/* $Header: /p/tcsh/cvsroot/tcsh/tc.func.c,v 3.139 2009/06/25 21:15:38 christos Exp $ */ /* * tc.func.c: New tcsh builtins. */ /*- * Copyright (c) 1980, 1991 The Regents of the University of California. * All rights reserved. * * 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 "sh.h" RCSID("$tcsh: tc.func.c,v 3.139 2009/06/25 21:15:38 christos Exp $") #include "ed.h" #include "ed.defns.h" /* for the function names */ #include "tw.h" #include "tc.h" #ifdef WINNT_NATIVE #include "nt.const.h" #else /* WINNT_NATIVE */ #include #endif /* WINNT_NATIVE */ #ifdef AFS #include #include long ka_UserAuthenticateGeneral(); #endif /* AFS */ #ifdef TESLA extern int do_logout; #endif /* TESLA */ extern time_t t_period; extern int just_signaled; static int precmd_active = 0; static int jobcmd_active = 0; /* GrP */ static int postcmd_active = 0; static int periodic_active = 0; static int cwdcmd_active = 0; /* PWP: for cwd_cmd */ static int beepcmd_active = 0; static void (*alm_fun)(void) = NULL; static void auto_logout (void); static char *xgetpass (const char *); static void auto_lock (void); #ifdef BSDJOBS static void insert (struct wordent *, int); static void insert_we (struct wordent *, struct wordent *); static int inlist (Char *, Char *); #endif /* BSDJOBS */ static int tildecompare (const void *, const void *); static Char *gethomedir (const Char *); #ifdef REMOTEHOST static void palarm (int); static void getremotehost (int); #endif /* REMOTEHOST */ /* * Tops-C shell */ /* * expand_lex: Take the given lex and return an expanded version of it. * First guy in lex list is ignored; last guy is ^J which we ignore. * Only take lex'es from position 'from' to position 'to' inclusive * * Note: csh sometimes sets bit 8 in characters which causes all kinds * of problems if we don't mask it here. Note: excl's in lexes have been * un-back-slashed and must be re-back-slashed * */ /* PWP: this is a combination of the old sprlex() and the expand_lex from the magic-space stuff */ Char * expand_lex(const struct wordent *sp0, int from, int to) { struct Strbuf buf = Strbuf_INIT; const struct wordent *sp; Char *s; Char prev_c; int i; prev_c = '\0'; if (!sp0 || (sp = sp0->next) == sp0 || sp == (sp0 = sp0->prev)) return Strbuf_finish(&buf); /* null lex */ for (i = 0; ; i++) { if ((i >= from) && (i <= to)) { /* if in range */ for (s = sp->word; *s; s++) { /* * bugfix by Michael Bloom: anything but the current history * character {(PWP) and backslash} seem to be dealt with * elsewhere. */ if ((*s & QUOTE) && (((*s & TRIM) == HIST) || (((*s & TRIM) == '\'') && (prev_c != '\\')) || (((*s & TRIM) == '\"') && (prev_c != '\\')) || (((*s & TRIM) == '\\') && (prev_c != '\\')))) { Strbuf_append1(&buf, '\\'); } Strbuf_append1(&buf, *s & TRIM); prev_c = *s; } Strbuf_append1(&buf, ' '); } sp = sp->next; if (sp == sp0) break; } if (buf.len != 0) buf.len--; /* get rid of trailing space */ return Strbuf_finish(&buf); } Char * sprlex(const struct wordent *sp0) { return expand_lex(sp0, 0, INT_MAX); } Char * Itoa(int n, size_t min_digits, Char attributes) { /* * The array size here is derived from * log8(UINT_MAX) * which is guaranteed to be enough for a decimal * representation. We add 1 because integer divide * rounds down. */ #ifndef CHAR_BIT # define CHAR_BIT 8 #endif Char buf[CHAR_BIT * sizeof(int) / 3 + 1], *res, *p, *s; unsigned int un; /* handle most negative # too */ int pad = (min_digits != 0); if (sizeof(buf) - 1 < min_digits) min_digits = sizeof(buf) - 1; un = n; if (n < 0) un = -n; p = buf; do { *p++ = un % 10 + '0'; un /= 10; } while ((pad && --min_digits > 0) || un != 0); res = xmalloc((p - buf + 2) * sizeof(*res)); s = res; if (n < 0) *s++ = '-'; while (p > buf) *s++ = *--p | attributes; *s = '\0'; return res; } /*ARGSUSED*/ void dolist(Char **v, struct command *c) { Char **globbed; int i, k; struct stat st; USE(c); if (*++v == NULL) { struct Strbuf word = Strbuf_INIT; Strbuf_terminate(&word); cleanup_push(&word, Strbuf_cleanup); (void) t_search(&word, LIST, TW_ZERO, 0, STRNULL, 0); cleanup_until(&word); return; } v = glob_all_or_error(v); globbed = v; cleanup_push(globbed, blk_cleanup); for (k = 0; v[k] != NULL && v[k][0] != '-'; k++) continue; if (v[k]) { /* * We cannot process a flag therefore we let ls do it right. */ Char *lspath; struct command *t; struct wordent cmd, *nextword, *lastword; Char *cp; struct varent *vp; if (setintr) { pintr_disabled++; cleanup_push(&pintr_disabled, disabled_cleanup); } if (seterr) { xfree(seterr); seterr = NULL; } lspath = STRls; STRmCF[1] = 'C'; STRmCF[3] = '\0'; /* Look at listflags, to add -A to the flags, to get a path of ls if necessary */ if ((vp = adrof(STRlistflags)) != NULL && vp->vec != NULL && vp->vec[0] != STRNULL) { if (vp->vec[1] != NULL && vp->vec[1][0] != '\0') lspath = vp->vec[1]; for (cp = vp->vec[0]; *cp; cp++) switch (*cp) { case 'x': STRmCF[1] = 'x'; break; case 'a': STRmCF[3] = 'a'; break; case 'A': STRmCF[3] = 'A'; break; default: break; } } cmd.word = STRNULL; lastword = &cmd; nextword = xcalloc(1, sizeof cmd); nextword->word = Strsave(lspath); lastword->next = nextword; nextword->prev = lastword; lastword = nextword; nextword = xcalloc(1, sizeof cmd); nextword->word = Strsave(STRmCF); lastword->next = nextword; nextword->prev = lastword; #if defined(KANJI) && defined(SHORT_STRINGS) && defined(DSPMBYTE) if (dspmbyte_ls) { lastword = nextword; nextword = xcalloc(1, sizeof cmd); nextword->word = Strsave(STRmmliteral); lastword->next = nextword; nextword->prev = lastword; } #endif #ifdef COLOR_LS_F if (color_context_ls) { lastword = nextword; nextword = xcalloc(1, sizeof cmd); nextword->word = Strsave(STRmmcolormauto); lastword->next = nextword; nextword->prev = lastword; } #endif /* COLOR_LS_F */ lastword = nextword; for (cp = *v; cp; cp = *++v) { nextword = xcalloc(1, sizeof cmd); nextword->word = quote(Strsave(cp)); lastword->next = nextword; nextword->prev = lastword; lastword = nextword; } lastword->next = &cmd; cmd.prev = lastword; cleanup_push(&cmd, lex_cleanup); /* build a syntax tree for the command. */ t = syntax(cmd.next, &cmd, 0); cleanup_push(t, syntax_cleanup); if (seterr) stderror(ERR_OLD); /* expand aliases like process() does */ /* alias(&cmd); */ /* execute the parse tree. */ execute(t, tpgrp > 0 ? tpgrp : -1, NULL, NULL, FALSE); /* done. free the lex list and parse tree. */ cleanup_until(&cmd); if (setintr) cleanup_until(&pintr_disabled); } else { Char *dp, *tmp; struct Strbuf buf = Strbuf_INIT; cleanup_push(&buf, Strbuf_cleanup); for (k = 0, i = 0; v[k] != NULL; k++) { tmp = dnormalize(v[k], symlinks == SYM_IGNORE); cleanup_push(tmp, xfree); dp = Strend(tmp) - 1; if (*dp == '/' && dp != tmp) #ifdef apollo if (dp != &tmp[1]) #endif /* apollo */ *dp = '\0'; if (stat(short2str(tmp), &st) == -1) { int err; err = errno; if (k != i) { if (i != 0) xputchar('\n'); print_by_column(STRNULL, &v[i], k - i, FALSE); } xprintf("%S: %s.\n", tmp, strerror(err)); i = k + 1; } else if (S_ISDIR(st.st_mode)) { Char *cp; if (k != i) { if (i != 0) xputchar('\n'); print_by_column(STRNULL, &v[i], k - i, FALSE); } if (k != 0 && v[1] != NULL) xputchar('\n'); xprintf("%S:\n", tmp); buf.len = 0; for (cp = tmp; *cp; cp++) Strbuf_append1(&buf, (*cp | QUOTE)); Strbuf_terminate(&buf); dp = &buf.s[buf.len - 1]; if ( #ifdef WINNT_NATIVE (*dp != (Char) (':' | QUOTE)) && #endif /* WINNT_NATIVE */ (*dp != (Char) ('/' | QUOTE))) { Strbuf_append1(&buf, '/'); Strbuf_terminate(&buf); } else *dp &= TRIM; (void) t_search(&buf, LIST, TW_ZERO, 0, STRNULL, 0); i = k + 1; } cleanup_until(tmp); } cleanup_until(&buf); if (k != i) { if (i != 0) xputchar('\n'); print_by_column(STRNULL, &v[i], k - i, FALSE); } } cleanup_until(globbed); } extern int GotTermCaps; /*ARGSUSED*/ void dotelltc(Char **v, struct command *c) { USE(v); USE(c); if (!GotTermCaps) GetTermCaps(); TellTC(); } /*ARGSUSED*/ void doechotc(Char **v, struct command *c) { USE(c); if (!GotTermCaps) GetTermCaps(); EchoTC(++v); } /*ARGSUSED*/ void dosettc(Char **v, struct command *c) { char *tv[2]; USE(c); if (!GotTermCaps) GetTermCaps(); tv[0] = strsave(short2str(v[1])); cleanup_push(tv[0], xfree); tv[1] = strsave(short2str(v[2])); cleanup_push(tv[1], xfree); SetTC(tv[0], tv[1]); cleanup_until(tv[0]); } /* The dowhich() is by: * Andreas Luik * I S A GmbH - Informationssysteme fuer computerintegrierte Automatisierung * Azenberstr. 35 * D-7000 Stuttgart 1 * West-Germany * Thanks!! */ int cmd_expand(Char *cmd, Char **str) { struct wordent lexp[3]; struct varent *vp; int rv = TRUE; lexp[0].next = &lexp[1]; lexp[1].next = &lexp[2]; lexp[2].next = &lexp[0]; lexp[0].prev = &lexp[2]; lexp[1].prev = &lexp[0]; lexp[2].prev = &lexp[1]; lexp[0].word = STRNULL; lexp[2].word = STRret; if ((vp = adrof1(cmd, &aliases)) != NULL && vp->vec != NULL) { if (str == NULL) { xprintf(CGETS(22, 1, "%S: \t aliased to "), cmd); blkpr(vp->vec); xputchar('\n'); } else *str = blkexpand(vp->vec); } else { lexp[1].word = cmd; rv = tellmewhat(lexp, str); } return rv; } /*ARGSUSED*/ void dowhich(Char **v, struct command *c) { int rv = TRUE; USE(c); /* * We don't want to glob dowhich args because we lose quoteing * E.g. which \ls if ls is aliased will not work correctly if * we glob here. */ while (*++v) rv &= cmd_expand(*v, NULL); if (!rv) setcopy(STRstatus, STR1, VAR_READWRITE); } /* PWP: a hack to start up your stopped editor on a single keystroke */ /* jbs - fixed hack so it worked :-) 3/28/89 */ struct process * find_stop_ed(void) { struct process *pp, *retp; const char *ep, *vp; char *cp, *p; size_t epl, vpl; int pstatus; if ((ep = getenv("EDITOR")) != NULL) { /* if we have a value */ if ((p = strrchr(ep, '/')) != NULL) /* if it has a path */ ep = p + 1; /* then we want only the last part */ } else ep = "ed"; if ((vp = getenv("VISUAL")) != NULL) { /* if we have a value */ if ((p = strrchr(vp, '/')) != NULL) /* and it has a path */ vp = p + 1; /* then we want only the last part */ } else vp = "vi"; for (vpl = 0; vp[vpl] && !isspace((unsigned char)vp[vpl]); vpl++) continue; for (epl = 0; ep[epl] && !isspace((unsigned char)ep[epl]); epl++) continue; if (pcurrent == NULL) /* see if we have any jobs */ return NULL; /* nope */ retp = NULL; for (pp = proclist.p_next; pp; pp = pp->p_next) if (pp->p_procid == pp->p_jobid) { /* * Only foreground an edit session if it is suspended. Some GUI * editors have may be happily running in a separate window, no * point in foregrounding these if they're already running - webb */ pstatus = (int) (pp->p_flags & PALLSTATES); if (pstatus != PINTERRUPTED && pstatus != PSTOPPED && pstatus != PSIGNALED) continue; p = short2str(pp->p_command); /* get the first word */ for (cp = p; *cp && !isspace((unsigned char) *cp); cp++) continue; *cp = '\0'; if ((cp = strrchr(p, '/')) != NULL) /* and it has a path */ cp = cp + 1; /* then we want only the last part */ else cp = p; /* else we get all of it */ /* if we find either in the current name, fg it */ if (strncmp(ep, cp, epl) == 0 || strncmp(vp, cp, vpl) == 0) { /* * If there is a choice, then choose the current process if * available, or the previous process otherwise, or else * anything will do - Robert Webb (robertw@mulga.cs.mu.oz.au). */ if (pp == pcurrent) return pp; else if (retp == NULL || pp == pprevious) retp = pp; } } return retp; /* Will be NULL if we didn't find a job */ } void fg_proc_entry(struct process *pp) { jmp_buf_t osetexit; int ohaderr; Char oGettingInput; size_t omark; getexit(osetexit); pintr_disabled++; oGettingInput = GettingInput; GettingInput = 0; ohaderr = haderr; /* we need to ignore setting of haderr due to * process getting stopped by a signal */ omark = cleanup_push_mark(); if (setexit() == 0) { /* come back here after pjwait */ pendjob(); (void) alarm(0); /* No autologout */ alrmcatch_disabled = 1; if (!pstart(pp, 1)) { pp->p_procid = 0; stderror(ERR_BADJOB, pp->p_command, strerror(errno)); } pjwait(pp); } setalarm(1); /* Autologout back on */ cleanup_pop_mark(omark); resexit(osetexit); haderr = ohaderr; GettingInput = oGettingInput; disabled_cleanup(&pintr_disabled); } static char * xgetpass(const char *prm) { static struct strbuf pass; /* = strbuf_INIT; */ int fd; sigset_t oset, set; struct sigaction sa, osa; sa.sa_handler = SIG_IGN; sigemptyset(&sa.sa_mask); sa.sa_flags = 0; (void)sigaction(SIGINT, &sa, &osa); sigemptyset(&set); sigaddset(&set, SIGINT); (void)sigprocmask(SIG_UNBLOCK, &set, &oset); cleanup_push(&osa, sigint_cleanup); cleanup_push(&oset, sigprocmask_cleanup); (void) Rawmode(); /* Make sure, cause we want echo off */ fd = xopen("/dev/tty", O_RDWR|O_LARGEFILE); if (fd == -1) fd = SHIN; else cleanup_push(&fd, open_cleanup); xprintf("%s", prm); flush(); pass.len = 0; for (;;) { char c; if (xread(fd, &c, 1) < 1 || c == '\n') break; strbuf_append1(&pass, c); } strbuf_terminate(&pass); cleanup_until(&osa); return pass.s; } #ifndef NO_CRYPT #if !HAVE_DECL_CRYPT extern char *crypt (); #endif #ifdef HAVE_CRYPT_H #include #endif #endif /* * Ask the user for his login password to continue working * On systems that have a shadow password, this will only * work for root, but what can we do? * * If we fail to get the password, then we log the user out * immediately */ /*ARGSUSED*/ static void auto_lock(void) { #ifndef NO_CRYPT int i; char *srpp = NULL; struct passwd *pw; #undef XCRYPT #if defined(HAVE_AUTH_H) && defined(HAVE_GETAUTHUID) struct authorization *apw; extern char *crypt16 (const char *, const char *); # define XCRYPT(a, b) crypt16(a, b) if ((pw = xgetpwuid(euid)) != NULL && /* effective user passwd */ (apw = getauthuid(euid)) != NULL) /* enhanced ultrix passwd */ srpp = apw->a_password; #elif defined(HAVE_SHADOW_H) struct spwd *spw; # define XCRYPT(a, b) crypt(a, b) if ((pw = xgetpwuid(euid)) != NULL) { /* effective user passwd */ errno = 0; while ((spw = getspnam(pw->pw_name)) == NULL && errno == EINTR) { handle_pending_signals(); errno = 0; } if (spw != NULL) /* shadowed passwd */ srpp = spw->sp_pwdp; } #else #define XCRYPT(a, b) crypt(a, b) #if !defined(__MVS__) if ((pw = xgetpwuid(euid)) != NULL) /* effective user passwd */ srpp = pw->pw_passwd; #endif /* !MVS */ #endif if (srpp == NULL) { auto_logout(); /*NOTREACHED*/ return; } setalarm(0); /* Not for locking any more */ xputchar('\n'); for (i = 0; i < 5; i++) { const char *crpp; char *pp; #ifdef AFS char *afsname; Char *safs; if ((safs = varval(STRafsuser)) != STRNULL) afsname = short2str(safs); else if ((afsname = getenv("AFSUSER")) == NULL) afsname = pw->pw_name; #endif pp = xgetpass("Password:"); crpp = XCRYPT(pp, srpp); if ((strcmp(crpp, srpp) == 0) #ifdef AFS || (ka_UserAuthenticateGeneral(KA_USERAUTH_VERSION, afsname, /* name */ NULL, /* instance */ NULL, /* realm */ pp, /* password */ 0, /* lifetime */ 0, 0, /* spare */ NULL) /* reason */ == 0) #endif /* AFS */ ) { (void) memset(pp, 0, strlen(pp)); if (GettingInput && !just_signaled) { (void) Rawmode(); ClearLines(); ClearDisp(); Refresh(); } just_signaled = 0; return; } xprintf(CGETS(22, 2, "\nIncorrect passwd for %s\n"), pw->pw_name); } #endif /* NO_CRYPT */ auto_logout(); } static void auto_logout(void) { xprintf("auto-logout\n"); /* Don't leave the tty in raw mode */ if (editing) (void) Cookedmode(); xclose(SHIN); setcopy(STRlogout, STRautomatic, VAR_READWRITE); child = 1; #ifdef TESLA do_logout = 1; #endif /* TESLA */ GettingInput = FALSE; /* make flush() work to write hist files. Huber*/ goodbye(NULL, NULL); } void alrmcatch(void) { (*alm_fun)(); setalarm(1); } /* * Karl Kleinpaste, 21oct1983. * Added precmd(), which checks for the alias * precmd in aliases. If it's there, the alias * is executed as a command. This is done * after mailchk() and just before print- * ing the prompt. Useful for things like printing * one's current directory just before each command. */ void precmd(void) { pintr_disabled++; cleanup_push(&pintr_disabled, disabled_cleanup); if (precmd_active) { /* an error must have been caught */ aliasrun(2, STRunalias, STRprecmd); xprintf("%s", CGETS(22, 3, "Faulty alias 'precmd' removed.