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postgresql/contrib/pg_upgrade/controldata.c

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/*
* controldata.c
*
* controldata functions
*
* Copyright (c) 2010-2011, PostgreSQL Global Development Group
* contrib/pg_upgrade/controldata.c
*/
#include "pg_upgrade.h"
#include <ctype.h>
static void putenv2(const char *var, const char *val);
/*
* get_control_data()
*
* gets pg_control information in "ctrl". Assumes that bindir and
* datadir are valid absolute paths to postgresql bin and pgdata
* directories respectively *and* pg_resetxlog is version compatible
* with datadir. The main purpose of this function is to get pg_control
* data in a version independent manner.
*
* The approach taken here is to invoke pg_resetxlog with -n option
* and then pipe its output. With little string parsing we get the
* pg_control data. pg_resetxlog cannot be run while the server is running
* so we use pg_controldata; pg_controldata doesn't provide all the fields
* we need to actually perform the upgrade, but it provides enough for
* check mode. We do not implement pg_resetxlog -n because it is hard to
* return valid xid data for a running server.
*/
void
get_control_data(ClusterInfo *cluster, bool live_check)
{
char cmd[MAXPGPATH];
char bufin[MAX_STRING];
FILE *output;
char *p;
bool got_xid = false;
bool got_oid = false;
bool got_log_id = false;
bool got_log_seg = false;
bool got_tli = false;
bool got_align = false;
bool got_blocksz = false;
bool got_largesz = false;
bool got_walsz = false;
bool got_walseg = false;
bool got_ident = false;
bool got_index = false;
bool got_toast = false;
bool got_date_is_int = false;
bool got_float8_pass_by_value = false;
char *lc_collate = NULL;
char *lc_ctype = NULL;
char *lc_monetary = NULL;
char *lc_numeric = NULL;
char *lc_time = NULL;
char *lang = NULL;
char *language = NULL;
char *lc_all = NULL;
char *lc_messages = NULL;
/*
* Because we test the pg_resetxlog output as strings, it has to be in
* English. Copied from pg_regress.c.
*/
if (getenv("LC_COLLATE"))
lc_collate = pg_strdup(getenv("LC_COLLATE"));
if (getenv("LC_CTYPE"))
lc_ctype = pg_strdup(getenv("LC_CTYPE"));
if (getenv("LC_MONETARY"))
lc_monetary = pg_strdup(getenv("LC_MONETARY"));
if (getenv("LC_NUMERIC"))
lc_numeric = pg_strdup(getenv("LC_NUMERIC"));
if (getenv("LC_TIME"))
lc_time = pg_strdup(getenv("LC_TIME"));
if (getenv("LANG"))
lang = pg_strdup(getenv("LANG"));
if (getenv("LANGUAGE"))
language = pg_strdup(getenv("LANGUAGE"));
if (getenv("LC_ALL"))
lc_all = pg_strdup(getenv("LC_ALL"));
if (getenv("LC_MESSAGES"))
lc_messages = pg_strdup(getenv("LC_MESSAGES"));
putenv2("LC_COLLATE", NULL);
putenv2("LC_CTYPE", NULL);
putenv2("LC_MONETARY", NULL);
putenv2("LC_NUMERIC", NULL);
putenv2("LC_TIME", NULL);
putenv2("LANG",
#ifndef WIN32
NULL);
#else
/* On Windows the default locale cannot be English, so force it */
"en");
#endif
putenv2("LANGUAGE", NULL);
putenv2("LC_ALL", NULL);
putenv2("LC_MESSAGES", "C");
snprintf(cmd, sizeof(cmd), SYSTEMQUOTE "\"%s/%s \"%s\"" SYSTEMQUOTE,
cluster->bindir,
live_check ? "pg_controldata\"" : "pg_resetxlog\" -n",
cluster->pgdata);
fflush(stdout);
fflush(stderr);
if ((output = popen(cmd, "r")) == NULL)
pg_log(PG_FATAL, "Could not get control data: %s\n",
getErrorText(errno));
/* Only pre-8.4 has these so if they are not set below we will check later */
cluster->controldata.lc_collate = NULL;
cluster->controldata.lc_ctype = NULL;
/* Only in <= 8.3 */
if (GET_MAJOR_VERSION(cluster->major_version) <= 803)
{
cluster->controldata.float8_pass_by_value = false;
got_float8_pass_by_value = true;
}
/* we have the result of cmd in "output". so parse it line by line now */
while (fgets(bufin, sizeof(bufin), output))
{
if (log_opts.debug)
fputs(bufin, log_opts.debug_fd);
#ifdef WIN32
/*
* Due to an installer bug, LANG=C doesn't work for PG 8.3.3, but does
* work 8.2.6 and 8.3.7, so check for non-ASCII output and suggest a
* minor upgrade.
