL, INF127, kvar, KOFF(ki_slptime), UINT, "d", 0},
-	{"ssiz", "SSIZ", NULL, 0, kvar, KOFF(ki_ssize), PGTOK, "ld", 0},
-	{"start", "STARTED", NULL, LJUST|USER, started, 0, CHAR, NULL, 0},
-	{"stat", "", "state", 0, NULL, 0, CHAR, NULL, 0},
-	{"state", "STAT", NULL, LJUST, state, 0, CHAR, NULL, 0},
-	{"svgid", "SVGID", NULL, 0, kvar, KOFF(ki_svgid), UINT, UIDFMT, 0},
-	{"svuid", "SVUID", NULL, 0, kvar, KOFF(ki_svuid), UINT, UIDFMT, 0},
-	{"systime", "SYSTIME", NULL, USER, systime, 0, CHAR, NULL, 0},
-	{"tdaddr", "TDADDR", NULL, 0, kvar, KOFF(ki_tdaddr), KPTR, "lx", 0},
-	{"tdev", "TDEV", NULL, 0, tdev, 0, CHAR, NULL, 0},
-	{"tdnam", "TDNAM", NULL, LJUST, tdnam, 0, CHAR, NULL, 0},
-	{"time", "TIME", NULL, USER, cputime, 0, CHAR, NULL, 0},
-	{"tpgid", "TPGID", NULL, 0, kvar, KOFF(ki_tpgid), UINT, PIDFMT, 0},
-	{"tracer", "TRACER", NULL, 0, kvar, KOFF(ki_tracer), UINT, PIDFMT, 0},
-	{"tsid", "TSID", NULL, 0, kvar, KOFF(ki_tsid), UINT, PIDFMT, 0},
-	{"tsiz", "TSIZ", NULL, 0, kvar, KOFF(ki_tsize), PGTOK, "ld", 0},
-	{"tt", "TT ", NULL, 0, tname, 0, CHAR, NULL, 0},
-	{"tty", "TTY", NULL, LJUST, longtname, 0, CHAR, NULL, 0},
-	{"ucomm", "UCOMM", NULL, LJUST, ucomm, 0, CHAR, NULL, 0},
-	{"uid", "UID", NULL, 0, kvar, KOFF(ki_uid), UINT, UIDFMT, 0},
-	{"upr", "UPR", NULL, 0, upr, 0, CHAR, NULL, 0},
-	{"uprocp", "UPROCP", NULL, 0, kvar, KOFF(ki_paddr), KPTR, "lx", 0},
-	{"user", "USER", NULL, LJUST, uname, 0, CHAR, NULL, 0},
-	{"usertime", "USERTIME", NULL, USER, usertime, 0, CHAR, NULL, 0},
-	{"usrpri", "", "upr", 0, NULL, 0, CHAR, NULL, 0},
-	{"vsize", "", "vsz", 0, NULL, 0, CHAR, NULL, 0},
-	{"vsz", "VSZ", NULL, 0, vsize, 0, CHAR, NULL, 0},
-	{"wchan", "WCHAN", NULL, LJUST, wchan, 0, CHAR, NULL, 0},
-	{"xstat", "XSTAT", NULL, 0, kvar, KOFF(ki_xstat), USHORT, "x", 0},
-	{"", NULL, NULL, 0, NULL, 0, CHAR, NULL, 0},
+	{"%cpu", "%CPU", NULL, "percent-cpu", 0, pcpu, 0, CHAR, NULL, 0},
+	{"%mem", "%MEM", NULL, "percent-memory", 0, pmem, 0, CHAR, NULL, 0},
+	{"acflag", "ACFLG", NULL, "accounting-flag", 0, kvar, KOFF(ki_acflag),
+	    USHORT, "x", 0},
+	{"acflg", "", "acflag", NULL, 0, NULL, 0, CHAR, NULL, 0},
+	{"args", "COMMAND", NULL, "arguments", COMM|LJUST|USER, arguments, 0,
+	    CHAR, NULL, 0},
+	{"blocked", "", "sigmask", NULL, 0, NULL, 0, CHAR, NULL, 0},
+	{"caught", "", "sigcatch", NULL, 0, NULL, 0, CHAR, NULL, 0},
+	{"class", "CLASS", NULL, "login-class", LJUST, loginclass, 0, CHAR,
+	    NULL, 0},
+	{"comm", "COMMAND", NULL, "command", LJUST, ucomm, 0, CHAR, NULL, 0},
+	{"command", "COMMAND", NULL, "command", COMM|LJUST|USER, command, 0,
+	    CHAR, NULL, 0},
+	{"cow", "COW", NULL, "copy-on-write-faults", 0, kvar, KOFF(ki_cow),
+	    UINT, "u", 0},
+	{"cpu", "CPU", NULL, "cpu-usage", 0, kvar, KOFF(ki_estcpu), UINT, "d",
+	    0},
+	{"cputime", "", "time", NULL, 0, NULL, 0, CHAR, NULL, 0},
+	{"dsiz", "DSIZ", NULL, "data-size", 0, kvar, KOFF(ki_dsize), PGTOK,
+	    "ld", 0},
+	{"egid", "", "gid", NULL, 0, NULL, 0, CHAR, NULL, 0},
+	{"egroup", "", "group", NULL, 0, NULL, 0, CHAR, NULL, 0},
+	{"emul", "EMUL", NULL, "emulation-envirnment", LJUST, emulname, 0,
+	    CHAR, NULL, 0},
+	{"etime", "ELAPSED", NULL, "elapsed-time", USER, elapsed, 0, CHAR,
+	    NULL, 0},
+	{"etimes", "ELAPSED", NULL, "elapsed-times", USER, elapseds, 0, CHAR,
+	    NULL, 0},
+	{"euid", "", "uid", NULL, 0, NULL, 0, CHAR, NULL, 0},
+	{"f", "F", NULL, "flags", 0, kvar, KOFF(ki_flag), INT, "x", 0},
