mirror of
https://gitlab.com/libvirt/libvirt.git
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b9d8cadeaa
Change the logic in a way, so that VSH_CMD_FLAG_ALIAS behaves similarly to how VSH_OT_ALIAS for command options, i.e. there is no need for code duplication for the alias and the aliased command structures. Along with that change, switch any existing VSH_CMD_FLAG_ALIAS occurrences to this new format. Also, since this patch introduces a new command structure element, adjust the virsh-self-test test to make sure we won't ever miss to specify the '.alias' member for an aliased command because doing that would lead to an internal error. Signed-off-by: Erik Skultety <eskultet@redhat.com>
576 lines
22 KiB
C
576 lines
22 KiB
C
/*
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* vsh.h: common data to be used by clients to exercise the libvirt API
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*
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* Copyright (C) 2005, 2007-2015 Red Hat, Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library 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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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library. If not, see
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* <http://www.gnu.org/licenses/>.
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*
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* Daniel Veillard <veillard@redhat.com>
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* Karel Zak <kzak@redhat.com>
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* Daniel P. Berrange <berrange@redhat.com>
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*/
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#ifndef VSH_H
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# define VSH_H
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# include <stdio.h>
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# include <stdlib.h>
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# include <string.h>
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# include <stdarg.h>
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# include <unistd.h>
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# include <sys/stat.h>
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# include <termios.h>
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# include "internal.h"
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# include "virerror.h"
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# include "virthread.h"
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# define VIR_FROM_THIS VIR_FROM_NONE
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# define GETTIMEOFDAY(T) gettimeofday(T, NULL)
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# define VSH_MAX_XML_FILE (10*1024*1024)
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# define VSH_MATCH(FLAG) (flags & (FLAG))
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/**
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* The log configuration
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*/
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# define MSG_BUFFER 4096
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# define DIR_MODE (S_IWUSR | S_IRUSR | S_IXUSR | S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH) /* 0755 */
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# define FILE_MODE (S_IWUSR | S_IRUSR | S_IRGRP | S_IROTH) /* 0644 */
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# define LOCK_MODE (S_IWUSR | S_IRUSR) /* 0600 */
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# define LVL_DEBUG "DEBUG"
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# define LVL_INFO "INFO"
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# define LVL_NOTICE "NOTICE"
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# define LVL_WARNING "WARNING"
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# define LVL_ERROR "ERROR"
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/**
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* vshErrorLevel:
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*
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* Indicates the level of a log message
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*/
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typedef enum {
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VSH_ERR_DEBUG = 0,
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VSH_ERR_INFO,
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VSH_ERR_NOTICE,
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VSH_ERR_WARNING,
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VSH_ERR_ERROR
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} vshErrorLevel;
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# define VSH_DEBUG_DEFAULT VSH_ERR_ERROR
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/*
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* virsh command line grammar:
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*
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* command_line = <command>\n | <command>; <command>; ...
