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pgsqllib.c
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pgsqllib.c
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/*
* Copyright (c) 2013 by Inteos sp. z o.o.
* All rights reserved. See LICENSE.pgsql for details.
*
* Common utility functions for pgsql plugin.
* Functions defines a common framework used in all utilities and plugins
*/
/*
TODO:
* more framework integration with pgsql-fd plugin
* change framework name and some functions into pluglib
* add functions for mysql and oracle databases
* prepare a docummentation about plugin
*/
#include <stdio.h>
#include <ctype.h>
#include <unistd.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <errno.h>
#include <libgen.h>
#include <sys/types.h>
#include <sys/ipc.h>
#include <sys/msg.h>
#include "config.h"
#include "pgsqllib.h"
/* variables required for application named messages */
static char * program_name = NULL;
static char * program_directory = NULL;
/*
* library initialization function
* in:
* argc, argv - application envinronment variables
*/
/*
* curently it assigns argv[0] into program_name variable only, future enchancement possible
*/
void pgsqllibinit ( int argc, char * argv[] ){
char * prg;
char * nprg;
char * dirtmp;
prg = bstrdup ( argv[0] );
nprg = basename ( prg );
program_name = bstrdup ( nprg );
FREE ( prg );
dirtmp = MALLOC ( PATH_MAX );
if ( realpath ( argv[0], dirtmp ) == NULL ){
/* error in resolving path */
FREE ( dirtmp );
dirtmp = argv[0];
}
program_directory = bstrdup ( dirtmp );
FREE ( dirtmp );
}
/* returns a pointer into program name variable */
char * get_program_name ( void ){
return program_name;
}
/* returns a pointer into a stored full pathname of program name */
char * get_program_directory ( void ){
return program_directory;
}
/* allocates and resets a main program data variable */
pgsqldata * allocpdata ( void ){
pgsqldata * pdata;
pdata = (pgsqldata *) malloc ( sizeof ( pgsqldata ) );
memset ( pdata, 0, sizeof ( pgsqldata ) );
return pdata;
}
/* releases all allocated program data resources */
void freepdata ( pgsqldata * pdata ){
keylist_free ( pdata->paramlist );
if ( pdata->configfile )
FREE ( pdata->configfile );
if ( pdata->walfilename )
FREE ( pdata->walfilename );
if ( pdata->pathtowalfilename )
FREE ( pdata->pathtowalfilename );
if ( pdata->where )
FREE ( pdata->where );
if ( pdata->restoreclient )
FREE ( pdata->restoreclient );
free ( pdata );
}
/* allocated and resets a main plugin instance variable */
pgsqlpinst * allocpinst ( void ){
pgsqlpinst * pinst;
pinst = (pgsqlpinst *) malloc ( sizeof( pgsqlpinst ) );
if ( pinst == NULL ){
return NULL;
}
/* initialize pinst contents */
memset ( pinst, 0, sizeof ( pgsqlpinst ) );
pinst->JobId = -1;
pinst->mode = PGSQL_NONE;
return pinst;
}
/* releases all allocated plugin instance resources */
void freepinst ( pgsqlpinst * pinst ){
if ( pinst->configfile )
FREE ( pinst->configfile );
if ( pinst->linkval )
FREE ( pinst->linkval );
keylist_free ( pinst->paramlist );
keylist_free ( pinst->filelist );
free ( pinst );
}
/*
* logstr - render head of log string into msg. return msg. msg have to be at least LOGMSGLEN
* long.