+	{"f2", "F2", NULL, "flags2", 0, kvar, KOFF(ki_flag2), INT, "08x", 0},
+	{"fib", "FIB", NULL, "fib", 0, kvar, KOFF(ki_fibnum), INT, "d", 0},
+	{"flags", "", "f", NULL, 0, NULL, 0, CHAR, NULL, 0},
+	{"flags2", "", "f2", NULL, 0, NULL, 0, CHAR, NULL, 0},
+	{"gid", "GID", NULL, "gid", 0, kvar, KOFF(ki_groups), UINT, UIDFMT, 0},
+	{"group", "GROUP", NULL, "group", LJUST, egroupname, 0, CHAR, NULL, 0},
+	{"ignored", "", "sigignore", NULL, 0, NULL, 0, CHAR, NULL, 0},
+	{"inblk", "INBLK", NULL, "read-blocks", USER, rvar, ROFF(ru_inblock),
+	    LONG, "ld", 0},
+	{"inblock", "", "inblk", NULL, 0, NULL, 0, CHAR, NULL, 0},
+	{"jid", "JID", NULL, "jail-id", 0, kvar, KOFF(ki_jid), INT, "d", 0},
+	{"jobc", "JOBC", NULL, "job-control-count", 0, kvar, KOFF(ki_jobc),
+	    SHORT, "d", 0},
+	{"ktrace", "KTRACE", NULL, "ktrace", 0, kvar, KOFF(ki_traceflag), INT,
+	    "x", 0},
+	{"label", "LABEL", NULL, "label", LJUST, label, 0, CHAR, NULL, 0},
+	{"lim", "LIM", NULL, "memory-limit", 0, maxrss, 0, CHAR, NULL, 0},
+	{"lockname", "LOCK", NULL, "lock-name", LJUST, lockname, 0, CHAR, NULL,
+	    0},
+	{"login", "LOGIN", NULL, "login-name", LJUST, logname, 0, CHAR, NULL,
+	    0},
+	{"logname", "", "login", NULL, 0, NULL, 0, CHAR, NULL, 0},
+	{"lstart", "STARTED", NULL, "start-time", LJUST|USER, lstarted, 0,
+	    CHAR, NULL, 0},
+	{"lwp", "LWP", NULL, "process-thread-id", 0, kvar, KOFF(ki_tid), UINT,
+	    LWPFMT, 0},
+	{"majflt", "MAJFLT", NULL, "major-faults", USER, rvar, ROFF(ru_majflt),
+	    LONG, "ld", 0},
+	{"minflt", "MINFLT", NULL, "minor-faults", USER, rvar, ROFF(ru_minflt),
+	    LONG, "ld", 0},
+	{"msgrcv", "MSGRCV", NULL, "received-messages", USER, rvar,
+	    ROFF(ru_msgrcv), LONG, "ld", 0},
+	{"msgsnd", "MSGSND", NULL, "sent-messages", USER, rvar,
+	    ROFF(ru_msgsnd), LONG, "ld", 0},
+	{"mwchan", "MWCHAN", NULL, "wait-channel", LJUST, mwchan, 0, CHAR,
+	    NULL, 0},
+	{"ni", "", "nice", NULL, 0, NULL, 0, CHAR, NULL, 0},
+	{"nice", "NI", NULL, "nice", 0, kvar, KOFF(ki_nice), CHAR, "d", 0},
+	{"nivcsw", "NIVCSW", NULL, "involuntary-context-switches", USER, rvar,
+	    ROFF(ru_nivcsw), LONG, "ld", 0},
+	{"nlwp", "NLWP", NULL, "threads", 0, kvar, KOFF(ki_numthreads), UINT,
+	    NLWPFMT, 0},
+	{"nsignals", "", "nsigs", NULL, 0, NULL, 0, CHAR, NULL, 0},
+	{"nsigs", "NSIGS", NULL, "signals-taken", USER, rvar,
+	    ROFF(ru_nsignals), LONG, "ld", 0},
+	{"nswap", "NSWAP", NULL, "swaps", USER, rvar, ROFF(ru_nswap), LONG,
+	    "ld", 0},
+	{"nvcsw", "NVCSW", NULL, "voluntary-context-switches", USER, rvar,
+	    ROFF(ru_nvcsw), LONG, "ld", 0},
+	{"nwchan", "NWCHAN", NULL, "wait-channel-address", LJUST, nwchan, 0,
+	    CHAR, NULL, 0},
+	{"oublk", "OUBLK", NULL, "written-blocks", USER, rvar,
+	    ROFF(ru_oublock), LONG, "ld", 0},
+	{"oublock", "", "oublk", NULL, 0, NULL, 0, CHAR, NULL, 0},
+	{"paddr", "PADDR", NULL, "process-address", 0, kvar, KOFF(ki_paddr),
+	    KPTR, "lx", 0},
+	{"pagein", "PAGEIN", NULL, "pageins", USER, pagein, 0, CHAR, NULL, 0},
+	{"pcpu", "", "%cpu", NULL, 0, NULL, 0, CHAR, NULL, 0},
+	{"pending", "", "sig", NULL, 0, NULL, 0, CHAR, NULL, 0},
+	{"pgid", "PGID", NULL, "process-group", 0, kvar, KOFF(ki_pgid), UINT,
+	    PIDFMT, 0},
+	{"pid", "PID", NULL, "pid", 0, kvar, KOFF(ki_pid), UINT, PIDFMT, 0},
+	{"pmem", "", "%mem", NULL, 0, NULL, 0, CHAR, NULL, 0},
+	{"ppid", "PPID", NULL, "ppid", 0, kvar, KOFF(ki_ppid), UINT, PIDFMT, 0},
+	{"pri", "PRI", NULL, "priority", 0, pri, 0, CHAR, NULL, 0},
