3 * The Regents of the University of California. All rights reserved.
5 * This code is derived from software contributed to Berkeley by
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9 * modification, are permitted provided that the following conditions
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22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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35 static char sccsid[] = "@(#)eval.c 8.9 (Berkeley) 6/8/95";
38 #include <sys/cdefs.h>
39 __FBSDID("$FreeBSD$");
45 #include <sys/resource.h>
46 #include <sys/wait.h> /* For WIFSIGNALED(status) */
73 #include "myhistedit.h"
77 int evalskip; /* set if we are skipping commands */
78 int skipcount; /* number of levels to skip */
79 static int loopnest; /* current loop nesting level */
80 int funcnest; /* depth of function calls */
81 static int builtin_flags; /* evalcommand flags for builtins */
85 struct strlist *cmdenviron;
86 int exitstatus; /* exit status of last command */
87 int oexitstatus; /* saved exit status */
90 static void evalloop(union node *, int);
91 static void evalfor(union node *, int);
92 static union node *evalcase(union node *);
93 static void evalsubshell(union node *, int);
94 static void evalredir(union node *, int);
95 static void exphere(union node *, struct arglist *);
96 static void expredir(union node *);
97 static void evalpipe(union node *);
98 static int is_valid_fast_cmdsubst(union node *n);
99 static void evalcommand(union node *, int, struct backcmd *);
100 static void prehash(union node *);
104 * Called to reset things after an exception.
120 evalcmd(int argc, char **argv)
129 STARTSTACKSTR(concat);
133 if ((p = *ap++) == NULL)
137 STPUTC('\0', concat);
138 p = grabstackstr(concat);
140 evalstring(p, builtin_flags);
148 * Execute a command or commands contained in a string.
152 evalstring(const char *s, int flags)
155 struct stackmark smark;
159 flags_exit = flags & EV_EXIT;
162 setstackmark(&smark);
163 setinputstring(s, 1);
164 while ((n = parsecmd(0)) != NEOF) {
165 if (n != NULL && !nflag) {
166 if (flags_exit && preadateof())
167 evaltree(n, flags | EV_EXIT);
174 popstackmark(&smark);
175 setstackmark(&smark);
178 popstackmark(&smark);
187 * Evaluate a parse tree. The value is left in the global variable
192 evaltree(union node *n, int flags)
196 struct stackmark smark;
198 setstackmark(&smark);
201 TRACE(("evaltree(NULL) called\n"));
208 displayhist = 1; /* show history substitutions done with fc */
210 TRACE(("evaltree(%p: %d) called\n", (void *)n, n->type));
213 evaltree(n->nbinary.ch1, flags & ~EV_EXIT);
216 next = n->nbinary.ch2;
219 evaltree(n->nbinary.ch1, EV_TESTED);
220 if (evalskip || exitstatus != 0) {
223 next = n->nbinary.ch2;
226 evaltree(n->nbinary.ch1, EV_TESTED);
227 if (evalskip || exitstatus == 0)
229 next = n->nbinary.ch2;
235 evalsubshell(n, flags);
236 do_etest = !(flags & EV_TESTED);
239 evalsubshell(n, flags);
242 evaltree(n->nif.test, EV_TESTED);
246 next = n->nif.ifpart;
247 else if (n->nif.elsepart)
248 next = n->nif.elsepart;
255 evalloop(n, flags & ~EV_EXIT);
258 evalfor(n, flags & ~EV_EXIT);
264 next = n->nclist.body;
267 if (n->nclist.body) {
268 evaltree(n->nclist.body, flags & ~EV_EXIT);
272 next = n->nclist.next;
275 defun(n->narg.text, n->narg.next);
279 evaltree(n->nnot.com, EV_TESTED);
282 exitstatus = !exitstatus;