* level: [LOGERROR, LOGWARNING, LOGINFO]
*/
char * logstr ( char * msg, LOG_LEVEL_T level ){
time_t t;
char * lvl;
char mtime[ 24 + 1 ];
/*
* msg in format: '%date %level: %program_name: ' = 6 chars
* %program_name no more then 32 chars
* %level as follows: '[ERROR|WARNING|INFO]' = max 7 chars
* %date as follows: 'YYYY-MM-DD HH:MM:SS TTZZ' = 24 chars
* + '\0'
*/
/* if msg == NULL, there is no place to render log message */
if ( !msg )
return NULL;
/* current time */
time ( &t );
/* render current time in required format into msg */
strftime ( mtime, LOGMSGLEN, "%F %T %Z", localtime ( &t ) );
/* choose log level string */
switch (level){
case LOGERROR:
lvl = (char *) "ERROR";
break;
case LOGWARNING:
lvl = (char *) "WARNING";
break;
case LOGINFO:
lvl = (char *) "INFO";
break;
default:
lvl = (char *) "Unknown";
}
/* render all info into msg: '%date %level: %program_name: ' */
snprintf ( msg, LOGMSGLEN, "%s %s: %s: ", mtime, lvl, program_name );
return msg;
}
/*
* logprg prints msg at log level of level
*
* in:
* level - a level number consisted with LOG_LEVEL_T
* msg - a log message
* out:
* log displayed on stdout
*/
void logprg ( LOG_LEVEL_T level, const char * msg ){
char s[LOGMSGLEN];
char * copy;
char * start = (char *)msg;
char * end;
logstr ( s, level );
/* first we search for end line characters */
end = strchr ( start, '\n' );
if ( end ){
/* if found we need to erase them */
copy = MALLOC ( strlen ( msg ) + 1 );
while ( ( end = strchr ( start, '\n' )) ){
/* end line chars erase */
if ( start != end ){
strncpy ( copy, start, end - start );
copy [ end - start ] = '\0';
printf ( "%s %s\n", s, copy );
}
start = end + 1;
}
FREE ( copy );
} else {
/* if not found simply display it */
printf ( "%s %s\n", s, msg );
}
}
/*
* abortprg prints msg at a log level of LOGERROR and exits program with error code of err.
*
* in:
* pdata - main program data
* err - error code
* msg - error message
* out:
* program abort and exit
*/
void abortprg ( pgsqldata * pdata, int err, const char * msg ){
char h[LOGMSGLEN];
/* Program aborting always generate ERROR message */
logstr ( h, LOGERROR );
printf ( "%s %s\n", h, msg );
printf ( "%s Aborting!\n", h );
if ( pdata->catdb )
PQfinish ( pdata->catdb );
freepdata ( pdata );
exit (err);
}
/*
* checking for plugin schema version
* in:
* db - database connection handle
* version - required schema version
* out
* 1 - schema version match
* 0 - schema version invalid or error
*/
int check_schema_version ( PGconn * db, int version ){
PGresult * result;
int pver;
result = PQexec ( db, "select versionid from pgsql_version" );
if ( PQresultStatus ( result ) != PGRES_TUPLES_OK ){
logprg ( LOGERROR, "CATDB: SQL Exec error!" );
return 0;
}
if ( PQntuples ( result ) ){
pver = atoi ((char *) PQgetvalue ( result, 0, PQfnumber ( result, "versionid") ));
} else {
logprg ( LOGERROR, "CATDB: No schema version!" );
return 0;
}
if ( pver == version ){
return 1;
} else {
return 0;
}
}
/*
* connect to pgsql catalog database
*
* in:
* paramlist - list of parameters from config file
* required params: CATDBHOST, CATDBPORT, CATDB, CATUSER, CATPASSWD
* out:
* on success: PGconn * - working catalog connection
* on error: NULL
*/
PGconn * catdbconnect ( keylist * paramlist ){
char * catdbconnstring = NULL;
PGconn * conndb = NULL;
ConnStatusType status;