+	{"re", "RE", NULL, "residency-time", INF127, kvar, KOFF(ki_swtime),
+	    UINT, "d", 0},
+	{"rgid", "RGID", NULL, "real-gid", 0, kvar, KOFF(ki_rgid), UINT,
+	    UIDFMT, 0},
+	{"rgroup", "RGROUP", NULL, "real-group", LJUST, rgroupname, 0, CHAR,
+	    NULL, 0},
+	{"rss", "RSS", NULL, "rss", 0, kvar, KOFF(ki_rssize), PGTOK, "ld", 0},
+	{"rtprio", "RTPRIO", NULL, "realtime-priority", 0, priorityr,
+	    KOFF(ki_pri), CHAR, NULL, 0},
+	{"ruid", "RUID", NULL, "real-uid", 0, kvar, KOFF(ki_ruid), UINT,
+	    UIDFMT, 0},
+	{"ruser", "RUSER", NULL, "real-user", LJUST, runame, 0, CHAR, NULL, 0},
+	{"sid", "SID", NULL, "sid", 0, kvar, KOFF(ki_sid), UINT, PIDFMT, 0},
+	{"sig", "PENDING", NULL, "signals-pending", 0, kvar, KOFF(ki_siglist),
+	    INT, "x", 0},
+	{"sigcatch", "CAUGHT", NULL, "signals-caught", 0, kvar,
+	    KOFF(ki_sigcatch), UINT, "x", 0},
+	{"sigignore", "IGNORED", NULL, "signals-ignored", 0, kvar,
+	    KOFF(ki_sigignore), UINT, "x", 0},
+	{"sigmask", "BLOCKED", NULL, "signal-mask", 0, kvar, KOFF(ki_sigmask),
+	    UINT, "x", 0},
+	{"sl", "SL", NULL, "sleep-time", INF127, kvar, KOFF(ki_slptime), UINT,
+	    "d", 0},
+	{"ssiz", "SSIZ", NULL, "stack-size", 0, kvar, KOFF(ki_ssize), PGTOK,
+	    "ld", 0},
+	{"start", "STARTED", NULL, "start-time", LJUST|USER, started, 0, CHAR,
+	    NULL, 0},
+	{"stat", "", "state", NULL, 0, NULL, 0, CHAR, NULL, 0},
+	{"state", "STAT", NULL, "state", LJUST, state, 0, CHAR, NULL, 0},
+	{"svgid", "SVGID", NULL, "saved-gid", 0, kvar, KOFF(ki_svgid), UINT,
+	    UIDFMT, 0},
+	{"svuid", "SVUID", NULL, "saved-uid", 0, kvar, KOFF(ki_svuid), UINT,
+	    UIDFMT, 0},
+	{"systime", "SYSTIME", NULL, "system-time", USER, systime, 0, CHAR,
+	    NULL, 0},
+	{"tdaddr", "TDADDR", NULL, "thread-address", 0, kvar, KOFF(ki_tdaddr),
+	    KPTR, "lx", 0},
+	{"tdev", "TDEV", NULL, "terminal-device", 0, tdev, 0, CHAR, NULL, 0},
+	{"tdnam", "TDNAM", NULL, "terminal-device-name", LJUST, tdnam, 0, CHAR,
+	    NULL, 0},
+	{"time", "TIME", NULL, "cpu-time", USER, cputime, 0, CHAR, NULL, 0},
+	{"tpgid", "TPGID", NULL, "terminal-process-gid", 0, kvar,
+	    KOFF(ki_tpgid), UINT, PIDFMT, 0},
+	{"tracer", "TRACER", NULL, "tracer", 0, kvar, KOFF(ki_tracer), UINT,
+	    PIDFMT, 0},
+	{"tsid", "TSID", NULL, "terminal-sid", 0, kvar, KOFF(ki_tsid), UINT,
+	    PIDFMT, 0},
+	{"tsiz", "TSIZ", NULL, "text-size", 0, kvar, KOFF(ki_tsize), PGTOK,
+	    "ld", 0},
+	{"tt", "TT ", NULL, "terminal-name", 0, tname, 0, CHAR, NULL, 0},
+	{"tty", "TTY", NULL, "tty", LJUST, longtname, 0, CHAR, NULL, 0},
+	{"ucomm", "UCOMM", NULL, "accounting-name", LJUST, ucomm, 0, CHAR,
+	    NULL, 0},
+	{"uid", "UID", NULL, "uid", 0, kvar, KOFF(ki_uid), UINT, UIDFMT, 0},
+	{"upr", "UPR", NULL, "user-priority", 0, upr, 0, CHAR, NULL, 0},
+	{"uprocp", "UPROCP", NULL, "process-address", 0, kvar, KOFF(ki_paddr),
+	    KPTR, "lx", 0},
+	{"user", "USER", NULL, "user", LJUST, uname, 0, CHAR, NULL, 0},
+	{"usertime", "USERTIME", NULL, "user-time", USER, usertime, 0, CHAR,
+	    NULL, 0},
+	{"usrpri", "", "upr", NULL, 0, NULL, 0, CHAR, NULL, 0},
+	{"vsize", "", "vsz", NULL, 0, NULL, 0, CHAR, NULL, 0},
+	{"vsz", "VSZ", NULL, "virtual-size", 0, vsize, 0, CHAR, NULL, 0},
+	{"wchan", "WCHAN", NULL, "wait-channel", LJUST, wchan, 0, CHAR, NULL,
+	    0},
+	{"xstat", "XSTAT", NULL, "exit-status", 0, kvar, KOFF(ki_xstat),
+	    USHORT, "x", 0},
+	{"", NULL, NULL, NULL, 0, NULL, 0, CHAR, NULL, 0},
 };
 
