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@@ -0,0 +1,198 @@
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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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+ * 4. 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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+
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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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+#endif
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+
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+#include <ttyent.h>
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+#include <stdio.h>
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+#include <stdio_ext.h>
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+#include <ctype.h>
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+#include <string.h>
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+
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+static char zapchar;
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+static FILE *tf;
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+
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+struct ttyent *
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+getttynam(const char *tty)
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+{
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+ register struct ttyent *t;
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+
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+ setttyent();
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+ while ((t = getttyent()))
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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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+
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+static char *skip __P((char *));
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+static char *value __P((char *));
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+
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+struct ttyent * getttyent()
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+{
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+ static struct ttyent tty;
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+ register int c;
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+ register char *p;
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+#define MAXLINELENGTH 100
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+ static char line[MAXLINELENGTH];
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+
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+ if (!tf && !setttyent())
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+ return (NULL);
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+ flockfile (tf);
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+ for (;;) {
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+ if (!fgets_unlocked(p = line, sizeof(line), tf)) {
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+ funlockfile (tf);
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+ return (NULL);
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+ }
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+ /* skip lines that are too big */
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+ if (!index(p, '\n')) {
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+ while ((c = getc_unlocked(tf)) != '\n' && c != EOF)
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+ ;
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+ continue;
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+ }
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+ while (isspace(*p))
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+ ++p;
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+ if (*p && *p != '#')
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+ break;
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+ }
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+
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+ zapchar = 0;
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+ tty.ty_name = p;
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+ p = skip(p);
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+ if (!*(tty.ty_getty = p))
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+ tty.ty_getty = tty.ty_type = NULL;
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+ else {
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+ p = skip(p);
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+ if (!*(tty.ty_type = p))
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+ tty.ty_type = NULL;
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+ else
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+ p = skip(p);
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+ }
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+ tty.ty_status = 0;
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+ tty.ty_window = NULL;
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+
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+#define scmp(e) !strncmp(p, e, sizeof(e) - 1) && isspace(p[sizeof(e) - 1])
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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)) {
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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 (vcmp(_TTYS_WINDOW))
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+ tty.ty_window = value(p);
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+ else
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+ break;
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+ }
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+ /* We can release the lock only here since `zapchar' is global. */
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+ funlockfile(tf);
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+
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+ if (zapchar == '#' || *p == '#')
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+ while ((c = *++p) == ' ' || c == '\t')
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+ ;
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+ tty.ty_comment = p;
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+ if (*p == 0)
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+ tty.ty_comment = 0;
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+ if ((p = index(p, '\n')))
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+ *p = '\0';
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+ return (&tty);
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+}
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+
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+#define QUOTED 1
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+
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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 * skip(register char *p)
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+{
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+ register char *t;
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+ register int c, q;
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+
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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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+ break;
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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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+ break;
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+ }
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+ }
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+ *--t = '\0';
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+ return (p);
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+}
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+
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+static char * value(register char *p)
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+{
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+
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+ return ((p = index(p, '=')) ? ++p : NULL);
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+}
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+
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+int setttyent(void)
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+{
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+
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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_TTYS, "r"))) {
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+ /* We do the locking ourselves. */
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+ __fsetlocking (tf, FSETLOCKING_BYCALLER);
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+ return (1);
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+ }
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+ return (0);
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+}
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+
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+int endttyent(void)
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+{
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+ int rval;
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+
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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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Eric Andersen