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*
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* command = <keyword> <option> [--] <data>
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*
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* option = <bool_option> | <int_option> | <string_option>
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* data = <string>
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*
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* bool_option = --optionname
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* int_option = --optionname <number> | --optionname=<number>
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* string_option = --optionname <string> | --optionname=<string>
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*
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* keyword = [a-zA-Z][a-zA-Z-]*
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* number = [0-9]+
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* string = ('[^']*'|"([^\\"]|\\.)*"|([^ \t\n\\'"]|\\.))+
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*
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*/
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/*
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* vshCmdOptType - command option type
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*/
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typedef enum {
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VSH_OT_BOOL, /* optional boolean option */
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VSH_OT_STRING, /* optional string option */
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VSH_OT_INT, /* optional or mandatory int option */
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VSH_OT_DATA, /* string data (as non-option) */
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VSH_OT_ARGV, /* remaining arguments */
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VSH_OT_ALIAS, /* alternate spelling for a later argument */
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} vshCmdOptType;
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/*
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* Command Option Flags
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*/
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enum {
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VSH_OFLAG_NONE = 0, /* without flags */
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VSH_OFLAG_REQ = (1 << 0), /* option required */
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VSH_OFLAG_EMPTY_OK = (1 << 1), /* empty string option allowed */
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VSH_OFLAG_REQ_OPT = (1 << 2), /* --optionname required */
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};
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/* forward declarations */
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typedef struct _vshClientHooks vshClientHooks;
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typedef struct _vshCmd vshCmd;
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typedef struct _vshCmdDef vshCmdDef;
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typedef struct _vshCmdGrp vshCmdGrp;
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typedef struct _vshCmdInfo vshCmdInfo;
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typedef struct _vshCmdOpt vshCmdOpt;
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typedef struct _vshCmdOptDef vshCmdOptDef;
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typedef struct _vshControl vshControl;
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typedef char **(*vshCompleter)(void *opaque, unsigned int flags);
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/*
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* vshCmdInfo -- name/value pair for information about command
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*
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* Commands should have at least the following names:
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* "help" - short description of command
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* "desc" - description of command, or empty string
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*/
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struct _vshCmdInfo {
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const char *name; /* name of information, or NULL for list end */
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const char *data; /* non-NULL information */
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};
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/*
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* vshCmdOptDef - command option definition
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*/
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struct _vshCmdOptDef {
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const char *name; /* the name of option, or NULL for list end */
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vshCmdOptType type; /* option type */
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unsigned int flags; /* flags */
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const char *help; /* non-NULL help string; or for VSH_OT_ALIAS
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* the name of a later public option */
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vshCompleter completer; /* option completer */
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unsigned int completer_flags; /* option completer flags */
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};
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/*
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* vshCmdOpt - command options
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*
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* After parsing a command, all arguments to the command have been
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* collected into a list of these objects.
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*/
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struct _vshCmdOpt {
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const vshCmdOptDef *def; /* non-NULL pointer to option definition */
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char *data; /* allocated data, or NULL for bool option */
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vshCmdOpt *next;
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};
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/*
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* Command Usage Flags
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*/
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enum {
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VSH_CMD_FLAG_NOCONNECT = (1 << 0), /* no prior connection needed */
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VSH_CMD_FLAG_ALIAS = (1 << 1), /* command is an alias */
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};
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/*
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* vshCmdDef - command definition
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*/
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struct _vshCmdDef {
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const char *name; /* name of command, or NULL for list end */
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bool (*handler) (vshControl *, const vshCmd *); /* command handler */
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const vshCmdOptDef *opts; /* definition of command options */
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const vshCmdInfo *info; /* details about command */
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unsigned int flags; /* bitwise OR of VSH_CMD_FLAG */
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const char *alias; /* name of the aliased command */
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};
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/*
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* vshCmd - parsed command
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*/
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struct _vshCmd {
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const vshCmdDef *def; /* command definition */
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vshCmdOpt *opts; /* list of command arguments */
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vshCmd *next; /* next command */
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};
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/*
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* vshControl
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*/
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struct _vshControl {
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const char *name; /* hardcoded name of the binary that cannot
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* be changed without recompilation compared
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* to program name */
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const char *env_prefix; /* hardcoded environment variable prefix */
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char *connname; /* connection name */
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char *progname; /* program name */
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vshCmd *cmd; /* the current command */
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char *cmdstr; /* string with command */
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bool imode; /* interactive mode? */
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bool quiet; /* quiet mode */
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bool timing; /* print timing info? */
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int debug; /* print debug messages? */
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char *logfile; /* log file name */
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int log_fd; /* log file descriptor */
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char *historydir; /* readline history directory name */
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char *historyfile; /* readline history file name */
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virThread eventLoop;
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virMutex lock;
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bool eventLoopStarted;
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bool quit;
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int eventPipe[2]; /* Write-to-self pipe to end waiting for an
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* event to occur */
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int eventTimerId; /* id of event loop timeout registration */
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int keepalive_interval; /* Client keepalive interval */
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int keepalive_count; /* Client keepalive count */
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# ifndef WIN32
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struct termios termattr; /* settings of the tty terminal */
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# endif
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bool istty; /* is the terminal a tty */
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const vshClientHooks *hooks;/* mandatory client specific hooks */
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void *privData; /* client specific data */
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};
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typedef void *
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(*vshConnectionHook)(vshControl *ctl);
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struct _vshClientHooks {
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vshConnectionHook connHandler;
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};
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struct _vshCmdGrp {
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const char *name; /* name of group, or NULL for list end */
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const char *keyword; /* help keyword */
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const vshCmdDef *commands;
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};
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void vshError(vshControl *ctl, const char *format, ...)