catdbconnstring = MALLOC ( CONNSTRLEN );
ASSERT_NVAL_RET_NULL ( catdbconnstring );
snprintf ( catdbconnstring, CONNSTRLEN, "host=%s port=%s dbname=%s user=%s password=%s",
search_key ( paramlist, "CATDBHOST" ),
search_key ( paramlist, "CATDBPORT" ),
search_key ( paramlist, "CATDB" ),
search_key ( paramlist, "CATUSER" ),
search_key ( paramlist, "CATPASSWD" ));
conndb = PQconnectdb ( catdbconnstring );
FREE ( catdbconnstring );
status = PQstatus ( conndb );
if ( status == CONNECTION_BAD ){
logprg ( LOGERROR, PQerrorMessage( conndb ) );
PQfinish ( conndb );
return NULL;
}
/* check for schema version number */
if ( !check_schema_version ( conndb, 1 )){
printf ( "Schema version error\n" );
}
return conndb;
}
/*
* parse configfile, if invalid config found, setup defaults
*
* in:
* configfile - path and name of the pgsql.conf file
* out:
* keylist of parameters
*/
keylist * parse_pgsql_conf ( char * configfile ){
keylist * paramlist;
paramlist = parse_config_file ( configfile );
if ( ! paramlist ){
logprg ( LOGINFO, "Config file not found, using defaults." );
}
if ( ! search_key ( paramlist, "CATDB" ) )
paramlist = add_keylist ( paramlist, "CATDB", "catdb" );
if ( ! search_key ( paramlist, "CATDBHOST" ) )
paramlist = add_keylist ( paramlist, "CATDBHOST", "localhost" );
if ( ! search_key ( paramlist, "CATDBPORT" ) )
paramlist = add_keylist ( paramlist, "CATDBPORT", "5432" );
if ( ! search_key ( paramlist, "CATUSER" ) )
paramlist = add_keylist ( paramlist, "CATUSER", "catdbuser" );
if ( ! search_key ( paramlist, "CATPASSWD" ) )
paramlist = add_keylist ( paramlist, "CATPASSWD", "catdpasswd" );
if ( ! search_key ( paramlist, "ARCHDEST" ) )
paramlist = add_keylist ( paramlist, "ARCHDEST", "/tmp" );
if ( ! search_key ( paramlist, "ARCHCLIENT" ) )
paramlist = add_keylist ( paramlist, "ARCHCLIENT", "catdb" );
if ( ! search_key ( paramlist, "DIRNAME" ) )
paramlist = add_keylist ( paramlist, "DIRNAME", "director" );
if ( ! search_key ( paramlist, "DIRHOST" ) )
paramlist = add_keylist ( paramlist, "DIRHOST", "localhost" );
if ( ! search_key ( paramlist, "DIRPORT" ) )
paramlist = add_keylist ( paramlist, "DIRPORT", "9101" );
if ( ! search_key ( paramlist, "DIRPASSWD" ) )
paramlist = add_keylist ( paramlist, "DIRPASSWD", "dirpasswd" );
return paramlist;
}
#if 0
/* XXX: function integration from pgsql-fd.c */
/* perform an internal connection to the database in separate process and execute sql
* statement */
bRC pg_internal_conn ( bpContext *ctx, const char * sql ){
PGconn * db;
ConnStatusType status;
PGresult * result;
int pid = 0;
struct stat st;
uid_t pguid;
int err;
char connstring[CONNSTRLEN];
pgsqlpinst * pinst;
bRC exitstatus = bRC_OK;
/* check input data */
ASSERT_ctx_p;
pinst = (pgsqlpinst *)ctx->pContext;
/* dynamic production database owner verification, we use it do connect to production
* database. Required PGDATA from config file */
ASSERT_p ( pinst->paramlist );
err = stat ( search_key ( pinst->paramlist, "PGDATA" ) , &st );
if ( err ){
/* error, invalid PGDATA in config file */
//FIXME printf ( PLUGIN_INFO "invalid 'PGDATA' variable in config file.\n" );
return bRC_Error;
}
/* we will fork to the owner of PGDATA database cluster */
pguid = st.st_uid;
/* switch pg xlog in different process, so make a fork */
pid = fork ();
if ( pid == 0 ){