\n")); goto leave; } precmd_active = 1; if (!whyles && adrof1(STRprecmd, &aliases)) aliasrun(1, STRprecmd, NULL); leave: precmd_active = 0; cleanup_until(&pintr_disabled); } void postcmd(void) { pintr_disabled++; cleanup_push(&pintr_disabled, disabled_cleanup); if (postcmd_active) { /* an error must have been caught */ aliasrun(2, STRunalias, STRpostcmd); xprintf("%s", CGETS(22, 3, "Faulty alias 'postcmd' removed.\n")); goto leave; } postcmd_active = 1; if (!whyles && adrof1(STRpostcmd, &aliases)) aliasrun(1, STRpostcmd, NULL); leave: postcmd_active = 0; cleanup_until(&pintr_disabled); } /* * Paul Placeway 11/24/87 Added cwd_cmd by hacking precmd() into * submission... Run every time $cwd is set (after it is set). Useful * for putting your machine and cwd (or anything else) in an xterm title * space. */ void cwd_cmd(void) { pintr_disabled++; cleanup_push(&pintr_disabled, disabled_cleanup); if (cwdcmd_active) { /* an error must have been caught */ aliasrun(2, STRunalias, STRcwdcmd); xprintf("%s", CGETS(22, 4, "Faulty alias 'cwdcmd' removed.\n")); goto leave; } cwdcmd_active = 1; if (!whyles && adrof1(STRcwdcmd, &aliases)) aliasrun(1, STRcwdcmd, NULL); leave: cwdcmd_active = 0; cleanup_until(&pintr_disabled); } /* * Joachim Hoenig 07/16/91 Added beep_cmd, run every time tcsh wishes * to beep the terminal bell. Useful for playing nice sounds instead. */ void beep_cmd(void) { pintr_disabled++; cleanup_push(&pintr_disabled, disabled_cleanup); if (beepcmd_active) { /* an error must have been caught */ aliasrun(2, STRunalias, STRbeepcmd); xprintf("%s", CGETS(22, 5, "Faulty alias 'beepcmd' removed.\n")); } else { beepcmd_active = 1; if (!whyles && adrof1(STRbeepcmd, &aliases)) aliasrun(1, STRbeepcmd, NULL); } beepcmd_active = 0; cleanup_until(&pintr_disabled); } /* * Karl Kleinpaste, 18 Jan 1984. * Added period_cmd(), which executes the alias "periodic" every * $tperiod minutes. Useful for occasional checking of msgs and such. */ void period_cmd(void) { Char *vp; time_t t, interval; pintr_disabled++; cleanup_push(&pintr_disabled, disabled_cleanup); if (periodic_active) { /* an error must have been caught */ aliasrun(2, STRunalias, STRperiodic); xprintf("%s", CGETS(22, 6, "Faulty alias 'periodic' removed.\n")); goto leave; } periodic_active = 1; if (!whyles && adrof1(STRperiodic, &aliases)) { vp = varval(STRtperiod); if (vp == STRNULL) { aliasrun(1, STRperiodic, NULL); goto leave; } interval = getn(vp); (void) time(&t); if (t - t_period >= interval * 60) { t_period = t; aliasrun(1, STRperiodic, NULL); } } leave: periodic_active = 0; cleanup_until(&pintr_disabled); } /* * GrP Greg Parker May 2001 * Added job_cmd(), which is run every time a job is started or * foregrounded. The command is passed a single argument, the string * used to start the job originally. With precmd, useful for setting * xterm titles. * Cloned from cwd_cmd(). */ void job_cmd(Char *args) { pintr_disabled++; cleanup_push(&pintr_disabled, disabled_cleanup); if (jobcmd_active) { /* an error must have been caught */ aliasrun(2, STRunalias, STRjobcmd); xprintf("%s", CGETS(22, 14, "Faulty alias 'jobcmd' removed.\n")); goto leave; } jobcmd_active = 1; if (!whyles && adrof1(STRjobcmd, &aliases)) { struct process *pp = pcurrjob; /* put things back after the hook */ aliasrun(2, STRjobcmd, args); pcurrjob = pp; } leave: jobcmd_active = 0; cleanup_until(&pintr_disabled); } /* * Karl Kleinpaste, 21oct1983. * Set up a one-word alias command, for use for special things. * This code is based on the mainline of process(). */ void aliasrun(int cnt, Char *s1, Char *s2) { struct wordent w, *new1, *new2; /* for holding alias name */ struct command *t = NULL; jmp_buf_t osetexit; int status; size_t omark; getexit(osetexit); if (seterr) { xfree(seterr); seterr = NULL; /* don't repeatedly print err msg. */ } w.word = STRNULL; new1 = xcalloc(1, sizeof w); new1->word = Strsave(s1); if (cnt == 1) { /* build a lex list with one word. */ w.next = w.prev = new1; new1->next = new1->prev = &w; } else { /* build a lex list with two words. */ new2 = xcalloc(1, sizeof w); new2->word = Strsave(s2); w.next = new2->prev = new1; new1->next = w.prev = new2; new1->prev = new2->next = &w; } cleanup_push(&w, lex_cleanup); /* Save the old status */ status = getn(varval(STRstatus)); /* expand aliases like process() does. */ alias(&w); /* build a syntax tree for the command. */ t = syntax(w.next, &w, 0); cleanup_push(t, syntax_cleanup); if (seterr) stderror(ERR_OLD); psavejob(); cleanup_push(&cnt, psavejob_cleanup); /* cnt is used only as a marker */ /* catch any errors here */ omark = cleanup_push_mark(); if (setexit() == 0) /* execute the parse tree. */ /* * From: Michael Schroeder * was execute(t, tpgrp); */ execute(t, tpgrp > 0 ? tpgrp : -1, NULL, NULL, TRUE); /* reset the error catcher to the old place */ cleanup_pop_mark(omark); resexit(osetexit); if (haderr) { haderr = 0; /* * Either precmd, or cwdcmd, or periodic had an error. Call it again so * that it is removed */ if (precmd_active) precmd(); if (postcmd_active) postcmd(); #ifdef notdef /* * XXX: On the other hand, just interrupting them causes an error too. * So if we hit ^C in the middle of cwdcmd or periodic the alias gets * removed. We don't want that. Note that we want to remove precmd * though, cause that could lead into an infinite loop. This should be * fixed correctly, but then haderr should give us the whole exit * status not just true or false. */ else if (cwdcmd_active) cwd_cmd(); else if (beepcmd_active) beep_cmd(); else if (periodic_active) period_cmd(); #endif /* notdef */ } cleanup_until(&w); pendjob(); /* Restore status */ setv(STRstatus, putn(status), VAR_READWRITE); } void setalarm(int lck) { struct varent *vp; Char *cp; unsigned alrm_time = 0, logout_time, lock_time; time_t cl, nl, sched_dif; if ((vp = adrof(STRautologout)) != NULL && vp->vec != NULL) { if ((cp = vp->vec[0]) != 0) { if ((logout_time = (unsigned) atoi(short2str(cp)) * 60) > 0) { #ifdef SOLARIS2 /* * Solaris alarm(2) uses a timer based in clock ticks * internally so it multiplies our value with CLK_TCK... * Of course that can overflow leading to unexpected * results, so we clip it here. Grr. Where is that * documented folks? */ if (logout_time >= 0x7fffffff / CLK_TCK) logout_time = 0x7fffffff / CLK_TCK; #endif /* SOLARIS2 */ alrm_time = logout_time; alm_fun = auto_logout; } } if ((cp = vp->vec[1]) != 0) { if ((lock_time = (unsigned) atoi(short2str(cp)) * 60) > 0) { if (lck) { if (alrm_time == 0 || lock_time < alrm_time) { alrm_time = lock_time; alm_fun = auto_lock; } } else /* lock_time always < alrm_time */ if (alrm_time) alrm_time -= lock_time; } } } if ((nl = sched_next()) != -1) { (void) time(&cl); sched_dif = nl > cl ? nl - cl : 0; if ((alrm_time == 0) || ((unsigned) sched_dif < alrm_time)) { alrm_time = ((unsigned) sched_dif) + 1; alm_fun = sched_run; } } alrmcatch_disabled = 0; (void) alarm(alrm_time); /* Autologout ON */ } #undef RMDEBUG /* For now... */ void rmstar(struct wordent *cp) { struct wordent *we, *args; struct wordent *tmp, *del; #ifdef RMDEBUG static Char STRrmdebug[] = {'r', 'm', 'd', 'e', 'b', 'u', 'g', '\0'}; Char *tag; #endif /* RMDEBUG */ Char *charac; char c; int ask, doit, star = 0, silent = 0; if (!adrof(STRrmstar)) return; #ifdef RMDEBUG tag = varval(STRrmdebug); #endif /* RMDEBUG */ we = cp->next; while (*we->word == ';' && we != cp) we = we->next; while (we != cp) { #ifdef RMDEBUG if (*tag) xprintf(CGETS(22, 7, "parsing command line\n")); #endif /* RMDEBUG */ if (!Strcmp(we->word, STRrm)) { args = we->next; ask = (*args->word != '-'); while (*args->word == '-' && !silent) { /* check options */ for (charac = (args->word + 1); *charac && !silent; charac++) silent = (*charac == 'i' || *charac == 'f'); args = args->next; } ask = (ask || (!ask && !silent)); if (ask) { for (; !star && *args->word != ';' && args != cp; args = args->next) if (!Strcmp(args->word, STRstar)) star = 1; if (ask && star) { xprintf("%s", CGETS(22, 8, "Do you really want to delete all files? [n/y] ")); flush(); (void) force_read(SHIN, &c, 1); /* * Perhaps we should use the yesexpr from the * actual locale */ doit = (strchr(CGETS(22, 14, "Yy"), c) != NULL); while (c != '\n' && force_read(SHIN, &c, 1) == 1) continue; if (!doit) { /* remove the command instead */ #ifdef RMDEBUG if (*tag) xprintf(CGETS(22, 9, "skipping deletion of files!\n")); #endif /* RMDEBUG */ for (tmp = we; *tmp->word != '\n' && *tmp->word != ';' && tmp != cp;) { tmp->prev->next = tmp->next; tmp->next->prev = tmp->prev; xfree(tmp->word); del = tmp; tmp = tmp->next; xfree(del); } if (*tmp->word == ';') { tmp->prev->next = tmp->next; tmp->next->prev = tmp->prev; xfree(tmp->word); del = tmp; tmp = tmp->next; xfree(del); } we = tmp; continue; } } } } for (we = we->next; *we->word != ';' && we != cp; we = we->next) continue; if (*we->word == ';') we = we->next; } #ifdef RMDEBUG if (*tag) { xprintf(CGETS(22, 10, "command line now is:\n")); for (we = cp->next; we != cp; we = we->next) xprintf("%S ", we->word); } #endif /* RMDEBUG */ return; } #ifdef BSDJOBS /* Check if command is in continue list and do a "aliasing" if it exists as a job in background */ #undef CNDEBUG /* For now */ void continue_jobs(struct wordent *cp) { struct wordent *we; struct process *pp, *np; Char *cmd, *continue_list, *continue_args_list; #ifdef CNDEBUG Char *tag; static Char STRcndebug[] = {'c', 'n', 'd', 'e', 'b', 'u', 'g', '\0'}; #endif /* CNDEBUG */ int in_cont_list, in_cont_arg_list; #ifdef CNDEBUG tag = varval(STRcndebug); #endif /* CNDEBUG */ continue_list = varval(STRcontinue); continue_args_list = varval(STRcontinue_args); if (*continue_list == '\0' && *continue_args_list == '\0') return; we = cp->next; while (*we->word == ';' && we != cp) we = we->next; while (we != cp) { #ifdef CNDEBUG if (*tag) xprintf(CGETS(22, 11, "parsing command line\n")); #endif /* CNDEBUG */ cmd = we->word; in_cont_list = inlist(continue_list, cmd); in_cont_arg_list = inlist(continue_args_list, cmd); if (in_cont_list || in_cont_arg_list) { #ifdef CNDEBUG if (*tag) xprintf(CGETS(22, 12, "in one of the lists\n")); #endif /* CNDEBUG */ np = NULL; for (pp = proclist.p_next; pp; pp = pp->p_next) { if (prefix(cmd, pp->p_command)) { if (pp->p_index) { np = pp; break; } } } if (np) { insert(we, in_cont_arg_list); } } for (we = we->next; *we->word != ';' && we != cp; we = we->next) continue; if (*we->word == ';') we = we->next; } #ifdef CNDEBUG if (*tag) { xprintf(CGETS(22, 13, "command line now is:\n")); for (we = cp->next; we != cp; we = we->next) xprintf("%S ", we->word); } #endif /* CNDEBUG */ return; } /* The actual "aliasing" of for backgrounds() is done here with the aid of insert_we(). */ static void insert(struct wordent *pl, int file_args) { struct wordent *now, *last; Char *cmd, *bcmd, *cp1, *cp2; size_t cmd_len; Char *upause = STRunderpause; size_t p_len = Strlen(upause); cmd_len = Strlen(pl->word); cmd = xcalloc(1, (cmd_len + 1) * sizeof(Char)); (void) Strcpy(cmd, pl->word); /* Do insertions at beginning, first replace command word */ if (file_args) { now = pl; xfree(now->word); now->word = xcalloc(1, 5 * sizeof(Char)); (void) Strcpy(now->word, STRecho); now = xcalloc(1, sizeof(struct wordent)); now->word = xcalloc(1, 6 * sizeof(Char)); (void) Strcpy(now->word, STRbackqpwd); insert_we(now, pl); for (last = now; *last->word != '\n' && *last->word != ';'; last = last->next) continue; now = xcalloc(1, sizeof(struct wordent)); now->word = xcalloc(1, 2 * sizeof(Char)); (void) Strcpy(now->word, STRgt); insert_we(now, last->prev); now = xcalloc(1, sizeof(struct wordent)); now->word = xcalloc(1, 2 * sizeof(Char)); (void) Strcpy(now->word, STRbang); insert_we(now, last->prev); now = xcalloc(1, sizeof(struct wordent)); now->word = xcalloc(1, (cmd_len + p_len + 4) * sizeof(Char)); cp1 = now->word; cp2 = cmd; *cp1++ = '~'; *cp1++ = '/'; *cp1++ = '.'; while ((*cp1++ = *cp2++) != '\0') continue; cp1--; cp2 = upause; while ((*cp1++ = *cp2++) != '\0') continue; insert_we(now, last->prev); now = xcalloc(1, sizeof(struct wordent)); now->word = xcalloc(1, 2 * sizeof(Char)); (void) Strcpy(now->word, STRsemi); insert_we(now, last->prev); bcmd = xcalloc(1, (cmd_len + 2) * sizeof(Char)); *bcmd = '%'; Strcpy(bcmd + 1, cmd); now = xcalloc(1, sizeof(struct wordent)); now->word = bcmd; insert_we(now, last->prev); } else { struct wordent *del; now = pl; xfree(now->word); now->word = xcalloc(1, (cmd_len + 2) * sizeof(Char)); *now->word = '%'; Strcpy(now->word + 1, cmd); for (now = now->next; *now->word != '\n' && *now->word != ';' && now != pl;) { now->prev->next = now->next; now->next->prev = now->prev; xfree(now->word); del = now; now = now->next; xfree(del); } } } static void insert_we(struct wordent *new, struct wordent *where) { new->prev = where; new->next = where->next; where->next = new; new->next->prev = new; } static int inlist(Char *list, Char *name) { Char *l, *n; l = list; n = name; while (*l && *n) { if (*l == *n) { l++; n++; if (*n == '\0' && (*l == ' ' || *l == '\0')) return (1); else continue; } else { while (*l && *l != ' ') l++; /* skip to blank */ while (*l && *l == ' ') l++; /* and find first nonblank character */ n = name; } } return (0); } #endif /* BSDJOBS */ /* * Implement a small cache for tilde names. This is used primarily * to expand tilde names to directories, but also * we can find users from their home directories for the tilde * prompt, on machines where yp lookup is slow this can be a big win... * As with any cache this can run out of sync, rehash can sync it again. */ static struct tildecache { Char *user; Char *home; size_t hlen; } *tcache = NULL; #define TILINCR 10 size_t tlength = 0; static size_t tsize = TILINCR; static int tildecompare(const void *xp1, const void *xp2) { const struct tildecache *p1, *p2; p1 = xp1; p2 = xp2; return Strcmp(p1->user, p2->user); } static Char * gethomedir(const Char *us) { struct passwd *pp; #ifdef HESIOD char **res, **res1, *cp; Char *rp; #endif /* HESIOD */ pp = xgetpwnam(short2str(us)); #ifdef YPBUGS fix_yp_bugs(); #endif /* YPBUGS */ if (pp != NULL) { #if 0 /* Don't return if root */ if (pp->pw_dir[0] == '/' && pp->pw_dir[1] == '\0') return NULL; else #endif return Strsave(str2short(pp->pw_dir)); } #ifdef HESIOD res = hes_resolve(short2str(us), "filsys"); rp = NULL; if (res != NULL) { if ((*res) != NULL) { /* * Look at the first token to determine how to interpret * the rest of it. * Yes, strtok is evil (it's not thread-safe), but it's also * easy to use. */ cp = strtok(*res, " "); if (strcmp(cp, "AFS") == 0) { /* next token is AFS pathname.. */ cp = strtok(NULL, " "); if (cp != NULL) rp = Strsave(str2short(cp)); } else if (strcmp(cp, "NFS") == 0) { cp = NULL; if ((strtok(NULL, " ")) && /* skip remote pathname */ (strtok(NULL, " ")) && /* skip host */ (strtok(NULL, " ")) && /* skip mode */ (cp = strtok(NULL, " "))) { rp = Strsave(str2short(cp)); } } } for (res1 = res; *res1; res1++) free(*res1); #if 0 /* Don't return if root */ if (rp != NULL && rp[0] == '/' && rp[1] == '\0') { xfree(rp); rp = NULL; } #endif return rp; } #endif /* HESIOD */ return NULL; } Char * gettilde(const Char *us) { struct tildecache *bp1, *bp2, *bp; Char *hd; /* Ignore NIS special names */ if (*us == '+' || *us == '-') return NULL; if (tcache == NULL) tcache = xmalloc(TILINCR * sizeof(struct tildecache)); /* * Binary search */ for (bp1 = tcache, bp2 = tcache + tlength; bp1 < bp2;) { int i; bp = bp1 + ((bp2 - bp1) >> 1); if ((i = *us - *bp->user) == 0 && (i = Strcmp(us, bp->user)) == 0) return (bp->home); if (i < 0) bp2 = bp; else bp1 = bp + 1; } /* * Not in the cache, try to get it from the passwd file */ hd = gethomedir(us); if (hd == NULL) return NULL; /* * Update the cache */ tcache[tlength].user = Strsave(us); tcache[tlength].home = hd; tcache[tlength++].hlen = Strlen(hd); qsort(tcache, tlength, sizeof(struct tildecache), tildecompare); if (tlength == tsize) { tsize += TILINCR; tcache = xrealloc(tcache, tsize * sizeof(struct tildecache)); } return (hd); } /* * Return the username if the directory path passed contains a * user's home directory in the tilde cache, otherwise return NULL * hm points to the place where the path became