/** @file * IPRT - Command Line Parsing. */ /* * Copyright (C) 2007-2022 Oracle and/or its affiliates. * * This file is part of VirtualBox base platform packages, as * available from https://www.virtualbox.org. * * This program is free software; you can redistribute it and/or * modify it under the terms of the GNU General Public License * as published by the Free Software Foundation, in version 3 of the * License. * * This program is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, see . * * The contents of this file may alternatively be used under the terms * of the Common Development and Distribution License Version 1.0 * (CDDL), a copy of it is provided in the "COPYING.CDDL" file included * in the VirtualBox distribution, in which case the provisions of the * CDDL are applicable instead of those of the GPL. * * You may elect to license modified versions of this file under the * terms and conditions of either the GPL or the CDDL or both. * * SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0 */ #ifndef IPRT_INCLUDED_getopt_h #define IPRT_INCLUDED_getopt_h #ifndef RT_WITHOUT_PRAGMA_ONCE # pragma once #endif #include #include #include /* for VINF_GETOPT_NOT_OPTION */ RT_C_DECLS_BEGIN /** @defgroup grp_rt_getopt RTGetOpt - Command Line Parsing * @ingroup grp_rt * @{ */ /** @name Values for RTGETOPTDEF::fFlags and the fFlags parameter of * RTGetOptFetchValue. * * @remarks When neither of the RTGETOPT_FLAG_HEX, RTGETOPT_FLAG_OCT and RTGETOPT_FLAG_DEC * flags are specified with a integer value format, RTGetOpt will default to * decimal but recognize the 0x prefix when present. RTGetOpt will not look for * for the octal prefix (0). * @{ */ /** Requires no extra argument. * (Can be assumed to be 0 for ever.) */ #define RTGETOPT_REQ_NOTHING 0 /** A value is required or error will be returned. */ #define RTGETOPT_REQ_STRING 1 /** The value must be a valid signed 8-bit integer or an error will be returned. */ #define RTGETOPT_REQ_INT8 2 /** The value must be a valid unsigned 8-bit integer or an error will be returned. */ #define RTGETOPT_REQ_UINT8 3 /** The value must be a valid signed 16-bit integer or an error will be returned. */ #define RTGETOPT_REQ_INT16 4 /** The value must be a valid unsigned 16-bit integer or an error will be returned. */ #define RTGETOPT_REQ_UINT16 5 /** The value must be a valid signed 32-bit integer or an error will be returned. */ #define RTGETOPT_REQ_INT32 6 /** The value must be a valid unsigned 32-bit integer or an error will be returned. */ #define RTGETOPT_REQ_UINT32 7 /** The value must be a valid signed 64-bit integer or an error will be returned. */ #define RTGETOPT_REQ_INT64 8 /** The value must be a valid unsigned 64-bit integer or an error will be returned. */ #define RTGETOPT_REQ_UINT64 9 /** The value must be a valid IPv4 address. * (Not a name, but 4 values in the 0..255 range with dots separating them). */ #define RTGETOPT_REQ_IPV4ADDR 10 /** The value must be a valid IPv4 CIDR. * As with RTGETOPT_REQ_IPV4ADDR, no name. */ #define RTGETOPT_REQ_IPV4CIDR 11 #if 0 /* take placers */ /** The value must be a valid IPv6 addr * @todo: Add types and parsing routines in (iprt/net.h) */ #define RTGETOPT_REQ_IPV6ADDR 12 /** The value must be a valid IPv6 CIDR * @todo: Add types and parsing routines in (iprt/net.h) */ #define RTGETOPT_REQ_IPV6CIDR 13 #endif /** The value must be a valid ethernet MAC address. */ #define RTGETOPT_REQ_MACADDR 14 /** The value must be a valid UUID. */ #define RTGETOPT_REQ_UUID 15 /** The value must be a string with value as "on" or "off". */ #define RTGETOPT_REQ_BOOL_ONOFF 16 /** Boolean option accepting a wide range of typical ways of * expression true and false. */ #define RTGETOPT_REQ_BOOL 17 /** The value must two unsigned 32-bit integer values separated by a colon, * slash, pipe or space(s). */ #define RTGETOPT_REQ_UINT32_PAIR 18 /** The value must two unsigned 64-bit integer values separated by a colon, * slash, pipe or space(s). */ #define RTGETOPT_REQ_UINT64_PAIR 19 /** The value must at least unsigned 32-bit integer value, optionally * followed by a second separated by a colon, slash, pipe or space(s). */ #define RTGETOPT_REQ_UINT32_OPTIONAL_PAIR 20 /** The value must at least unsigned 64-bit integer value, optionally * followed by a second separated by a colon, slash, pipe or space(s). */ #define RTGETOPT_REQ_UINT64_OPTIONAL_PAIR 21 /** The mask of the valid required types. */ #define RTGETOPT_REQ_MASK 31 /** Treat the value as hexadecimal - only applicable with the RTGETOPT_REQ_*INT*. */ #define RTGETOPT_FLAG_HEX RT_BIT(16) /** Treat the value