postgresql/contrib/pg_upgrade/option.c
2011-11-04 10:40:25 -04:00

402 lines
11 KiB
C

/*
* opt.c
*
* options functions
*
* Copyright (c) 2010-2011, PostgreSQL Global Development Group
* contrib/pg_upgrade/option.c
*/
#include "postgres.h"
#include "pg_upgrade.h"
#include "getopt_long.h"
#ifdef WIN32
#include <io.h>
#endif
static void usage(void);
static void check_required_directory(char **dirpath,
char *envVarName, char *cmdLineOption, char *description);
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'},
{"user", required_argument, NULL, 'u'},
{"check", no_argument, NULL, 'c'},
{"debug", no_argument, NULL, 'g'},
{"debugfile", required_argument, NULL, 'G'},
{"link", no_argument, NULL, 'k'},
{"logfile", required_argument, NULL, 'l'},
{"verbose", no_argument, NULL, 'v'},
{NULL, 0, NULL, 0}
};
int option; /* Command line option */
int optindex = 0; /* used by getopt_long */
int os_user_effective_id;
char *return_buf;
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], "-h") == 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_log(PG_FATAL, "%s: cannot be run as root\n", os_info.progname);
return_buf = getcwd(os_info.cwd, MAXPGPATH);
if (return_buf == NULL)
pg_log(PG_FATAL, "Could not access current working directory: %s\n", getErrorText(errno));
while ((option = getopt_long(argc, argv, "d:D:b:B:cgG:kl:o:O:p:P: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);
old_cluster.pgconfig = pg_strdup(optarg);
break;
case 'D':
new_cluster.pgdata = pg_strdup(optarg);
new_cluster.pgconfig = pg_strdup(optarg);
break;
case 'g':
pg_log(PG_REPORT, "Running in debug mode\n");
log_opts.debug = true;
break;
case 'G':
if ((log_opts.debug_fd = fopen(optarg, "w")) == NULL)
{
pg_log(PG_FATAL, "cannot open debug file\n");
exit(1);
}
break;
case 'k':
user_opts.transfer_mode = TRANSFER_MODE_LINK;
break;
case 'l':
log_opts.filename = pg_strdup(optarg);
break;
case 'o':
old_cluster.pgopts = pg_strdup(optarg);
break;
case 'O':
new_cluster.pgopts = pg_strdup(optarg);
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.
*/
case 'p':
if ((old_cluster.port = atoi(optarg)) <= 0)
{
pg_log(PG_FATAL, "invalid old port number\n");
exit(1);
}
break;
case 'P':
if ((new_cluster.port = atoi(optarg)) <= 0)
{
pg_log(PG_FATAL, "invalid new port number\n");
exit(1);
}
break;
case 'u':
pg_free(os_info.user);
os_info.user = pg_strdup(optarg);
/*
* 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':
pg_log(PG_REPORT, "Running in verbose mode\n");
log_opts.verbose = true;
break;
default:
pg_log(PG_FATAL,
"Try \"%s --help\" for more information.\n",
os_info.progname);
break;
}
}
if (log_opts.filename != NULL)
{
/*
* We must use append mode so output generated by child processes via
* ">>" will not be overwritten, and we want the file truncated on
* start.
*/
/* truncate */
if ((log_opts.fd = fopen(log_opts.filename, "w")) == NULL)
pg_log(PG_FATAL, "cannot write to log file %s\n", log_opts.filename);
fclose(log_opts.fd);
if ((log_opts.fd = fopen(log_opts.filename, "a")) == NULL)
pg_log(PG_FATAL, "cannot write to log file %s\n", log_opts.filename);
}
else
log_opts.filename = pg_strdup(DEVNULL);
/* WIN32 files do not accept writes from multiple processes */
#ifndef WIN32
log_opts.filename2 = pg_strdup(log_opts.filename);
#else
log_opts.filename2 = pg_strdup(DEVNULL);
#endif
/* if no debug file name, output to the terminal */
if (log_opts.debug && !log_opts.debug_fd)
{
log_opts.debug_fd = fopen(DEVTTY, "w");
if (!log_opts.debug_fd)
pg_log(PG_FATAL, "cannot write to terminal\n");
}
/* Get values from env if not already set */
check_required_directory(&old_cluster.bindir, "PGBINOLD", "-b",
"old cluster binaries reside");
check_required_directory(&new_cluster.bindir, "PGBINNEW", "-B",
"new cluster binaries reside");
check_required_directory(&old_cluster.pgdata, "PGDATAOLD", "-d",
"old cluster data resides");
check_required_directory(&new_cluster.pgdata, "PGDATANEW", "-D",
"new cluster data resides");
}
static void
usage(void)
{
printf(_("pg_upgrade upgrades a PostgreSQL cluster to a different major version.\n\