 void
@@ -185,16 +240,19 @@ showkey(void)
 
 	i = 0;
 	sep = "";
+	xo_open_list("key");
 	for (v = var; *(p = v->name); ++v) {
 		int len = strlen(p);
 		if (termwidth && (i += len + 1) > termwidth) {
 			i = len;
 			sep = "\n";
 		}
-		(void) printf("%s%s", sep, p);
+		xo_emit("{P:/%s}{l:key/%s}", sep, p);
 		sep = " ";
 	}
-	(void) printf("\n");
+	xo_emit("\n");
+	xo_close_list("key");
+	xo_finish();
 }
 
 void
diff --git a/bin/ps/print.c b/bin/ps/print.c
index 40ecd07..91daa44 100644
--- a/bin/ps/print.c
+++ b/bin/ps/print.c
@@ -61,6 +61,7 @@ __FBSDID("$FreeBSD$");
 #include <string.h>
 #include <unistd.h>
 #include <vis.h>
+#include <libxo/xo.h>
 
 #include "ps.h"
 
@@ -85,15 +86,15 @@ printheader(void)
 		v = vent->var;
 		if (v->flag & LJUST) {
 			if (STAILQ_NEXT(vent, next_ve) == NULL)	/* last one */
-				(void)printf("%s", vent->header);
+				xo_emit("{T:/%s}", vent->header);
 			else
-				(void)printf("%-*s", v->width, vent->header);
+				xo_emit("{T:/%-*s}", v->width, vent->header);
 		} else
-			(void)printf("%*s", v->width, vent->header);
+			xo_emit("{T:/%*s}", v->width, vent->header);
 		if (STAILQ_NEXT(vent, next_ve) != NULL)
-			(void)putchar(' ');
+			xo_emit("{P: }");
 	}
-	(void)putchar('\n');
+	xo_emit("\n");
 }
 
 char *
@@ -102,7 +103,7 @@ arguments(KINFO *k, VARENT *ve)
 	char *vis_args;
 
 	if ((vis_args = malloc(strlen(k->ki_args) * 4 + 1)) == NULL)
-		errx(1, "malloc failed");
+		xo_errx(1, "malloc failed");
 	strvis(vis_args, k->ki_args, VIS_TAB | VIS_NL | VIS_NOSLASH);
 
 	if (STAILQ_NEXT(ve, next_ve) != NULL && strlen(vis_args) > ARGUMENTS_WIDTH)
@@ -130,7 +131,7 @@ command(KINFO *k, VARENT *ve)
 		return (str);
 	}
 	if ((vis_args = malloc(strlen(k->ki_args) * 4 + 1)) == NULL)
-		errx(1, "malloc failed");
+		xo_errx(1, "malloc failed");
 	strvis(vis_args, k->ki_args, VIS_TAB | VIS_NL | VIS_NOSLASH);
 