287 do_etest = !(flags & EV_TESTED);
290 evalcommand(n, flags, (struct backcmd *)NULL);
291 do_etest = !(flags & EV_TESTED);
294 out1fmt("Node type = %d\n", n->type);
299 popstackmark(&smark);
300 setstackmark(&smark);
303 popstackmark(&smark);
306 if (eflag && exitstatus != 0 && do_etest)
307 exitshell(exitstatus);
314 evalloop(union node *n, int flags)
322 evaltree(n->nbinary.ch1, EV_TESTED);
324 if (evalskip == SKIPCONT && --skipcount <= 0) {
328 if (evalskip == SKIPBREAK && --skipcount <= 0)
330 if (evalskip == SKIPRETURN)
334 if (n->type == NWHILE) {
341 evaltree(n->nbinary.ch2, flags);
351 evalfor(union node *n, int flags)
353 struct arglist arglist;
358 arglist.lastp = &arglist.list;
359 for (argp = n->nfor.args ; argp ; argp = argp->narg.next) {
360 oexitstatus = exitstatus;
361 expandarg(argp, &arglist, EXP_FULL | EXP_TILDE);
363 *arglist.lastp = NULL;
367 for (sp = arglist.list ; sp ; sp = sp->next) {
368 setvar(n->nfor.var, sp->text, 0);
369 evaltree(n->nfor.body, flags);
372 if (evalskip == SKIPCONT && --skipcount <= 0) {
376 if (evalskip == SKIPBREAK && --skipcount <= 0)
387 * Evaluate a case statement, returning the selected tree.
389 * The exit status needs care to get right.
393 evalcase(union node *n)
397 struct arglist arglist;
399 arglist.lastp = &arglist.list;
400 oexitstatus = exitstatus;
401 expandarg(n->ncase.expr, &arglist, EXP_TILDE);
402 for (cp = n->ncase.cases ; cp ; cp = cp->nclist.next) {
403 for (patp = cp->nclist.pattern ; patp ; patp = patp->narg.next) {
404 if (casematch(patp, arglist.list->text)) {
405 while (cp->nclist.next &&
406 cp->type == NCLISTFALLTHRU &&
407 cp->nclist.body == NULL)
408 cp = cp->nclist.next;
409 if (cp->nclist.next &&
410 cp->type == NCLISTFALLTHRU)
412 if (cp->nclist.body == NULL)
414 return (cp->nclist.body);
425 * Kick off a subshell to evaluate a tree.
429 evalsubshell(union node *n, int flags)
432 int backgnd = (n->type == NBACKGND);
434 oexitstatus = exitstatus;
435 expredir(n->nredir.redirect);
436 if ((!backgnd && flags & EV_EXIT && !have_traps()) ||
437 forkshell(jp = makejob(n, 1), n, backgnd) == 0) {
440 redirect(n->nredir.redirect, 0);
441 evaltree(n->nredir.n, flags | EV_EXIT); /* never returns */
442 } else if (!backgnd) {
444 exitstatus = waitforjob(jp, (int *)NULL);
452 * Evaluate a redirected compound command.
456 evalredir(union node *n, int flags)
458 struct jmploc jmploc;
459 struct jmploc *savehandler;
460 volatile int in_redirect = 1;
462 oexitstatus = exitstatus;
463 expredir(n->nredir.redirect);
464 savehandler = handler;
465 if (setjmp(jmploc.loc)) {
468 handler = savehandler;
471 if (e == EXERROR || e == EXEXEC) {
477 longjmp(handler->loc, 1);
481 redirect(n->nredir.redirect, REDIR_PUSH);
484 evaltree(n->nredir.n, flags);
487 handler = savehandler;
494 exphere(union node *redir, struct arglist *fn)
496 struct jmploc jmploc;
497 struct jmploc *savehandler;
498 struct localvar *savelocalvars;
499 int need_longjmp = 0;
501 redir->nhere.expdoc = "";
502 savelocalvars = localvars;
505 savehandler = handler;
506 if (setjmp(jmploc.loc))
507 need_longjmp = exception != EXERROR && exception != EXEXEC;
510 expandarg(redir->nhere.doc, fn, 0);
511 redir->nhere.expdoc = fn->list->text;
514 handler = savehandler;
517 localvars = savelocalvars;
519 longjmp(handler->loc, 1);
525 * Compute the names of the files in a redirection list.