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ATTRIBUTE_FMT_PRINTF(2, 3);
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void vshOpenLogFile(vshControl *ctl);
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void vshOutputLogFile(vshControl *ctl, int log_level, const char *format,
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va_list ap)
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ATTRIBUTE_FMT_PRINTF(3, 0);
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void vshCloseLogFile(vshControl *ctl);
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const char *vshCmddefGetInfo(const vshCmdDef *cmd, const char *info);
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const vshCmdDef *vshCmddefSearch(const char *cmdname);
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bool vshCmddefHelp(vshControl *ctl, const char *name);
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const vshCmdGrp *vshCmdGrpSearch(const char *grpname);
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bool vshCmdGrpHelp(vshControl *ctl, const char *name);
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int vshCommandOptInt(vshControl *ctl, const vshCmd *cmd,
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const char *name, int *value)
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ATTRIBUTE_NONNULL(4) ATTRIBUTE_RETURN_CHECK;
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int vshCommandOptUInt(vshControl *ctl, const vshCmd *cmd,
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const char *name, unsigned int *value)
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ATTRIBUTE_NONNULL(4) ATTRIBUTE_RETURN_CHECK;
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int vshCommandOptUIntWrap(vshControl *ctl, const vshCmd *cmd,
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const char *name, unsigned int *value)
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ATTRIBUTE_NONNULL(4) ATTRIBUTE_RETURN_CHECK;
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int vshCommandOptUL(vshControl *ctl, const vshCmd *cmd,
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const char *name, unsigned long *value)
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ATTRIBUTE_NONNULL(4) ATTRIBUTE_RETURN_CHECK;
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int vshCommandOptULWrap(vshControl *ctl, const vshCmd *cmd,
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const char *name, unsigned long *value)
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ATTRIBUTE_NONNULL(4) ATTRIBUTE_RETURN_CHECK;
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int vshCommandOptStringQuiet(vshControl *ctl, const vshCmd *cmd,
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const char *name, const char **value)
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ATTRIBUTE_NONNULL(4) ATTRIBUTE_RETURN_CHECK;
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int vshCommandOptStringReq(vshControl *ctl, const vshCmd *cmd,
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const char *name, const char **value)
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ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(2) ATTRIBUTE_NONNULL(3)
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ATTRIBUTE_NONNULL(4) ATTRIBUTE_RETURN_CHECK;
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int vshCommandOptLongLong(vshControl *ctl, const vshCmd *cmd,
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const char *name, long long *value)
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ATTRIBUTE_NONNULL(4) ATTRIBUTE_RETURN_CHECK;
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int vshCommandOptULongLong(vshControl *ctl, const vshCmd *cmd,
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const char *name, unsigned long long *value)
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ATTRIBUTE_NONNULL(4) ATTRIBUTE_RETURN_CHECK;
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int vshCommandOptULongLongWrap(vshControl *ctl, const vshCmd *cmd,
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const char *name, unsigned long long *value)
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ATTRIBUTE_NONNULL(4) ATTRIBUTE_RETURN_CHECK;
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int vshCommandOptScaledInt(vshControl *ctl, const vshCmd *cmd,
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const char *name, unsigned long long *value,
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int scale, unsigned long long max)
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ATTRIBUTE_NONNULL(4) ATTRIBUTE_RETURN_CHECK;
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int vshBlockJobOptionBandwidth(vshControl *ctl,
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const vshCmd *cmd,
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bool bytes,
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unsigned long *bandwidth);
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bool vshCommandOptBool(const vshCmd *cmd, const char *name);
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bool vshCommandRun(vshControl *ctl, const vshCmd *cmd);
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bool vshCommandStringParse(vshControl *ctl, char *cmdstr);
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const vshCmdOpt *vshCommandOptArgv(vshControl *ctl, const vshCmd *cmd,
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const vshCmdOpt *opt);
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bool vshCommandArgvParse(vshControl *ctl, int nargs, char **argv);
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int vshCommandOptTimeoutToMs(vshControl *ctl, const vshCmd *cmd, int *timeout);
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void vshPrint(vshControl *ctl, const char *format, ...)