 	if (STAILQ_NEXT(ve, next_ve) == NULL) {
@@ -139,7 +140,7 @@ command(KINFO *k, VARENT *ve)
 		if (k->ki_env) {
 			if ((vis_env = malloc(strlen(k->ki_env) * 4 + 1))
 			    == NULL)
-				errx(1, "malloc failed");
+				xo_errx(1, "malloc failed");
 			strvis(vis_env, k->ki_env,
 			    VIS_TAB | VIS_NL | VIS_NOSLASH);
 		} else
@@ -215,7 +216,7 @@ state(KINFO *k, VARENT *ve __unused)
 
 	buf = malloc(16);
 	if (buf == NULL)
-		errx(1, "malloc failed");
+		xo_errx(1, "malloc failed");
 
 	flag = k->ki_p->ki_flag;
 	tdflags = k->ki_p->ki_tdflags;	/* XXXKSE */
@@ -391,7 +392,7 @@ started(KINFO *k, VARENT *ve __unused)
 
 	buf = malloc(buflen);
 	if (buf == NULL)
-		errx(1, "malloc failed");
+		xo_errx(1, "malloc failed");
 
 	then = k->ki_p->ki_start.tv_sec;
 	tp = localtime(&then);
@@ -416,7 +417,7 @@ lstarted(KINFO *k, VARENT *ve __unused)
 
 	buf = malloc(buflen);
 	if (buf == NULL)
-		errx(1, "malloc failed");
+		xo_errx(1, "malloc failed");
 
 	then = k->ki_p->ki_start.tv_sec;
 	(void)strftime(buf, buflen, "%c", localtime(&then));
@@ -762,7 +763,7 @@ printval(void *bp, VAR *v)
 		(void)asprintf(&str, ofmt, ps_pgtok(*(u_long *)bp));
 		break;
 	default:
-		errx(1, "unknown type %d", v->type);
+		xo_errx(1, "unknown type %d", v->type);
 	}
 
 	return (str);
@@ -804,7 +805,7 @@ label(KINFO *k, VARENT *ve __unused)
 
 	string = NULL;
 	if (mac_prepare_process_label(&proclabel) == -1) {
-		warn("mac_prepare_process_label");
+		xo_warn("mac_prepare_process_label");
 		goto out;
 	}
 	error = mac_get_pid(k->ki_p->ki_pid, proclabel);
diff --git a/bin/ps/ps.1 b/bin/ps/ps.1
index 6eead76..369e1d7 100644
--- a/bin/ps/ps.1
+++ b/bin/ps/ps.1
@@ -29,7 +29,7 @@
 .\"     @(#)ps.1	8.3 (Berkeley) 4/18/94
 .\" $FreeBSD$
 .\"
-.Dd December 9, 2014
+.Dd May 22, 2015
 .Dt PS 1
 .Os
 .Sh NAME
@@ -37,6 +37,7 @@
 .Nd process status
 .Sh SYNOPSIS
 .Nm
+.Op Fl -libxo
 .Op Fl aCcdefHhjlmrSTuvwXxZ
 .Op Fl O Ar fmt | Fl o Ar fmt
 .Op Fl G Ar gid Ns Op , Ns Ar gid Ns Ar ...
@@ -47,6 +48,7 @@
 .Op Fl t Ar tty Ns Op , Ns Ar tty Ns Ar ...
 .Op Fl U Ar user Ns Op , Ns Ar user Ns Ar ...
 .Nm
+.Op Fl -libxo
 .Op Fl L
 .Sh DESCRIPTION
 The
@@ -733,7 +735,9 @@ Display information on all system processes:
 .Xr procstat 1 ,
 .Xr w 1 ,
 .Xr kvm 3 ,
+.Xr libxo 3
 .Xr strftime 3 ,
+.Xr xo_parse_args 3
 .Xr mac 4 ,
 .Xr procfs 5 ,
 .Xr pstat 8 ,
diff --git a/bin/ps/ps.c b/bin/ps/ps.c
index 449367c..0e5dd56 100644
--- a/bin/ps/ps.c
+++ b/bin/ps/ps.c
@@ -73,6 +73,7 @@ __FBSDID("$FreeBSD$");
 #include <stdlib.h>
 #include <string.h>
 #include <unistd.h>
+#include <libxo/xo.h>
 
 #include "ps.h"
 
@@ -184,7 +185,9 @@ main(int argc, char *argv[])
 	int all, ch, elem, flag, _fmt, i, lineno, linelen, left;
 	int descendancy, nentries, nkept, nselectors;
 	int prtheader, wflag, what, xkeep, xkeep_implied;
+	int fwidthmin, fwidthmax;
 	char errbuf[_POSIX2_LINE_MAX];
+	char fmtbuf[_POSIX2_LINE_MAX];
 
