PostgreSQL Source Code  git master
dumputils.h File Reference
#include "libpq-fe.h"
#include "pqexpbuffer.h"
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Macros

#define PGDUMP_STRFTIME_FMT   "%Y-%m-%d %H:%M:%S %Z"
 

Functions

bool buildACLCommands (const char *name, const char *subname, const char *nspname, const char *type, const char *acls, const char *racls, const char *owner, const char *prefix, int remoteVersion, PQExpBuffer sql)
 
bool buildDefaultACLCommands (const char *type, const char *nspname, const char *acls, const char *racls, const char *initacls, const char *initracls, const char *owner, int remoteVersion, PQExpBuffer sql)
 
void buildShSecLabelQuery (const char *catalog_name, Oid objectId, PQExpBuffer sql)
 
void emitShSecLabels (PGconn *conn, PGresult *res, PQExpBuffer buffer, const char *objtype, const char *objname)
 
void buildACLQueries (PQExpBuffer acl_subquery, PQExpBuffer racl_subquery, PQExpBuffer init_acl_subquery, PQExpBuffer init_racl_subquery, const char *acl_column, const char *acl_owner, const char *obj_kind, bool binary_upgrade)
 
bool variable_is_guc_list_quote (const char *name)
 
bool SplitGUCList (char *rawstring, char separator, char ***namelist)
 
void makeAlterConfigCommand (PGconn *conn, const char *configitem, const char *type, const char *name, const char *type2, const char *name2, PQExpBuffer buf)
 

Macro Definition Documentation

◆ PGDUMP_STRFTIME_FMT

#define PGDUMP_STRFTIME_FMT   "%Y-%m-%d %H:%M:%S %Z"

Definition at line 33 of file dumputils.h.

Referenced by dumpTimestamp(), and PrintTOCSummary().

Function Documentation

◆ buildACLCommands()

bool buildACLCommands ( const char *  name,
const char *  subname,
const char *  nspname,
const char *  type,
const char *  acls,
const char *  racls,
const char *  owner,
const char *  prefix,
int  remoteVersion,
PQExpBuffer  sql 
)

Definition at line 58 of file dumputils.c.

References appendPQExpBuffer(), appendPQExpBufferStr(), Assert, createPQExpBuffer(), PQExpBufferData::data, destroyPQExpBuffer(), fmtId(), free, i, PQExpBufferData::len, parseAclItem(), parsePGArray(), and printfPQExpBuffer().

Referenced by buildDefaultACLCommands(), dumpACL(), and dumpTablespaces().