*/
if (GET_MAJOR_VERSION(cluster->major_version) <= 803)
{
for (p = bufin; *p; p++)
if (!isascii(*p))
pg_log(PG_FATAL,
"The 8.3 cluster's pg_controldata is incapable of outputting ASCII, even\n"
"with LANG=C. You must upgrade this cluster to a newer version of Postgres\n"
"8.3 to fix this bug. Postgres 8.3.7 and later are known to work properly.\n");
}
#endif
if ((p = strstr(bufin, "pg_control version number:")) != NULL)
{
p = strchr(p, ':');
if (p == NULL || strlen(p) <= 1)
pg_log(PG_FATAL, "%d: pg_resetxlog problem\n", __LINE__);
p++; /* removing ':' char */
cluster->controldata.ctrl_ver = str2uint(p);
}
else if ((p = strstr(bufin, "Catalog version number:")) != NULL)
{
p = strchr(p, ':');
if (p == NULL || strlen(p) <= 1)
pg_log(PG_FATAL, "%d: controldata retrieval problem\n", __LINE__);
p++; /* removing ':' char */
cluster->controldata.cat_ver = str2uint(p);
}
else if ((p = strstr(bufin, "First log file ID after reset:")) != NULL)
{
p = strchr(p, ':');
if (p == NULL || strlen(p) <= 1)
pg_log(PG_FATAL, "%d: controldata retrieval problem\n", __LINE__);
p++; /* removing ':' char */
cluster->controldata.logid = str2uint(p);
got_log_id = true;
}
else if ((p = strstr(bufin, "First log file segment after reset:")) != NULL)
{
p = strchr(p, ':');
if (p == NULL || strlen(p) <= 1)
pg_log(PG_FATAL, "%d: controldata retrieval problem\n", __LINE__);
p++; /* removing ':' char */
cluster->controldata.nxtlogseg = str2uint(p);
got_log_seg = true;
}
else if ((p = strstr(bufin, "Latest checkpoint's TimeLineID:")) != NULL)
{
p = strchr(p, ':');
if (p == NULL || strlen(p) <= 1)
pg_log(PG_FATAL, "%d: controldata retrieval problem\n", __LINE__);
p++; /* removing ':' char */
cluster->controldata.chkpnt_tli = str2uint(p);
got_tli = true;
}
else if ((p = strstr(bufin, "Latest checkpoint's NextXID:")) != NULL)
{
char *op = strchr(p, '/');
if (op == NULL)
op = strchr(p, ':');
if (op == NULL || strlen(op) <= 1)
pg_log(PG_FATAL, "%d: controldata retrieval problem\n", __LINE__);
op++; /* removing ':' char */
cluster->controldata.chkpnt_nxtxid = str2uint(op);
got_xid = true;
}
else if ((p = strstr(bufin, "Latest checkpoint's NextOID:")) != NULL)
{
p = strchr(p, ':');
if (p == NULL || strlen(p) <= 1)
pg_log(PG_FATAL, "%d: controldata retrieval problem\n", __LINE__);
p++; /* removing ':' char */
cluster->controldata.chkpnt_nxtoid = str2uint(p);
got_oid = true;
}
else if ((p = strstr(bufin, "Maximum data alignment:")) != NULL)
{
p = strchr(p, ':');
if (p == NULL || strlen(p) <= 1)
pg_log(PG_FATAL, "%d: controldata retrieval problem\n", __LINE__);
p++; /* removing ':' char */
cluster->controldata.align = str2uint(p);
got_align = true;
}
else if ((p = strstr(bufin, "Database block size:")) != NULL)
{
p = strchr(p, ':');
if (p == NULL || strlen(p) <= 1)
pg_log(PG_FATAL, "%d: controldata retrieval problem\n", __LINE__);
p++; /* removing ':' char */
cluster->controldata.blocksz = str2uint(p);
got_blocksz = true;
}
else if ((p = strstr(bufin, "Blocks per segment of large relation:")) != NULL)
{
p = strchr(p, ':');
if (p == NULL || strlen(p) <= 1)
pg_log(PG_FATAL, "%d: controldata retrieval problem\n", __LINE__);
p++; /* removing ':' char */
cluster->controldata.largesz = str2uint(p);
got_largesz = true;
}
else if ((p = strstr(bufin, "WAL block size:")) != NULL)
{
p = strchr(p, ':');
if (p == NULL || strlen(p) <= 1)
pg_log(PG_FATAL, "%d: controldata retrieval problem\n", __LINE__);
p++; /* removing ':' char */
cluster->controldata.walsz = str2uint(p);
got_walsz = true;
}
else if ((p = strstr(bufin, "Bytes per WAL segment:")) != NULL)
{
p = strchr(p, ':');
if (p == NULL || strlen(p) <= 1)
pg_log(PG_FATAL, "%d: controldata retrieval problem\n", __LINE__);
p++; /* removing ':' char */
