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postgresql/src/bin/pg_upgrade/option.c

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/*
* option.c
*
* options functions
*
* Copyright (c) 2010-2020, PostgreSQL Global Development Group
* src/bin/pg_upgrade/option.c
*/
#include "postgres_fe.h"
#include <time.h>
#ifdef WIN32
#include <io.h>
#endif
#include "common/string.h"
#include "getopt_long.h"
#include "pg_upgrade.h"
#include "utils/pidfile.h"
static void usage(void);
static void check_required_directory(char **dirpath,
const char *envVarName, bool useCwd,
const char *cmdLineOption, const char *description,
bool missingOk);
#define FIX_DEFAULT_READ_ONLY "-c default_transaction_read_only=false"
UserOpts user_opts;
/*
* parseCommandLine()
*
* Parses the command line (argc, argv[]) and loads structures
*/
void
parseCommandLine(int argc, char *argv[])
{
static struct option long_options[] = {
{"old-datadir", required_argument, NULL, 'd'},
{"new-datadir", required_argument, NULL, 'D'},
{"old-bindir", required_argument, NULL, 'b'},
{"new-bindir", required_argument, NULL, 'B'},
{"old-options", required_argument, NULL, 'o'},
{"new-options", required_argument, NULL, 'O'},
{"old-port", required_argument, NULL, 'p'},
{"new-port", required_argument, NULL, 'P'},
{"username", required_argument, NULL, 'U'},
{"check", no_argument, NULL, 'c'},
{"link", no_argument, NULL, 'k'},
{"retain", no_argument, NULL, 'r'},
{"jobs", required_argument, NULL, 'j'},
{"socketdir", required_argument, NULL, 's'},
{"verbose", no_argument, NULL, 'v'},
{"clone", no_argument, NULL, 1},
{NULL, 0, NULL, 0}
};
int option; /* Command line option */
int optindex = 0; /* used by getopt_long */
int os_user_effective_id;
FILE *fp;
char **filename;
time_t run_time = time(NULL);
user_opts.transfer_mode = TRANSFER_MODE_COPY;
os_info.progname = get_progname(argv[0]);
/* Process libpq env. variables; load values here for usage() output */
old_cluster.port = getenv("PGPORTOLD") ? atoi(getenv("PGPORTOLD")) : DEF_PGUPORT;
new_cluster.port = getenv("PGPORTNEW") ? atoi(getenv("PGPORTNEW")) : DEF_PGUPORT;
os_user_effective_id = get_user_info(&os_info.user);
/* we override just the database user name; we got the OS id above */
if (getenv("PGUSER"))
{
pg_free(os_info.user);
/* must save value, getenv()'s pointer is not stable */
os_info.user = pg_strdup(getenv("PGUSER"));
}
if (argc > 1)
{
if (strcmp(argv[1], "--help") == 0 || strcmp(argv[1], "-?") == 0)
{
usage();
exit(0);
}
if (strcmp(argv[1], "--version") == 0 || strcmp(argv[1], "-V") == 0)
{
puts("pg_upgrade (PostgreSQL) " PG_VERSION);
exit(0);
}
}
/* Allow help and version to be run as root, so do the test here. */
if (os_user_effective_id == 0)
pg_fatal("%s: cannot be run as root\n", os_info.progname);
while ((option = getopt_long(argc, argv, "d:D:b:B:cj:ko:O:p:P:rs:U:v",
long_options, &optindex)) != -1)
{
switch (option)
{
case 'b':
old_cluster.bindir = pg_strdup(optarg);
break;
case 'B':
new_cluster.bindir = pg_strdup(optarg);
break;
case 'c':
user_opts.check = true;
break;
case 'd':
old_cluster.pgdata = pg_strdup(optarg);
break;
case 'D':
new_cluster.pgdata = pg_strdup(optarg);
break;
case 'j':
user_opts.jobs = atoi(optarg);
break;
case 'k':
user_opts.transfer_mode = TRANSFER_MODE_LINK;
break;
case 'o':
/* append option? */
if (!old_cluster.pgopts)
old_cluster.pgopts = pg_strdup(optarg);
else
{
char *old_pgopts = old_cluster.pgopts;
old_cluster.pgopts = psprintf("%s %s", old_pgopts, optarg);
free(old_pgopts);
}
break;
case 'O':
/* append option? */
if (!new_cluster.pgopts)
new_cluster.pgopts = pg_strdup(optarg);
else
{
char *new_pgopts = new_cluster.pgopts;
new_cluster.pgopts = psprintf("%s %s", new_pgopts, optarg);
free(new_pgopts);
}
break;
/*
* Someday, the port number option could be removed and passed
* using -o/-O, but that requires postmaster -C to be
* supported on all old/new versions (added in PG 9.2).
