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Add Pgadmin administration functions to /contrib/adminpack.

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Dave Page
REL8_2_STABLE
Bruce Momjian 20 years ago
parent 38c7700f56
commit fe59e56660
5 changed files with 497 additions and 3 deletions
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  1. 7
      contrib/README
  2. 15
      contrib/adminpack/Makefile
  3. 47
      contrib/adminpack/README.adminpack
  4. 390
      contrib/adminpack/adminpack.c
  5. 41
      contrib/adminpack/adminpack.sql.in

7
contrib/README
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@ -28,9 +28,10 @@ adddepend -
Add object dependency information to pre-7.3 objects. Add object dependency information to pre-7.3 objects.
by Rod Taylor <rbt@rbt.ca> by Rod Taylor <rbt@rbt.ca>
btree_gist - adminpack -
Support for emulating BTREE indexing in GiST File and log manipulation routines, used by Pgadmin
by Oleg Bartunov <oleg@sai.msu.su> and Teodor Sigaev <teodor@sigaev.ru> by From: Dave Page <dpage@vale-housing.co.uk>
chkpass - chkpass -
An auto-encrypted password datatype An auto-encrypted password datatype

15
contrib/adminpack/Makefile
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MODULE_big = adminpack
PG_CPPFLAGS = -I$(libpq_srcdir)
DATA_built = adminpack.sql
DOCS = README.adminpack
OBJS = adminpack.o
ifdef USE_PGXS
PGXS := $(shell pg_config --pgxs)
include $(PGXS)
else
subdir = contrib/adminpack
top_builddir = ../..
include $(top_builddir)/src/Makefile.global
include $(top_srcdir)/contrib/contrib-global.mk
endif

47
contrib/adminpack/README.adminpack
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PostgreSQL Administration Functions
===================================
This directory is a PostgreSQL 'contrib' module which implements a number of
support functions which pgAdmin and other administration and management tools
can use to provide additional functionality if installed on a server.
Installation
============
This module is normally distributed as a PostgreSQL 'contrib' module. To
install it from a pre-configured source tree run the following commands
as a user with appropriate privileges from the adminpack source directory:
make
make install
Alternatively, if you have a PostgreSQL 8.2 or higher installation but no
source tree you can install using PGXS. Simply run the following commands the
adminpack source directory:
make USE_PGXS=1
make USE_PGXS=1 install
pgAdmin will look for the functions in the Maintenance Database (usually
"postgres" for 8.2 servers) specified in the connection dialogue for the server.
To install the functions in the database, either run the adminpack.sql script
using the pgAdmin SQL tool (and then close and reopen the connection to the
freshly instrumented server), or run the script using psql, eg:
psql -U postgres postgres < adminpack.sql
Other administration tools that use this module may have different requirements,
please consult the tool's documentation for further details.
Objects implemented (superuser only)
====================================
int8 pg_catalog.pg_file_write(fname text, data text, append bool)
int8 pg_catalog.pg_file_read(fname text, data text, append bool)
bool pg_catalog.pg_file_rename(oldname text, newname text)
bool pg_catalog.pg_file_rename(oldname text, newname text, archivname text)
bool pg_catalog.pg_file_unlink(fname text)
bigint pg_catalog.pg_file_size(text)
int4 pg_catalog.pg_logfile_rotate()
setof record pg_catalog.pg_logdir_ls()

390
contrib/adminpack/adminpack.c
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/*-------------------------------------------------------------------------
*
* admin81.c
*
*
* Copyright (c) 2002 - 2006, PostgreSQL Global Development Group
*
* Author: Andreas Pflug <pgadmin@pse-consulting.de>
*
* IDENTIFICATION
* $PostgreSQL: pgsql/contrib/adminpack/adminpack.c,v 1.1 2006/05/30 12:07:31 momjian Exp $
*
*-------------------------------------------------------------------------
*/
#include "postgres.h"
#include <sys/file.h>
#include <sys/stat.h>
#include <unistd.h>
#include <dirent.h>
#include "miscadmin.h"
#include "storage/fd.h"
#include "catalog/pg_type.h"
#include "funcapi.h"
#include "utils/datetime.h"
#ifdef WIN32
#ifdef rename
#undef rename
#endif
#ifdef unlink
#undef unlink
#endif
#endif
extern DLLIMPORT char *DataDir;
extern DLLIMPORT char *Log_directory;
extern DLLIMPORT char *Log_filename;
Datum pg_file_write(PG_FUNCTION_ARGS);
Datum pg_file_rename(PG_FUNCTION_ARGS);
Datum pg_file_unlink(PG_FUNCTION_ARGS);
Datum pg_logdir_ls(PG_FUNCTION_ARGS);
PG_FUNCTION_INFO_V1(pg_file_write);
PG_FUNCTION_INFO_V1(pg_file_rename);
PG_FUNCTION_INFO_V1(pg_file_unlink);
PG_FUNCTION_INFO_V1(pg_logdir_ls);
typedef struct
{
char *location;
DIR *dirdesc;
} directory_fctx;
/*-----------------------
* some helper functions
*/
/*
* Return an absolute path. Argument may be absolute or
* relative to the DataDir.