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ATTRIBUTE_FMT_PRINTF(2, 3);
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void vshPrintExtra(vshControl *ctl, const char *format, ...)
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ATTRIBUTE_FMT_PRINTF(2, 3);
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bool vshInit(vshControl *ctl, const vshCmdGrp *groups, const vshCmdDef *set);
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bool vshInitReload(vshControl *ctl);
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void vshDeinit(vshControl *ctl);
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void vshDebug(vshControl *ctl, int level, const char *format, ...)
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ATTRIBUTE_FMT_PRINTF(3, 4);
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/* User visible sort, so we want locale-specific case comparison. */
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# define vshStrcasecmp(S1, S2) strcasecmp(S1, S2)
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int vshNameSorter(const void *a, const void *b);
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virTypedParameterPtr vshFindTypedParamByName(const char *name,
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virTypedParameterPtr list,
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int count);
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char *vshGetTypedParamValue(vshControl *ctl, virTypedParameterPtr item)
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ATTRIBUTE_NONNULL(1) ATTRIBUTE_NONNULL(2);
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double vshPrettyCapacity(unsigned long long val, const char **unit);
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int vshStringToArray(const char *str, char ***array);
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/* Given an index, return either the name of that device (non-NULL) or
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* of its parent (NULL if a root). */
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typedef const char * (*vshTreeLookup)(int devid, bool parent, void *opaque);
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int vshTreePrint(vshControl *ctl, vshTreeLookup lookup, void *opaque,
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int num_devices, int devid);
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/* error handling */
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extern virErrorPtr last_error;
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void vshErrorHandler(void *opaque, virErrorPtr error);
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void vshReportError(vshControl *ctl);
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void vshResetLibvirtError(void);
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void vshSaveLibvirtError(void);
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/* file handling */
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char *vshEditWriteToTempFile(vshControl *ctl, const char *doc);
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int vshEditFile(vshControl *ctl, const char *filename);
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char *vshEditReadBackFile(vshControl *ctl, const char *filename);
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int vshAskReedit(vshControl *ctl, const char *msg, bool relax_avail);
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/* terminal modifications */
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bool vshTTYIsInterruptCharacter(vshControl *ctl, const char chr);
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int vshTTYDisableInterrupt(vshControl *ctl);
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int vshTTYRestore(vshControl *ctl);
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int vshTTYMakeRaw(vshControl *ctl, bool report_errors);
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bool vshTTYAvailable(vshControl *ctl);
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/* waiting for events */
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enum {
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VSH_EVENT_INTERRUPT,
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VSH_EVENT_TIMEOUT,
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VSH_EVENT_DONE,
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};
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void vshEventCleanup(vshControl *ctl);
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void vshEventDone(vshControl *ctl);
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void vshEventLoop(void *opaque);
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int vshEventStart(vshControl *ctl, int timeout_ms);
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void vshEventTimeout(int timer, void *opaque);
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int vshEventWait(vshControl *ctl);
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/* generic commands */
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extern const vshCmdOptDef opts_help[];
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extern const vshCmdInfo info_help[];
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extern const vshCmdOptDef opts_cd[];
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extern const vshCmdInfo info_cd[];
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extern const vshCmdOptDef opts_echo[];
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extern const vshCmdInfo info_echo[];
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extern const vshCmdInfo info_pwd[];
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extern const vshCmdInfo info_quit[];
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extern const vshCmdInfo info_selftest[];
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bool cmdHelp(vshControl *ctl, const vshCmd *cmd);
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bool cmdCd(vshControl *ctl, const vshCmd *cmd);
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bool cmdEcho(vshControl *ctl, const vshCmd *cmd);
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bool cmdPwd(vshControl *ctl, const vshCmd *cmd);
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bool cmdQuit(vshControl *ctl, const vshCmd *cmd);
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bool cmdSelfTest(vshControl *ctl, const vshCmd *cmd);