62 {
63  bool ok = true;
64  char **aclitems = NULL;
65  char **raclitems = NULL;
66  int naclitems = 0;
67  int nraclitems = 0;
68  int i;
69  PQExpBuffer grantee,
70  grantor,
71  privs,
72  privswgo;
73  PQExpBuffer firstsql,
74  secondsql;
75  bool found_owner_privs = false;
76 
77  if (strlen(acls) == 0 && strlen(racls) == 0)
78  return true; /* object has default permissions */
79 
80  /* treat empty-string owner same as NULL */
81  if (owner && *owner == '\0')
82  owner = NULL;
83 
84  if (strlen(acls) != 0)
85  {
86  if (!parsePGArray(acls, &aclitems, &naclitems))
87  {
88  if (aclitems)
89  free(aclitems);
90  return false;
91  }
92  }
93 
94  if (strlen(racls) != 0)
95  {
96  if (!parsePGArray(racls, &raclitems, &nraclitems))
97  {
98  if (aclitems)
99  free(aclitems);
100  if (raclitems)
101  free(raclitems);
102  return false;
103  }
104  }
105 
106  grantee = createPQExpBuffer();
107  grantor = createPQExpBuffer();
108  privs = createPQExpBuffer();
109  privswgo = createPQExpBuffer();
110 
111  /*
112  * At the end, these two will be pasted together to form the result.
113  *
114  * For older systems we use these to ensure that the owner privileges go
115  * before the other ones, as a GRANT could create the default entry for
116  * the object, which generally includes all rights for the owner. In more
117  * recent versions we normally handle this because the owner rights come
118  * first in the ACLs, but older versions might have them after the PUBLIC
119  * privileges.
120  *
121  * For 9.6 and later systems, much of this changes. With 9.6, we check
122  * the default privileges for the objects at dump time and create two sets
123  * of ACLs- "racls" which are the ACLs to REVOKE from the object (as the
124  * object may have initial privileges on it, along with any default ACLs
125  * which are not part of the current set of privileges), and regular
126  * "acls", which are the ACLs to GRANT to the object. We handle the
127  * REVOKEs first, followed by the GRANTs.
128  */
129  firstsql = createPQExpBuffer();
130  secondsql = createPQExpBuffer();
131 
132  /*
133  * For pre-9.6 systems, we always start with REVOKE ALL FROM PUBLIC, as we
134  * don't wish to make any assumptions about what the default ACLs are, and
135  * we do not collect them during the dump phase (and racls will always be
136  * the empty set, see above).
137  *
138  * For 9.6 and later, if any revoke ACLs have been provided, then include
139  * them in 'firstsql'.
140  *
141  * Revoke ACLs happen when an object starts out life with a set of
142  * privileges (eg: GRANT SELECT ON pg_class TO PUBLIC;) and the user has
143  * decided to revoke those rights. Since those objects come into being
144  * with those default privileges, we have to revoke them to match what the
145  * current state of affairs is. Note that we only started explicitly
146  * tracking such initial rights in 9.6, and prior to that all initial
147  * rights are actually handled by the simple 'REVOKE ALL .. FROM PUBLIC'
148  * case, for initdb-created objects. Prior to 9.6, we didn't handle
149  * extensions correctly, but we do now by tracking their initial
150  * privileges, in the same way we track initdb initial privileges, see
151  * pg_init_privs.
152  */
153  if (remoteVersion < 90600)
154  {
155  Assert(nraclitems == 0);
156 
157  appendPQExpBuffer(firstsql, "%sREVOKE ALL", prefix);
158  if (subname)
159  appendPQExpBuffer(firstsql, "(%s)", subname);
160  appendPQExpBuffer(firstsql, " ON %s ", type);
161  if (nspname && *nspname)
162  appendPQExpBuffer(firstsql, "%s.", fmtId(nspname));
163  appendPQExpBuffer(firstsql, "%s FROM PUBLIC;\n", name);
164  }
165  else
166  {
167  /* Scan individual REVOKE ACL items */