// printf ( PLUGIN_INFO "forked process\n" );
/* sleep used for debuging forked process in gdb */
// sleep ( 60 );
/* we are in forked process, do a real job */
/* switch to pgcluster owner (postgres) */
err = seteuid ( pguid );
if ( err ){
/* error switching uid, report a problem */
/* TODO: add an errorlog display */
//FIXME printf ( PLUGIN_INFO "seteuid to uid=%i failed!\n", pguid );
exit (bRC_Error);
}
/* host is a socket directory, port is a socket 'port', we perform an 'internal'
* connection through a postgresql socket, which is required by plugin */
snprintf ( connstring, CONNSTRLEN, "host=%s port=%s",
search_key ( pinst->paramlist, "PGHOST" ),
search_key ( pinst->paramlist, "PGPORT" ) );
db = PQconnectdb ( connstring );
status = PQstatus ( db );
if ( status == CONNECTION_BAD ){
/* TODO: add an errorlog display */
//FIXME printf ( PLUGIN_INFO "conndb failed!\n");
exit (bRC_Error);
}
/* we have a successful production database connection, so execute sql */
result = PQexec ( db, sql );
if ( PQresultStatus ( result ) != PGRES_TUPLES_OK ){
/* TODO: add an errorlog display */
//FIXME printf ( PLUGIN_INFO "pg_internal_conn failed! (%s)\n", sql);
exit (bRC_Error);
}
/* finish database connection */
PQfinish ( db );
/* finish forked process */
exit (bRC_OK);
} else {
/* we are waiting for background process to finish */
waitpid ( pid, (int*)&exitstatus, 0 );
}
/* XXX: we should check for forked process exit status */
return exitstatus;
}
#endif
/*
* recurence function for building file list
*
* in:
* list - current filename list
* base - indicate if filename path is relative or absolute
* '$ROOT$' - path is absolute, no need to concatenate both
* other => absolute filename path = $base/$path
* path - filename path (file or directory)
* out:
* list->key - full pathname to backup file
* list->value - relative filename
*/
keylist * get_file_list ( keylist * list, const char * base, const char * path ){
int err;
struct stat st;
DIR * dirp;
DIR * dirp_tab;
char * npath = NULL;
char * bpath = NULL;
char * link = NULL;
keylist * nlist = list;
struct dirent * filedir;
struct dirent * filedir_tab;
int dl;
int plen = strlen ( path );
bpath = MALLOC ( PATH_MAX );
if ( ! bpath )
return list;
if ( strncmp ( base, "$ROOT$", PATH_MAX ) == 0 ){
/* indicate a path variable include absolute filename path */
strncpy ( bpath, path, PATH_MAX );
} else {
/* bpath has a real and absolute path into a filename as $base/$path,
* path has a relative filename path
* first concatenate a path for normalise */
snprintf ( bpath, PATH_MAX, "%s/%s",
base, path );
}
/* bpath has a full path for analized filename/directory */
err = lstat ( bpath, &st );
if ( err ){
printf ( "stat error on %s.\n", path );
FREE ( bpath );
return list;
}
if ( S_ISDIR (st.st_mode) ){
// printf ( "found: %s\n", bpath );
// printf ( "add dir to the list\n" );
if ( strncmp ( base, "$ROOT$", PATH_MAX ) == 0 ){
nlist = add_keylist_attr ( nlist, base, bpath, PG_DIR );
} else {
//nlist = add_keylist ( nlist, bpath, plen ? path : "$BASE$" );
nlist = add_keylist_attr ( nlist, bpath, path, PG_DIR );
}
dirp = opendir ( bpath );
if ( !dirp ){
FREE ( bpath );
return nlist;
}
while ( ( filedir = readdir ( dirp ) ) ){
/* check for tablespaces when path is empty and base has a absolute path */
if ( strcmp ( filedir->d_name, "pg_tblspc" ) == 0 && plen == 0 ){