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# define VSH_CMD_CD \
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{ \
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.name = "cd", \
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.handler = cmdCd, \
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.opts = opts_cd, \
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.info = info_cd, \
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.flags = VSH_CMD_FLAG_NOCONNECT \
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}
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# define VSH_CMD_ECHO \
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{ \
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.name = "echo", \
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.handler = cmdEcho, \
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.opts = opts_echo, \
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.info = info_echo, \
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.flags = VSH_CMD_FLAG_NOCONNECT \
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}
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# define VSH_CMD_EXIT \
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{ \
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.name = "exit", \
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.handler = cmdQuit, \
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.opts = NULL, \
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.info = info_quit, \
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.flags = VSH_CMD_FLAG_NOCONNECT \
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}
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# define VSH_CMD_HELP \
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{ \
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.name = "help", \
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.handler = cmdHelp, \
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.opts = opts_help, \
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.info = info_help, \
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.flags = VSH_CMD_FLAG_NOCONNECT \
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}
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# define VSH_CMD_PWD \
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{ \
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.name = "pwd", \
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.handler = cmdPwd, \
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.opts = NULL, \
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.info = info_pwd, \
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.flags = VSH_CMD_FLAG_NOCONNECT \
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}
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# define VSH_CMD_QUIT \
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{ \
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.name = "quit", \
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.handler = cmdQuit, \
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.opts = NULL, \
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.info = info_quit, \
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.flags = VSH_CMD_FLAG_NOCONNECT \
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}
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# define VSH_CMD_SELF_TEST \
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{ \
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.name = "self-test", \
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.handler = cmdSelfTest, \
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.opts = NULL, \
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.info = info_selftest, \
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.flags = VSH_CMD_FLAG_NOCONNECT | VSH_CMD_FLAG_ALIAS, \
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.alias = "self-test" \
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}
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/* readline */
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char * vshReadline(vshControl *ctl, const char *prompt);
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/* allocation wrappers */
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void *_vshMalloc(vshControl *ctl, size_t sz, const char *filename, int line);
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# define vshMalloc(_ctl, _sz) _vshMalloc(_ctl, _sz, __FILE__, __LINE__)
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void *_vshCalloc(vshControl *ctl, size_t nmemb, size_t sz,
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const char *filename, int line);
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# define vshCalloc(_ctl, _nmemb, _sz) \
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_vshCalloc(_ctl, _nmemb, _sz, __FILE__, __LINE__)
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char *_vshStrdup(vshControl *ctl, const char *s, const char *filename,
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int line);
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# define vshStrdup(_ctl, _s) _vshStrdup(_ctl, _s, __FILE__, __LINE__)
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/* Macros to help dealing with mutually exclusive options. */
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/* VSH_EXCLUSIVE_OPTIONS_EXPR:
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*
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* @NAME1: String containing the name of the option.
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* @EXPR1: Expression to validate the variable (boolean variable)
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* @NAME2: String containing the name of the option.
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* @EXPR2: Expression to validate the variable (boolean variable)
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*
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* Reject mutually exclusive command options in virsh. Use the
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* provided expression to check the variables.
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*
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* This helper does an early return and therefore it has to be called
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* before anything that would require cleanup.