168  for (i = 0; i < nraclitems; i++)
169  {
170  if (!parseAclItem(raclitems[i], type, name, subname, remoteVersion,
171  grantee, grantor, privs, NULL))
172  {
173  ok = false;
174  break;
175  }
176 
177  if (privs->len > 0)
178  {
179  appendPQExpBuffer(firstsql, "%sREVOKE %s ON %s ",
180  prefix, privs->data, type);
181  if (nspname && *nspname)
182  appendPQExpBuffer(firstsql, "%s.", fmtId(nspname));
183  appendPQExpBuffer(firstsql, "%s FROM ", name);
184  if (grantee->len == 0)
185  appendPQExpBufferStr(firstsql, "PUBLIC;\n");
186  else if (strncmp(grantee->data, "group ",
187  strlen("group ")) == 0)
188  appendPQExpBuffer(firstsql, "GROUP %s;\n",
189  fmtId(grantee->data + strlen("group ")));
190  else
191  appendPQExpBuffer(firstsql, "%s;\n",
192  fmtId(grantee->data));
193  }
194  }
195  }
196 
197  /*
198  * We still need some hacking though to cover the case where new default
199  * public privileges are added in new versions: the REVOKE ALL will revoke
200  * them, leading to behavior different from what the old version had,
201  * which is generally not what's wanted. So add back default privs if the
202  * source database is too old to have had that particular priv.
203  */
204  if (remoteVersion < 80200 && strcmp(type, "DATABASE") == 0)
205  {
206  /* database CONNECT priv didn't exist before 8.2 */
207  appendPQExpBuffer(firstsql, "%sGRANT CONNECT ON %s %s TO PUBLIC;\n",
208  prefix, type, name);
209  }
210 
211  /* Scan individual ACL items */
212  for (i = 0; i < naclitems; i++)
213  {
214  if (!parseAclItem(aclitems[i], type, name, subname, remoteVersion,
215  grantee, grantor, privs, privswgo))
216  {
217  ok = false;
218  break;
219  }
220 
221  if (grantor->len == 0 && owner)
222  printfPQExpBuffer(grantor, "%s", owner);
223 
224  if (privs->len > 0 || privswgo->len > 0)
225  {
226  /*
227  * Prior to 9.6, we had to handle owner privileges in a special
228  * manner by first REVOKE'ing the rights and then GRANT'ing them
229  * after. With 9.6 and above, what we need to REVOKE and what we
230  * need to GRANT is figured out when we dump and stashed into
231  * "racls" and "acls", respectively. See above.
232  */
233  if (remoteVersion < 90600 && owner
234  && strcmp(grantee->data, owner) == 0
235  && strcmp(grantor->data, owner) == 0)
236  {
237  found_owner_privs = true;
238 
239  /*
240  * For the owner, the default privilege level is ALL WITH
241  * GRANT OPTION.
242  */
243  if (strcmp(privswgo->data, "ALL") != 0)
244  {
245  appendPQExpBuffer(firstsql, "%sREVOKE ALL", prefix);
246  if (subname)
247  appendPQExpBuffer(firstsql, "(%s)", subname);
248  appendPQExpBuffer(firstsql, " ON %s ", type);
249  if (nspname && *nspname)
250  appendPQExpBuffer(firstsql, "%s.", fmtId(nspname));
251  appendPQExpBuffer(firstsql, "%s FROM %s;\n",
252  name, fmtId(grantee->data));
253  if (privs->len > 0)
254  {
255  appendPQExpBuffer(firstsql,
256  "%sGRANT %s ON %s ",
257  prefix, privs->data, type);
258  if (nspname && *nspname)
259  appendPQExpBuffer(firstsql, "%s.", fmtId(nspname));
260  appendPQExpBuffer(firstsql,
261  "%s TO %s;\n",
262  name, fmtId(grantee->data));
263  }
264  if (privswgo->len > 0)
265  {
266  appendPQExpBuffer(firstsql,
267  "%sGRANT %s ON %s ",
268  prefix, privswgo->data, type);
269  if (nspname && *nspname)
270  appendPQExpBuffer(firstsql, "%s.", fmtId(nspname));
271  appendPQExpBuffer(firstsql,
272  "%s TO %s WITH GRANT OPTION;\n",
273  name, fmtId(grantee->data));
274  }
275  }
276  }
277  else
278  {
279  /*
280  * For systems prior to 9.6, we can assume we are starting
281  * from no privs at this point.
282  *
283  * For 9.6 and above, at this point we have issued REVOKE
284  * statements for all initial and default privileges which are