/* add all tablespaces into a list */
nlist = get_file_list ( nlist, base, "pg_tblspc" );
/* building an absolute path for base variable */
snprintf ( bpath, PATH_MAX, "%s/pg_tblspc", base );
dirp_tab = opendir ( bpath );
if ( !dirp_tab ){
FREE ( bpath );
return nlist;
}
/* all tablespaces are symbolic links into a destination location */
while ( (filedir_tab = readdir ( dirp_tab )) ){
if ( strcmp ( filedir_tab->d_name, "." ) != 0 &&
strcmp ( filedir_tab->d_name, ".." ) != 0 ){
// printf ("tablespace found: %s\n", filedir_tab->d_name );
link = MALLOC ( PATH_MAX );
if ( ! link ){
FREE ( bpath );
return nlist;
}
/* building an absolute path for a link */
snprintf ( bpath, PATH_MAX, "%s/pg_tblspc/%s",
base, filedir_tab->d_name );
dl = readlink ( bpath, link, PATH_MAX - 1 );
if ( dl < 0 ){
printf ("ERR: %s\n", strerror ( errno ) );
FREE ( bpath );
FREE ( link );
closedir ( dirp_tab );
return nlist;
}
link [ dl ] = 0;
// printf ( "dl %i, %s\n", dl, link );
/* check if link is absolute or not */
if ( link [ 0 ] == '/' ){
strncpy ( bpath, link, PATH_MAX );
} else {
/* according to PostgreSQL a tablespace location has to be an absolute,
* if not we have an error, raise it. */
printf ( "Relative link Error!\n" );
FREE ( bpath );
FREE ( link );
closedir ( dirp_tab );
return nlist;
//snprintf ( bpath, PATH_MAX, "%s/pg_tblspc/%s",
// base, link );
}
/* all tablespaces are backuped with absolute path */
link = realpath ( bpath, link );
// printf ( "filelink %s\n", link );
nlist = get_file_list ( nlist, "$ROOT$", link );
FREE ( link );
}
}
closedir ( dirp_tab );
} else {
// printf ("found: %s\n", filedir->d_name );
if ( strcmp ( filedir->d_name, "." ) != 0 &&
strcmp ( filedir->d_name, ".." ) != 0 &&
strcmp ( filedir->d_name, "pg_xlog" ) != 0
){
npath = MALLOC ( PATH_MAX );
snprintf ( npath, PATH_MAX, plen ? "%s/%s" : "%s%s",
path, filedir->d_name );
nlist = get_file_list ( nlist, base, npath );
FREE ( npath );
} else {
// printf ("ignored\n");
}
}
}
closedir ( dirp );
} else
if ( S_ISLNK ( st.st_mode ) ){
/* indicate filetype of link */
if ( strncmp ( base, "$ROOT$", PATH_MAX ) == 0 ){
nlist = add_keylist_attr ( nlist, base, path, PG_LINK );
} else {
nlist = add_keylist_attr ( nlist, bpath, path, PG_LINK );
}
} else
if ( S_ISREG ( st.st_mode ) ){
/* indicate filetype of regular file */
if ( strncmp ( base, "$ROOT$", PATH_MAX ) == 0 ){
nlist = add_keylist_attr ( nlist, base, path, PG_FILE );
} else {
nlist = add_keylist_attr ( nlist, bpath, path, PG_FILE );
}
}
FREE ( bpath );
return nlist;
}
/*
* searches at catdb for rowid of input data
*
* in:
* pdata->paramlist,"ARCHCLIENT"
* pdata->walfilename
* out:
* >= 0 - vaule of id for selected wal and client
* < 0 - value not found
*/
int _get_walid_from_catalog ( pgsqldata * pdata ){
int pgid = -1;
char * sql;
PGresult * result;
sql = MALLOC ( SQLLEN );
snprintf ( sql, SQLLEN, "select id from pgsql_archivelogs where client='%s' and filename='%s'",
search_key ( pdata->paramlist, "ARCHCLIENT" ),
pdata->walfilename );
result = PQexec ( pdata->catdb, sql );
FREE ( sql );
if ( PQresultStatus ( result ) != PGRES_TUPLES_OK ){
abortprg ( pdata, 6, "CATDB: SQL Exec error!" );
}
if ( PQntuples ( result ) ){
/* we found a row and pgid will be a primary key of the row */
pgid = atoi ((char *) PQgetvalue ( result, 0, PQfnumber ( result, "id") ));