*/
static char *absClusterPath(text *arg, bool logAllowed)
{
char *filename;
int len=VARSIZE(arg) - VARHDRSZ;
int dlen = strlen(DataDir);
filename = palloc(len+1);
memcpy(filename, VARDATA(arg), len);
filename[len] = 0;
if (strstr(filename, "..") != NULL)
ereport(ERROR,
(errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
(errmsg("No .. allowed in filenames"))));
if (is_absolute_path(filename))
{
if (logAllowed && !strncmp(filename, Log_directory, strlen(Log_directory)))
return filename;
if (strncmp(filename, DataDir, dlen))
ereport(ERROR,
(errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
(errmsg("Absolute path not allowed"))));
return filename;
}
else
{
char *absname = palloc(dlen+len+2);
sprintf(absname, "%s/%s", DataDir, filename);
pfree(filename);
return absname;
}
}
/*
* check for superuser, bark if not.
*/
static void
requireSuperuser(void)
{
if (!superuser())
ereport(ERROR,
(errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
(errmsg("only superuser may access generic file functions"))));
}
/* ------------------------------------
* generic file handling functions
*/
Datum pg_file_write(PG_FUNCTION_ARGS)
{
FILE *f;
char *filename;
text *data;
int64 count = 0;
requireSuperuser();
filename = absClusterPath(PG_GETARG_TEXT_P(0), false);
data = PG_GETARG_TEXT_P(1);
if (PG_ARGISNULL(2) || !PG_GETARG_BOOL(2))
{
struct stat fst;
if (stat(filename, &fst) >= 0)
ereport(ERROR,
(ERRCODE_DUPLICATE_FILE,
errmsg("file %s exists", filename)));
f = fopen(filename, "wb");
}
else
f = fopen(filename, "ab");
if (!f)
{
ereport(ERROR,
(errcode_for_file_access(),
errmsg("could open file %s for writing: %m", filename)));
}
if (VARSIZE(data) != 0)
{
count = fwrite(VARDATA(data), 1, VARSIZE(data) - VARHDRSZ, f);
if (count != VARSIZE(data) - VARHDRSZ)
ereport(ERROR,
(errcode_for_file_access(),
errmsg("error writing file %s: %m", filename)));
}
fclose(f);
PG_RETURN_INT64(count);
}
Datum pg_file_rename(PG_FUNCTION_ARGS)
{
char *fn1, *fn2, *fn3;
int rc;
requireSuperuser();
if (PG_ARGISNULL(0) || PG_ARGISNULL(1))
PG_RETURN_NULL();
fn1=absClusterPath(PG_GETARG_TEXT_P(0), false);
fn2=absClusterPath(PG_GETARG_TEXT_P(1), false);
if (PG_ARGISNULL(2))
fn3=0;
else
fn3=absClusterPath(PG_GETARG_TEXT_P(2), false);
if (access(fn1, W_OK) < 0)
{
ereport(WARNING,
(errcode_for_file_access(),
errmsg("file %s not accessible: %m", fn1)));
PG_RETURN_BOOL(false);
}
if (fn3 && access(fn2, W_OK) < 0)
{
ereport(WARNING,
(errcode_for_file_access(),
errmsg("file %s not accessible: %m", fn2)));
PG_RETURN_BOOL(false);
}
rc = access(fn3 ? fn3 : fn2, 2);
if (rc >= 0 || errno != ENOENT)
{
ereport(ERROR,
(ERRCODE_DUPLICATE_FILE,
