PostgreSQL Source Code: src/fe_utils/option_utils.c Source File

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option_utils.c
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1/*-------------------------------------------------------------------------
2 *
3 * Command line option processing facilities for frontend code
4 *
5 * Portions Copyright (c) 1996-2025, PostgreSQL Global Development Group
6 * Portions Copyright (c) 1994, Regents of the University of California
7 *
8 * src/fe_utils/option_utils.c
9 *
10 *-------------------------------------------------------------------------
11 */
12
13#include "postgres_fe.h"
14
15#include "common/logging.h"
16#include "common/string.h"
17#include "fe_utils/option_utils.h"
18
19/*
20 * Provide strictly harmonized handling of --help and --version
21 * options.
22 */
23void
24 handle_help_version_opts(int argc, char *argv[],
25 const char *fixed_progname, help_handler hlp)
26{
27 if (argc > 1)
28 {
29 if (strcmp(argv[1], "--help") == 0 || strcmp(argv[1], "-?") == 0)
30 {
31 hlp(get_progname(argv[0]));
32 exit(0);
33 }
34 if (strcmp(argv[1], "--version") == 0 || strcmp(argv[1], "-V") == 0)
35 {
36 printf("%s (PostgreSQL) " PG_VERSION "\n", fixed_progname);
37 exit(0);
38 }
39 }
40}
41
42/*
43 * option_parse_int
44 *
45 * Parse integer value for an option. If the parsing is successful, returns
46 * true and stores the result in *result if that's given; if parsing fails,
47 * returns false.
48 */
49bool
50 option_parse_int(const char *optarg, const char *optname,
51 int min_range, int max_range,
52 int *result)
53{
54 char *endptr;
55 int val;
56
57 errno = 0;
58 val = strtoint(optarg, &endptr, 10);
59
60 /*
61 * Skip any trailing whitespace; if anything but whitespace remains before
62 * the terminating character, fail.
63 */
64 while (*endptr != '0円' && isspace((unsigned char) *endptr))
65 endptr++;
66
67 if (*endptr != '0円')
68 {
69 pg_log_error("invalid value \"%s\" for option %s",
70 optarg, optname);
71 return false;
72 }
73
74 if (errno == ERANGE || val < min_range || val > max_range)
75 {
76 pg_log_error("%s must be in range %d..%d",
77 optname, min_range, max_range);
78 return false;
79 }
80
81 if (result)
82 *result = val;
83 return true;
84}
85
86/*
87 * Provide strictly harmonized handling of the --sync-method option.
88 */
89bool
90 parse_sync_method(const char *optarg, DataDirSyncMethod *sync_method)
91{
92 if (strcmp(optarg, "fsync") == 0)
93 *sync_method = DATA_DIR_SYNC_METHOD_FSYNC;
94 else if (strcmp(optarg, "syncfs") == 0)
95 {
96#ifdef HAVE_SYNCFS
97 *sync_method = DATA_DIR_SYNC_METHOD_SYNCFS;
98#else
99 pg_log_error("this build does not support sync method \"%s\"",
100 "syncfs");
101 return false;
102#endif
103 }
104 else
105 {
106 pg_log_error("unrecognized sync method: %s", optarg);
107 return false;
108 }
109
110 return true;
111}
DataDirSyncMethod
Definition: file_utils.h:28
@ DATA_DIR_SYNC_METHOD_SYNCFS
Definition: file_utils.h:30
@ DATA_DIR_SYNC_METHOD_FSYNC
Definition: file_utils.h:29
long val
Definition: informix.c:689
static DataDirSyncMethod sync_method
Definition: initdb.c:170
#define pg_log_error(...)
Definition: logging.h:106
bool option_parse_int(const char *optarg, const char *optname, int min_range, int max_range, int *result)
Definition: option_utils.c:50
void handle_help_version_opts(int argc, char *argv[], const char *fixed_progname, help_handler hlp)
Definition: option_utils.c:24
bool parse_sync_method(const char *optarg, DataDirSyncMethod *sync_method)
Definition: option_utils.c:90
void(* help_handler)(const char *progname)
Definition: option_utils.h:17
PGDLLIMPORT char * optarg
Definition: getopt.c:53
const char * get_progname(const char *argv0)
Definition: path.c:652
#define printf(...)
Definition: port.h:245
int strtoint(const char *pg_restrict str, char **pg_restrict endptr, int base)
Definition: string.c:50

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