285  * no longer present on the object (as they were passed in as
286  * 'racls') and we can simply GRANT the rights which are in
287  * 'acls'.
288  */
289  if (grantor->len > 0
290  && (!owner || strcmp(owner, grantor->data) != 0))
291  appendPQExpBuffer(secondsql, "SET SESSION AUTHORIZATION %s;\n",
292  fmtId(grantor->data));
293 
294  if (privs->len > 0)
295  {
296  appendPQExpBuffer(secondsql, "%sGRANT %s ON %s ",
297  prefix, privs->data, type);
298  if (nspname && *nspname)
299  appendPQExpBuffer(secondsql, "%s.", fmtId(nspname));
300  appendPQExpBuffer(secondsql, "%s TO ", name);
301  if (grantee->len == 0)
302  appendPQExpBufferStr(secondsql, "PUBLIC;\n");
303  else if (strncmp(grantee->data, "group ",
304  strlen("group ")) == 0)
305  appendPQExpBuffer(secondsql, "GROUP %s;\n",
306  fmtId(grantee->data + strlen("group ")));
307  else
308  appendPQExpBuffer(secondsql, "%s;\n", fmtId(grantee->data));
309  }
310  if (privswgo->len > 0)
311  {
312  appendPQExpBuffer(secondsql, "%sGRANT %s ON %s ",
313  prefix, privswgo->data, type);
314  if (nspname && *nspname)
315  appendPQExpBuffer(secondsql, "%s.", fmtId(nspname));
316  appendPQExpBuffer(secondsql, "%s TO ", name);
317  if (grantee->len == 0)
318  appendPQExpBufferStr(secondsql, "PUBLIC");
319  else if (strncmp(grantee->data, "group ",
320  strlen("group ")) == 0)
321  appendPQExpBuffer(secondsql, "GROUP %s",
322  fmtId(grantee->data + strlen("group ")));
323  else
324  appendPQExpBufferStr(secondsql, fmtId(grantee->data));
325  appendPQExpBufferStr(secondsql, " WITH GRANT OPTION;\n");
326  }
327 
328  if (grantor->len > 0
329  && (!owner || strcmp(owner, grantor->data) != 0))
330  appendPQExpBufferStr(secondsql, "RESET SESSION AUTHORIZATION;\n");
331  }
332  }
333  }
334 
335  /*
336  * For systems prior to 9.6, if we didn't find any owner privs, the owner
337  * must have revoked 'em all.
338  *
339  * For 9.6 and above, we handle this through the 'racls'. See above.
340  */
341  if (remoteVersion < 90600 && !found_owner_privs && owner)
342  {
343  appendPQExpBuffer(firstsql, "%sREVOKE ALL", prefix);
344  if (subname)
345  appendPQExpBuffer(firstsql, "(%s)", subname);
346  appendPQExpBuffer(firstsql, " ON %s ", type);
347  if (nspname && *nspname)
348  appendPQExpBuffer(firstsql, "%s.", fmtId(nspname));
349  appendPQExpBuffer(firstsql, "%s FROM %s;\n",
350  name, fmtId(owner));
351  }
352 
353  destroyPQExpBuffer(grantee);
354  destroyPQExpBuffer(grantor);
355  destroyPQExpBuffer(privs);
356  destroyPQExpBuffer(privswgo);
357 
358  appendPQExpBuffer(sql, "%s%s", firstsql->data, secondsql->data);
359  destroyPQExpBuffer(firstsql);
360  destroyPQExpBuffer(secondsql);
361 
362  if (aclitems)
363  free(aclitems);
364 
365  if (raclitems)
366  free(raclitems);
367 
368  return ok;
369 }
void printfPQExpBuffer(PQExpBuffer str, const char *fmt,...)
Definition: pqexpbuffer.c:237
bool parsePGArray(const char *atext, char ***itemarray, int *nitems)
Definition: string_utils.c:657
const char * fmtId(const char *rawid)
Definition: string_utils.c:64
void appendPQExpBufferStr(PQExpBuffer str, const char *data)
Definition: pqexpbuffer.c:369
NameData subname
void destroyPQExpBuffer(PQExpBuffer str)
Definition: pqexpbuffer.c:116
void appendPQExpBuffer(PQExpBuffer str, const char *fmt,...)
Definition: pqexpbuffer.c:267
PQExpBuffer createPQExpBuffer(void)
Definition: pqexpbuffer.c:74
#define free(a)
Definition: header.h:65
#define Assert(condition)
Definition: c.h:804
const char * name
Definition: encode.c:515
int i
static bool parseAclItem(const char *item, const char *type, const char *name, const char *subname, int remoteVersion, PQExpBuffer grantee, PQExpBuffer grantor, PQExpBuffer privs, PQExpBuffer privswgo)
Definition: dumputils.c:455

