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-rw-r--r--bin/ps/keyword.c483
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diff --git a/bin/ps/keyword.c b/bin/ps/keyword.c
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+++ b/bin/ps/keyword.c
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+/*-
+ * SPDX-License-Identifier: BSD-3-Clause
+ *
+ * Copyright (c) 1990, 1993, 1994
+ * The Regents of the University of California. All rights reserved.
+ * Copyright (c) 2025 The FreeBSD Foundation
+ *
+ * Portions of this software were developed by Olivier Certner
+ * <olce@FreeBSD.org> at Kumacom SARL under sponsorship from the FreeBSD
+ * Foundation.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. Neither the name of the University nor the names of its contributors
+ * may be used to endorse or promote products derived from this software
+ * without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <sys/param.h>
+#include <sys/time.h>
+#include <sys/resource.h>
+#include <sys/proc.h>
+#include <sys/sysctl.h>
+#include <sys/user.h>
+
+#include <assert.h>
+#include <stdbool.h>
+#include <stddef.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include <libxo/xo.h>
+
+#include "ps.h"
+
+static int vcmp(const void *, const void *);
+
+/* Compute offset in common structures. */
+#define KOFF(x) offsetof(struct kinfo_proc, x)
+#define ROFF(x) offsetof(struct rusage, x)
+
+#define LWPFMT "d"
+#define NLWPFMT "d"
+#define UIDFMT "u"
+#define PIDFMT "d"
+
+/* PLEASE KEEP THE TABLE BELOW SORTED ALPHABETICALLY!!! */
+static VAR keywords[] = {
+ {"%cpu", {NULL}, "%CPU", "percent-cpu", 0, pcpu, 0, UNSPEC, NULL},
+ {"%mem", {NULL}, "%MEM", "percent-memory", 0, pmem, 0, UNSPEC, NULL},
+ {"acflag", {NULL}, "ACFLG", "accounting-flag", 0, kvar, KOFF(ki_acflag),
+ USHORT, "x"},
+ {"acflg", {"acflag"}, NULL, NULL, 0, NULL, 0, UNSPEC, NULL},
+ {"args", {NULL}, "COMMAND", "arguments", COMM|LJUST|USER, arguments, 0,
+ UNSPEC, NULL},
+ {"blocked", {"sigmask"}, NULL, NULL, 0, NULL, 0, UNSPEC, NULL},
+ {"caught", {"sigcatch"}, NULL, NULL, 0, NULL, 0, UNSPEC, NULL},
+ {"class", {NULL}, "CLASS", "login-class", LJUST, loginclass, 0,
+ UNSPEC, NULL},
+ {"comm", {NULL}, "COMMAND", "command", LJUST, ucomm, 0, UNSPEC, NULL},
+ {"command", {NULL}, "COMMAND", "command", COMM|LJUST|USER, command, 0,
+ UNSPEC, NULL},
+ {"cow", {NULL}, "COW", "copy-on-write-faults", 0, kvar, KOFF(ki_cow),
+ UINT, "u"},
+ {"cpu", {NULL}, "C", "on-cpu", 0, cpunum, 0, UNSPEC, NULL},
+ {"cputime", {"time"}, NULL, NULL, 0, NULL, 0, UNSPEC, NULL},