\nUsage:\n\
pg_upgrade [OPTIONS]...\n\
\n\
Options:\n\
-b, --old-bindir=OLDBINDIR old cluster executable directory\n\
-B, --new-bindir=NEWBINDIR new cluster executable directory\n\
-c, --check check clusters only, don't change any data\n\
-d, --old-datadir=OLDDATADIR old cluster data directory\n\
-D, --new-datadir=NEWDATADIR new cluster data directory\n\
-g, --debug enable debugging\n\
-G, --debugfile=FILENAME output debugging activity to file\n\
-k, --link link instead of copying files to new cluster\n\
-l, --logfile=FILENAME log session activity to file\n\
-o, --old-options=OPTIONS old cluster options to pass to the server\n\
-O, --new-options=OPTIONS new cluster options to pass to the server\n\
-p, --old-port=OLDPORT old cluster port number (default %d)\n\
-P, --new-port=NEWPORT new cluster port number (default %d)\n\
-u, --user=NAME clusters superuser (default \"%s\")\n\
-v, --verbose enable verbose output\n\
-V, --version display version information, then exit\n\
-h, --help show this help, then exit\n\
\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\
\n\
When you run pg_upgrade, you must provide the following information:\n\
the data directory for the old cluster (-d OLDDATADIR)\n\
the data directory for the new cluster (-D NEWDATADIR)\n\
the \"bin\" directory for the old version (-b OLDBINDIR)\n\
the \"bin\" directory for the new version (-B NEWBINDIR)\n\
\n\
For example:\n\
pg_upgrade -d oldCluster/data -D newCluster/data -b oldCluster/bin -B newCluster/bin\n\
or\n"), old_cluster.port, new_cluster.port, os_info.user);
#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 <pgsql-bugs@postgresql.org>.\n"));
}
/*
* check_required_directory()
*
* Checks a directory option.
* dirpath - the directory name supplied on the command line
* envVarName - the name of an environment variable to get if dirpath is NULL
* cmdLineOption - the command line option corresponds to this directory (-o, -O, -n, -N)
* description - a description of this directory option
*
* 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, char *envVarName,
char *cmdLineOption, char *description)
{
if (*dirpath == NULL || strlen(*dirpath) == 0)
{
const char *envVar;
if ((envVar = getenv(envVarName)) && strlen(envVar))
*dirpath = pg_strdup(envVar);
else
pg_log(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);
}
/*
* Trim off any trailing path separators
*/
#ifndef WIN32
if ((*dirpath)[strlen(*dirpath) - 1] == '/')
#else
if ((*dirpath)[strlen(*dirpath) - 1] == '/' ||
(*dirpath)[strlen(*dirpath) - 1] == '\\')
#endif
(*dirpath)[strlen(*dirpath) - 1] = 0;
}
/*
* adjust_data_dir
*
* If a configuration-only directory was specified, find the real data dir
* by quering the running server. This has limited checking because we
* can't check for a running server because we can't find postmaster.pid.
*/
void
adjust_data_dir(ClusterInfo *cluster)
{
char filename[MAXPGPATH];
char cmd[MAXPGPATH], cmd_output[MAX_STRING];
FILE *fd, *output;
/* If there is no postgresql.conf, it can't be a config-only dir */
snprintf(filename, sizeof(filename), "%s/postgresql.conf", cluster->pgconfig);
if ((fd = fopen(filename, "r")) == NULL)
return;
fclose(fd);
/* If PG_VERSION exists, it can't be a config-only dir */
snprintf(filename, sizeof(filename), "%s/PG_VERSION", cluster->pgconfig);
if ((fd = fopen(filename, "r")) != NULL)
{
fclose(fd);
return;
}
/* Must be a configuration directory, so find the real data directory. */
prep_status("Finding the real data directory for the %s cluster",
CLUSTER_NAME(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/postmaster\" -D \"%s\" -C data_directory",
cluster->bindir, cluster->pgconfig);
if ((output = popen(cmd, "r")) == NULL ||
fgets(cmd_output, sizeof(cmd_output), output) == NULL)
pg_log(PG_FATAL, "Could not get data directory using %s: %s\n",
cmd, getErrorText(errno));
pclose(output);
/* Remove trailing newline */
if (strchr(cmd_output, '\n') != NULL)
*strchr(cmd_output, '\n') = '\0';
cluster->pgdata = pg_strdup(cmd_output);
check_ok();
}