 	(void) setlocale(LC_ALL, "");
 	time(&now);			/* Used by routines in print.c. */
@@ -221,6 +224,11 @@ main(int argc, char *argv[])
 	init_list(&uidlist, addelem_uid, sizeof(uid_t), "user");
 	memf = _PATH_DEVNULL;
 	nlistf = NULL;
+
+	argc = xo_parse_args(argc, argv);
+	if (argc < 0)
+		exit(1);
+
 	while ((ch = getopt(argc, argv, PS_ARGS)) != -1)
 		switch (ch) {
 		case 'A':
@@ -363,7 +371,7 @@ main(int argc, char *argv[])
 #endif
 		case 'T':
 			if ((optarg = ttyname(STDIN_FILENO)) == NULL)
-				errx(1, "stdin: not a terminal");
+				xo_errx(1, "stdin: not a terminal");
 			/* FALLTHROUGH */
 		case 't':
 			add_list(&ttylist, optarg);
@@ -434,8 +442,7 @@ main(int argc, char *argv[])
 		argv++;
 	}
 	if (*argv) {
-		fprintf(stderr, "%s: illegal argument: %s\n",
-		    getprogname(), *argv);
+		xo_warnx("illegal argument: %s\n", *argv);
 		usage();
 	}
 	if (optfatal)
@@ -445,7 +452,7 @@ main(int argc, char *argv[])
 
 	kd = kvm_openfiles(nlistf, memf, NULL, O_RDONLY, errbuf);
 	if (kd == 0)
-		errx(1, "%s", errbuf);
+		xo_errx(1, "%s", errbuf);
 
 	if (!_fmt)
 		parsefmt(dfmt, 0);
@@ -453,7 +460,7 @@ main(int argc, char *argv[])
 	if (nselectors == 0) {
 		uidlist.l.ptr = malloc(sizeof(uid_t));
 		if (uidlist.l.ptr == NULL)
-			errx(1, "malloc failed");
+			xo_errx(1, "malloc failed");
 		nselectors = 1;
 		uidlist.count = uidlist.maxcount = 1;
 		*uidlist.l.uids = getuid();
@@ -515,11 +522,11 @@ main(int argc, char *argv[])
 	nentries = -1;
 	kp = kvm_getprocs(kd, what, flag, &nentries);
 	if ((kp == NULL && nentries > 0) || (kp != NULL && nentries < 0))
-		errx(1, "%s", kvm_geterr(kd));
+		xo_errx(1, "%s", kvm_geterr(kd));
 	nkept = 0;
 	if (nentries > 0) {
 		if ((kinfo = malloc(nentries * sizeof(*kinfo))) == NULL)
-			errx(1, "malloc failed");
+			xo_errx(1, "malloc failed");
 		for (i = nentries; --i >= 0; ++kp) {
 			/*
 			 * If the user specified multiple selection-criteria,
@@ -629,13 +636,18 @@ main(int argc, char *argv[])
 	/*
 	 * Print header.
 	 */
+	xo_open_container("process-information");
 	printheader();
+	if (xo_get_style(NULL) != XO_STYLE_TEXT)
+		termwidth = UNLIMITED;
 
 	/*
 	 * Output formatted lines.
 	 */
+	xo_open_list("process");
 	for (i = lineno = 0; i < nkept; i++) {
 		linelen = 0;
+		xo_open_instance("process");
 		STAILQ_FOREACH(vent, &varlist, next_ve) {
 	        	if (vent->var->flag & LJUST)
 				fmtstr = "%-*s";
@@ -645,21 +657,27 @@ main(int argc, char *argv[])
 			ks = STAILQ_FIRST(&kinfo[i].ki_ks);
 			STAILQ_REMOVE_HEAD(&kinfo[i].ki_ks, ks_next);
 			/* Truncate rightmost column if necessary.  */
+			fwidthmax = _POSIX2_LINE_MAX;
 			if (STAILQ_NEXT(vent, next_ve) == NULL &&
 			   termwidth != UNLIMITED && ks->ks_str != NULL) {
 				left = termwidth - linelen;
 				if (left > 0 && left < (int)strlen(ks->ks_str))
-					ks->ks_str[left] = '\0';
+					fwidthmax = left;
 			}
+
 			str = ks->ks_str;
 			if (str == NULL)
 				str = "-";
 			/* No padding for the last column, if it's LJUST. */
-			if (STAILQ_NEXT(vent, next_ve) == NULL &&
-			    vent->var->flag & LJUST)
-				linelen += printf(fmtstr, 0, str);
-			else
-				linelen += printf(fmtstr, vent->var->width, str);
+			fwidthmin = (xo_get_style(NULL) != XO_STYLE_TEXT ||
+			    (STAILQ_NEXT(vent, next_ve) == NULL &&
+			    (vent->var->flag & LJUST))) ? 0 : vent->var->width;
+			snprintf(fmtbuf, sizeof(fmtbuf), "{:%s/%%%s%d..%ds}",
+			    vent->var->field ?: vent->var->name,
+			    (vent->var->flag & LJUST) ? "-" : "",
+			    fwidthmin, fwidthmax);
+			xo_emit(fmtbuf, str);
+			linelen += fwidthmin;
 