529 expredir(union node *n)
533 for (redir = n ; redir ; redir = redir->nfile.next) {
536 switch (redir->type) {
542 expandarg(redir->nfile.fname, &fn, EXP_TILDE);
543 redir->nfile.expfname = fn.list->text;
547 if (redir->ndup.vname) {
548 expandarg(redir->ndup.vname, &fn, EXP_TILDE);
549 fixredir(redir, fn.list->text, 1);
562 * Evaluate a pipeline. All the processes in the pipeline are children
563 * of the process creating the pipeline. (This differs from some versions
564 * of the shell, which make the last process in a pipeline the parent
569 evalpipe(union node *n)
577 TRACE(("evalpipe(%p) called\n", (void *)n));
579 for (lp = n->npipe.cmdlist ; lp ; lp = lp->next)
582 jp = makejob(n, pipelen);
584 for (lp = n->npipe.cmdlist ; lp ; lp = lp->next) {
591 error("Pipe call failed: %s", strerror(errno));
594 if (forkshell(jp, lp->n, n->npipe.backgnd) == 0) {
601 if (!(prevfd >= 0 && pip[0] == 0))
608 evaltree(lp->n, EV_EXIT);
617 if (n->npipe.backgnd == 0) {
619 exitstatus = waitforjob(jp, (int *)NULL);
620 TRACE(("evalpipe: job done exit status %d\n", exitstatus));
629 is_valid_fast_cmdsubst(union node *n)
632 return (n->type == NCMD);
636 * Execute a command inside back quotes. If it's a builtin command, we
637 * want to save its output in a block obtained from malloc. Otherwise
638 * we fork off a subprocess and get the output of the command via a pipe.
639 * Should be called with interrupts off.
643 evalbackcmd(union node *n, struct backcmd *result)
647 struct stackmark smark;
648 struct jmploc jmploc;
649 struct jmploc *savehandler;
650 struct localvar *savelocalvars;
660 setstackmark(&smark);
661 exitstatus = oexitstatus;
662 if (is_valid_fast_cmdsubst(n)) {
663 savelocalvars = localvars;
666 savehandler = handler;
667 if (setjmp(jmploc.loc)) {
668 if (exception == EXERROR || exception == EXEXEC)
670 else if (exception != 0) {
671 handler = savehandler;
674 localvars = savelocalvars;
675 longjmp(handler->loc, 1);
679 evalcommand(n, EV_BACKCMD, result);
681 handler = savehandler;
684 localvars = savelocalvars;
687 error("Pipe call failed: %s", strerror(errno));
689 if (forkshell(jp, n, FORK_NOJOB) == 0) {
696 evaltree(n, EV_EXIT);
702 popstackmark(&smark);
703 TRACE(("evalbackcmd done: fd=%d buf=%p nleft=%d jp=%p\n",
704 result->fd, result->buf, result->nleft, result->jp));
708 mustexpandto(const char *argtext, const char *mask)
711 if (*argtext == CTLQUOTEMARK || *argtext == CTLQUOTEEND) {
715 if (*argtext == CTLESC)
717 else if (BASESYNTAX[(int)*argtext] == CCTL)
719 if (*argtext != *mask)
721 if (*argtext == '\0')
729 isdeclarationcmd(struct narg *arg)
731 int have_command = 0;
735 while (mustexpandto(arg->text, "command")) {
737 arg = &arg->next->narg;
741 * To also allow "command -p" and "command --" as part of
742 * a declaration command, add code here.
743 * We do not do this, as ksh does not do it either and it
744 * is not required by POSIX.