◆ buildACLQueries()

void buildACLQueries ( PQExpBuffer  acl_subquery,
PQExpBuffer  racl_subquery,
PQExpBuffer  init_acl_subquery,
PQExpBuffer  init_racl_subquery,
const char *  acl_column,
const char *  acl_owner,
const char *  obj_kind,
bool  binary_upgrade 
)

Definition at line 725 of file dumputils.c.

References printfPQExpBuffer().

Referenced by dumpTable(), getAggregates(), getBlobs(), getDefaultACLs(), getForeignDataWrappers(), getForeignServers(), getFuncs(), getNamespaces(), getProcLangs(), getTables(), and getTypes().

729 {
730  /*
731  * To get the delta from what the permissions were at creation time
732  * (either initdb or CREATE EXTENSION) vs. what they are now, we have to
733  * look at two things:
734  *
735  * What privileges have been added, which we calculate by extracting all
736  * the current privileges (using the set of default privileges for the
737  * object type if current privileges are NULL) and then removing those
738  * which existed at creation time (again, using the set of default
739  * privileges for the object type if there were no creation time
740  * privileges).
741  *
742  * What privileges have been removed, which we calculate by extracting the
743  * privileges as they were at creation time (or the default privileges, as
744  * above), and then removing the current privileges (or the default
745  * privileges, if current privileges are NULL).
746  *
747  * As a good cross-check, both directions of these checks should result in
748  * the empty set if both the current ACL and the initial privs are NULL
749  * (meaning, in practice, that the default ACLs were there at init time
750  * and is what the current privileges are).
751  *
752  * We always perform this delta on all ACLs and expect that by the time
753  * these are run the initial privileges will be in place, even in a binary
754  * upgrade situation (see below).
755  *
756  * Finally, the order in which privileges are in the ACL string (the order
757  * they been GRANT'd in, which the backend maintains) must be preserved to
758  * ensure that GRANTs WITH GRANT OPTION and subsequent GRANTs based on
759  * those are dumped in the correct order.
760  */
761  printfPQExpBuffer(acl_subquery,
762  "(SELECT pg_catalog.array_agg(acl ORDER BY row_n) FROM "
763  "(SELECT acl, row_n FROM "
764  "pg_catalog.unnest(coalesce(%s,pg_catalog.acldefault(%s,%s))) "
765  "WITH ORDINALITY AS perm(acl,row_n) "
766  "WHERE NOT EXISTS ( "
767  "SELECT 1 FROM "
768  "pg_catalog.unnest(coalesce(pip.initprivs,pg_catalog.acldefault(%s,%s))) "
769  "AS init(init_acl) WHERE acl = init_acl)) as foo)",
770  acl_column,
771  obj_kind,
772  acl_owner,
773  obj_kind,
774  acl_owner);
775 
776  printfPQExpBuffer(racl_subquery,
777  "(SELECT pg_catalog.array_agg(acl ORDER BY row_n) FROM "
778  "(SELECT acl, row_n FROM "
779  "pg_catalog.unnest(coalesce(pip.initprivs,pg_catalog.acldefault(%s,%s))) "
780  "WITH ORDINALITY AS initp(acl,row_n) "
781  "WHERE NOT EXISTS ( "
782  "SELECT 1 FROM "
783  "pg_catalog.unnest(coalesce(%s,pg_catalog.acldefault(%s,%s))) "
784  "AS permp(orig_acl) WHERE acl = orig_acl)) as foo)",
785  obj_kind,
786  acl_owner,
787  acl_column,
788  obj_kind,
789  acl_owner);
790 
791  /*
792  * In binary upgrade mode we don't run the extension script but instead
793  * dump out the objects independently and then recreate them. To preserve
794  * the initial privileges which were set on extension objects, we need to
795  * grab the set of GRANT and REVOKE commands necessary to get from the
796  * default privileges of an object to the initial privileges as recorded
797  * in pg_init_privs.
798  *
799  * These will then be run ahead of the regular ACL commands, which were
800  * calculated using the queries above, inside of a block which sets a flag
801  * to indicate that the backend should record the results of these GRANT
802  * and REVOKE statements into pg_init_privs. This is how we preserve the
803  * contents of that catalog across binary upgrades.
804  */
805  if (binary_upgrade)
806  {
807  printfPQExpBuffer(init_acl_subquery,
808  "CASE WHEN privtype = 'e' THEN "
809  "(SELECT pg_catalog.array_agg(acl ORDER BY row_n) FROM "
810  "(SELECT acl, row_n FROM pg_catalog.unnest(pip.initprivs) "
811  "WITH ORDINALITY AS initp(acl,row_n) "
812  "WHERE NOT EXISTS ( "
813  "SELECT 1 FROM "
814  "pg_catalog.unnest(pg_catalog.acldefault(%s,%s)) "
815  "AS privm(orig_acl) WHERE acl = orig_acl)) as foo) END",
816  obj_kind,
817  acl_owner);
818 
819  printfPQExpBuffer(init_racl_subquery,
820  "CASE WHEN privtype = 'e' THEN "
821  "(SELECT pg_catalog.array_agg(acl) FROM "
822  "(SELECT acl, row_n FROM "
823  "pg_catalog.unnest(pg_catalog.acldefault(%s,%s)) "
824  "WITH ORDINALITY AS privp(acl,row_n) "
825  "WHERE NOT EXISTS ( "
826  "SELECT 1 FROM pg_catalog.unnest(pip.initprivs) "
827  "AS initp(init_acl) WHERE acl = init_acl)) as foo) END",
828  obj_kind,
829  acl_owner);
830  }
831  else
832  {
833  printfPQExpBuffer(init_acl_subquery, "NULL");
834  printfPQExpBuffer(init_racl_subquery, "NULL");
835  }
836 }
void printfPQExpBuffer(PQExpBuffer str, const char *fmt,...)
Definition: pqexpbuffer.c:237
static int binary_upgrade
Definition: pg_dumpall.c:68

◆ buildDefaultACLCommands()

bool buildDefaultACLCommands ( const char *  type,
const char *  nspname,
const char *  acls,
const char *  racls,
const char *  initacls,
const char *  initracls,
const char *  owner,
int  remoteVersion,
PQExpBuffer  sql 
)

Definition at line 384 of file dumputils.c.

