Move 'aliases' routines from 'inet' into 'nss'

The aliases routines are entry points for nss functionality.  This
commit moves aliases.h and the aliases routines from the 'inet'
subdirectory to 'nss', and adjusts any external references.
Reviewed-by: Adhemerval Zanella  <adhemerval.zanella@linaro.org>

7 files changed, 197 insertions, 0 deletions

diff --git a/nss/Makefile b/nss/Makefile
index 84cf62af2b..2dfa7ebef9 100644
--- a/nss/Makefile
+++ b/nss/Makefile
@@ -23,6 +23,7 @@ subdir	:= nss
 include ../Makeconfig
 
 headers := \
+  aliases.h \
   grp.h \
   gshadow.h \
   nss.h \
@@ -54,6 +55,19 @@ routines = \
   valid_list_field \
   # routines
 
+# alias routines:
+routines += \
+  getaliasent \
+  getaliasent_r \
+  getaliasname \
+  getaliasname_r \
+  # routines
+
+ifeq ($(have-thread-library),yes)
+CFLAGS-getaliasent_r.c += -fexceptions
+CFLAGS-getaliasent.c += -fexceptions
+endif
+
 # grp routines:
 routines += \
   fgetgrent \
diff --git a/nss/Versions b/nss/Versions
index 632af25be4..5d1b1dac3d 100644
--- a/nss/Versions
+++ b/nss/Versions
@@ -17,6 +17,7 @@ libc {
     fgetspent; fgetspent_r;
 
     # g*
+    getaliasbyname; getaliasbyname_r; getaliasent; getaliasent_r;
     getgrent; getgrent_r; getgrgid; getgrgid_r; getgrnam; getgrnam_r;
     getgroups;
     getpw; getpwent; getpwent_r; getpwnam; getpwnam_r; getpwuid; getpwuid_r;
diff --git a/nss/aliases.h b/nss/aliases.h
new file mode 100644
index 0000000000..bdd704ac6f
--- /dev/null
+++ b/nss/aliases.h
@@ -0,0 +1,63 @@
+/* Copyright (C) 1996-2023 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <https://www.gnu.org/licenses/>.  */
+
+#ifndef _ALIASES_H
+#define _ALIASES_H	1
+
+#include <features.h>
+
+#include <sys/types.h>
+
+
+__BEGIN_DECLS
+
+/* Structure to represent one entry of the alias database.  */
+struct aliasent
+  {
+    char *alias_name;
+    size_t alias_members_len;
+    char **alias_members;
+    int alias_local;
+  };
+
+
+/* Open alias data base files.  */
+extern void setaliasent (void) __THROW;
+
+/* Close alias database files.  */
+extern void endaliasent (void) __THROW;
+
+/* Get the next entry from the alias database.  */
+extern struct aliasent *getaliasent (void) __THROW;
+
+/* Get the next entry from the alias database and put it in RESULT_BUF.  */
+extern int getaliasent_r (struct aliasent *__restrict __result_buf,
+			  char *__restrict __buffer, size_t __buflen,
+			  struct aliasent **__restrict __result) __THROW;
+
+/* Get alias entry corresponding to NAME.  */
+extern struct aliasent *getaliasbyname (const char *__name) __THROW;
+
+/* Get alias entry corresponding to NAME and put it in RESULT_BUF.  */
+extern int getaliasbyname_r (const char *__restrict __name,
+			     struct aliasent *__restrict __result_buf,
+			     char *__restrict __buffer, size_t __buflen,
+			     struct aliasent **__restrict __result) __THROW;
+
+__END_DECLS
+
+#endif /* aliases.h */
diff --git a/nss/getaliasent.c b/nss/getaliasent.c
new file mode 100644
index 0000000000..16ec063d1e
--- /dev/null
+++ b/nss/getaliasent.c
@@ -0,0 +1,28 @@
+/* Copyright (C) 1996-2023 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <https://www.gnu.org/licenses/>.  */
+
+#include <aliases.h>
+
+
+#define LOOKUP_TYPE	struct aliasent
+#define	GETFUNC_NAME	getaliasent
+#define BUFLEN		1024
+
+/* There is no nscd support for the aliases file.  */
+#undef	USE_NSCD
+
+#include "../nss/getXXent.c"
diff --git a/nss/getaliasent_r.c b/nss/getaliasent_r.c
new file mode 100644
index 0000000000..8ce9d3a58c
--- /dev/null
+++ b/nss/getaliasent_r.c
@@ -0,0 +1,30 @@
+/* Copyright (C) 1996-2023 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <https://www.gnu.org/licenses/>.  */
+
+#include <aliases.h>
+
+
+#define LOOKUP_TYPE		struct aliasent
+#define SETFUNC_NAME		setaliasent
+#define	GETFUNC_NAME		getaliasent
+#define	ENDFUNC_NAME		endaliasent
+#define DATABASE_NAME		aliases
+
+/* There is no nscd support for the aliases file.  */
+#undef	USE_NSCD
+
+#include "../nss/getXXent_r.c"
diff --git a/nss/getaliasname.c b/nss/getaliasname.c
new file mode 100644
index 0000000000..3687467fe2
--- /dev/null
+++ b/nss/getaliasname.c
@@ -0,0 +1,31 @@
+/* Copyright (C) 1996-2023 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <https://www.gnu.org/licenses/>.  */
+
+#include <aliases.h>
+
+
+#define LOOKUP_TYPE	struct aliasent
+#define FUNCTION_NAME	getaliasbyname
+#define DATABASE_NAME	aliases
+#define ADD_PARAMS	const char *name
+#define ADD_VARIABLES	name
+#define BUFLEN		1024
+
+/* There is no nscd support for the aliases file.  */
+#undef	USE_NSCD
+
+#include "../nss/getXXbyYY.c"
diff --git a/nss/getaliasname_r.c b/nss/getaliasname_r.c
new file mode 100644
index 0000000000..85f3d89006
--- /dev/null
+++ b/nss/getaliasname_r.c
@@ -0,0 +1,30 @@
+/* Copyright (C) 1996-2023 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <https://www.gnu.org/licenses/>.  */
+
+#include <aliases.h>
+
+
+#define LOOKUP_TYPE		struct aliasent
+#define FUNCTION_NAME		getaliasbyname
+#define DATABASE_NAME		aliases
+#define ADD_PARAMS		const char *name
+#define ADD_VARIABLES		name
+
+/* There is no nscd support for the aliases file.  */
+#undef	USE_NSCD
+
+#include "../nss/getXXbyYY_r.c"