+ {"dsiz", {NULL}, "DSIZ", "data-size", 0, kvar, KOFF(ki_dsize),
+ PGTOK, "ld"},
+ {"egid", {"gid"}, NULL, NULL, 0, NULL, 0, UNSPEC, NULL},
+ {"egroup", {"group"}, NULL, NULL, 0, NULL, 0, UNSPEC, NULL},
+ {"emul", {NULL}, "EMUL", "emulation-envirnment", LJUST, emulname, 0,
+ UNSPEC, NULL},
+ {"etime", {NULL}, "ELAPSED", "elapsed-time", USER, elapsed, 0,
+ UNSPEC, NULL},
+ {"etimes", {NULL}, "ELAPSED", "elapsed-times", USER, elapseds, 0,
+ UNSPEC, NULL},
+ {"euid", {"uid"}, NULL, NULL, 0, NULL, 0, UNSPEC, NULL},
+ {"f", {NULL}, "F", "flags", 0, kvar, KOFF(ki_flag), LONG, "lx"},
+ {"f2", {NULL}, "F2", "flags2", 0, kvar, KOFF(ki_flag2), INT, "08x"},
+ {"fib", {NULL}, "FIB", "fib", 0, kvar, KOFF(ki_fibnum), INT, "d"},
+ {"flags", {"f"}, NULL, NULL, 0, NULL, 0, UNSPEC, NULL},
+ {"flags2", {"f2"}, NULL, NULL, 0, NULL, 0, UNSPEC, NULL},
+ {"gid", {NULL}, "GID", "gid", 0, kvar, KOFF(ki_groups), UINT, UIDFMT},
+ {"group", {NULL}, "GROUP", "group", LJUST, egroupname, 0, UNSPEC, NULL},
+ {"ignored", {"sigignore"}, NULL, NULL, 0, NULL, 0, UNSPEC, NULL},
+ {"inblk", {NULL}, "INBLK", "read-blocks", USER, rvar, ROFF(ru_inblock),
+ LONG, "ld"},
+ {"inblock", {"inblk"}, NULL, NULL, 0, NULL, 0, UNSPEC, NULL},
+ {"jail", {NULL}, "JAIL", "jail-name", LJUST, jailname, 0, UNSPEC, NULL},
+ {"jid", {NULL}, "JID", "jail-id", 0, kvar, KOFF(ki_jid), INT, "d"},
+ {"jobc", {NULL}, "JOBC", "job-control-count", 0, kvar, KOFF(ki_jobc),
+ SHORT, "d"},
+ {"ktrace", {NULL}, "KTRACE", "ktrace", 0, kvar, KOFF(ki_traceflag),
+ INT, "x"},
+ {"label", {NULL}, "LABEL", "label", LJUST, label, 0, UNSPEC, NULL},
+ {"lim", {NULL}, "LIM", "memory-limit", 0, maxrss, 0, UNSPEC, NULL},
+ {"lockname", {NULL}, "LOCK", "lock-name", LJUST, lockname, 0,
+ UNSPEC, NULL},
+ {"login", {NULL}, "LOGIN", "login-name", LJUST, logname, 0,
+ UNSPEC, NULL},
+ {"logname", {"login"}, NULL, NULL, 0, NULL, 0, UNSPEC, NULL},
+ {"lstart", {NULL}, "STARTED", "start-time", LJUST|USER, lstarted, 0,
+ UNSPEC, NULL},
+ {"lwp", {NULL}, "LWP", "thread-id", 0, kvar, KOFF(ki_tid),
+ UINT, LWPFMT},
+ {"majflt", {NULL}, "MAJFLT", "major-faults", USER, rvar, ROFF(ru_majflt),
+ LONG, "ld"},
+ {"minflt", {NULL}, "MINFLT", "minor-faults", USER, rvar, ROFF(ru_minflt),
+ LONG, "ld"},
+ {"msgrcv", {NULL}, "MSGRCV", "received-messages", USER, rvar,
+ ROFF(ru_msgrcv), LONG, "ld"},
+ {"msgsnd", {NULL}, "MSGSND", "sent-messages", USER, rvar,
+ ROFF(ru_msgsnd), LONG, "ld"},
+ {"mwchan", {NULL}, "MWCHAN", "wait-channel", LJUST, mwchan, 0,
+ UNSPEC, NULL},
+ {"ni", {"nice"}, NULL, NULL, 0, NULL, 0, UNSPEC, NULL},