References appendPQExpBuffer(), appendPQExpBufferStr(), buildACLCommands(), createPQExpBuffer(), PQExpBufferData::data, destroyPQExpBuffer(), and fmtId().

Referenced by dumpDefaultACL().

390 {
391  PQExpBuffer prefix;
392 
393  prefix = createPQExpBuffer();
394 
395  /*
396  * We incorporate the target role directly into the command, rather than
397  * playing around with SET ROLE or anything like that. This is so that a
398  * permissions error leads to nothing happening, rather than changing
399  * default privileges for the wrong user.
400  */
401  appendPQExpBuffer(prefix, "ALTER DEFAULT PRIVILEGES FOR ROLE %s ",
402  fmtId(owner));
403  if (nspname)
404  appendPQExpBuffer(prefix, "IN SCHEMA %s ", fmtId(nspname));
405 
406  if (strlen(initacls) != 0 || strlen(initracls) != 0)
407  {
408  appendPQExpBufferStr(sql, "SELECT pg_catalog.binary_upgrade_set_record_init_privs(true);\n");
409  if (!buildACLCommands("", NULL, NULL, type,
410  initacls, initracls, owner,
411  prefix->data, remoteVersion, sql))
412  {
413  destroyPQExpBuffer(prefix);
414  return false;
415  }
416  appendPQExpBufferStr(sql, "SELECT pg_catalog.binary_upgrade_set_record_init_privs(false);\n");
417  }
418 
419  if (!buildACLCommands("", NULL, NULL, type,
420  acls, racls, owner,
421  prefix->data, remoteVersion, sql))
422  {
423  destroyPQExpBuffer(prefix);
424  return false;
425  }
426 
427  destroyPQExpBuffer(prefix);
428 
429  return true;
430 }
const char * fmtId(const char *rawid)
Definition: string_utils.c:64
void appendPQExpBufferStr(PQExpBuffer str, const char *data)
Definition: pqexpbuffer.c:369
void destroyPQExpBuffer(PQExpBuffer str)
Definition: pqexpbuffer.c:116
void appendPQExpBuffer(PQExpBuffer str, const char *fmt,...)
Definition: pqexpbuffer.c:267
PQExpBuffer createPQExpBuffer(void)
Definition: pqexpbuffer.c:74
bool buildACLCommands(const char *name, const char *subname, const char *nspname, const char *type, const char *acls, const char *racls, const char *owner, const char *prefix, int remoteVersion, PQExpBuffer sql)
Definition: dumputils.c:58

◆ buildShSecLabelQuery()

void buildShSecLabelQuery ( const char *  catalog_name,
Oid  objectId,
PQExpBuffer  sql 
)

Definition at line 671 of file dumputils.c.

References appendPQExpBuffer().

Referenced by buildShSecLabels(), and dumpDatabase().

673 {
674  appendPQExpBuffer(sql,
675  "SELECT provider, label FROM pg_catalog.pg_shseclabel "
676  "WHERE classoid = 'pg_catalog.%s'::pg_catalog.regclass "
677  "AND objoid = '%u'", catalog_name, objectId);
678 }
void appendPQExpBuffer(PQExpBuffer str, const char *fmt,...)
Definition: pqexpbuffer.c:267

◆ emitShSecLabels()

void emitShSecLabels ( PGconn conn,
PGresult res,
PQExpBuffer  buffer,
const char *  objtype,
const char *  objname 
)

Definition at line 689 of file dumputils.c.

References appendPQExpBuffer(), appendPQExpBufferStr(), appendStringLiteralConn(), fmtId(), i, label, PQgetvalue(), PQntuples(), and provider.

Referenced by buildShSecLabels(), and dumpDatabase().

