PostgreSQL Source Code  git master
fsmfuncs.c File Reference
#include "postgres.h"
#include "funcapi.h"
#include "lib/stringinfo.h"
#include "miscadmin.h"
#include "pageinspect.h"
#include "storage/fsm_internals.h"
#include "utils/builtins.h"
Include dependency graph for fsmfuncs.c:

Go to the source code of this file.

Functions

 PG_FUNCTION_INFO_V1 (fsm_page_contents)
 
Datum fsm_page_contents (PG_FUNCTION_ARGS)
 

Function Documentation

◆ fsm_page_contents()

Datum fsm_page_contents ( PG_FUNCTION_ARGS  )

Definition at line 35 of file fsmfuncs.c.

36 {
37  bytea *raw_page = PG_GETARG_BYTEA_P(0);
38  StringInfoData sinfo;
39  Page page;
40  FSMPage fsmpage;
41  int i;
42 
43  if (!superuser())
44  ereport(ERROR,
45  (errcode(ERRCODE_INSUFFICIENT_PRIVILEGE),
46  errmsg("must be superuser to use raw page functions")));
47 
48  page = get_page_from_raw(raw_page);
49 
50  if (PageIsNew(page))
52 
53  fsmpage = (FSMPage) PageGetContents(page);
54 
55  initStringInfo(&sinfo);
56 
57  for (i = 0; i < NodesPerPage; i++)
58  {
59  if (fsmpage->fp_nodes[i] != 0)
60  appendStringInfo(&sinfo, "%d: %d\n", i, fsmpage->fp_nodes[i]);
61  }
62  appendStringInfo(&sinfo, "fp_next_slot: %d\n", fsmpage->fp_next_slot);
63 
65 }
static char * PageGetContents(Page page)
Definition: bufpage.h:254
Pointer Page
Definition: bufpage.h:78
static bool PageIsNew(Page page)
Definition: bufpage.h:230
int errcode(int sqlerrcode)
Definition: elog.c:695
int errmsg(const char *fmt,...)
Definition: elog.c:906
#define ERROR
Definition: elog.h:35
#define ereport(elevel,...)
Definition: elog.h:145
#define PG_RETURN_NULL()
Definition: fmgr.h:345
#define PG_RETURN_TEXT_P(x)
Definition: fmgr.h:372
#define PG_GETARG_BYTEA_P(n)
Definition: fmgr.h:335
#define NodesPerPage
Definition: fsm_internals.h:51
FSMPageData * FSMPage
Definition: fsm_internals.h:45
int i
Definition: isn.c:73
Page get_page_from_raw(bytea *raw_page)
Definition: rawpage.c:215
void appendStringInfo(StringInfo str, const char *fmt,...)
Definition: stringinfo.c:91
void initStringInfo(StringInfo str)
Definition: stringinfo.c:59
uint8 fp_nodes[FLEXIBLE_ARRAY_MEMBER]
Definition: fsm_internals.h:42
Definition: c.h:623
bool superuser(void)
Definition: superuser.c:46
text * cstring_to_text_with_len(const char *s, int len)
Definition: varlena.c:201

References appendStringInfo(), cstring_to_text_with_len(), StringInfoData::data, ereport, errcode(), errmsg(), ERROR, FSMPageData::fp_next_slot, FSMPageData::fp_nodes, get_page_from_raw(), i, initStringInfo(), StringInfoData::len, NodesPerPage, PageGetContents(), PageIsNew(), PG_GETARG_BYTEA_P, PG_RETURN_NULL, PG_RETURN_TEXT_P, and superuser().

◆ PG_FUNCTION_INFO_V1()

PG_FUNCTION_INFO_V1 ( fsm_page_contents  )