+ {"nice", {NULL}, "NI", "nice", 0, kvar, KOFF(ki_nice), CHAR, "d"},
+ {"nivcsw", {NULL}, "NIVCSW", "involuntary-context-switches", USER, rvar,
+ ROFF(ru_nivcsw), LONG, "ld"},
+ {"nlwp", {NULL}, "NLWP", "threads", 0, kvar, KOFF(ki_numthreads),
+ UINT, NLWPFMT},
+ {"nsignals", {"nsigs"}, NULL, NULL, 0, NULL, 0, UNSPEC, NULL},
+ {"nsigs", {NULL}, "NSIGS", "signals-taken", USER, rvar,
+ ROFF(ru_nsignals), LONG, "ld"},
+ {"nswap", {NULL}, "NSWAP", "swaps", USER, rvar, ROFF(ru_nswap),
+ LONG, "ld"},
+ {"nvcsw", {NULL}, "NVCSW", "voluntary-context-switches", USER, rvar,
+ ROFF(ru_nvcsw), LONG, "ld"},
+ {"nwchan", {NULL}, "NWCHAN", "wait-channel-address", LJUST, nwchan, 0,
+ UNSPEC, NULL},
+ {"oublk", {NULL}, "OUBLK", "written-blocks", USER, rvar,
+ ROFF(ru_oublock), LONG, "ld"},
+ {"oublock", {"oublk"}, NULL, NULL, 0, NULL, 0, UNSPEC, NULL},
+ {"paddr", {NULL}, "PADDR", "process-address", 0, kvar, KOFF(ki_paddr),
+ KPTR, "lx"},
+ {"pagein", {NULL}, "PAGEIN", "pageins", USER, pagein, 0, UNSPEC, NULL},
+ {"pcpu", {"%cpu"}, NULL, NULL, 0, NULL, 0, UNSPEC, NULL},
+ {"pending", {"sig"}, NULL, NULL, 0, NULL, 0, UNSPEC, NULL},
+ {"pgid", {NULL}, "PGID", "process-group", 0, kvar, KOFF(ki_pgid),
+ UINT, PIDFMT},
+ {"pid", {NULL}, "PID", "pid", 0, kvar, KOFF(ki_pid), UINT, PIDFMT},
+ {"pmem", {"%mem"}, NULL, NULL, 0, NULL, 0, UNSPEC, NULL},
+ {"ppid", {NULL}, "PPID", "ppid", 0, kvar, KOFF(ki_ppid), UINT, PIDFMT},
+ {"pri", {NULL}, "PRI", "priority", 0, pri, 0, UNSPEC, NULL},
+ {"re", {NULL}, "RE", "residency-time", INF127, kvar, KOFF(ki_swtime),
+ UINT, "d"},
+ {"rgid", {NULL}, "RGID", "real-gid", 0, kvar, KOFF(ki_rgid),
+ UINT, UIDFMT},
+ {"rgroup", {NULL}, "RGROUP", "real-group", LJUST, rgroupname, 0,
+ UNSPEC, NULL},
+ {"rss", {NULL}, "RSS", "rss", 0, kvar, KOFF(ki_rssize), PGTOK, "ld"},
+ {"rtprio", {NULL}, "RTPRIO", "realtime-priority", 0, priorityr,
+ KOFF(ki_pri), UNSPEC, NULL},
+ {"ruid", {NULL}, "RUID", "real-uid", 0, kvar, KOFF(ki_ruid),
+ UINT, UIDFMT},
+ {"ruser", {NULL}, "RUSER", "real-user", LJUST, runame, 0, UNSPEC, NULL},
+ {"sid", {NULL}, "SID", "sid", 0, kvar, KOFF(ki_sid), UINT, PIDFMT},
+ {"sig", {NULL}, "PENDING", "signals-pending", 0, kvar, KOFF(ki_siglist),
+ INT, "x"},
+ {"sigcatch", {NULL}, "CAUGHT", "signals-caught", 0, kvar,
+ KOFF(ki_sigcatch), UINT, "x"},
+ {"sigignore", {NULL}, "IGNORED", "signals-ignored", 0, kvar,
+ KOFF(ki_sigignore), UINT, "x"},
+ {"sigmask", {NULL}, "BLOCKED", "signal-mask", 0, kvar, KOFF(ki_sigmask),
+ UINT, "x"},
+ {"sl", {NULL}, "SL", "sleep-time", INF127, kvar, KOFF(ki_slptime),
