glibc/misc/getttyent.c
Ulrich Drepper 79937577d1 Update.
2004-09-13  Ulrich Drepper  <drepper@redhat.com>

	* misc/sys/cdefs.h: Restore old definition of __P.
	* csu/munch.awk: Remove uses of __P and __PMT.
	* gmon/gmon.c: Likewise.
	* hesiod/hesiod.h: Likewise.
	* include/stdio.h: Likewise.
	* io/fts.c: Likewise.
	* libio/genops.c: Likewise.
	* libio/libioP.h: Likewise.
	* libio/fileops.c: Likewise.
	* libio/iolibio.h: Likewise.
	* libio/libio.h: Likewise.
	* libio/memstream.c: Likewise.
	* libio/oldfileops.c: Likewise.
	* libio/oldstdfiles.c: Likewise.
	* libio/iopopen.c: Likewise.
	* libio/vsnprintf.c: Likewise.
	* libio/vswprintf.c: Likewise.
	* libio/wgenops.c: Likewise.
	* libio/oldiopopen.c: Likewise.
	* locale/programs/xmalloc.c: Likewise.
	* locale/programs/xstrdup.c: Likewise.
	* malloc/mtrace.c: Likewise.
	* misc/getttyent.c: Likewise.
	* misc/getusershell.c: Likewise.
	* nis/rpcsvc/ypupd.h: Likewise.
	* posix/fnmatch.h: Likewise.
	* posix/glob.h: Likewise.
	* resolv/arpa/nameser.h: Likewise.
	* resolv/gethnamaddr.c: Likewise.
	* resolv/resolv.h: Likewise.
	* resolv/inet_net_ntop.c: Likewise.
	* resolv/inet_net_pton.c: Likewise.
	* resolv/res_init.c: Likewise.
	* resolv/nss_dns/dns-network.c: Likewise.
	* stdio-common/vfprintf.c: Likewise.
	* stdio-common/reg-printf.c: Likewise.
	* sysdeps/generic/chflags.c: Likewise.
	* sysdeps/generic/fchflags.c: Likewise.
	* sysdeps/generic/glob.c: Likewise.
	* sysdeps/generic/printf_fphex.c: Likewise.
	* sysdeps/generic/memcmp.c: Likewise.
	* sysdeps/generic/memcopy.h: Likewise.
	* sysdeps/generic/morecore.c: Likewise.
	* sysdeps/generic/sstk.c: Likewise.
	* sysdeps/posix/sigvec.c: Likewise.
	* sysdeps/posix/ttyname_r.c: Likewise.
	* sysdeps/standalone/arm/bits/errno.h: Likewise.
	* sysdeps/standalone/standalone.h: Likewise.
	* sysdeps/standalone/i386/force_cpu386/brdinit.c: Likewise.
	* sysdeps/standalone/i386/force_cpu386/_exit.c: Likewise.
	* sysdeps/unix/arm/start.c: Likewise.
	* sysdeps/unix/bsd/sigaction.c: Likewise.
	* sysdeps/unix/bsd/sun/m68k/sigtramp.c: Likewise.
	* sysdeps/unix/bsd/sun/sparc/sigtramp.c: Likewise.
	* sysdeps/unix/bsd/sun/sunos4/wait4.c: Likewise.
	* sysdeps/unix/bsd/ultrix4/mips/sigvec.c: Likewise.
	* sysdeps/unix/bsd/ultrix4/sysconf.c: Likewise.
	* sysdeps/unix/sparc/start.c: Likewise.
	* sysdeps/unix/sysv/getdents.c: Likewise.
	* sysdeps/unix/sysv/irix4/fpathconf.c: Likewise.
	* sysdeps/unix/sysv/irix4/getgroups.c: Likewise.
	* sysdeps/unix/sysv/irix4/getpriority.c: Likewise.
	* sysdeps/unix/sysv/irix4/getrusage.c: Likewise.
	* sysdeps/unix/sysv/irix4/pathconf.c: Likewise.
	* sysdeps/unix/sysv/irix4/setgroups.c: Likewise.
	* sysdeps/unix/sysv/irix4/sigtramp.c: Likewise.
	* sysdeps/unix/sysv/irix4/start.c: Likewise.
	* sysdeps/unix/sysv/irix4/sysconf.c: Likewise.
	* sysdeps/unix/sysv/sco3.2.4/__setpgid.c: Likewise.
	* sysdeps/unix/sysv/sco3.2.4/getgroups.c: Likewise.
	* sysdeps/unix/sysv/sysv4/__getpgid.c: Likewise.
	* sysdeps/unix/sysv/sysv4/__setpgid.c: Likewise.
	* sysdeps/unix/sysv/sysv4/getpgid.c: Likewise.
	* sysdeps/unix/sysv/sysv4/setpgid.c: Likewise.
	* sysdeps/unix/sysv/sysv4/sethostname.c: Likewise.
	* sysdeps/unix/sysv/sysv4/setsid.c: Likewise.
	* sysdeps/unix/sysv/sysv4/sysconf.c: Likewise.
	* sysdeps/unix/sysv/sysv4/waitpid.c: Likewise.
	* sysdeps/unix/sysv/sysv4/solaris2/getdents.c: Likewise.
	* time/tzset.c: Likewise.
	* time/strftime_l.c: Likewise.
	* time/strptime_l.c: Likewise.
	* crypt/md5.h: Likewise.
2004-09-14 04:41:35 +00:00