747 return (mustexpandto(arg->text, "export") ||
748 mustexpandto(arg->text, "readonly") ||
749 (mustexpandto(arg->text, "local") &&
750 (have_command || !isfunc("local"))));
754 xtracecommand(struct arglist *varlist, struct arglist *arglist)
760 ps4 = expandstr(ps4val());
761 out2str(ps4 != NULL ? ps4 : ps4val());
762 for (sp = varlist->list ; sp ; sp = sp->next) {
765 p = strchr(sp->text, '=');
768 outbin(sp->text, p - sp->text, out2);
774 for (sp = arglist->list ; sp ; sp = sp->next) {
785 * Check if a builtin can safely be executed in the same process,
786 * even though it should be in a subshell (command substitution).
787 * Note that jobid, jobs, times and trap can show information not
788 * available in a child process; this is deliberate.
789 * The arguments should already have been expanded.
792 safe_builtin(int idx, int argc, char **argv)
794 if (idx == BLTINCMD || idx == COMMANDCMD || idx == ECHOCMD ||
795 idx == FALSECMD || idx == JOBIDCMD || idx == JOBSCMD ||
796 idx == KILLCMD || idx == PRINTFCMD || idx == PWDCMD ||
797 idx == TESTCMD || idx == TIMESCMD || idx == TRUECMD ||
800 if (idx == EXPORTCMD || idx == TRAPCMD || idx == ULIMITCMD ||
802 return (argc <= 1 || (argc == 2 && argv[1][0] == '-'));
804 return (argc <= 1 || (argc == 2 && (argv[1][0] == '-' ||
805 argv[1][0] == '+') && argv[1][1] == 'o' &&
806 argv[1][2] == '\0'));
811 * Execute a simple command.
812 * Note: This may or may not return if (flags & EV_EXIT).
816 evalcommand(union node *cmd, int flags, struct backcmd *backcmd)
819 struct arglist arglist;
820 struct arglist varlist;
828 struct cmdentry cmdentry;
830 struct jmploc jmploc;
831 struct jmploc *savehandler;
833 struct shparam saveparam;
834 struct localvar *savelocalvars;
835 struct parsefile *savetopfile;
839 int do_clearcmdentry;
840 const char *path = pathval();
842 /* First expand the arguments. */
843 TRACE(("evalcommand(%p, %d) called\n", (void *)cmd, flags));
844 arglist.lastp = &arglist.list;
845 varlist.lastp = &varlist.list;
848 do_clearcmdentry = 0;
849 oexitstatus = exitstatus;
851 for (argp = cmd->ncmd.args ; argp ; argp = argp->narg.next) {
852 if (varflag && isassignment(argp->narg.text)) {
853 expandarg(argp, varflag == 1 ? &varlist : &arglist,
856 } else if (varflag == 1)
857 varflag = isdeclarationcmd(&argp->narg) ? 2 : 0;
858 expandarg(argp, &arglist, EXP_FULL | EXP_TILDE);
860 *arglist.lastp = NULL;
861 *varlist.lastp = NULL;
862 expredir(cmd->ncmd.redirect);
864 for (sp = arglist.list ; sp ; sp = sp->next)
866 /* Add one slot at the beginning for tryexec(). */
867 argv = stalloc(sizeof (char *) * (argc + 2));
870 for (sp = arglist.list ; sp ; sp = sp->next) {
871 TRACE(("evalcommand arg: %s\n", sp->text));
876 if (iflag && funcnest == 0 && argc > 0)
880 /* Print the command if xflag is set. */
882 xtracecommand(&varlist, &arglist);
884 /* Now locate the command. */
886 /* Variable assignment(s) without command */
887 cmdentry.cmdtype = CMDBUILTIN;
888 cmdentry.u.index = BLTINCMD;
889 cmdentry.special = 0;
891 static const char PATH[] = "PATH=";
892 int cmd_flags = 0, bltinonly = 0;
895 * Modify the command lookup path, if a PATH= assignment
898 for (sp = varlist.list ; sp ; sp = sp->next)
899 if (strncmp(sp->text, PATH, sizeof(PATH) - 1) == 0) {
900 path = sp->text + sizeof(PATH) - 1;
902 * On `PATH=... command`, we need to make
903 * sure that the command isn't using the
904 * non-updated hash table of the outer PATH
905 * setting and we need to make sure that
906 * the hash table isn't filled with items
907 * from the temporary setting.
