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Refactor dir/file permissions

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Consolidate directory and file create permissions for tools which work
with the PG data directory by adding a new module (common/file_perm.c)
that contains variables (pg_file_create_mode, pg_dir_create_mode) and
constants to initialize them (0600 for files and 0700 for directories).

Convert mkdir() calls in the backend to MakePGDirectory() if the
original call used default permissions (always the case for regular PG
directories).

Add tests to make sure permissions in PGDATA are set correctly by the
tools which modify the PG data directory.

Authors: David Steele <david@pgmasters.net>,
         Adam Brightwell <adam.brightwell@crunchydata.com>
Reviewed-By: Michael Paquier, with discussion amongst many others.
Discussion: https://postgr.es/m/ad346fe6-b23e-59f1-ecb7-0e08390ad629%40pgmasters.net
This commit is contained in:
Stephen Frost
2018-04-07 17:45:39 -04:00
parent 499be013de
commit da9b580d89
34 changed files with 330 additions and 75 deletions
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4
src/common/Makefile
View File

@@ -40,8 +40,8 @@ override CPPFLAGS += -DVAL_LIBS="\"$(LIBS)\""
override CPPFLAGS := -DFRONTEND $(CPPFLAGS)
LIBS += $(PTHREAD_LIBS)
OBJS_COMMON = base64.o config_info.o controldata_utils.o exec.o ip.o \
keywords.o md5.o pg_lzcompress.o pgfnames.o psprintf.o relpath.o \
OBJS_COMMON = base64.o config_info.o controldata_utils.o exec.o file_perm.o \
ip.o keywords.o md5.o pg_lzcompress.o pgfnames.o psprintf.o relpath.o \
rmtree.o saslprep.o scram-common.o string.o unicode_norm.o \
username.o wait_error.o

19
src/common/file_perm.c Normal file
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@@ -0,0 +1,19 @@
/*-------------------------------------------------------------------------
*
* File and directory permission routines
*
*
* Portions Copyright (c) 1996-2018, PostgreSQL Global Development Group
* Portions Copyright (c) 1994, Regents of the University of California
*
* src/include/common/file_perm.c
*
*-------------------------------------------------------------------------
*/
#include <sys/stat.h>
#include "common/file_perm.h"
/* Modes for creating directories and files in the data directory */
int pg_dir_create_mode = PG_DIR_MODE_OWNER;
int pg_file_create_mode = PG_FILE_MODE_OWNER;