217 lines
4.9 KiB
C

/*
* Copyright (c) 1989, 1993
* 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.
* 4. 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.
*/
#if defined(LIBC_SCCS) && !defined(lint)
static char sccsid[] = "@(#)getttyent.c 8.1 (Berkeley) 6/4/93";
#endif /* LIBC_SCCS and not lint */
#include <ttyent.h>
#include <stdio.h>
#include <stdio_ext.h>
#include <ctype.h>
#include <string.h>
#ifdef USE_IN_LIBIO
# define flockfile(s) _IO_flockfile (s)
# define funlockfile(s) _IO_funlockfile (s)
#endif
static char zapchar;
static FILE *tf;
struct ttyent *
getttynam(tty)
const char *tty;
{
register struct ttyent *t;
setttyent();
while ((t = getttyent()))
if (!strcmp(tty, t->ty_name))
break;
endttyent();
return (t);
}
static char *skip (char *) __THROW internal_function;
static char *value (char *) __THROW internal_function;
struct ttyent *
getttyent()
{
static struct ttyent tty;
register int c;
register char *p;
#define MAXLINELENGTH 100
static char line[MAXLINELENGTH];
if (!tf && !setttyent())
return (NULL);
flockfile (tf);
for (;;) {
if (!fgets_unlocked(p = line, sizeof(line), tf)) {
funlockfile (tf);
return (NULL);
}
/* skip lines that are too big */
if (!index(p, '\n')) {
while ((c = getc_unlocked(tf)) != '\n' && c != EOF)
;
continue;
}
while (isspace(*p))
++p;
if (*p && *p != '#')
break;
}
zapchar = 0;
tty.ty_name = p;
p = skip(p);
if (!*(tty.ty_getty = p))
tty.ty_getty = tty.ty_type = NULL;
else {
p = skip(p);
if (!*(tty.ty_type = p))
tty.ty_type = NULL;
else
p = skip(p);
}
tty.ty_status = 0;
tty.ty_window = NULL;
#define scmp(e) !strncmp(p, e, sizeof(e) - 1) && isspace(p[sizeof(e) - 1])
#define vcmp(e) !strncmp(p, e, sizeof(e) - 1) && p[sizeof(e) - 1] == '='
for (; *p; p = skip(p)) {
if (scmp(_TTYS_OFF))
tty.ty_status &= ~TTY_ON;
else if (scmp(_TTYS_ON))
tty.ty_status |= TTY_ON;
else if (scmp(_TTYS_SECURE))
tty.ty_status |= TTY_SECURE;
else if (vcmp(_TTYS_WINDOW))
tty.ty_window = value(p);
else
break;
}
/* We can release the lock only here since `zapchar' is global. */
funlockfile(tf);
if (zapchar == '#' || *p == '#')
while ((c = *++p) == ' ' || c == '\t')
;
tty.ty_comment = p;
if (*p == 0)
tty.ty_comment = 0;
if ((p = index(p, '\n')))
*p = '\0';
return (&tty);
}
libc_hidden_def (getttyent)
#define QUOTED 1
/*
* Skip over the current field, removing quotes, and return a pointer to
* the next field.
*/
static char *
internal_function
skip(p)
register char *p;
{
register char *t;
register int c, q;
for (q = 0, t = p; (c = *p) != '\0'; p++) {
if (c == '"') {
q ^= QUOTED; /* obscure, but nice */
continue;
}
if (q == QUOTED && *p == '\\' && *(p+1) == '"')
p++;
*t++ = *p;
if (q == QUOTED)
continue;
if (c == '#') {
zapchar = c;
*p = 0;
break;
}
if (c == '\t' || c == ' ' || c == '\n') {
zapchar = c;
*p++ = 0;
while ((c = *p) == '\t' || c == ' ' || c == '\n')
p++;
break;
}
}
*--t = '\0';
return (p);
}
static char *
internal_function
value(p)
register char *p;
{
return ((p = index(p, '=')) ? ++p : NULL);
}
int
setttyent()
{
if (tf) {
(void)rewind(tf);
return (1);
} else if ((tf = fopen(_PATH_TTYS, "rc"))) {
/* We do the locking ourselves. */
__fsetlocking (tf, FSETLOCKING_BYCALLER);
return (1);
}
return (0);
}
libc_hidden_def (setttyent)
int
endttyent()
{
int rval;
if (tf) {
rval = !(fclose(tf) == EOF);
tf = NULL;
return (rval);
}
return (1);
}
libc_hidden_def (endttyent)