 			if (ks->ks_str != NULL) {
 				free(ks->ks_str);
@@ -669,17 +687,22 @@ main(int argc, char *argv[])
 			ks = NULL;
 
 			if (STAILQ_NEXT(vent, next_ve) != NULL) {
-				(void)putchar(' ');
+				xo_emit("{P: }");
 				linelen++;
 			}
 		}
-		(void)putchar('\n');
+	        xo_emit("\n");
+		xo_close_instance("process");
 		if (prtheader && lineno++ == prtheader - 4) {
-			(void)putchar('\n');
+			xo_emit("\n");
 			printheader();
 			lineno = 0;
 		}
 	}
+	xo_close_list("process");
+	xo_close_container("process-information");
+	xo_finish();
+
 	free_list(&gidlist);
 	free_list(&jidlist);
 	free_list(&pidlist);
@@ -705,9 +728,9 @@ addelem_gid(struct listinfo *inf, const char *elem)
 
 	if (*elem == '\0' || strlen(elem) >= MAXLOGNAME) {
 		if (*elem == '\0')
-			warnx("Invalid (zero-length) %s name", inf->lname);
+			xo_warnx("Invalid (zero-length) %s name", inf->lname);
 		else
-			warnx("%s name too long: %s", inf->lname, elem);
+			xo_warnx("%s name too long: %s", inf->lname, elem);
 		optfatal = 1;
 		return (0);		/* Do not add this value. */
 	}
@@ -732,7 +755,7 @@ addelem_gid(struct listinfo *inf, const char *elem)
 	if (grp == NULL)
 		grp = getgrnam(elem);
 	if (grp == NULL) {
-		warnx("No %s %s '%s'", inf->lname, nameorID, elem);
+		xo_warnx("No %s %s '%s'", inf->lname, nameorID, elem);
 		optfatal = 1;
 		return (0);
 	}
@@ -773,7 +796,7 @@ addelem_pid(struct listinfo *inf, const char *elem)
 	long tempid;
 
 	if (*elem == '\0') {
-		warnx("Invalid (zero-length) process id");
+		xo_warnx("Invalid (zero-length) process id");
 		optfatal = 1;
 		return (0);		/* Do not add this value. */
 	}
@@ -781,10 +804,10 @@ addelem_pid(struct listinfo *inf, const char *elem)
 	errno = 0;
 	tempid = strtol(elem, &endp, 10);
 	if (*endp != '\0' || tempid < 0 || elem == endp) {
-		warnx("Invalid %s: %s", inf->lname, elem);
+		xo_warnx("Invalid %s: %s", inf->lname, elem);
 		errno = ERANGE;
 	} else if (errno != 0 || tempid > pid_max) {
-		warnx("%s too large: %s", inf->lname, elem);
+		xo_warnx("%s too large: %s", inf->lname, elem);
 		errno = ERANGE;
 	}
 	if (errno == ERANGE) {
@@ -855,19 +878,19 @@ addelem_tty(struct listinfo *inf, const char *elem)
 	if (ttypath) {
 		if (stat(ttypath, &sb) == -1) {
 			if (pathbuf3[0] != '\0')
-				warn("%s, %s, and %s", pathbuf3, pathbuf2,
+				xo_warn("%s, %s, and %s", pathbuf3, pathbuf2,
 				    ttypath);
 			else
-				warn("%s", ttypath);
+				xo_warn("%s", ttypath);
 			optfatal = 1;
 			return (0);
 		}
 		if (!S_ISCHR(sb.st_mode)) {
 			if (pathbuf3[0] != '\0')
-				warnx("%s, %s, and %s: Not a terminal",
+				xo_warnx("%s, %s, and %s: Not a terminal",
 				    pathbuf3, pathbuf2, ttypath);
 			else
-				warnx("%s: Not a terminal", ttypath);
+				xo_warnx("%s: Not a terminal", ttypath);
 			optfatal = 1;
 			return (0);
 		}
@@ -887,9 +910,9 @@ addelem_uid(struct listinfo *inf, const char *elem)
 