+ UINT, "d"},
+ {"ssiz", {NULL}, "SSIZ", "stack-size", 0, kvar, KOFF(ki_ssize),
+ PGTOK, "ld"},
+ {"start", {NULL}, "STARTED", "start-time", LJUST|USER, started, 0,
+ UNSPEC, NULL},
+ {"stat", {"state"}, NULL, NULL, 0, NULL, 0, UNSPEC, NULL},
+ {"state", {NULL}, "STAT", "state", LJUST, state, 0, UNSPEC, NULL},
+ {"svgid", {NULL}, "SVGID", "saved-gid", 0, kvar, KOFF(ki_svgid),
+ UINT, UIDFMT},
+ {"svuid", {NULL}, "SVUID", "saved-uid", 0, kvar, KOFF(ki_svuid),
+ UINT, UIDFMT},
+ {"systime", {NULL}, "SYSTIME", "system-time", USER, systime, 0,
+ UNSPEC, NULL},
+ {"tdaddr", {NULL}, "TDADDR", "thread-address", 0, kvar, KOFF(ki_tdaddr),
+ KPTR, "lx"},
+ {"tdev", {NULL}, "TDEV", "terminal-device", 0, tdev, 0, UNSPEC, NULL},
+ {"tdnam", {"tdname"}, NULL, NULL, 0, NULL, 0, UNSPEC, NULL},
+ {"tdname", {NULL}, "TDNAME", "thread-name", LJUST, tdnam, 0,
+ UNSPEC, NULL},
+ {"tid", {"lwp"}, NULL, NULL, 0, NULL, 0, UNSPEC, NULL},
+ {"time", {NULL}, "TIME", "cpu-time", USER, cputime, 0, UNSPEC, NULL},
+ {"tpgid", {NULL}, "TPGID", "terminal-process-gid", 0, kvar,
+ KOFF(ki_tpgid), UINT, PIDFMT},
+ {"tracer", {NULL}, "TRACER", "tracer", 0, kvar, KOFF(ki_tracer),
+ UINT, PIDFMT},
+ {"tsid", {NULL}, "TSID", "terminal-sid", 0, kvar, KOFF(ki_tsid),
+ UINT, PIDFMT},
+ {"tsiz", {NULL}, "TSIZ", "text-size", 0, kvar, KOFF(ki_tsize),
+ PGTOK, "ld"},
+ {"tt", {NULL}, "TT ", "terminal-name", 0, tname, 0, UNSPEC, NULL},
+ {"tty", {NULL}, "TTY", "tty", LJUST, longtname, 0, UNSPEC, NULL},
+ {"ucomm", {NULL}, "UCOMM", "accounting-name", LJUST, ucomm, 0,
+ UNSPEC, NULL},
+ {"uid", {NULL}, "UID", "uid", 0, kvar, KOFF(ki_uid), UINT, UIDFMT},
+ {"upr", {NULL}, "UPR", "user-priority", 0, upr, 0, UNSPEC, NULL},
+ {"uprocp", {NULL}, "UPROCP", "process-address", 0, kvar, KOFF(ki_paddr),
+ KPTR, "lx"},
+ {"user", {NULL}, "USER", "user", LJUST, username, 0, UNSPEC, NULL},
+ {"usertime", {NULL}, "USERTIME", "user-time", USER, usertime, 0,
+ UNSPEC, NULL},
+ {"usrpri", {"upr"}, NULL, NULL, 0, NULL, 0, UNSPEC, NULL},
+ {"vmaddr", {NULL}, "VMADDR", "vmspace-address", 0, kvar,
+ KOFF(ki_vmspace), KPTR, "lx"},
+ {"vsize", {"vsz"}, NULL, NULL, 0, NULL, 0, UNSPEC, NULL},
+ {"vsz", {NULL}, "VSZ", "virtual-size", 0, vsize, 0, UNSPEC, NULL},
+ {"wchan", {NULL}, "WCHAN", "wait-channel", LJUST, wchan, 0,
+ UNSPEC, NULL},
+ {"xstat", {NULL}, "XSTAT", "exit-status", 0, kvar, KOFF(ki_xstat),
+ USHORT, "x"},
+};
+
+const size_t known_keywords_nb = nitems(keywords);
+
+size_t
+aliased_keyword_index(const VAR *const v)
+{
+ const VAR *const fv = (v->flag & RESOLVED_ALIAS) == 0 ?