*/
case 'p':
if ((old_cluster.port = atoi(optarg)) <= 0)
pg_fatal("invalid old port number\n");
break;
case 'P':
if ((new_cluster.port = atoi(optarg)) <= 0)
pg_fatal("invalid new port number\n");
break;
case 'r':
log_opts.retain = true;
break;
case 's':
user_opts.socketdir = pg_strdup(optarg);
break;
case 'U':
pg_free(os_info.user);
os_info.user = pg_strdup(optarg);
os_info.user_specified = true;
/*
* Push the user name into the environment so pre-9.1
* pg_ctl/libpq uses it.
*/
pg_putenv("PGUSER", os_info.user);
break;
case 'v':
log_opts.verbose = true;
break;
case 1:
user_opts.transfer_mode = TRANSFER_MODE_CLONE;
break;
default:
fprintf(stderr, _("Try \"%s --help\" for more information.\n"),
os_info.progname);
exit(1);
}
}
if (optind < argc)
pg_fatal("too many command-line arguments (first is \"%s\")\n", argv[optind]);
if ((log_opts.internal = fopen_priv(INTERNAL_LOG_FILE, "a")) == NULL)
pg_fatal("could not open log file \"%s\": %m\n", INTERNAL_LOG_FILE);
if (log_opts.verbose)
pg_log(PG_REPORT, "Running in verbose mode\n");
/* label start of upgrade in logfiles */
for (filename = output_files; *filename != NULL; filename++)
{
if ((fp = fopen_priv(*filename, "a")) == NULL)
pg_fatal("could not write to log file \"%s\": %m\n", *filename);
/* Start with newline because we might be appending to a file. */
fprintf(fp, "\n"
"-----------------------------------------------------------------\n"
" pg_upgrade run on %s"
"-----------------------------------------------------------------\n\n",
ctime(&run_time));
fclose(fp);
}
/* Turn off read-only mode; add prefix to PGOPTIONS? */
if (getenv("PGOPTIONS"))
{
char *pgoptions = psprintf("%s %s", FIX_DEFAULT_READ_ONLY,
getenv("PGOPTIONS"));
pg_putenv("PGOPTIONS", pgoptions);
pfree(pgoptions);
}
else
pg_putenv("PGOPTIONS", FIX_DEFAULT_READ_ONLY);
/* Get values from env if not already set */
check_required_directory(&old_cluster.bindir, "PGBINOLD", false,
"-b", _("old cluster binaries reside"), false);
check_required_directory(&new_cluster.bindir, "PGBINNEW", false,
"-B", _("new cluster binaries reside"), true);
check_required_directory(&old_cluster.pgdata, "PGDATAOLD", false,
"-d", _("old cluster data resides"), false);
check_required_directory(&new_cluster.pgdata, "PGDATANEW", false,
"-D", _("new cluster data resides"), false);
check_required_directory(&user_opts.socketdir, "PGSOCKETDIR", true,
"-s", _("sockets will be created"), false);
#ifdef WIN32
/*
* On Windows, initdb --sync-only will fail with a "Permission denied"
* error on file pg_upgrade_utility.log if pg_upgrade is run inside the
* new cluster directory, so we do a check here.