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*/
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# define VSH_EXCLUSIVE_OPTIONS_EXPR(NAME1, EXPR1, NAME2, EXPR2) \
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if ((EXPR1) && (EXPR2)) { \
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vshError(ctl, _("Options --%s and --%s are mutually exclusive"), \
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NAME1, NAME2); \
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return false; \
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}
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/* VSH_EXCLUSIVE_OPTIONS:
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*
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* @NAME1: String containing the name of the option.
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* @NAME2: String containing the name of the option.
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*
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* Reject mutually exclusive command options in virsh. Use the
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* vshCommandOptBool call to request them.
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*
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* This helper does an early return and therefore it has to be called
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* before anything that would require cleanup.
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*/
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# define VSH_EXCLUSIVE_OPTIONS(NAME1, NAME2) \
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VSH_EXCLUSIVE_OPTIONS_EXPR(NAME1, vshCommandOptBool(cmd, NAME1), \
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NAME2, vshCommandOptBool(cmd, NAME2))
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/* VSH_EXCLUSIVE_OPTIONS_VAR:
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*
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* @VARNAME1: Boolean variable containing the value of the option of same name
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* @VARNAME2: Boolean variable containing the value of the option of same name
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*
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* Reject mutually exclusive command options in virsh. Check in variables that
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* contain the value and have same name as the option.
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*
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* This helper does an early return and therefore it has to be called
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* before anything that would require cleanup.
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*/
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# define VSH_EXCLUSIVE_OPTIONS_VAR(VARNAME1, VARNAME2) \
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VSH_EXCLUSIVE_OPTIONS_EXPR(#VARNAME1, VARNAME1, #VARNAME2, VARNAME2)
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/* Macros to help dealing with required options. */
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/* VSH_REQUIRE_OPTION_EXPR:
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*
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* @NAME1: String containing the name of the option.
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* @EXPR1: Expression to validate the variable (boolean variable).
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* @NAME2: String containing the name of required option.
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* @EXPR2: Expression to validate the variable (boolean variable).
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*
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* Check if required command options in virsh was set. Use the
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* provided expression to check the variables.
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*
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* This helper does an early return and therefore it has to be called
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* before anything that would require cleanup.
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*/
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# define VSH_REQUIRE_OPTION_EXPR(NAME1, EXPR1, NAME2, EXPR2) \
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do { \
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if ((EXPR1) && !(EXPR2)) { \
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vshError(ctl, _("Option --%s is required by option --%s"), \
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NAME2, NAME1); \
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return false; \
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} \
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} while (0)
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/* VSH_REQUIRE_OPTION:
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*
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* @NAME1: String containing the name of the option.
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* @NAME2: String containing the name of required option.
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*
|
|
* Check if required command options in virsh was set. Use the
|
|
* vshCommandOptBool call to request them.
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*
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|
* This helper does an early return and therefore it has to be called
|
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* before anything that would require cleanup.
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*/
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# define VSH_REQUIRE_OPTION(NAME1, NAME2) \
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VSH_REQUIRE_OPTION_EXPR(NAME1, vshCommandOptBool(cmd, NAME1), \
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NAME2, vshCommandOptBool(cmd, NAME2))
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/* VSH_REQUIRE_OPTION_VAR:
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|
*
|
|
* @VARNAME1: Boolean variable containing the value of the option of same name.
|
|
* @VARNAME2: Boolean variable containing the value of required option of
|
|
* same name.
|
|
*
|
|
* Check if required command options in virsh was set. Check in variables
|
|
* that contain the value and have same name as the option.
|
|
*
|
|
* This helper does an early return and therefore it has to be called
|
|
* before anything that would require cleanup.
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*/
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# define VSH_REQUIRE_OPTION_VAR(VARNAME1, VARNAME2) \
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VSH_REQUIRE_OPTION_EXPR(#VARNAME1, VARNAME1, #VARNAME2, VARNAME2)
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#endif /* VSH_H */
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