691 {
692  int i;
693 
694  for (i = 0; i < PQntuples(res); i++)
695  {
696  char *provider = PQgetvalue(res, i, 0);
697  char *label = PQgetvalue(res, i, 1);
698 
699  /* must use fmtId result before calling it again */
700  appendPQExpBuffer(buffer,
701  "SECURITY LABEL FOR %s ON %s",
702  fmtId(provider), objtype);
703  appendPQExpBuffer(buffer,
704  " %s IS ",
705  fmtId(objname));
706  appendStringLiteralConn(buffer, label, conn);
707  appendPQExpBufferStr(buffer, ";\n");
708  }
709 }
char * PQgetvalue(const PGresult *res, int tup_num, int field_num)
Definition: fe-exec.c:3561
const char * fmtId(const char *rawid)
Definition: string_utils.c:64
void appendPQExpBufferStr(PQExpBuffer str, const char *data)
Definition: pqexpbuffer.c:369
int PQntuples(const PGresult *res)
Definition: fe-exec.c:3167
void appendPQExpBuffer(PQExpBuffer str, const char *fmt,...)
Definition: pqexpbuffer.c:267
static JitProviderCallbacks provider
Definition: jit.c:43
static char * label
void appendStringLiteralConn(PQExpBuffer buf, const char *str, PGconn *conn)
Definition: string_utils.c:293
int i

◆ makeAlterConfigCommand()

void makeAlterConfigCommand ( PGconn conn,
const char *  configitem,
const char *  type,
const char *  name,
const char *  type2,
const char *  name2,
PQExpBuffer  buf 
)

Definition at line 983 of file dumputils.c.

References appendPQExpBuffer(), appendPQExpBufferStr(), appendStringLiteralConn(), fmtId(), pg_free(), pg_strdup(), SplitGUCList(), and variable_is_guc_list_quote().

Referenced by dumpDatabaseConfig(), and dumpUserConfig().

987 {
988  char *mine;
989  char *pos;
990 
991  /* Parse the configitem. If we can't find an "=", silently do nothing. */
992  mine = pg_strdup(configitem);
993  pos = strchr(mine, '=');
994  if (pos == NULL)
995  {
996  pg_free(mine);
997  return;
998  }
999  *pos++ = '\0';
1000 
1001  /* Build the command, with suitable quoting for everything. */
1002  appendPQExpBuffer(buf, "ALTER %s %s ", type, fmtId(name));
1003  if (type2 != NULL && name2 != NULL)
1004  appendPQExpBuffer(buf, "IN %s %s ", type2, fmtId(name2));
1005  appendPQExpBuffer(buf, "SET %s TO ", fmtId(mine));
1006 
1007  /*
1008  * Variables that are marked GUC_LIST_QUOTE were already fully quoted by
1009  * flatten_set_variable_args() before they were put into the setconfig
1010  * array. However, because the quoting rules used there aren't exactly
1011  * like SQL's, we have to break the list value apart and then quote the
1012  * elements as string literals. (The elements may be double-quoted as-is,
1013  * but we can't just feed them to the SQL parser; it would do the wrong
1014  * thing with elements that are zero-length or longer than NAMEDATALEN.)
1015  *
1016  * Variables that are not so marked should just be emitted as simple
1017  * string literals. If the variable is not known to
1018  * variable_is_guc_list_quote(), we'll do that; this makes it unsafe to
1019  * use GUC_LIST_QUOTE for extension variables.
1020  */
1021  if (variable_is_guc_list_quote(mine))
1022  {
1023  char **namelist;
1024  char **nameptr;
1025 
1026  /* Parse string into list of identifiers */
1027  /* this shouldn't fail really */
1028  if (SplitGUCList(pos, ',', &namelist))
1029  {
1030  for (nameptr = namelist; *nameptr; nameptr++)
1031  {
1032  if (nameptr != namelist)
1033  appendPQExpBufferStr(buf, ", ");
1034  appendStringLiteralConn(buf, *nameptr, conn);
1035  }
1036  }
1037  pg_free(namelist);
1038  }
1039  else
1040  appendStringLiteralConn(buf, pos, conn);
1041 
1042  appendPQExpBufferStr(buf, ";\n");
1043 
1044  pg_free(mine);
1045 }
const char * fmtId(const char *rawid)
Definition: string_utils.c:64
bool variable_is_guc_list_quote(const char *name)
Definition: dumputils.c:849
void appendPQExpBufferStr(PQExpBuffer str, const char *data)
Definition: pqexpbuffer.c:369
void appendPQExpBuffer(PQExpBuffer str, const char *fmt,...)
Definition: pqexpbuffer.c:267
bool SplitGUCList(char *rawstring, char separator, char ***namelist)
Definition: dumputils.c:883
char * pg_strdup(const char *in)
Definition: fe_memutils.c:85
void pg_free(void *ptr)
Definition: fe_memutils.c:105
const char * name
Definition: encode.c:515
void appendStringLiteralConn(PQExpBuffer buf, const char *str, PGconn *conn)
Definition: string_utils.c:293