909 * It would be better to forbit using and
910 * updating the table while this command
911 * runs, by the command finding mechanism
912 * is heavily integrated with hash handling,
913 * so we just delete the hash before and after
914 * the command runs. Partly deleting like
915 * changepatch() does doesn't seem worth the
916 * bookinging effort, since most such runs add
917 * directories in front of the new PATH.
920 do_clearcmdentry = 1;
925 cmdentry.u.index = find_builtin(*argv, &cmdentry.special);
926 if (cmdentry.u.index < 0) {
927 cmdentry.u.index = BLTINCMD;
933 find_command(argv[0], &cmdentry, cmd_flags, path);
934 /* implement the bltin and command builtins here */
935 if (cmdentry.cmdtype != CMDBUILTIN)
937 if (cmdentry.u.index == BLTINCMD) {
943 } else if (cmdentry.u.index == COMMANDCMD) {
946 if (!strcmp(argv[1], "-p")) {
949 if (argv[2][0] == '-') {
950 if (strcmp(argv[2], "--"))
960 path = _PATH_STDPATH;
962 do_clearcmdentry = 1;
963 } else if (!strcmp(argv[1], "--")) {
968 } else if (argv[1][0] == '-')
974 cmd_flags |= DO_NOFUNC;
980 * Special builtins lose their special properties when
981 * called via 'command'.
983 if (cmd_flags & DO_NOFUNC)
984 cmdentry.special = 0;
987 /* Fork off a child process if necessary. */
988 if (((cmdentry.cmdtype == CMDNORMAL || cmdentry.cmdtype == CMDUNKNOWN)
989 && ((flags & EV_EXIT) == 0 || have_traps()))
990 || ((flags & EV_BACKCMD) != 0
991 && (cmdentry.cmdtype != CMDBUILTIN ||
992 !safe_builtin(cmdentry.u.index, argc, argv)))) {
993 jp = makejob(cmd, 1);
995 if (flags & EV_BACKCMD) {
998 error("Pipe call failed: %s", strerror(errno));
1000 if (cmdentry.cmdtype == CMDNORMAL &&
1001 cmd->ncmd.redirect == NULL &&
1002 varlist.list == NULL &&
1003 (mode == FORK_FG || mode == FORK_NOJOB) &&
1004 !disvforkset() && !iflag && !mflag) {
1005 vforkexecshell(jp, argv, environment(), path,
1006 cmdentry.u.index, flags & EV_BACKCMD ? pip : NULL);
1009 if (forkshell(jp, cmd, mode) != 0)
1010 goto parent; /* at end of routine */
1011 if (flags & EV_BACKCMD) {
1018 flags &= ~EV_BACKCMD;
1023 /* This is the child process if a fork occurred. */
1024 /* Execute the command. */
1025 if (cmdentry.cmdtype == CMDFUNCTION) {
1027 trputs("Shell function: "); trargs(argv);
1029 saveparam = shellparam;
1030 shellparam.malloc = 0;
1031 shellparam.reset = 1;
1032 shellparam.nparam = argc - 1;
1033 shellparam.p = argv + 1;
1034 shellparam.optp = NULL;
1035 shellparam.optnext = NULL;
1037 savelocalvars = localvars;
1039 reffunc(cmdentry.u.func);
1040 savehandler = handler;
1041 if (setjmp(jmploc.loc)) {
1042 freeparam(&shellparam);
1043 shellparam = saveparam;
1045 unreffunc(cmdentry.u.func);
1047 localvars = savelocalvars;
1049 handler = savehandler;
1050 longjmp(handler->loc, 1);
1054 redirect(cmd->ncmd.redirect, REDIR_PUSH);
1056 for (sp = varlist.list ; sp ; sp = sp->next)
1058 exitstatus = oexitstatus;
1059 evaltree(getfuncnode(cmdentry.u.func),
