39c63831a0
Some commands could be run in a dry-run mode, i.e. not doing any write/change actions, only printing the steps and ignoring errors. There are two possibilities where to put the option: - as a global one: btrfs --dry-run subvolume delete /path - local option: btrfs subvolume delete --dry-run /path As we have several global options already, let's put it there, dry-run should not be very common so the slight inconvenience of writing the option out of order of command arguments should be acceptable. Issue: #629 Signed-off-by: David Sterba <dsterba@suse.com>
132 lines
4.6 KiB
C
132 lines
4.6 KiB
C
/*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public
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* License v2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public
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* License along with this program; if not, write to the
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* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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* Boston, MA 021110-1307, USA.
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*/
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#ifndef __BTRFS_HELP_H__
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#define __BTRFS_HELP_H__
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#include <limits.h>
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#include <stdbool.h>
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struct cmd_struct;
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struct cmd_group;
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/* User defined long options first option */
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#define GETOPT_VAL_FIRST 256
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#define GETOPT_VAL_SI 512
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#define GETOPT_VAL_IEC 513
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#define GETOPT_VAL_RAW 514
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#define GETOPT_VAL_HUMAN_READABLE 515
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#define GETOPT_VAL_KBYTES 516
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#define GETOPT_VAL_MBYTES 517
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#define GETOPT_VAL_GBYTES 518
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#define GETOPT_VAL_TBYTES 519
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#define GETOPT_VAL_HELP 520
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#define GETOPT_VAL_PARAM 521
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#define GETOPT_VAL_DRY_RUN 522
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#define ARGV0_BUF_SIZE PATH_MAX
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#define HELPINFO_UNITS_LONG \
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OPTLINE("--raw", "raw numbers in bytes"), \
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OPTLINE("--human-readable", "human friendly numbers, base 1024 (default)"), \
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OPTLINE("--iec", "use 1024 as a base (KiB, MiB, GiB, TiB)"), \
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OPTLINE("--si", "use 1000 as a base (kB, MB, GB, TB)"), \
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OPTLINE("--kbytes", "show sizes in KiB, or kB with --si"), \
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OPTLINE("--mbytes", "show sizes in MiB, or MB with --si"), \
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OPTLINE("--gbytes", "show sizes in GiB, or GB with --si"), \
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OPTLINE("--tbytes", "show sizes in TiB, or TB with --si")
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#define HELPINFO_UNITS_SHORT_LONG \
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OPTLINE("-b|--raw", "raw numbers in bytes"), \
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OPTLINE("-h|--human-readable", "human friendly numbers, base 1024 (default)"), \
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OPTLINE("-H", "human friendly numbers, base 1000"), \
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OPTLINE("--iec", "use 1024 as a base (KiB, MiB, GiB, TiB)"), \
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OPTLINE("--si", "use 1000 as a base (kB, MB, GB, TB)"), \
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OPTLINE("-k|--kbytes", "show sizes in KiB, or kB with --si"), \
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OPTLINE("-m|--mbytes", "show sizes in MiB, or MB with --si"), \
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OPTLINE("-g|--gbytes", "show sizes in GiB, or GB with --si"), \
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OPTLINE("-t|--tbytes", "show sizes in TiB, or TB with --si")
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#define HELPINFO_OPTION "\x01"
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#define HELPINFO_DESC "\x02"
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/* Keep the line length below 100 chars. */
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#define HELPINFO_PREFIX_WIDTH 4
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#define HELPINFO_LISTING_WIDTH 8
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#define HELPINFO_OPTION_WIDTH 24
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#define HELPINFO_OPTION_MARGIN 2
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#define HELPINFO_DESC_PREFIX (HELPINFO_PREFIX_WIDTH + \
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HELPINFO_OPTION_WIDTH + \
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HELPINFO_OPTION_MARGIN)
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#define HELPINFO_DESC_WIDTH 99 - HELPINFO_DESC_PREFIX
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#define OPTLINE(opt, text) HELPINFO_OPTION opt HELPINFO_DESC text
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/*
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* Special marker in the help strings that will preemptively insert the global
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* options and then continue with the following text that possibly follows
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* after the regular options
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*/
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#define HELPINFO_INSERT_GLOBALS "", \
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"Global options:"
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#define HELPINFO_INSERT_FORMAT "--format TYPE"
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#define HELPINFO_INSERT_DRY_RUN OPTLINE("--dry-run", "do not do any active/changing actions")
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#define HELPINFO_INSERT_VERBOSE OPTLINE("-v|--verbose", "increase output verbosity")
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#define HELPINFO_INSERT_QUIET OPTLINE("-q|--quiet", "print only errors")
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/*
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* Descriptor of output format
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*/
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struct format_desc {
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unsigned int value;
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char name[8];
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};
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extern const struct format_desc output_formats[2];
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const char *output_format_name(unsigned int value);
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__attribute__((noreturn))
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void usage_unknown_option(const struct cmd_struct *cmd, char **argv);
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__attribute__((noreturn))
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void usage(const struct cmd_struct *cmd, int error);
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void usage_command(const struct cmd_struct *cmd, bool full, bool err);
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void usage_command_group(const struct cmd_group *grp, bool all, bool err);
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void usage_command_group_short(const struct cmd_group *grp);
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__attribute__((noreturn))
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void help_unknown_token(const char *arg, const struct cmd_group *grp);
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__attribute__((noreturn))
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void help_ambiguous_token(const char *arg, const struct cmd_group *grp);
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void help_command_group(const struct cmd_group *grp, int argc, char **argv);
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int check_argc_exact(int nargs, int expected);
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int check_argc_min(int nargs, int expected);
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int check_argc_max(int nargs, int expected);
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void clean_args_no_options(const struct cmd_struct *cmd,
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int argc, char *argv[]);
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void clean_args_no_options_relaxed(const struct cmd_struct *cmd,
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int argc, char *argv[]);
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void fixup_argv0(char **argv, const char *token);
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void set_argv0(char **argv);
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const char *get_argv0_buf(void);
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#endif
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