errmsg("cannot rename to target file %s", fn3 ? fn3 : fn2)));
}
if (fn3)
{
if (rename(fn2, fn3) != 0)
{
ereport(ERROR,
(errcode_for_file_access(),
errmsg("could not rename %s to %s: %m", fn2, fn3)));
}
if (rename(fn1, fn2) != 0)
{
ereport(WARNING,
(errcode_for_file_access(),
errmsg("could not rename %s to %s: %m", fn1, fn2)));
if (rename(fn3, fn2) != 0)
{
ereport(ERROR,
(errcode_for_file_access(),
errmsg("could not rename %s back to %s: %m", fn3, fn2)));
}
else
{
ereport(ERROR,
(ERRCODE_UNDEFINED_FILE,
errmsg("renaming %s to %s was reverted", fn2, fn3)));
}
}
}
else if (rename(fn1, fn2) != 0)
{
ereport(WARNING,
(errcode_for_file_access(),
errmsg("renaming %s to %s %m", fn1, fn2)));
ereport(ERROR,
(errcode_for_file_access(),
errmsg("could not rename %s to %s: %m", fn1, fn2)));
}
PG_RETURN_BOOL(true);
}
Datum pg_file_unlink(PG_FUNCTION_ARGS)
{
char *filename;
requireSuperuser();
filename = absClusterPath(PG_GETARG_TEXT_P(0), false);
if (access(filename, W_OK) < 0)
{
if (errno == ENOENT)
PG_RETURN_BOOL(false);
else
ereport(ERROR,
(errcode_for_file_access(),
errmsg("file %s not accessible: %m", filename)));
}
if (unlink(filename) < 0)
{
ereport(WARNING,
(errcode_for_file_access(),
errmsg("could not unlink file %s: %m", filename)));
PG_RETURN_BOOL(false);
}
PG_RETURN_BOOL(true);
}
Datum pg_logdir_ls(PG_FUNCTION_ARGS)
{
FuncCallContext *funcctx;
struct dirent *de;
directory_fctx *fctx;
if (!superuser())
ereport(ERROR,
(errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
(errmsg("only superuser can list the log directory"))));
if (memcmp(Log_filename, "postgresql-%Y-%m-%d_%H%M%S.log", 30) != 0)
ereport(ERROR,
(errcode(ERRCODE_INVALID_PARAMETER_VALUE),
(errmsg("the log_filename parameter must equal 'postgresql-%%Y-%%m-%%d_%%H%%M%%S.log'"))));
if (SRF_IS_FIRSTCALL())
{
MemoryContext oldcontext;
TupleDesc tupdesc;
funcctx=SRF_FIRSTCALL_INIT();
oldcontext = MemoryContextSwitchTo(funcctx->multi_call_memory_ctx);
fctx = palloc(sizeof(directory_fctx));
if (is_absolute_path(Log_directory))
fctx->location = Log_directory;
else
{
fctx->location = palloc(strlen(DataDir) + strlen(Log_directory) +2);
sprintf(fctx->location, "%s/%s", DataDir, Log_directory);
}
tupdesc = CreateTemplateTupleDesc(2, false);
TupleDescInitEntry(tupdesc, (AttrNumber) 1, "starttime",
TIMESTAMPOID, -1, 0);
TupleDescInitEntry(tupdesc, (AttrNumber) 2, "filename",
TEXTOID, -1, 0);
funcctx->attinmeta = TupleDescGetAttInMetadata(tupdesc);
fctx->dirdesc = AllocateDir(fctx->location);
if (!fctx->dirdesc)
ereport(ERROR,
(errcode_for_file_access(),
errmsg("%s is not browsable: %m", fctx->location)));
funcctx->user_fctx = fctx;