1060 flags & (EV_TESTED | EV_EXIT));
1062 unreffunc(cmdentry.u.func);
1064 localvars = savelocalvars;
1065 freeparam(&shellparam);
1066 shellparam = saveparam;
1067 handler = savehandler;
1071 if (evalskip == SKIPRETURN) {
1076 exitshell(exitstatus);
1077 } else if (cmdentry.cmdtype == CMDBUILTIN) {
1079 trputs("builtin command: "); trargs(argv);
1081 mode = (cmdentry.u.index == EXECCMD)? 0 : REDIR_PUSH;
1082 if (flags == EV_BACKCMD) {
1084 memout.nextc = memout.buf;
1085 memout.bufsize = 64;
1086 mode |= REDIR_BACKQ;
1088 savecmdname = commandname;
1089 savetopfile = getcurrentfile();
1090 cmdenviron = varlist.list;
1092 savehandler = handler;
1093 if (setjmp(jmploc.loc)) {
1096 exitstatus = SIGINT+128;
1097 else if (e != EXEXIT)
1102 redirect(cmd->ncmd.redirect, mode);
1103 outclearerror(out1);
1105 * If there is no command word, redirection errors should
1106 * not be fatal but assignment errors should.
1109 cmdentry.special = 1;
1110 listsetvar(cmdenviron, cmdentry.special ? 0 : VNOSET);
1113 commandname = argv[0];
1115 nextopt_optptr = NULL; /* initialize nextopt */
1116 builtin_flags = flags;
1117 exitstatus = (*builtinfunc[cmdentry.u.index])(argc, argv);
1119 if (outiserror(out1)) {
1120 warning("write error on stdout");
1121 if (exitstatus == 0 || exitstatus == 1)
1131 handler = savehandler;
1132 commandname = savecmdname;
1134 exitshell(exitstatus);
1135 if (flags == EV_BACKCMD) {
1136 backcmd->buf = memout.buf;
1137 backcmd->nleft = memout.nextc - memout.buf;
1140 if (cmdentry.u.index != EXECCMD)
1143 if ((e != EXERROR && e != EXEXEC)
1144 || cmdentry.special)
1146 popfilesupto(savetopfile);
1147 if (flags != EV_BACKCMD)
1152 trputs("normal command: "); trargs(argv);
1154 redirect(cmd->ncmd.redirect, 0);
1155 for (sp = varlist.list ; sp ; sp = sp->next)
1156 setvareq(sp->text, VEXPORT|VSTACK);
1157 envp = environment();
1158 shellexec(argv, envp, path, cmdentry.u.index);
1163 parent: /* parent process gets here (if we forked) */
1164 if (mode == FORK_FG) { /* argument to fork */
1166 exitstatus = waitforjob(jp, &realstatus);
1168 if (iflag && loopnest > 0 && WIFSIGNALED(realstatus)) {
1169 evalskip = SKIPBREAK;
1170 skipcount = loopnest;
1172 } else if (mode == FORK_NOJOB) {
1173 backcmd->fd = pip[0];
1180 setvar("_", lastarg, 0);
1181 if (do_clearcmdentry)
1188 * Search for a command. This is called before we fork so that the
1189 * location of the command will be available in the parent as well as
1190 * the child. The check for "goodname" is an overly conservative
1191 * check that the name will not be subject to expansion.
1195 prehash(union node *n)
1197 struct cmdentry entry;
1199 if (n && n->type == NCMD && n->ncmd.args)
1200 if (goodname(n->ncmd.args->narg.text))
1201 find_command(n->ncmd.args->narg.text, &entry, 0,
1208 * Builtin commands. Builtin commands whose functions are closely
1209 * tied to evaluation are implemented here.