}
return pgid;
}
/*
* searches at catdb for rowid of input data
*
* in:
* pdata->paramlist,"ARCHCLIENT"
* pdata->walfilename
* out:
* >= 0 - on success, status vaule for selected wal and client
* < 0 - value not found or error
*/
int _get_walstatus_from_catalog ( pgsqldata * pdata ){
int pgstatus = -1;
char * sql;
PGresult * result;
sql = MALLOC ( SQLLEN );
snprintf ( sql, SQLLEN, "select status from pgsql_archivelogs where client='%s' and filename='%s'",
search_key ( pdata->paramlist, "ARCHCLIENT" ),
pdata->walfilename );
result = PQexec ( pdata->catdb, sql );
FREE ( sql );
if ( PQresultStatus ( result ) != PGRES_TUPLES_OK ){
return -1;
}
if ( PQntuples ( result ) ){
/* we found a row and pgid will be a primary key of the row */
pgstatus = atoi ((char *) PQgetvalue ( result, 0, PQfnumber ( result, "status") ));
}
return pgstatus;
}
/*
* inserts a status value into a catalog
*
* in:
* pdata->paramlist,"ARCHCLIENT"
* pdata->walfilename
* status - status number to insert into catdb
* out:
* pgid - id of inserted row
* >= 0 - on success, vaule of id for selected wal and client
* < 0 - on error
*/
int _insert_status_in_catalog ( pgsqldata * pdata, int status ){
char * sql;
PGresult * result;
int pgid;
sql = MALLOC ( SQLLEN );
/* insert status in catalog */
snprintf ( sql, SQLLEN, "insert into pgsql_archivelogs (client, filename, status) values ('%s', '%s', '%i')",
search_key ( pdata->paramlist, "ARCHCLIENT" ),
pdata->walfilename, status );
result = PQexec ( pdata->catdb, sql );
FREE ( sql );
if ( PQresultStatus ( result ) != PGRES_COMMAND_OK ){
return -1;
}
pgid = _get_walid_from_catalog ( pdata );
return pgid;
}
/*
* updates a status column onto a catalog
*
* input:
* pdata - primary data
* pgid - pgsql_archivelog ID for updating
* status - status number to update on catdb
* output:
* 0 - on success
* 1 - on error
*/
int _update_status_in_catalog ( pgsqldata * pdata, int pgid, int status ){
char * sql;
PGresult * result;
sql = MALLOC ( SQLLEN );
/* update status in catalog */
snprintf ( sql, SQLLEN, "update pgsql_archivelogs set status = '%i', mod_date = now() where id='%i'",
status, pgid );
result = PQexec ( pdata->catdb, sql );
FREE ( sql );
if ( PQresultStatus ( result ) != PGRES_COMMAND_OK ){
return 1;
}
return 0;
}
/*
* perform wal file copy from pdata->pathtowalfilename into
* $ARCHDEST/pdata->walfilename
* copy is performed by reading wal file into memory buffer and wrining it into newly
* created file
*
* in:
* pdata - primary data
* out:
* 0 - success
* 1 - error
*/
int _copy_wal_file ( pgsqldata * pdata, char * src, char * dst ){
int fdsrc, fddst;
int err;
struct stat file_stat;
void * filebuf;
fddst = open ( dst, O_WRONLY | O_CREAT, S_IRUSR | S_IWUSR );
if ( fddst < 0 ){
logprg ( LOGERROR, "Destination WAL access problem:" );
logprg ( LOGERROR, strerror ( errno ) );
return 1;
}
err = stat ( src, &file_stat );
if ( err ) {
close ( fddst );
return 1;
}
fdsrc = open ( src, O_RDONLY );
if ( fdsrc < 0 ){
close ( fddst );
return 1;
}
/* TODO: check if mmaping a file instead of read/write will be more efective */
filebuf = malloc ( file_stat.st_size );
if ( ! filebuf ){
close ( fddst );
close ( fdsrc );
return 1;
}
err = read ( fdsrc, filebuf, file_stat.st_size );
if ( err != file_stat.st_size ){
close ( fddst );