*/
{
char cwd[MAXPGPATH],
new_cluster_pgdata[MAXPGPATH];
strlcpy(new_cluster_pgdata, new_cluster.pgdata, MAXPGPATH);
canonicalize_path(new_cluster_pgdata);
if (!getcwd(cwd, MAXPGPATH))
pg_fatal("could not determine current directory\n");
canonicalize_path(cwd);
if (path_is_prefix_of_path(new_cluster_pgdata, cwd))
pg_fatal("cannot run pg_upgrade from inside the new cluster data directory on Windows\n");
}
#endif
}
static void
usage(void)
{
printf(_("pg_upgrade upgrades a PostgreSQL cluster to a different major version.\n\n"));
printf(_("Usage:\n"));
printf(_(" pg_upgrade [OPTION]...\n\n"));
printf(_("Options:\n"));
printf(_(" -b, --old-bindir=BINDIR old cluster executable directory\n"));
printf(_(" -B, --new-bindir=BINDIR new cluster executable directory (default\n"
" same directory as pg_upgrade)\n"));
printf(_(" -c, --check check clusters only, don't change any data\n"));
printf(_(" -d, --old-datadir=DATADIR old cluster data directory\n"));
printf(_(" -D, --new-datadir=DATADIR new cluster data directory\n"));
printf(_(" -j, --jobs=NUM number of simultaneous processes or threads to use\n"));
printf(_(" -k, --link link instead of copying files to new cluster\n"));
printf(_(" -o, --old-options=OPTIONS old cluster options to pass to the server\n"));
printf(_(" -O, --new-options=OPTIONS new cluster options to pass to the server\n"));
printf(_(" -p, --old-port=PORT old cluster port number (default %d)\n"), old_cluster.port);
printf(_(" -P, --new-port=PORT new cluster port number (default %d)\n"), new_cluster.port);
printf(_(" -r, --retain retain SQL and log files after success\n"));
printf(_(" -s, --socketdir=DIR socket directory to use (default current dir.)\n"));
printf(_(" -U, --username=NAME cluster superuser (default \"%s\")\n"), os_info.user);
printf(_(" -v, --verbose enable verbose internal logging\n"));
printf(_(" -V, --version display version information, then exit\n"));
printf(_(" --clone clone instead of copying files to new cluster\n"));
printf(_(" -?, --help show this help, then exit\n"));
printf(_("\n"
"Before running pg_upgrade you must:\n"
" create a new database cluster (using the new version of initdb)\n"
" shutdown the postmaster servicing the old cluster\n"
" shutdown the postmaster servicing the new cluster\n"));
printf(_("\n"
"When you run pg_upgrade, you must provide the following information:\n"
" the data directory for the old cluster (-d DATADIR)\n"
" the data directory for the new cluster (-D DATADIR)\n"
" the \"bin\" directory for the old version (-b BINDIR)\n"
" the \"bin\" directory for the new version (-B BINDIR)\n"));
printf(_("\n"
"For example:\n"
" pg_upgrade -d oldCluster/data -D newCluster/data -b oldCluster/bin -B newCluster/bin\n"
"or\n"));
#ifndef WIN32
printf(_(" $ export PGDATAOLD=oldCluster/data\n"
" $ export PGDATANEW=newCluster/data\n"
" $ export PGBINOLD=oldCluster/bin\n"
" $ export PGBINNEW=newCluster/bin\n"
" $ pg_upgrade\n"));
#else
printf(_(" C:\\> set PGDATAOLD=oldCluster/data\n"
" C:\\> set PGDATANEW=newCluster/data\n"
" C:\\> set PGBINOLD=oldCluster/bin\n"
" C:\\> set PGBINNEW=newCluster/bin\n"
" C:\\> pg_upgrade\n"));
#endif
printf(_("\nReport bugs to <%s>.\n"), PACKAGE_BUGREPORT);
printf(_("%s home page: <%s>\n"), PACKAGE_NAME, PACKAGE_URL);
}
/*
* check_required_directory()
*
* Checks a directory option.
* dirpath - the directory name supplied on the command line, or NULL
* envVarName - the name of an environment variable to get if dirpath is NULL
* useCwd - true if OK to default to CWD
* cmdLineOption - the command line option for this directory
* description - a description of this directory option
* missingOk - true if OK that both dirpath and envVarName are not existing
*
* We use the last two arguments to construct a meaningful error message if the
* user hasn't provided the required directory name.
*/
static void
check_required_directory(char **dirpath, const char *envVarName, bool useCwd,
const char *cmdLineOption, const char *description,
bool missingOk)
{
if (*dirpath == NULL || strlen(*dirpath) == 0)
{
const char *envVar;
if ((envVar = getenv(envVarName)) && strlen(envVar))
*dirpath = pg_strdup(envVar);
else if (useCwd)
{
char cwd[MAXPGPATH];
if (!getcwd(cwd, MAXPGPATH))
pg_fatal("could not determine current directory\n");
*dirpath = pg_strdup(cwd);
}
else if (missingOk)
return;
else
pg_fatal("You must identify the directory where the %s.\n"
"Please use the %s command-line option or the %s environment variable.\n",
description, cmdLineOption, envVarName);
}
/*
* Clean up the path, in particular trimming any trailing path separators,
* because we construct paths by appending to this path.
*/
canonicalize_path(*dirpath);
}
/*
* adjust_data_dir
*
* If a configuration-only directory was specified, find the real data dir
* by querying the running server. This has limited checking because we
* can't check for a running server because we can't find postmaster.pid.