different. * Special case: Our own home directory. * If we are passed a null pointer, then we flush the cache. */ Char * getusername(Char **hm) { Char *h, *p; size_t i, j; if (hm == NULL) { for (i = 0; i < tlength; i++) { xfree(tcache[i].home); xfree(tcache[i].user); } xfree(tcache); tlength = 0; tsize = TILINCR; tcache = NULL; return NULL; } p = *hm; if (((h = varval(STRhome)) != STRNULL) && (Strncmp(p, h, j = Strlen(h)) == 0) && (p[j] == '/' || p[j] == '\0')) { *hm = &p[j]; return STRNULL; } for (i = 0; i < tlength; i++) if ((Strncmp(p, tcache[i].home, (j = tcache[i].hlen)) == 0) && (p[j] == '/' || p[j] == '\0')) { *hm = &p[j]; return tcache[i].user; } return NULL; } /* * set the shell-level var to 1 or apply change to it. */ void shlvl(int val) { char *cp; if ((cp = getenv("SHLVL")) != NULL) { if (loginsh) val = 1; else val += atoi(cp); if (val <= 0) { if (adrof(STRshlvl) != NULL) unsetv(STRshlvl); Unsetenv(STRKSHLVL); } else { Char *p; p = Itoa(val, 0, 0); cleanup_push(p, xfree); setv(STRshlvl, p, VAR_READWRITE); cleanup_ignore(p); cleanup_until(p); tsetenv(STRKSHLVL, p); } } else { setcopy(STRshlvl, STR1, VAR_READWRITE); tsetenv(STRKSHLVL, STR1); } } /* fixio(): * Try to recover from a read error */ int fixio(int fd, int e) { switch (e) { case -1: /* Make sure that the code is reachable */ #ifdef EWOULDBLOCK case EWOULDBLOCK: # define FDRETRY #endif /* EWOULDBLOCK */ #if defined(POSIX) && defined(EAGAIN) # if !defined(EWOULDBLOCK) || EWOULDBLOCK != EAGAIN case EAGAIN: # define FDRETRY # endif /* !EWOULDBLOCK || EWOULDBLOCK != EAGAIN */ #endif /* POSIX && EAGAIN */ e = 0; #ifdef FDRETRY # ifdef F_SETFL /* * Great! we have on suns 3 flavors and 5 names... * I hope that will cover everything. * I added some more defines... many systems have different defines. * Rather than dealing with getting the right includes, we'll just * cover all the known possibilities here. -- sterling@netcom.com */ # ifndef O_NONBLOCK # define O_NONBLOCK 0 # endif /* O_NONBLOCK */ # ifndef O_NDELAY # define O_NDELAY 0 # endif /* O_NDELAY */ # ifndef FNBIO # define FNBIO 0 # endif /* FNBIO */ # ifndef _FNBIO # define _FNBIO 0 # endif /* _FNBIO */ # ifndef FNONBIO # define FNONBIO 0 # endif /* FNONBIO */ # ifndef FNONBLOCK # define FNONBLOCK 0 # endif /* FNONBLOCK */ # ifndef _FNONBLOCK # define _FNONBLOCK 0 # endif /* _FNONBLOCK */ # ifndef FNDELAY # define FNDELAY 0 # endif /* FNDELAY */ # ifndef _FNDELAY # define _FNDELAY 0 # endif /* _FNDELAY */ # ifndef FNDLEAY /* Some linux versions have this typo */ # define FNDLEAY 0 # endif /* FNDLEAY */ if ((e = fcntl(fd, F_GETFL, 0)) == -1) return -1; e &= ~(O_NDELAY|O_NONBLOCK|FNBIO|_FNBIO|FNONBIO|FNONBLOCK|_FNONBLOCK| FNDELAY|_FNDELAY|FNDLEAY); /* whew! */ if (fcntl(fd, F_SETFL, e) == -1) return -1; else e = 1; # endif /* F_SETFL */ # ifdef FIONBIO e = 0; if (ioctl(fd, FIONBIO, (ioctl_t) &e) == -1) return -1; else e = 1; # endif /* FIONBIO */ #endif /* FDRETRY */ return e ? 0 : -1; case EINTR: return 0; default: return -1; } } /* collate(): * String collation */ int collate(const Char *a, const Char *b) { int rv; #ifdef SHORT_STRINGS /* This strips the quote bit as a side effect */ char *sa = strsave(short2str(a)); char *sb = strsave(short2str(b)); #else char *sa = strip(strsave(a)); char *sb = strip(strsave(b)); #endif /* SHORT_STRINGS */ #if defined(NLS) && defined(HAVE_STRCOLL) errno = 0; /* strcoll sets errno, another brain-damage */ rv = strcoll(sa, sb); /* * We should be checking for errno != 0, but some systems * forget to reset errno to 0. So we only check for the * only documented valid errno value for strcoll [EINVAL] */ if (errno == EINVAL) { xfree(sa); xfree(sb); stderror(ERR_SYSTEM, "strcoll", strerror(errno)); } #else rv = strcmp(sa, sb); #endif /* NLS && HAVE_STRCOLL */ xfree(sa); xfree(sb); return rv; } #ifdef HASHBANG /* * From: peter@zeus.dialix.oz.au (Peter Wemm) * If exec() fails look first for a #! [word] [word] .... * If it is, splice the header into the argument list and retry. */ #define HACKBUFSZ 1024 /* Max chars in #! vector */ int hashbang(int fd, Char ***vp) { struct blk_buf sarg = BLK_BUF_INIT; char lbuf[HACKBUFSZ], *p, *ws; #ifdef WINNT_NATIVE int fw = 0; /* found at least one word */ int first_word = 1; char *real; #endif /* WINNT_NATIVE */ if (xread(fd, lbuf, HACKBUFSZ) <= 0) return -1; ws = 0; /* word started = 0 */ for (p = lbuf; p < &lbuf[HACKBUFSZ]; ) { switch (*p) { case ' ': case '\t': #if defined(WINNT_NATIVE) || defined (__CYGWIN__) case '\r': #endif /* WINNT_NATIVE || __CYGWIN__ */ if (ws) { /* a blank after a word.. save it */ *p = '\0'; #ifdef WINNT_NATIVE if (first_word) { real = hb_subst(ws); if (real != NULL) ws = real; } fw = 1; first_word = 0; #endif /* WINNT_NATIVE */ bb_append(&sarg, SAVE(ws)); ws = NULL; } p++; continue; case '\0': /* Whoa!! what the hell happened */ goto err; case '\n': /* The end of the line. */ if ( #ifdef WINNT_NATIVE fw || #endif /* WINNT_NATIVE */ ws) { /* terminate the last word */ *p = '\0'; #ifdef WINNT_NATIVE /* deal with the 1-word case */ if (first_word) { real = hb_subst(ws); if (real != NULL) ws = real; } #endif /* !WINNT_NATIVE */ if (ws) bb_append(&sarg, SAVE(ws)); } if (sarg.len > 0) { *vp = bb_finish(&sarg); return 0; } else goto err; default: if (!ws) /* Start a new word? */ ws = p; p++; break; } } err: bb_cleanup(&sarg); return -1; } #endif /* HASHBANG */ #ifdef REMOTEHOST static void palarm(int snum) { USE(snum); _exit(1); } static void getremotehost(int dest_fd) { const char *host = NULL; #ifdef INET6 struct sockaddr_storage saddr; static char hbuf[NI_MAXHOST]; #else struct hostent* hp; struct sockaddr_in saddr; #endif socklen_t len = sizeof(saddr); #ifdef INET6 if (getpeername(SHIN, (struct sockaddr *) &saddr, &len) != -1 && (saddr.ss_family == AF_INET6 || saddr.ss_family == AF_INET)) { int flag = NI_NUMERICHOST; #ifdef NI_WITHSCOPEID flag |= NI_WITHSCOPEID; #endif getnameinfo((struct sockaddr *)&saddr, len, hbuf, sizeof(hbuf), NULL, 0, flag); host = hbuf; #else if (getpeername(SHIN, (struct sockaddr *) &saddr, &len) != -1 && saddr.sin_family == AF_INET) { #if 0 if ((hp = gethostbyaddr((char *)&saddr.sin_addr, sizeof(struct in_addr), AF_INET)) != NULL) host = hp->h_name; else #endif host = inet_ntoa(saddr.sin_addr); #endif } #ifdef HAVE_STRUCT_UTMP_UT_HOST else { char *ptr; char *name = utmphost(); /* Avoid empty names and local X displays */ if (name != NULL && *name != '\0' && *name != ':') { struct in_addr addr; char *sptr; /* Look for host:display.screen */ /* * There is conflict with IPv6 address and X DISPLAY. So, * we assume there is no IPv6 address in utmp and don't * touch here. */ if ((sptr = strchr(name, ':')) != NULL) *sptr = '\0'; /* Leave IPv4 address as is */ /* * we use inet_addr here, not inet_aton because many systems * have not caught up yet. */ addr.s_addr = inet_addr(name); if (addr.s_addr != (unsigned int)~0) host = name; else { if (sptr != name) { #ifdef INET6 char *s, *domain; char dbuf[MAXHOSTNAMELEN]; struct addrinfo hints, *res = NULL; memset(&hints, 0, sizeof(hints)); hints.ai_family = PF_UNSPEC; hints.ai_socktype = SOCK_STREAM; hints.ai_flags = AI_PASSIVE | AI_CANONNAME; if (strlen(name) < utmphostsize()) { if (getaddrinfo(name, NULL, &hints, &res) != 0) res = NULL; } else if (gethostname(dbuf, sizeof(dbuf)) == 0 && (dbuf[sizeof(dbuf)-1] = '\0', /*FIXME: ugly*/ (domain = strchr(dbuf, '.')) != NULL)) { for (s = strchr(name, '.'); s != NULL; s = strchr(s + 1, '.')) { if (*(s + 1) != '\0' && (ptr = strstr(domain, s)) != NULL) { char *cbuf; cbuf = strspl(name, ptr); if (getaddrinfo(cbuf, NULL, &hints, &res) != 0) res = NULL; xfree(cbuf); break; } } } if (res != NULL) { if (res->ai_canonname != NULL) { strncpy(hbuf, res->ai_canonname, sizeof(hbuf)); host = hbuf; } freeaddrinfo(res); } #else if ((hp = gethostbyname(name)) == NULL) { /* Try again eliminating the trailing domain */ if ((ptr = strchr(name, '.')) != NULL) { *ptr = '\0'; if ((hp = gethostbyname(name)) != NULL) host = hp->h_name; *ptr = '.'; } } else host = hp->h_name; #endif } } } } #endif if (host) { size_t left; left = strlen(host); while (left != 0) { ssize_t res; res = xwrite(dest_fd, host, left); if (res < 0) _exit(1); host += res; left -= res; } } _exit(0); } /* * From: (Lennart Svensson) */ void remotehost(void) { struct sigaction sa; struct strbuf hostname = strbuf_INIT; int fds[2], wait_options, status; pid_t pid, wait_res; sa.sa_handler = SIG_DFL; /* Make sure a zombie is created */ sigemptyset(&sa.sa_mask); sa.sa_flags = 0; sigaction(SIGCHLD, &sa, NULL); mypipe(fds); pid = fork(); if (pid == 0) { sigset_t set; xclose(fds[0]); /* Don't get stuck if the resolver does not work! */ signal(SIGALRM, palarm); sigemptyset(&set); sigaddset(&set, SIGALRM); (void)sigprocmask(SIG_UNBLOCK, &set, NULL); (void)alarm(2); getremotehost(fds[1]); /*NOTREACHED*/ } xclose(fds[1]); for (;;) { char buf[BUFSIZE]; ssize_t res; res = xread(fds[0], buf, sizeof(buf)); if (res == -1) { hostname.len = 0; wait_options = WNOHANG; goto done; } if (res == 0) break; strbuf_appendn(&hostname, buf, res); } wait_options = 0; done: xclose(fds[0]); while ((wait_res = waitpid(pid, &status, wait_options)) == -1 && errno == EINTR) handle_pending_signals(); cleanup_push(&hostname, strbuf_cleanup); if (wait_res == pid && WIFEXITED(status) && WEXITSTATUS(status) == 0) { strbuf_terminate(&hostname); tsetenv(STRREMOTEHOST, str2short(hostname.s)); } cleanup_until(&hostname); #ifdef YPBUGS /* From: casper@fwi.uva.nl (Casper H.S. Dik), for Solaris 2.3 */ fix_yp_bugs(); #endif /* YPBUGS */ } #endif /* REMOTEHOST */ #ifndef WINNT_NATIVE /* * indicate if a terminal type is defined in terminfo/termcap * (by default the current term type). This allows ppl to look * for a working term type automatically in their login scripts * when using a terminal known as different things on different * platforms */ void dotermname(Char **v, struct command *c) { char *termtype; /* * Maximum size of a termcap record. We make it twice as large. */ char termcap_buffer[2048]; USE(c); /* try to find which entry we should be looking for */ termtype = (v[1] == NULL ? getenv("TERM") : short2str(v[1])); if (termtype == NULL) { /* no luck - the user didn't provide one and none is * specified in the environment */ setcopy(STRstatus, STR1, VAR_READWRITE); return; } /* * we use the termcap function - if we are using terminfo we * will end up with it's compatibility function * terminfo/termcap will be initialized with the new * type but we don't care because tcsh has cached all the things * it needs. */ if (tgetent(termcap_buffer, termtype) == 1) { xprintf("%s\n", termtype); setcopy(STRstatus, STR0, VAR_READWRITE); } else setcopy(STRstatus, STR1, VAR_READWRITE); } #endif /* WINNT_NATIVE */