cluster->controldata.walseg = str2uint(p);
got_walseg = true;
}
else if ((p = strstr(bufin, "Maximum length of identifiers:")) != NULL)
{
p = strchr(p, ':');
if (p == NULL || strlen(p) <= 1)
pg_log(PG_FATAL, "%d: controldata retrieval problem\n", __LINE__);
p++; /* removing ':' char */
cluster->controldata.ident = str2uint(p);
got_ident = true;
}
else if ((p = strstr(bufin, "Maximum columns in an index:")) != NULL)
{
p = strchr(p, ':');
if (p == NULL || strlen(p) <= 1)
pg_log(PG_FATAL, "%d: controldata retrieval problem\n", __LINE__);
p++; /* removing ':' char */
cluster->controldata.index = str2uint(p);
got_index = true;
}
else if ((p = strstr(bufin, "Maximum size of a TOAST chunk:")) != NULL)
{
p = strchr(p, ':');
if (p == NULL || strlen(p) <= 1)
pg_log(PG_FATAL, "%d: controldata retrieval problem\n", __LINE__);
p++; /* removing ':' char */
cluster->controldata.toast = str2uint(p);
got_toast = true;
}
else if ((p = strstr(bufin, "Date/time type storage:")) != NULL)
{
p = strchr(p, ':');
if (p == NULL || strlen(p) <= 1)
pg_log(PG_FATAL, "%d: controldata retrieval problem\n", __LINE__);
p++; /* removing ':' char */
cluster->controldata.date_is_int = strstr(p, "64-bit integers") != NULL;
got_date_is_int = true;
}
else if ((p = strstr(bufin, "Float8 argument passing:")) != NULL)
{
p = strchr(p, ':');
if (p == NULL || strlen(p) <= 1)
pg_log(PG_FATAL, "%d: controldata retrieval problem\n", __LINE__);
p++; /* removing ':' char */
/* used later for /contrib check */
cluster->controldata.float8_pass_by_value = strstr(p, "by value") != NULL;
got_float8_pass_by_value = true;
}
/* In pre-8.4 only */
else if ((p = strstr(bufin, "LC_COLLATE:")) != NULL)
{
p = strchr(p, ':');
if (p == NULL || strlen(p) <= 1)
pg_log(PG_FATAL, "%d: controldata retrieval problem\n", __LINE__);
p++; /* removing ':' char */
/* skip leading spaces and remove trailing newline */
p += strspn(p, " ");
if (strlen(p) > 0 && *(p + strlen(p) - 1) == '\n')
*(p + strlen(p) - 1) = '\0';
cluster->controldata.lc_collate = pg_strdup(p);
}
/* In pre-8.4 only */
else if ((p = strstr(bufin, "LC_CTYPE:")) != NULL)
{
p = strchr(p, ':');
if (p == NULL || strlen(p) <= 1)
pg_log(PG_FATAL, "%d: controldata retrieval problem\n", __LINE__);
p++; /* removing ':' char */
/* skip leading spaces and remove trailing newline */
p += strspn(p, " ");
if (strlen(p) > 0 && *(p + strlen(p) - 1) == '\n')
*(p + strlen(p) - 1) = '\0';
cluster->controldata.lc_ctype = pg_strdup(p);
}
}
if (output)
pclose(output);
/*
* Restore environment variables
*/
putenv2("LC_COLLATE", lc_collate);
putenv2("LC_CTYPE", lc_ctype);
putenv2("LC_MONETARY", lc_monetary);
putenv2("LC_NUMERIC", lc_numeric);
putenv2("LC_TIME", lc_time);
putenv2("LANG", lang);
putenv2("LANGUAGE", language);
putenv2("LC_ALL", lc_all);
putenv2("LC_MESSAGES", lc_messages);
pg_free(lc_collate);
pg_free(lc_ctype);
pg_free(lc_monetary);
pg_free(lc_numeric);
pg_free(lc_time);
pg_free(lang);
pg_free(language);
pg_free(lc_all);
pg_free(lc_messages);
/* verify that we got all the mandatory pg_control data */
if (!got_xid || !got_oid ||
(!live_check && !got_log_id) ||
(!live_check && !got_log_seg) ||
!got_tli ||
!got_align || !got_blocksz || !got_largesz || !got_walsz ||
!got_walseg || !got_ident || !got_index || !got_toast ||
!got_date_is_int || !got_float8_pass_by_value)
{
pg_log(PG_REPORT,
"Some required control information is missing; cannot find:\n");
if (!got_xid)
pg_log(PG_REPORT, " checkpoint next XID\n");
if (!got_oid)
pg_log(PG_REPORT, " latest checkpoint next OID\n");
if (!live_check && !got_log_id)
pg_log(PG_REPORT, " first log file ID after reset\n");
if (!live_check && !got_log_seg)
pg_log(PG_REPORT, " first log file segment after reset\n");
if (!got_tli)
pg_log(PG_REPORT, " latest checkpoint timeline ID\n");