 	if (*elem == '\0' || strlen(elem) >= MAXLOGNAME) {
 		if (*elem == '\0')
-			warnx("Invalid (zero-length) %s name", inf->lname);
+			xo_warnx("Invalid (zero-length) %s name", inf->lname);
 		else
-			warnx("%s name too long: %s", inf->lname, elem);
+			xo_warnx("%s name too long: %s", inf->lname, elem);
 		optfatal = 1;
 		return (0);		/* Do not add this value. */
 	}
@@ -899,12 +922,12 @@ addelem_uid(struct listinfo *inf, const char *elem)
 		errno = 0;
 		bigtemp = strtoul(elem, &endp, 10);
 		if (errno != 0 || *endp != '\0' || bigtemp > UID_MAX)
-			warnx("No %s named '%s'", inf->lname, elem);
+			xo_warnx("No %s named '%s'", inf->lname, elem);
 		else {
 			/* The string is all digits, so it might be a userID. */
 			pwd = getpwuid((uid_t)bigtemp);
 			if (pwd == NULL)
-				warnx("No %s name or ID matches '%s'",
+				xo_warnx("No %s name or ID matches '%s'",
 				    inf->lname, elem);
 		}
 	}
@@ -961,7 +984,7 @@ add_list(struct listinfo *inf, const char *argp)
 			while (*argp != '\0' && strchr(W_SEP T_SEP,
 			    *argp) == NULL)
 				argp++;
-			warnx("Value too long: %.*s", (int)(argp - savep),
+			xo_warnx("Value too long: %.*s", (int)(argp - savep),
 			    savep);
 			optfatal = 1;
 		}
@@ -1062,7 +1085,7 @@ descendant_sort(KINFO *ki, int items)
 			continue;
 		}
 		if ((ki[src].ki_d.prefix = malloc(lvl * 2 + 1)) == NULL)
-			errx(1, "malloc failed");
+			xo_errx(1, "malloc failed");
 		for (n = 0; n < lvl - 2; n++) {
 			ki[src].ki_d.prefix[n * 2] =
 			    path[n / 8] & 1 << (n % 8) ? '|' : ' ';
@@ -1100,7 +1123,7 @@ expand_list(struct listinfo *inf)
 	newlist = realloc(inf->l.ptr, newmax * inf->elemsize);
 	if (newlist == NULL) {
 		free(inf->l.ptr);
-		errx(1, "realloc to %d %ss failed", newmax, inf->lname);
+		xo_errx(1, "realloc to %d %ss failed", newmax, inf->lname);
 	}
 	inf->maxcount = newmax;
 	inf->l.ptr = newlist;
@@ -1174,7 +1197,7 @@ format_output(KINFO *ki)
 		str = (v->oproc)(ki, vent);
 		ks = malloc(sizeof(*ks));
 		if (ks == NULL)
-			errx(1, "malloc failed");
+			xo_errx(1, "malloc failed");
 		ks->ks_str = str;
 		STAILQ_INSERT_TAIL(&ki->ki_ks, ks, ks_next);
 		if (str != NULL) {
@@ -1240,7 +1263,7 @@ saveuser(KINFO *ki)
 		else
 			asprintf(&ki->ki_args, "(%s)", ki->ki_p->ki_comm);
 		if (ki->ki_args == NULL)
-			errx(1, "malloc failed");
+			xo_errx(1, "malloc failed");
 	} else {
 		ki->ki_args = NULL;
 	}
@@ -1251,7 +1274,7 @@ saveuser(KINFO *ki)
 		else
 			ki->ki_env = strdup("()");
 		if (ki->ki_env == NULL)
-			errx(1, "malloc failed");
+			xo_errx(1, "malloc failed");
 	} else {
 		ki->ki_env = NULL;
 	}
@@ -1372,7 +1395,7 @@ kludge_oldps_options(const char *optlist, char *origval, const char *nextarg)
 	 * original value.
 	 */
 	if ((newopts = ns = malloc(len + 3)) == NULL)
-		errx(1, "malloc failed");
+		xo_errx(1, "malloc failed");
 
 	if (*origval != '-')
 		*ns++ = '-';	/* add option flag */
@@ -1401,7 +1424,7 @@ pidmax_init(void)
 
 	intsize = sizeof(pid_max);
 	if (sysctlbyname("kern.pid_max", &pid_max, &intsize, NULL, 0) < 0) {
-		warn("unable to read kern.pid_max");
+		xo_warn("unable to read kern.pid_max");
 		pid_max = 99999;
 	}
 }
@@ -1411,7 +1434,7 @@ usage(void)
 {
 #define	SINGLE_OPTS	"[-aCcde" OPT_LAZY_f "HhjlmrSTuvwXxZ]"
 
-	(void)fprintf(stderr, "%s\n%s\n%s\n%s\n",
+	(void)xo_error("%s\n%s\n%s\n%s\n",
 	    "usage: ps " SINGLE_OPTS " [-O fmt | -o fmt] [-G gid[,gid...]]",
 	    "          [-J jid[,jid...]] [-M core] [-N system]",
 	    "          [-p pid[,pid...]] [-t tty[,tty...]] [-U user[,user...]]",
diff --git a/bin/ps/ps.h b/bin/ps/ps.h
index 86aaeb0..314fbf2 100644
--- a/bin/ps/ps.h
+++ b/bin/ps/ps.h
@@ -65,6 +65,7 @@ typedef struct var {
 	const char *name;	/* name(s) of variable */
 	const char *header;	/* default header */
 	const char *alias;	/* aliases */
+	const char *field;	/* xo field name */
 #define	COMM	0x01		/* needs exec arguments and environment (XXX) */
 #define	LJUST	0x02		/* left adjust on output (trailing blanks) */
 #define	USER	0x04		/* needs user structure */