1213 * No command given, a bltin command with no arguments, or a bltin command
1214 * with an invalid name.
1218 bltincmd(int argc, char **argv)
1221 out2fmt_flush("%s: not found\n", argv[1]);
1225 * Preserve exitstatus of a previous possible redirection
1233 * Handle break and continue commands. Break, continue, and return are
1234 * all handled by setting the evalskip flag. The evaluation routines
1235 * above all check this flag, and if it is set they start skipping
1236 * commands rather than executing them. The variable skipcount is
1237 * the number of loops to break/continue, or the number of function
1238 * levels to return. (The latter is always 1.) It should probably
1239 * be an error to break out of more loops than exist, but it isn't
1240 * in the standard shell so we don't make it one here.
1244 breakcmd(int argc, char **argv)
1250 /* Allow arbitrarily large numbers. */
1251 n = strtol(argv[1], &end, 10);
1252 if (!is_digit(argv[1][0]) || *end != '\0')
1253 error("Illegal number: %s", argv[1]);
1259 evalskip = (**argv == 'c')? SKIPCONT : SKIPBREAK;
1266 * The `command' command.
1269 commandcmd(int argc __unused, char **argv __unused)
1275 path = bltinlookup("PATH", 1);
1277 while ((ch = nextopt("pvV")) != '\0') {
1280 path = _PATH_STDPATH;
1283 cmd = TYPECMD_SMALLV;
1292 if (*argptr == NULL || argptr[1] != NULL)
1293 error("wrong number of arguments");
1294 return typecmd_impl(2, argptr - 1, cmd, path);
1296 if (*argptr != NULL)
1297 error("commandcmd bad call");
1300 * Do nothing successfully if no command was specified;
1301 * ksh also does this.
1308 * The return command.
1312 returncmd(int argc, char **argv)
1314 int ret = argc > 1 ? number(argv[1]) : oexitstatus;
1316 evalskip = SKIPRETURN;
1323 falsecmd(int argc __unused, char **argv __unused)
1330 truecmd(int argc __unused, char **argv __unused)
1337 execcmd(int argc, char **argv)
1340 * Because we have historically not supported any options,
1341 * only treat "--" specially.
1343 if (argc > 1 && strcmp(argv[1], "--") == 0)
1348 iflag = 0; /* exit on error */
1351 for (sp = cmdenviron; sp ; sp = sp->next)
1352 setvareq(sp->text, VEXPORT|VSTACK);
1353 shellexec(argv + 1, environment(), pathval(), 0);
1361 timescmd(int argc __unused, char **argv __unused)
1364 long shumins, shsmins, chumins, chsmins;
1365 double shusecs, shssecs, chusecs, chssecs;
1367 if (getrusage(RUSAGE_SELF, &ru) < 0)
1369 shumins = ru.ru_utime.tv_sec / 60;
1370 shusecs = ru.ru_utime.tv_sec % 60 + ru.ru_utime.tv_usec / 1000000.;
1371 shsmins = ru.ru_stime.tv_sec / 60;
1372 shssecs = ru.ru_stime.tv_sec % 60 + ru.ru_stime.tv_usec / 1000000.;
1373 if (getrusage(RUSAGE_CHILDREN, &ru) < 0)
1375 chumins = ru.ru_utime.tv_sec / 60;
1376 chusecs = ru.ru_utime.tv_sec % 60 + ru.ru_utime.tv_usec / 1000000.;
1377 chsmins = ru.ru_stime.tv_sec / 60;
1378 chssecs = ru.ru_stime.tv_sec % 60 + ru.ru_stime.tv_usec / 1000000.;
1379 out1fmt("%ldm%.3fs %ldm%.3fs\n%ldm%.3fs %ldm%.3fs\n", shumins,
1380 shusecs, shsmins, shssecs, chumins, chusecs, chsmins, chssecs);