close ( fdsrc );
FREE ( filebuf );
return 1;
}
err = write ( fddst, filebuf, file_stat.st_size );
if ( err != file_stat.st_size ){
FREE ( filebuf );
close ( fddst );
close ( fdsrc );
return 1;
}
FREE ( filebuf );
close ( fddst );
close ( fdsrc );
err = chown ( dst, file_stat.st_uid, file_stat.st_gid );
return 0;
}
/*
* checks if PostgreSQL instance is running
*
* in:
* pdata - program data
* pgdataloc - PGDATA location
* out:
* 1 - is running
* 0 - is not running
* -1 - error
*/
int _check_postgres_is_running ( pgsqldata * pdata, char * pgdataloc ){
int pidfd;
int err;
int pid;
int out;
char * pidcont;
char * buf;
int rc = 0;
struct stat st;
buf = MALLOC ( BUFLEN );
ASSERT_NVAL_RET_NONE ( buf );
pidcont = MALLOC ( 64 );
ASSERT_NVAL_RET_NONE ( pidcont );
snprintf ( buf, BUFLEN, "%s/postmaster.pid", pgdataloc );
err = stat ( buf, &st );
ASSERT_VAL_RET_NONE ( err );
pidfd = open ( buf, O_RDONLY );
if ( pidfd > 0 ){
/* file exist, check if postmaster is running on that pid, if so
* read contents (pid number encoded as ascii number) */
err = read ( pidfd, pidcont, 64 );
if ( err > 2 ){
/* minimal valid file found, fd no longer needed */
close ( pidfd );
/* check for pid number in the first line of the file */
out = sscanf ( pidcont, "%i\n", &pid );
if ( out == 1 ){
/* valid pid number found, check process existence */
//printf ( "PID %i\n", pid );
snprintf ( buf, BUFLEN, "/proc/%i/status", pid );
pidfd = open ( buf, O_RDONLY );
if ( pidfd > 0 ){
close ( pidfd );
rc = 1;
}
}
}
}
FREE ( pidcont );
FREE ( buf );
return rc;
}
/*
* a pg_ctl location list
* for later supplement
*/
const char * pgctlpaths[] =
{ "/usr/bin/pg_ctl",
"/usr/sbin/pg_ctl",
"/usr/local/bin/pg_ctl",
"/usr/local/sbin/pg_ctl",
"/usr/local/postgresql/bin/pg_ctl",
"/usr/local/postgresql/8.0/bin/pg_ctl",
"/usr/local/postgresql/8.1/bin/pg_ctl",
"/usr/local/postgresql/8.2/bin/pg_ctl",
"/usr/local/postgresql/8.3/bin/pg_ctl",
"/usr/local/postgresql/8.4/bin/pg_ctl",
"/usr/local/postgresql/9.0/bin/pg_ctl",
"/usr/lib/postgresql/bin/pg_ctl",
"/usr/lib/postgresql/8.0/bin/pg_ctl",
"/usr/lib/postgresql/8.1/bin/pg_ctl",
"/usr/lib/postgresql/8.2/bin/pg_ctl",
"/usr/lib/postgresql/8.3/bin/pg_ctl",
"/usr/lib/postgresql/8.4/bin/pg_ctl",
"/usr/lib/postgresql/9.0/bin/pg_ctl",
"/usr/lib/postgresql/9.1/bin/pg_ctl",
/* Solaris locations */
"/usr/lib/postgres/8.0/bin/pg_ctl",
"/usr/lib/postgres/8.1/bin/pg_ctl",
"/usr/lib/postgres/8.2/bin/pg_ctl",
"/usr/lib/postgres/8.3/bin/pg_ctl",
"/usr/lib/postgres/8.4/bin/pg_ctl",
"/usr/lib/postgres/9.0/bin/pg_ctl",
"/usr/lib/postgres/9.1/bin/pg_ctl",
NULL
};
/*
* searches for pg_ctl location
*
* in:
* pdata - program data
* out:
* absolute path location
*/
const char * find_pgctl ( pgsqldata * pdata ){
int i;
int err;
const char * pgctl = NULL;
struct stat st;
/* searching for pg_ctl location */
for ( i = 0; pgctlpaths[i]; i++ ){
//printf ( "%s\n", pgctlpaths[i] );
err = stat ( pgctlpaths[i] , &st );
if ( ! err ){
pgctl = pgctlpaths[i];
break;
}
}
return pgctl;
}
#if 0
/*
* standard readline
*/
int readline ( int fd, char * buf, int size ){
char c;
int n;
for ( n = 0; n < size; n++ ){
if ( read ( fd, &c, 1 ) == 1 ){
/* read a char */
if ( c == '\n' ){
buf [ n ] = 0;
break;
} else {
buf [ n ] = c;
}
} else {
buf [ n ] = 0;
break;
}
}
return n;
}
/*
* standard readline for file stream