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From 9980bf0b307368959cb29f3ca3f7446ad92347f1 Mon Sep 17 00:00:00 2001
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From: Florian Weimer <fweimer@redhat.com>
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Date: Thu, 16 Jul 2020 16:55:45 +0200
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Subject: [PATCH 04/11] nss_files: Use generic result pointer in parse_line
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As a result, all parse_line functions have the same prototype, except
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for that producing struct hostent.  This change is ABI-compatible, so
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it does not alter the internal GLIBC_PRIVATE ABI (otherwise we should
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probably have renamed the exported functions).
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A future change will use this to implement a generict fget*ent_r
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function.
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Tested-by: Carlos O'Donell <carlos@redhat.com>
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Reviewed-by: Carlos O'Donell <carlos@redhat.com>
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---
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 include/nss_files.h         | 48 ++++++++++++---------------------------------
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 nss/nss_files/files-parse.c |  5 +++--
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 2 files changed, 15 insertions(+), 38 deletions(-)
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diff --git a/include/nss_files.h b/include/nss_files.h
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index 54b354a..d0f2681 100644
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--- a/include/nss_files.h
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+++ b/include/nss_files.h
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@@ -26,45 +26,21 @@ FILE *__nss_files_fopen (const char *path);
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 libc_hidden_proto (__nss_files_fopen)
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 struct parser_data;
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-struct etherent;
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-struct group;
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-struct netent;
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-struct passwd;
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-struct protoent;
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-struct rpcent;
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-struct servent;
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-struct sgrp;
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-struct spwd;
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 /* Instances of the parse_line function from
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    nss/nss_files/files-parse.c.  */
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-extern int _nss_files_parse_etherent (char *line, struct etherent *result,
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-                                      struct parser_data *data,
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-                                      size_t datalen, int *errnop);
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-extern int _nss_files_parse_grent (char *line, struct group *result,
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-                                   struct parser_data *data,
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-                                   size_t datalen, int *errnop);
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-extern int _nss_files_parse_netent (char *line, struct netent *result,
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-                                    struct parser_data *data,
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-                                    size_t datalen, int *errnop);
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-extern int _nss_files_parse_protoent (char *line, struct protoent *result,
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-                                      struct parser_data *data,
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-                                      size_t datalen, int *errnop);
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-extern int _nss_files_parse_pwent (char *line, struct passwd *result,
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-                                   struct parser_data *data,
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-                                   size_t datalen, int *errnop);
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-extern int _nss_files_parse_rpcent (char *line, struct rpcent *result,
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-                                    struct parser_data *data,
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-                                    size_t datalen, int *errnop);
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-extern int _nss_files_parse_servent (char *line, struct servent *result,
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-                                     struct parser_data *data,
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-                                     size_t datalen, int *errnop);
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-extern int _nss_files_parse_sgent (char *line, struct sgrp *result,
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-                                   struct parser_data *data,
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-                                   size_t datalen, int *errnop);
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-extern int _nss_files_parse_spent (char *line, struct spwd *result,
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-                                   struct parser_data *data,
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-                                   size_t datalen, int *errnop);
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+typedef int nss_files_parse_line (char *line, void *result,
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+                                  struct parser_data *data,
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+                                  size_t datalen, int *errnop);
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+extern nss_files_parse_line _nss_files_parse_etherent;
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+extern nss_files_parse_line _nss_files_parse_grent;
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+extern nss_files_parse_line _nss_files_parse_netent;
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+extern nss_files_parse_line _nss_files_parse_protoent;
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+extern nss_files_parse_line _nss_files_parse_pwent;
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+extern nss_files_parse_line _nss_files_parse_rpcent;
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+extern nss_files_parse_line _nss_files_parse_servent;
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+extern nss_files_parse_line _nss_files_parse_sgent;
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+extern nss_files_parse_line _nss_files_parse_spent;
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 libnss_files_hidden_proto (_nss_files_parse_etherent)
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 libc_hidden_proto (_nss_files_parse_grent)
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diff --git a/nss/nss_files/files-parse.c b/nss/nss_files/files-parse.c
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index 3820287..c6cd43b 100644
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--- a/nss/nss_files/files-parse.c
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+++ b/nss/nss_files/files-parse.c
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@@ -87,7 +87,7 @@ struct parser_data
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 #ifdef EXTERN_PARSER
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 /* The parser is defined in a different module.  */
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-extern int parse_line (char *line, struct STRUCTURE *result,
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+extern int parse_line (char *line, void *result,
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 		       struct parser_data *data, size_t datalen, int *errnop
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 		       EXTRA_ARGS_DECL);
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@@ -99,10 +99,11 @@ extern int parse_line (char *line, struct STRUCTURE *result,
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 # define LINE_PARSER(EOLSET, BODY)					      \
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 parser_stclass int							      \
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-parse_line (char *line, struct STRUCTURE *result,			      \
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+parse_line (char *line, void *generic_result,				      \
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 	    struct parser_data *data, size_t datalen, int *errnop	      \
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 	    EXTRA_ARGS_DECL)						      \
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 {									      \
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+  struct STRUCTURE *result = generic_result;				      \
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   ENTDATA_DECL (data)							      \
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   BUFFER_PREPARE							      \
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   char *p = strpbrk (line, EOLSET "\n");				      \
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-- 
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1.8.3.1
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