MemoryContextSwitchTo(oldcontext);
}
funcctx=SRF_PERCALL_SETUP();
fctx = (directory_fctx*) funcctx->user_fctx;
if (!fctx->dirdesc) /* not a readable directory */
SRF_RETURN_DONE(funcctx);
while ((de = readdir(fctx->dirdesc)) != NULL)
{
char *values[2];
HeapTuple tuple;
char *field[MAXDATEFIELDS];
char lowstr[MAXDATELEN + 1];
int dtype;
int nf, ftype[MAXDATEFIELDS];
fsec_t fsec;
int tz = 0;
struct pg_tm date;
/*
* Default format:
* postgresql-YYYY-MM-DD_HHMMSS.log
*/
if (strlen(de->d_name) != 32
|| memcmp(de->d_name, "postgresql-", 11)
|| de->d_name[21] != '_'
|| strcmp(de->d_name + 28, ".log"))
continue;
values[1] = palloc(strlen(fctx->location) + strlen(de->d_name) + 2);
sprintf(values[1], "%s/%s", fctx->location, de->d_name);
values[0] = de->d_name + 11; /* timestamp */
values[0][17] = 0;
/* parse and decode expected timestamp */
if (ParseDateTime(values[0], lowstr, MAXDATELEN, field, ftype, MAXDATEFIELDS, &nf))
continue;
if (DecodeDateTime(field, ftype, nf, &dtype, &date, &fsec, &tz))
continue;
/* Seems the format fits the expected format; feed it into the tuple */
tuple = BuildTupleFromCStrings(funcctx->attinmeta, values);
SRF_RETURN_NEXT(funcctx, HeapTupleGetDatum(tuple));
}
FreeDir(fctx->dirdesc);
SRF_RETURN_DONE(funcctx);
}

41
contrib/adminpack/adminpack.sql.in
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/* ***********************************************
* Administrative functions for PostgreSQL
* *********************************************** */
/* generic file access functions */
CREATE FUNCTION pg_catalog.pg_file_write(text, text, bool) RETURNS bigint
AS 'MODULE_PATHNAME', 'pg_file_write'
LANGUAGE C VOLATILE STRICT;
CREATE FUNCTION pg_catalog.pg_file_rename(text, text, text) RETURNS bool
AS 'MODULE_PATHNAME', 'pg_file_rename'
LANGUAGE C VOLATILE;
CREATE FUNCTION pg_catalog.pg_file_unlink(text) RETURNS bool
AS 'MODULE_PATHNAME', 'pg_file_unlink'
LANGUAGE C VOLATILE STRICT;
CREATE FUNCTION pg_catalog.pg_file_rename(text, text) RETURNS bool
AS 'SELECT pg_file_rename($1, $2, NULL); '
LANGUAGE SQL VOLATILE STRICT;
CREATE FUNCTION pg_catalog.pg_logdir_ls() RETURNS setof record
AS 'MODULE_PATHNAME', 'pg_logdir_ls'
LANGUAGE C VOLATILE STRICT;
/* compatibility redefines */
CREATE FUNCTION pg_catalog.pg_logfile_rotate() RETURNS int4
AS 'pg_rotate_logfile'
LANGUAGE INTERNAL VOLATILE STRICT;
CREATE FUNCTION pg_catalog.pg_file_read(text, bigint, bigint) RETURNS text
AS 'pg_read_file'
LANGUAGE INTERNAL VOLATILE STRICT;
CREATE FUNCTION pg_catalog.pg_file_length(text) RETURNS bigint
AS 'SELECT size FROM pg_stat_file($1)'
LANGUAGE SQL VOLATILE STRICT;
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