* Updating common/lib * Updating lib/csu * Updating lib/libc * Updating libexec/ld.elf_so * Corrected test on __minix in featuretest to actually follow the meaning of the comment. * Cleaned up _REENTRANT-related defintions. * Disabled -D_REENTRANT for libfetch * Removing some unneeded __NBSD_LIBC defines and tests Change-Id: Ic1394baef74d11b9f86b312f5ff4bbc3cbf72ce2
248 lines
5.7 KiB
C
248 lines
5.7 KiB
C
/* $NetBSD: getttyent.c,v 1.24 2011/10/15 23:00:01 christos Exp $ */
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/*
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* Copyright (c) 1989, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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#if defined(LIBC_SCCS) && !defined(lint)
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#if 0
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static char sccsid[] = "@(#)getttyent.c 8.1 (Berkeley) 6/4/93";
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#else
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__RCSID("$NetBSD: getttyent.c,v 1.24 2011/10/15 23:00:01 christos Exp $");
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#endif
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#endif /* LIBC_SCCS and not lint */
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#include "namespace.h"
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#include <assert.h>
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#include <ctype.h>
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#include <stdio.h>
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#include <string.h>
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#include <ttyent.h>
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#include <errno.h>
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#include <err.h>
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#include <stdlib.h>
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#ifdef __weak_alias
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__weak_alias(endttyent,_endttyent)
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__weak_alias(getttyent,_getttyent)
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__weak_alias(getttynam,_getttynam)
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__weak_alias(setttyent,_setttyent)
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__weak_alias(setttyentpath,_setttyentpath)
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#endif
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static FILE *tf;
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static size_t lineno = 0;
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static char *skip(char *, char *);
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static char *value(char *);
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struct ttyent *
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getttynam(const char *tty)
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{
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struct ttyent *t;
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_DIAGASSERT(tty != NULL);
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setttyent();
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while ((t = getttyent()) != NULL)
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if (!strcmp(tty, t->ty_name))
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break;
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endttyent();
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return (t);
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}
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struct ttyent *
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getttyent(void)
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{
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static struct ttyent tty;
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int c;
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char *p;
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size_t len;
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static char *line = NULL;
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char zapchar;
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if (line)
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free(line);
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if (!tf && !setttyent())
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return NULL;
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for (;;) {
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errno = 0;
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line = fparseln(tf, &len, &lineno, NULL, FPARSELN_UNESCALL);
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if (line == NULL) {
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if (errno != 0)
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warn("%s", __func__);
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return NULL;
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}
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for (p = line; *p && isspace((unsigned char)*p); p++)
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continue;
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if (*p && *p != '#')
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break;
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free(line);
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}
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tty.ty_name = p;
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p = skip(p, &zapchar);
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if (*(tty.ty_getty = p) == '\0')
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tty.ty_getty = tty.ty_type = NULL;
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else {
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p = skip(p, &zapchar);
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if (*(tty.ty_type = p) == '\0')
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tty.ty_type = NULL;
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else
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p = skip(p, &zapchar);
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}
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tty.ty_status = 0;
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tty.ty_window = NULL;
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tty.ty_class = NULL;
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#define scmp(e) !strncmp(p, e, sizeof(e) - 1) && (isspace((unsigned char) p[sizeof(e) - 1]) || p[sizeof(e) - 1] == '\0')
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#define vcmp(e) !strncmp(p, e, sizeof(e) - 1) && p[sizeof(e) - 1] == '='
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for (; *p; p = skip(p, &zapchar)) {
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if (scmp(_TTYS_OFF))
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tty.ty_status &= ~TTY_ON;
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else if (scmp(_TTYS_ON))
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tty.ty_status |= TTY_ON;
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else if (scmp(_TTYS_SECURE))
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tty.ty_status |= TTY_SECURE;
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else if (scmp(_TTYS_LOCAL))
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tty.ty_status |= TTY_LOCAL;
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else if (scmp(_TTYS_RTSCTS))
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tty.ty_status |= TTY_RTSCTS;
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else if (scmp(_TTYS_DTRCTS))
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tty.ty_status |= TTY_DTRCTS;
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else if (scmp(_TTYS_SOFTCAR))
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tty.ty_status |= TTY_SOFTCAR;
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else if (scmp(_TTYS_MDMBUF))
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tty.ty_status |= TTY_MDMBUF;
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else if (vcmp(_TTYS_WINDOW))
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tty.ty_window = value(p);
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else if (vcmp(_TTYS_CLASS))
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tty.ty_class = value(p);
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else
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warnx("%s: %s, %lu: unknown option `%s'",
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__func__, _PATH_TTYS, (unsigned long)lineno, p);
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}
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if (zapchar == '#' || *p == '#')
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while ((c = *++p) == ' ' || c == '\t')
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continue;
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tty.ty_comment = p;
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if (*p == '\0')
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tty.ty_comment = NULL;
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if ((p = strchr(p, '\n')) != NULL)
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*p = '\0';
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return &tty;
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}
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#define QUOTED 1
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/*
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* Skip over the current field, removing quotes, and return a pointer to
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* the next field.
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*/
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static char *
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skip(char *p, char *zapchar)
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{
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char *t;
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int c, q;
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_DIAGASSERT(p != NULL);
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*zapchar = '\0';
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for (q = 0, t = p; (c = *p) != '\0'; p++) {
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if (c == '"') {
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q ^= QUOTED; /* obscure, but nice */
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continue;
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}
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if (q == QUOTED && *p == '\\' && *(p+1) == '"')
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p++;
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*t++ = *p;
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if (q == QUOTED)
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continue;
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if (c == '#') {
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*zapchar = c;
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*p = '\0';
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*--t = '\0';
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return p;
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}
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if (c == '\t' || c == ' ' || c == '\n') {
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*zapchar = c;
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*p++ = '\0';
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while ((c = *p) == '\t' || c == ' ' || c == '\n')
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p++;
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*--t = '\0';
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return p;
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}
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}
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if (t != p)
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*t = '\0';
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return p;
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}
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static char *
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value(char *p)
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{
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_DIAGASSERT(p != NULL);
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return (p = strchr(p, '=')) != NULL ? ++p : NULL;
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}
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int
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setttyentpath(const char *path)
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{
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lineno = 0;
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if (tf) {
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rewind(tf);
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return 1;
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} else if ((tf = fopen(path, "r")) != NULL)
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return 1;
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return 0;
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}
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int
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setttyent(void)
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{
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return setttyentpath(_PATH_TTYS);
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}
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int
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endttyent(void)
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{
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int rval;
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if (tf) {
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rval = !(fclose(tf) == EOF);
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tf = NULL;
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return rval;
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}
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return 1;
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}
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