update from main archive 961201cvs/libc-961202

Mon Dec  2 03:59:38 1996  Ulrich Drepper  <drepper@cygnus.com>

	* grp/initgroups.c: Update and reformat copyright.
	Use __getgrent_r instead of getgrent.

	* inet/rcmd.c: Update and reformat copyright.
	Use __gethostbyname_r instead of gethostbyname.
	* inet/rexec.c: Likewise.

	* intl/finddomain.c: Correct comment about CEN sponsor and revision.
	* locale/findlocale.c: Likewise.
	* intl/l10nflist.c: Correct handling of CEN sponsor and revision.
	* locale/Makefile (CPPFLAGS): Add definition of LOCALEDIR.
	* locale/setlocale.c (setlocale): Correctly split value of
	LOCALE_PATH.
	* locale/programs/localedef.c: Use LOCALEDIR not LOCALE_PATH to
	find output directory.

	* nss/getXXbyYY.c [NEED_H_ERRNO]: Before enlarging buffer test
	h_errno_tmp variable.
	Save error value from being changed during `free' call.
	* nss/getXXent.c: Likewise.

	* nss/nss_files/files-XXX.c: Set h_errno variable to NETDB_INTERNAL
	before returning ERANGE error.

	* posix/glob.c: Use getlogin_r and getpwnam_r function when available
	or in GNU libc.

	* pwd/getpw.c: Use getpwuid_r instead of getpwuid.

	* sunrpc/clnt_gen.c: Use gethostbyname_r and getprotobyname_r.
	* sunrpc/clnt_simp.c: Likewise.
	* sunrpc/getrpcport.c: Likewise.
	* sysdeps/unix/sysv/linux/gethostid.c: Likewise.

	* posix/getconf.c: Treat _SC_UNIT_MAX and _SC_ULONG_MAX separately
	since the value might be outsode the range of the `long int'.
	Print string `undefined' when a value is undefined.

	* stdlib/l64a.c: Return correct pointer.
	Patch by NIIBE Yutaka <gniibe@mri.co.jp>.

	* string/Makefile (routines): Add argz-addsep.
	* string/argz-addsep.c: New file.
	* string/argz.h: Add prototypes for argz_add_sep.

	* string/argz-ctsep.c: Prevent memory leak.

	* string/strcoll.c: Correct typo in comment.

Sat Nov 30 02:53:59 1996  Ulrich Drepper  <drepper@cygnus.com>

	* sysdeps/unix/sysv/linux/sys/serial.h: Removed again.  The file is
	not general enough to be part of the libc.
	* sysdeps/unix/sysv/linux/Dist: Remove sys/serial.h.
	* sysdeps/unix/sysv/linux/Makefile: Don't install sys/serial.h.

Thu Nov 28 20:04:41 1996  Andreas Schwab  <schwab@issan.informatik.uni-dortmund.de>

	* login/Makefile: Fix typo.

	* nss/Makefile (generated): Filter out db-alias.c.

Thu Nov 28 14:44:01 1996  Andreas Schwab  <schwab@issan.informatik.uni-dortmund.de>

	* time/Makefile (echo-zonenames): Don't depend on non-existing
	target `zonenames'.

Thu Nov 28 12:34:05 1996  Andreas Schwab  <schwab@issan.informatik.uni-dortmund.de>

	* link.h: New file.
	* nss/nsswitch.c: Use it.

	* printf.h: Fix file name.
	* stdlib/strfmon.c: Use it.

1 files changed, 61 insertions, 15 deletions

diff --git a/inet/rcmd.c b/inet/rcmd.c
index 3fc8adc..2631523 100644
--- a/inet/rcmd.c
+++ b/inet/rcmd.c
@@ -42,6 +42,7 @@ static char sccsid[] = "@(#)rcmd.c	8.3 (Berkeley) 3/26/94";
 #include <netinet/in.h>
 #include <arpa/inet.h>
 