◆ SplitGUCList()

bool SplitGUCList ( char *  rawstring,
char  separator,
char ***  namelist 
)

Definition at line 883 of file dumputils.c.

References pg_malloc().

Referenced by makeAlterConfigCommand().

885 {
886  char *nextp = rawstring;
887  bool done = false;
888  char **nextptr;
889 
890  /*
891  * Since we disallow empty identifiers, this is a conservative
892  * overestimate of the number of pointers we could need. Allow one for
893  * list terminator.
894  */
895  *namelist = nextptr = (char **)
896  pg_malloc((strlen(rawstring) / 2 + 2) * sizeof(char *));
897  *nextptr = NULL;
898 
899  while (isspace((unsigned char) *nextp))
900  nextp++; /* skip leading whitespace */
901 
902  if (*nextp == '\0')
903  return true; /* allow empty string */
904 
905  /* At the top of the loop, we are at start of a new identifier. */
906  do
907  {
908  char *curname;
909  char *endp;
910 
911  if (*nextp == '"')
912  {
913  /* Quoted name --- collapse quote-quote pairs */
914  curname = nextp + 1;
915  for (;;)
916  {
917  endp = strchr(nextp + 1, '"');
918  if (endp == NULL)
919  return false; /* mismatched quotes */
920  if (endp[1] != '"')
921  break; /* found end of quoted name */
922  /* Collapse adjacent quotes into one quote, and look again */
923  memmove(endp, endp + 1, strlen(endp));
924  nextp = endp;
925  }
926  /* endp now points at the terminating quote */
927  nextp = endp + 1;
928  }
929  else
930  {
931  /* Unquoted name --- extends to separator or whitespace */
932  curname = nextp;
933  while (*nextp && *nextp != separator &&
934  !isspace((unsigned char) *nextp))
935  nextp++;
936  endp = nextp;
937  if (curname == nextp)
938  return false; /* empty unquoted name not allowed */
939  }
940 
941  while (isspace((unsigned char) *nextp))
942  nextp++; /* skip trailing whitespace */
943 
944  if (*nextp == separator)
945  {
946  nextp++;
947  while (isspace((unsigned char) *nextp))
948  nextp++; /* skip leading whitespace for next */
949  /* we expect another name, so done remains false */
950  }
951  else if (*nextp == '\0')
952  done = true;
953  else
954  return false; /* invalid syntax */
955 
956  /* Now safe to overwrite separator with a null */
957  *endp = '\0';
958 
959  /*
960  * Finished isolating current name --- add it to output array
961  */
962  *nextptr++ = curname;
963 
964  /* Loop back if we didn't reach end of string */
965  } while (!done);
966 
967  *nextptr = NULL;
968  return true;
969 }
void * pg_malloc(size_t size)
Definition: fe_memutils.c:47

◆ variable_is_guc_list_quote()

bool variable_is_guc_list_quote ( const char *  name)

Definition at line 849 of file dumputils.c.

References pg_strcasecmp().

Referenced by dumpFunc(), and makeAlterConfigCommand().

850 {
851  if (pg_strcasecmp(name, "local_preload_libraries") == 0 ||
852  pg_strcasecmp(name, "search_path") == 0 ||
853  pg_strcasecmp(name, "session_preload_libraries") == 0 ||
854  pg_strcasecmp(name, "shared_preload_libraries") == 0 ||
855  pg_strcasecmp(name, "temp_tablespaces") == 0 ||
856  pg_strcasecmp(name, "unix_socket_directories") == 0)
857  return true;
858  else
859  return false;
860 }
int pg_strcasecmp(const char *s1, const char *s2)
Definition: pgstrcasecmp.c:36
const char * name
Definition: encode.c:515