139 lines
3.2 KiB
C
139 lines
3.2 KiB
C
/*-------------------------------------------------------------------------
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* help_config.c
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*
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* Displays available options under grand unified configuration scheme
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*
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* Options whose flag bits are set to GUC_NO_SHOW_ALL, GUC_NOT_IN_SAMPLE,
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* or GUC_DISALLOW_IN_FILE are not displayed, unless the user specifically
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* requests that variable by name
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*
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* Portions Copyright (c) 1996-2015, PostgreSQL Global Development Group
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*
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* IDENTIFICATION
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* src/backend/utils/misc/help_config.c
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*
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*-------------------------------------------------------------------------
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*/
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#include "postgres.h"
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#include <float.h>
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#include <limits.h>
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#include <unistd.h>
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#include "utils/guc_tables.h"
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#include "utils/help_config.h"
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/*
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* This union allows us to mix the numerous different types of structs
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* that we are organizing.
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*/
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typedef union
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{
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struct config_generic generic;
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struct config_bool bool;
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struct config_real real;
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struct config_int integer;
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struct config_string string;
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struct config_enum _enum;
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} mixedStruct;
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static void printMixedStruct(mixedStruct *structToPrint);
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static bool displayStruct(mixedStruct *structToDisplay);
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void
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GucInfoMain(void)
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{
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struct config_generic **guc_vars;
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int numOpts,
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i;
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/* Initialize the guc_variables[] array */
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build_guc_variables();
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guc_vars = get_guc_variables();
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numOpts = GetNumConfigOptions();
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for (i = 0; i < numOpts; i++)
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{
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mixedStruct *var = (mixedStruct *) guc_vars[i];
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if (displayStruct(var))
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printMixedStruct(var);
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}
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exit(0);
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}
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/*
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* This function will return true if the struct passed to it
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* should be displayed to the user.
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*/
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static bool
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displayStruct(mixedStruct *structToDisplay)
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{
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return !(structToDisplay->generic.flags & (GUC_NO_SHOW_ALL |
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GUC_NOT_IN_SAMPLE |
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GUC_DISALLOW_IN_FILE));
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}
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/*
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* This function prints out the generic struct passed to it. It will print out
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* a different format, depending on what the user wants to see.
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*/
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static void
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printMixedStruct(mixedStruct *structToPrint)
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{
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printf("%s\t%s\t%s\t",
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structToPrint->generic.name,
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GucContext_Names[structToPrint->generic.context],
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_(config_group_names[structToPrint->generic.group]));
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switch (structToPrint->generic.vartype)
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{
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case PGC_BOOL:
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printf("BOOLEAN\t%s\t\t\t",
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(structToPrint->bool.reset_val == 0) ?
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"FALSE" : "TRUE");
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break;
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case PGC_INT:
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printf("INTEGER\t%d\t%d\t%d\t",
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structToPrint->integer.reset_val,
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structToPrint->integer.min,
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structToPrint->integer.max);
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break;
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case PGC_REAL:
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printf("REAL\t%g\t%g\t%g\t",
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structToPrint->real.reset_val,
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structToPrint->real.min,
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structToPrint->real.max);
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break;
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case PGC_STRING:
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printf("STRING\t%s\t\t\t",
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structToPrint->string.boot_val ? structToPrint->string.boot_val : "");
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break;
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case PGC_ENUM:
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printf("ENUM\t%s\t\t\t",
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config_enum_lookup_by_value(&structToPrint->_enum,
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structToPrint->_enum.boot_val));
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break;
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default:
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write_stderr("internal error: unrecognized run-time parameter type\n");
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break;
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}
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printf("%s\t%s\n",
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(structToPrint->generic.short_desc == NULL) ? "" : _(structToPrint->generic.short_desc),
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(structToPrint->generic.long_desc == NULL) ? "" : _(structToPrint->generic.long_desc));
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}
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