+#include <alloca.h>
 #include <signal.h>
 #include <fcntl.h>
 #include <netdb.h>
@@ -63,20 +64,35 @@ rcmd(ahost, rport, locuser, remuser, cmd, fd2p)
 	const char *locuser, *remuser, *cmd;
 	int *fd2p;
 {
-	struct hostent *hp;
+	struct hostent hostbuf, *hp;
+	size_t hstbuflen;
+	char *tmphstbuf;
 	struct sockaddr_in sin, from;
 	fd_set reads;
 	int32_t oldmask;
 	pid_t pid;
 	int s, lport, timo;
 	char c;
+	int herr;
 
 	pid = getpid();
-	hp = gethostbyname(*ahost);
-	if (hp == NULL) {
-		herror(*ahost);
-		return (-1);
-	}
+
+	hstbuflen = 1024;
+	tmphstbuf = __alloca (hstbuflen);
+	while (__gethostbyname_r (*ahost, &hostbuf, tmphstbuf, hstbuflen,
+				  &hp, &herr) < 0)
+	  if (herr != NETDB_INTERNAL || errno != ERANGE)
+	    {
+	      herror(*ahost);
+	      return -1;
+	    }
+	  else
+	    {
+	      /* Enlarge the buffer.  */
+	      hstbuflen *= 2;
+	      tmphstbuf = __alloca (hstbuflen);
+	    }
+
 	*ahost = hp->h_name;
 	oldmask = sigblock(sigmask(SIGURG));
 	for (timo = 1, lport = IPPORT_RESERVED - 1;;) {
@@ -244,12 +260,27 @@ ruserok(rhost, superuser, ruser, luser)
 	const char *rhost, *ruser, *luser;
 	int superuser;
 {
-	struct hostent *hp;
+	struct hostent hostbuf, *hp;
+	size_t buflen;
+	char *buffer;
 	u_int32_t addr;
 	char **ap;
+	int herr;
+
+	buflen = 1024;
+	buffer = __alloca (buflen);
+
+	while (__gethostbyname_r (rhost, &hostbuf, buffer, buflen, &hp, &herr)
+	       < 0)
+	  if (herr != NETDB_INTERNAL || errno != ERANGE)
+	    return -1;
+	  else
+	    {
+	      /* Enlarge the buffer.  */
+	      buflen *= 2;
+	      buffer = __alloca (buflen);
+	    }
 
-	if ((hp = gethostbyname(rhost)) == NULL)
-		return (-1);
 	for (ap = hp->h_addr_list; *ap; ++ap) {
 		bcopy(*ap, &addr, sizeof(addr));
 		if (iruserok(addr, superuser, ruser, luser) == 0)
@@ -275,7 +306,7 @@ iruserok(raddr, superuser, ruser, luser)
 {
 	register char *cp;
 	struct stat sbuf;
-	struct passwd *pwd;
+	struct passwd pwdbuf, *pwd;
 	FILE *hostf;
 	uid_t uid;
 	int first;
@@ -293,10 +324,12 @@ again:
 	if (first == 1 && (__check_rhosts_file || superuser)) {
 		char *pbuf;
 		size_t dirlen;
+		size_t buflen = __sysconf (_SC_GETPW_R_SIZE_MAX);
+		char buffer = __alloca (buflen);
 
 		first = 0;
-		if ((pwd = getpwnam(luser)) == NULL)
-			return (-1);
+		if (getpwnam_r (luser, &pwdbuf, buffer, buflen, &pwd) < 0)
+			return -1;
 
 		dirlen = strlen (pwd->pw_dir);
 		pbuf = alloca (dirlen + sizeof "/.rhosts");
@@ -395,17 +428,30 @@ __icheckhost(raddr, lhost)
 	u_int32_t raddr;
 	register char *lhost;
 {
-	register struct hostent *hp;
+	register struct hostent hostbuf, *hp;
+	size_t buflen;
+	char *buffer;
 	register u_int32_t laddr;
 	register char **pp;
+	int herr;
 
 	/* Try for raw ip address first. */
 	if (isdigit(*lhost) && (int32_t)(laddr = inet_addr(lhost)) != -1)
 		return (raddr == laddr);
 
 	/* Better be a hostname. */
-	if ((hp = gethostbyname(lhost)) == NULL)
-		return (0);
+	buflen = 1024;
+	buffer = __alloca (buflen);
+	while (__gethostbyname_r (lhost, &hostbuf, buffer, buflen, &hp, &herr)
+	       < 0)
+	  if (herr != NETDB_INTERNAL || errno != ERANGE)
+	    return 0;
+	  else
+	    {
+	      /* Enlarge the buffer.  */
+	      buflen *= 2;
+	      buflen = __alloca (buflen);
+	    }
 
 	/* Spin through ip addresses. */
 	for (pp = hp->h_addr_list; *pp; ++pp)