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Merge pull request #147 from trapexit/usage

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provide usage text and version info. closes #146
This commit is contained in:
Antonio SJ Musumeci 2015-09-29 07:30:02 -04:00
commit 746bb68a0c
1 changed files with 70 additions and 3 deletions
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73
src/option_parser.cpp
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@ -28,21 +28,30 @@
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string>
#include <vector>
#include <sstream>
#include <iostream>
#include <iomanip>
#include "str.hpp"
#include "num.hpp"
#include "config.hpp"
#include "num.hpp"
#include "policy.hpp"
#include "str.hpp"
#include "version.hpp"
using std::string;
using std::vector;
using namespace mergerfs;
enum
{
MERGERFS_OPT_HELP,
MERGERFS_OPT_VERSION
};
static
void
set_option(fuse_args &args,
@ -233,6 +242,43 @@ process_destmounts(const char *arg,
return 1;
}
static
void
usage(void)
{
std::cout <<
"Usage: mergerfs [options] <srcpaths> <destpath>\n"
"\n"
" -o [opt,...] mount options\n"
" -h --help print help\n"
" -v --version print version\n"
"\n"
"mergerfs options:\n"
" <srcpaths> ':' delimited list of directories. Supports\n"
" shell globbing (must be escaped in shell)\n"
" -o defaults default FUSE options which seem to provide the\n"
" best performance: atomic_o_trunc, auto_cache,\n"
" big_writes, default_permissions, splice_read,\n"
" splice_write, splice_move\n"
" -o direct_io bypass additional caching, increases write\n"
" speeds at the cost of reads\n"
" -o minfreespace=<int> minimum free space needed for certain policies:\n"
" default 4G\n"
" -o moveonenospc=<bool> try to move file to another drive when ENOSPC\n"
" on write: default false\n"
" -o func.<f>=<p> set function <f> to policy <p>\n"
" -o category.<c>=<p> set functions in category <c> to <p>\n"
<< std::endl;
}
static
void
version(void)
{
std::cout << "mergerfs version: " << MERGERFS_VERSION
<< std::endl;
}
static
int
option_processor(void *data,
@ -255,6 +301,18 @@ option_processor(void *data,
process_destmounts(arg,config);
break;
case MERGERFS_OPT_HELP:
usage();
close(2);
dup(1);
fuse_opt_add_arg(outargs,"-ho");
break;
case MERGERFS_OPT_VERSION:
version();
fuse_opt_add_arg(outargs,"--version");
break;
default:
break;
}
@ -270,10 +328,19 @@ namespace mergerfs
parse(fuse_args &args,
Config &config)
{
const struct fuse_opt opts[] =
{
FUSE_OPT_KEY("-h",MERGERFS_OPT_HELP),
FUSE_OPT_KEY("--help",MERGERFS_OPT_HELP),
FUSE_OPT_KEY("-v",MERGERFS_OPT_VERSION),
FUSE_OPT_KEY("--version",MERGERFS_OPT_VERSION),
FUSE_OPT_END
};
fuse_opt_parse(&args,
&config,
NULL,
opts,
::option_processor);
set_fsname(args,config.srcmounts);