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eeece9e609
There was a wild mix of calling conventions: Some were declared to return void and didn't return, some returned an int exit code, some claimed to return an exit code, which the callers checked, but actually never returned, and so on. Now all of these functions are declared to return void and decorated with attribute noreturn and don't return. That's easiest, and most code already worked that way.
138 lines
3.2 KiB
C
138 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) 1996-2012, 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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