+ v : v->final_kw;
+ const size_t idx = fv - keywords;
+
+ assert(idx < known_keywords_nb);
+ return (idx);
+}
+
+/*
+ * Sanity checks on declared keywords.
+ *
+ * Checks specific to aliases are done in resolve_alias() instead.
+ *
+ * Currently, only checks that keywords are alphabetically ordered by their
+ * names. More checks could be added, such as the absence of type (UNSPEC),
+ * 'fmt' (NULL) when the output routine is not kval()/rval().
+ *
+ * Called from main() on PS_CHECK_KEYWORDS, else available when debugging.
+ */
+void
+check_keywords(void)
+{
+ const VAR *k, *next_k;
+ bool order_violated = false;
+
+ k = &keywords[0];
+ for (size_t i = 1; i < known_keywords_nb; ++i) {
+ next_k = &keywords[i];
+ if (vcmp(k, next_k) >= 0) {
+ xo_warnx("keywords bad order: '%s' followed by '%s'",
+ k->name, next_k->name);
+ order_violated = true;
+ }
+ k = next_k;
+ }
+ if (order_violated)
+ /* Must be the case as we rely on bsearch() + vcmp(). */
+ xo_errx(2, "keywords are not in ascending order "
+ "(internal error)");
+}
+
+static void
+alias_errx(const char *const name, const char *const what)
+{
+ xo_errx(2, "alias keyword '%s' specifies %s (internal error)",
+ name, what);
+}
+
+static void
+merge_alias(VAR *const k, VAR *const tgt)
+{
+ if ((tgt->flag & RESOLVED_ALIAS) != 0)
+ k->final_kw = tgt->final_kw;
+ else {
+ k->final_kw = tgt;
+ assert(tgt->aliased == NULL);
+ }
+
+#define MERGE_IF_SENTINEL(field, sentinel) do { \
+ if (k->field == sentinel) \
+ k->field = tgt->field; \
+} while (0)
+
+ MERGE_IF_SENTINEL(header, NULL);
+ MERGE_IF_SENTINEL(field, NULL);
+ /* If NOINHERIT is present, no merge occurs. */
+ MERGE_IF_SENTINEL(flag, 0);
+
+#undef MERGE_IF_SENTINEL
+
+ /* We also check that aliases don't specify things they should not. */
+#define MERGE_CHECK_SENTINEL(field, sentinel, field_descr) do { \
+ if (k->field != sentinel) \
+ alias_errx(k->name, field_descr); \
+ k->field = tgt->field; \
+} while (0);
+
+ MERGE_CHECK_SENTINEL(oproc, NULL, "an output routine");
+ MERGE_CHECK_SENTINEL(off, 0, "a structure offset");
+ MERGE_CHECK_SENTINEL(type, UNSPEC, "a different type than UNSPEC");
+ MERGE_CHECK_SENTINEL(fmt, NULL, "a printf format");
+
+#undef MERGE_CHECK_SENTINEL
+}
+
+static void
+resolve_alias(VAR *const k)
+{
+ VAR *t, key;
+
+ if ((k->flag & RESOLVED_ALIAS) != 0 || k->aliased == NULL)
+ return;
+
+ if ((k->flag & RESOLVING_ALIAS) != 0)
+ xo_errx(2, "cycle when resolving alias keyword '%s'", k->name);
+ k->flag |= RESOLVING_ALIAS;
+
+ key.name = k->aliased;
+ t = bsearch(&key, keywords, known_keywords_nb, sizeof(VAR), vcmp);
+ if (t == NULL)
+ xo_errx(2, "unknown target '%s' for keyword alias '%s'",
+ k->aliased, k->name);
+
+ resolve_alias(t);
+ merge_alias(k, t);
+
+ k->flag &= ~RESOLVING_ALIAS;
+ k->flag |= RESOLVED_ALIAS;
+}
+
+/*
+ * Resolve all aliases immediately.