*
* On entry, cluster->pgdata has been set from command line or env variable,
* but cluster->pgconfig isn't set. We fill both variables with corrected
* values.
*/
void
adjust_data_dir(ClusterInfo *cluster)
{
char filename[MAXPGPATH];
char cmd[MAXPGPATH],
cmd_output[MAX_STRING];
FILE *fp,
*output;
/* Initially assume config dir and data dir are the same */
cluster->pgconfig = pg_strdup(cluster->pgdata);
/* If there is no postgresql.conf, it can't be a config-only dir */
snprintf(filename, sizeof(filename), "%s/postgresql.conf", cluster->pgconfig);
if ((fp = fopen(filename, "r")) == NULL)
return;
fclose(fp);
/* If PG_VERSION exists, it can't be a config-only dir */
snprintf(filename, sizeof(filename), "%s/PG_VERSION", cluster->pgconfig);
if ((fp = fopen(filename, "r")) != NULL)
{
fclose(fp);
return;
}
/* Must be a configuration directory, so find the real data directory. */
if (cluster == &old_cluster)
prep_status("Finding the real data directory for the source cluster");
else
prep_status("Finding the real data directory for the target cluster");
/*
* We don't have a data directory yet, so we can't check the PG version,
* so this might fail --- only works for PG 9.2+. If this fails,
* pg_upgrade will fail anyway because the data files will not be found.
*/
snprintf(cmd, sizeof(cmd), "\"%s/postgres\" -D \"%s\" -C data_directory",
cluster->bindir, cluster->pgconfig);
if ((output = popen(cmd, "r")) == NULL ||
fgets(cmd_output, sizeof(cmd_output), output) == NULL)
pg_fatal("could not get data directory using %s: %s\n",
cmd, strerror(errno));
pclose(output);
/* strip trailing newline and carriage return */
(void) pg_strip_crlf(cmd_output);
cluster->pgdata = pg_strdup(cmd_output);
check_ok();
}
/*
* get_sock_dir
*
* Identify the socket directory to use for this cluster. If we're doing
* a live check (old cluster only), we need to find out where the postmaster
* is listening. Otherwise, we're going to put the socket into the current
* directory.
*/
void
get_sock_dir(ClusterInfo *cluster, bool live_check)
{
#ifdef HAVE_UNIX_SOCKETS
/*
* sockdir and port were added to postmaster.pid in PG 9.1. Pre-9.1 cannot
* process pg_ctl -w for sockets in non-default locations.
*/
if (GET_MAJOR_VERSION(cluster->major_version) >= 901)
{
if (!live_check)
cluster->sockdir = user_opts.socketdir;
else
{
/*
* If we are doing a live check, we will use the old cluster's
* Unix domain socket directory so we can connect to the live
* server.
*/
unsigned short orig_port = cluster->port;
char filename[MAXPGPATH],
line[MAXPGPATH];
FILE *fp;
int lineno;
snprintf(filename, sizeof(filename), "%s/postmaster.pid",
cluster->pgdata);
if ((fp = fopen(filename, "r")) == NULL)
pg_fatal("could not open file \"%s\": %s\n",
filename, strerror(errno));
for (lineno = 1;
lineno <= Max(LOCK_FILE_LINE_PORT, LOCK_FILE_LINE_SOCKET_DIR);
lineno++)
{
if (fgets(line, sizeof(line), fp) == NULL)
pg_fatal("could not read line %d from file \"%s\": %s\n",
lineno, filename, strerror(errno));
/* potentially overwrite user-supplied value */
if (lineno == LOCK_FILE_LINE_PORT)
sscanf(line, "%hu", &old_cluster.port);
if (lineno == LOCK_FILE_LINE_SOCKET_DIR)
{
/* strip trailing newline and carriage return */
cluster->sockdir = pg_strdup(line);
(void) pg_strip_crlf(cluster->sockdir);
}
}
fclose(fp);
/* warn of port number correction */
if (orig_port != DEF_PGUPORT && old_cluster.port != orig_port)
pg_log(PG_WARNING, "user-supplied old port number %hu corrected to %hu\n",
orig_port, cluster->port);
}
}
else
/*
* Can't get sockdir and pg_ctl -w can't use a non-default, use
* default
*/
cluster->sockdir = NULL;
#else /* !HAVE_UNIX_SOCKETS */
cluster->sockdir = NULL;
#endif
}
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