if (!got_align)
pg_log(PG_REPORT, " maximum alignment\n");
if (!got_blocksz)
pg_log(PG_REPORT, " block size\n");
if (!got_largesz)
pg_log(PG_REPORT, " large relation segment size\n");
if (!got_walsz)
pg_log(PG_REPORT, " WAL block size\n");
if (!got_walseg)
pg_log(PG_REPORT, " WAL segment size\n");
if (!got_ident)
pg_log(PG_REPORT, " maximum identifier length\n");
if (!got_index)
pg_log(PG_REPORT, " maximum number of indexed columns\n");
if (!got_toast)
pg_log(PG_REPORT, " maximum TOAST chunk size\n");
if (!got_date_is_int)
pg_log(PG_REPORT, " dates/times are integers?\n");
/* value added in Postgres 8.4 */
if (!got_float8_pass_by_value)
pg_log(PG_REPORT, " float8 argument passing method\n");
pg_log(PG_FATAL,
"Unable to continue without required control information, terminating\n");
}
}
/*
* check_control_data()
*
* check to make sure the control data settings are compatible
*/
void
check_control_data(ControlData *oldctrl,
ControlData *newctrl)
{
if (oldctrl->align == 0 || oldctrl->align != newctrl->align)
pg_log(PG_FATAL,
"old and new pg_controldata alignments are invalid or do not match\n");
if (oldctrl->blocksz == 0 || oldctrl->blocksz != newctrl->blocksz)
pg_log(PG_FATAL,
"old and new pg_controldata block sizes are invalid or do not match\n");
if (oldctrl->largesz == 0 || oldctrl->largesz != newctrl->largesz)
pg_log(PG_FATAL,
"old and new pg_controldata maximum relation segement sizes are invalid or do not match\n");
if (oldctrl->walsz == 0 || oldctrl->walsz != newctrl->walsz)
pg_log(PG_FATAL,
"old and new pg_controldata WAL block sizes are invalid or do not match\n");
if (oldctrl->walseg == 0 || oldctrl->walseg != newctrl->walseg)
pg_log(PG_FATAL,
"old and new pg_controldata WAL segment sizes are invalid or do not match\n");
if (oldctrl->ident == 0 || oldctrl->ident != newctrl->ident)
pg_log(PG_FATAL,
"old and new pg_controldata maximum identifier lengths are invalid or do not match\n");
if (oldctrl->index == 0 || oldctrl->index != newctrl->index)
pg_log(PG_FATAL,
"old and new pg_controldata maximum indexed columns are invalid or do not match\n");
if (oldctrl->toast == 0 || oldctrl->toast != newctrl->toast)
pg_log(PG_FATAL,
"old and new pg_controldata maximum TOAST chunk sizes are invalid or do not match\n");
if (oldctrl->date_is_int != newctrl->date_is_int)
{
pg_log(PG_WARNING,
"\nOld and new pg_controldata date/time storage types do not match.\n");
/*
* This is a common 8.3 -> 8.4 upgrade problem, so we are more verbose
*/
pg_log(PG_FATAL,
"You will need to rebuild the new server with configure\n"
"--disable-integer-datetimes or get server binaries built\n"
"with those options.\n");
}
}
void
rename_old_pg_control(void)
{
char old_path[MAXPGPATH],
new_path[MAXPGPATH];
prep_status("Adding \".old\" suffix to old global/pg_control");
snprintf(old_path, sizeof(old_path), "%s/global/pg_control", old_cluster.pgdata);
snprintf(new_path, sizeof(new_path), "%s/global/pg_control.old", old_cluster.pgdata);
if (pg_mv_file(old_path, new_path) != 0)
pg_log(PG_FATAL, "Unable to rename %s to %s.\n", old_path, new_path);
check_ok();
}
/*
* putenv2()
*
* This is like putenv(), but takes two arguments.
* It also does unsetenv() if val is NULL.
*/
static void
putenv2(const char *var, const char *val)
{
if (val)
{
#ifndef WIN32
char *envstr = (char *) pg_malloc(strlen(var) +
strlen(val) + 2);
sprintf(envstr, "%s=%s", var, val);
putenv(envstr);
/*
* Do not free envstr because it becomes part of the environment on
* some operating systems. See port/unsetenv.c::unsetenv.
*/
#else
SetEnvironmentVariableA(var, val);
#endif
}
else
{
#ifndef WIN32
unsetenv(var);
#else
SetEnvironmentVariableA(var, "");
#endif
}
}
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