+ *
+ * Called from main() on PS_CHECK_KEYWORDS, else available when debugging.
+ */
+void
+resolve_aliases(void)
+{
+ for (size_t i = 0; i < known_keywords_nb; ++i)
+ resolve_alias(&keywords[i]);
+}
+
+void
+showkey(void)
+{
+ const VAR *v;
+ const VAR *const end = keywords + known_keywords_nb;
+ const char *sep;
+ int i;
+
+ i = 0;
+ sep = "";
+ xo_open_list("key");
+ for (v = keywords; v < end; ++v) {
+ const char *const p = v->name;
+ const int len = strlen(p);
+
+ if (termwidth && (i += len + 1) > termwidth) {
+ i = len;
+ sep = "\n";
+ }
+ xo_emit("{P:/%hs}{l:key/%hs}", sep, p);
+ sep = " ";
+ }
+ xo_emit("\n");
+ xo_close_list("key");
+ if (xo_finish() < 0)
+ xo_err(1, "stdout");
+}
+
+void
+parsefmt(const char *p, struct velisthead *const var_list,
+ const int user)
+{
+ char *copy, *cp;
+ char *hdr_p, sep;
+ size_t sep_idx;
+ VAR *v, key;
+ struct varent *vent;
+
+ cp = copy = strdup(p);
+ if (copy == NULL)
+ xo_err(1, "strdup");
+
+ sep = cp[0]; /* We only care if it's 0 or not here. */
+ sep_idx = -1;
+ while (sep != '\0') {
+ cp += sep_idx + 1;
+
+ /*
+ * If an item contains an equals sign, it specifies a column
+ * header, may contain embedded separator characters and
+ * is always the last item.
+ */
+ sep_idx = strcspn(cp, "= \t,\n");
+ sep = cp[sep_idx];
+ cp[sep_idx] = 0;
+ if (sep == '=') {
+ hdr_p = cp + sep_idx + 1;
+ sep = '\0'; /* No more keywords. */
+ } else
+ hdr_p = NULL;
+
+ /* At this point, '*cp' is '\0' iff 'sep_idx' is 0. */
+ if (*cp == '\0') {
+ /*
+ * Empty keyword. Skip it, and silently unless some
+ * header has been specified.
+ */
+ if (hdr_p != NULL)
+ xo_warnx("empty keyword with header '%s'",
+ hdr_p);
+ continue;
+ }
+
+ /* Find the keyword. */
+ key.name = cp;
+ v = bsearch(&key, keywords,
+ known_keywords_nb, sizeof(VAR), vcmp);
+ if (v == NULL) {
+ xo_warnx("%s: keyword not found", cp);
+ eval = 1;
+ continue;
+ }
+
+#ifndef PS_CHECK_KEYWORDS
+ /*
+ * On PS_CHECK_KEYWORDS, this is not necessary as all aliases
+ * are resolved at startup in main() by calling
+ * resolve_aliases().
+ */
+ resolve_alias(v);
+#endif
+
+ if ((vent = malloc(sizeof(struct varent))) == NULL)
+ xo_errx(1, "malloc failed");
+ vent->header = v->header;
+ if (hdr_p) {
+ hdr_p = strdup(hdr_p);
+ if (hdr_p)
+ vent->header = hdr_p;
+ }
+ vent->width = strlen(vent->header);
+ vent->var = v;
+ vent->flags = user ? VE_KEEP : 0;
+ STAILQ_INSERT_TAIL(var_list, vent, next_ve);
+ }
+
+ free(copy);
+
+ if (STAILQ_EMPTY(var_list)) {
+ xo_warnx("no valid keywords; valid keywords:");
+ showkey();
+ exit(1);
+ }
+}
+
+static int
+vcmp(const void *a, const void *b)
+{
+ return (strcmp(((const VAR *)a)->name, ((const VAR *)b)->name));
+}
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