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btrfs-progs: move help implemetnation to own file 

Signed-off-by: David Sterba <dsterba@suse.com>
master
David Sterba 2017-01-25 16:35:00 +01:00
parent 1c880f34f1
commit a52537a594
2 changed files with 96 additions and 98 deletions
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96
help.c
View File

@ -18,6 +18,7 @@
#include <stdlib.h>
#include <string.h>
#include <limits.h>
#include <getopt.h>
#include "commands.h"
#include "utils.h"
@ -28,6 +29,101 @@
#define USAGE_OPTIONS 4U
#define USAGE_LISTING 8U
static char argv0_buf[ARGV0_BUF_SIZE] = "btrfs";
const char *get_argv0_buf(void)
{
return argv0_buf;
}
void fixup_argv0(char **argv, const char *token)
{
int len = strlen(argv0_buf);
snprintf(argv0_buf + len, sizeof(argv0_buf) - len, " %s", token);
argv[0] = argv0_buf;
}
void set_argv0(char **argv)
{
strncpy(argv0_buf, argv[0], sizeof(argv0_buf));
argv0_buf[sizeof(argv0_buf) - 1] = 0;
}
int check_argc_exact(int nargs, int expected)
{
if (nargs < expected)
fprintf(stderr, "%s: too few arguments\n", argv0_buf);
if (nargs > expected)
fprintf(stderr, "%s: too many arguments\n", argv0_buf);
return nargs != expected;
}
int check_argc_min(int nargs, int expected)
{
if (nargs < expected) {
fprintf(stderr, "%s: too few arguments\n", argv0_buf);
return 1;
}
return 0;
}
int check_argc_max(int nargs, int expected)
{
if (nargs > expected) {
fprintf(stderr, "%s: too many arguments\n", argv0_buf);
return 1;
}
return 0;
}
/*
* Preprocess @argv with getopt_long to reorder options and consume the "--"
* option separator.
* Unknown short and long options are reported, optionally the @usage is printed
* before exit.
*/
void clean_args_no_options(int argc, char *argv[], const char * const *usagestr)
{
static const struct option long_options[] = {
{NULL, 0, NULL, 0}
};
while (1) {
int c = getopt_long(argc, argv, "", long_options, NULL);
if (c < 0)
break;
switch (c) {
default:
if (usagestr)
usage(usagestr);
}
}
}
/*
* Same as clean_args_no_options but pass through arguments that could look
* like short options. Eg. reisze which takes a negative resize argument like
* '-123M' .
*
* This accepts only two forms:
* - "-- option1 option2 ..."
* - "option1 option2 ..."
*/
void clean_args_no_options_relaxed(int argc, char *argv[], const char * const *usagestr)
{
if (argc <= 1)
return;
if (strcmp(argv[1], "--") == 0)
optind = 2;
}
static int do_usage_one_command(const char * const *usagestr,
unsigned int flags, FILE *outf)
{

98
utils.c
View File

@ -37,7 +37,6 @@
#include <sys/vfs.h>
#include <sys/statfs.h>
#include <linux/magic.h>
#include <getopt.h>
#include <sys/utsname.h>
#include <linux/version.h>
@ -51,7 +50,6 @@
#include "volumes.h"
#include "ioctl.h"
#include "commands.h"
#include "help.h"
#ifndef BLKDISCARD
#define BLKDISCARD _IO(0x12,119)
@ -59,63 +57,11 @@
static int btrfs_scan_done = 0;
static char argv0_buf[ARGV0_BUF_SIZE] = "btrfs";
static int rand_seed_initlized = 0;
static unsigned short rand_seed[3];
struct btrfs_config bconf;
const char *get_argv0_buf(void)
{
return argv0_buf;
}
void fixup_argv0(char **argv, const char *token)
{
int len = strlen(argv0_buf);
snprintf(argv0_buf + len, sizeof(argv0_buf) - len, " %s", token);
argv[0] = argv0_buf;
}
void set_argv0(char **argv)
{
strncpy(argv0_buf, argv[0], sizeof(argv0_buf));
argv0_buf[sizeof(argv0_buf) - 1] = 0;
}
int check_argc_exact(int nargs, int expected)
{
if (nargs < expected)
fprintf(stderr, "%s: too few arguments\n", argv0_buf);
if (nargs > expected)
fprintf(stderr, "%s: too many arguments\n", argv0_buf);
return nargs != expected;
}
int check_argc_min(int nargs, int expected)
{
if (nargs < expected) {
fprintf(stderr, "%s: too few arguments\n", argv0_buf);
return 1;
}
return 0;
}
int check_argc_max(int nargs, int expected)
{
if (nargs > expected) {
fprintf(stderr, "%s: too many arguments\n", argv0_buf);
return 1;
}
return 0;
}
/*
* Discard the given range in one go
*/
@ -4070,50 +4016,6 @@ int string_is_numerical(const char *str)
return 1;
}
/*
* Preprocess @argv with getopt_long to reorder options and consume the "--"
* option separator.
* Unknown short and long options are reported, optionally the @usage is printed
* before exit.
*/
void clean_args_no_options(int argc, char *argv[], const char * const *usagestr)
{
static const struct option long_options[] = {
{NULL, 0, NULL, 0}
};
while (1) {
int c = getopt_long(argc, argv, "", long_options, NULL);
if (c < 0)
break;
switch (c) {
default:
if (usagestr)
usage(usagestr);
}
}
}
/*
* Same as clean_args_no_options but pass through arguments that could look
* like short options. Eg. reisze which takes a negative resize argument like
* '-123M' .
*
* This accepts only two forms:
* - "-- option1 option2 ..."
* - "option1 option2 ..."
*/
void clean_args_no_options_relaxed(int argc, char *argv[], const char * const *usagestr)
{
if (argc <= 1)
return;
if (strcmp(argv[1], "--") == 0)
optind = 2;
}
/* Subvolume helper functions */
/*
* test if name is a correct subvolume name