as octal - only applicable with the RTGETOPT_REQ_*INT*. */ #define RTGETOPT_FLAG_OCT RT_BIT(17) /** Treat the value as decimal - only applicable with the RTGETOPT_REQ_*INT*. */ #define RTGETOPT_FLAG_DEC RT_BIT(18) /** The index value is attached to the argument - only valid for long arguments. */ #define RTGETOPT_FLAG_INDEX RT_BIT(19) /** Used with RTGETOPT_FLAG_INDEX, setting index to zero if none given. * (The default is to fail with VERR_GETOPT_INDEX_MISSING.) */ #define RTGETOPT_FLAG_INDEX_DEF_0 RT_BIT(20) /** Used with RTGETOPT_FLAG_INDEX, setting index to one if none given. * (The default is to fail with VERR_GETOPT_INDEX_MISSING.) */ #define RTGETOPT_FLAG_INDEX_DEF_1 RT_BIT(21) /** For simplicity. */ #define RTGETOPT_FLAG_INDEX_DEF_MASK (RT_BIT(20) | RT_BIT(21)) /** For simple conversion. */ #define RTGETOPT_FLAG_INDEX_DEF_SHIFT 20 /** For use with RTGETOPT_FLAG_INDEX_DEF_0 or RTGETOPT_FLAG_INDEX_DEF_1 to * imply a dash before the index when a digit is specified. * This is for transitioning from options without index to optionally allow * index options, i.e. "--long" defaults to either index 1 or 1 using the above * flags, while "--long-1" explicitly gives the index ("--long-" is not valid). * This flag matches an "-" separating the "--long" string * (RTGETOPTDEFS::pszLong) from the index value. */ #define RTGETOPT_FLAG_INDEX_DEF_DASH RT_BIT(22) /** Treat the long option as case insensitive. */ #define RTGETOPT_FLAG_ICASE RT_BIT(23) /** Mask of valid bits - for validation. */ #define RTGETOPT_VALID_MASK ( RTGETOPT_REQ_MASK \ | RTGETOPT_FLAG_HEX \ | RTGETOPT_FLAG_OCT \ | RTGETOPT_FLAG_DEC \ | RTGETOPT_FLAG_INDEX \ | RTGETOPT_FLAG_INDEX_DEF_0 \ | RTGETOPT_FLAG_INDEX_DEF_1 \ | RTGETOPT_FLAG_INDEX_DEF_DASH \ | RTGETOPT_FLAG_ICASE ) /** @} */ /** * An option definition. */ typedef struct RTGETOPTDEF { /** The long option. * This is optional */ const char *pszLong; /** The short option character. * This doesn't have to be a character, it may also be a \#define or enum value if * there isn't any short version of this option. Must be greater than 0. */ int iShort; /** The flags (RTGETOPT_*). */ unsigned fFlags; } RTGETOPTDEF; /** Pointer to an option definition. */ typedef RTGETOPTDEF *PRTGETOPTDEF; /** Pointer to an const option definition. */ typedef const RTGETOPTDEF *PCRTGETOPTDEF; /** * Option argument union. * * What ends up here depends on argument format in the option definition. */ typedef union RTGETOPTUNION { /** Pointer to the definition on failure or when the option doesn't take an argument. * This can be NULL for some errors. */ PCRTGETOPTDEF pDef; /** A RTGETOPT_REQ_STRING option argument. */ const char *psz; /** A RTGETOPT_REQ_INT8 option argument. */ int8_t i8; /** A RTGETOPT_REQ_UINT8 option argument . */ uint8_t u8; /** A RTGETOPT_REQ_INT16 option argument. */ int16_t i16; /** A RTGETOPT_REQ_UINT16 option argument . */ uint16_t u16; /** A RTGETOPT_REQ_INT16 option argument. */ int32_t i32; /** A RTGETOPT_REQ_UINT32 option argument . */ uint32_t u32; /** A RTGETOPT_REQ_INT64 option argument. */ int64_t i64; /** A RTGETOPT_REQ_UINT64 option argument. */ uint64_t u64; #ifdef IPRT_INCLUDED_net_h /** A RTGETOPT_REQ_IPV4ADDR option argument. */ RTNETADDRIPV4 IPv4Addr; /** A RTGETOPT_REQ_IPV4CIDR option argument. */ struct { RTNETADDRIPV4 IPv4Network; RTNETADDRIPV4 IPv4Netmask; } CidrIPv4; #endif /** A RTGETOPT_REQ_MACADDR option argument. */ RTMAC MacAddr; /** A RTGETOPT_REQ_UUID option argument. */ RTUUID Uuid; /** A boolean flag. */ bool f; /** A RTGETOPT_REQ_UINT32_PAIR or RTGETOPT_REQ_UINT32_OPTIONAL_PAIR option * argument. */ struct { uint32_t uFirst; uint32_t uSecond; /**< Set to UINT32_MAX if optional and not present. */ } PairU32; /** A RTGETOPT_REQ_UINT64_COLON_PAIR option argument. */ struct { uint64_t uFirst; uint64_t uSecond; /**< Set to UINT64_MAX if optional and not present. */ } PairU64; } RTGETOPTUNION; /** Pointer to an option argument union. */ typedef RTGETOPTUNION *PRTGETOPTUNION; /** Pointer to a const option argument union. */ typedef RTGETOPTUNION const *PCRTGETOPTUNION; /** * RTGetOpt state. */ typedef struct RTGETOPTSTATE { /** The next argument. */ int iNext; /** Argument array. */ char **argv; /** Number of items in argv. */ int argc; /** Option definition array. */ PCRTGETOPTDEF paOptions; /** Number of items in paOptions. */ size_t cOptions; /** The next short option. * (For parsing ls -latrT4 kind of option lists.) */ const char *pszNextShort; /** The option definition which matched. NULL otherwise. */ PCRTGETOPTDEF pDef; /** The index of an index option, otherwise UINT32_MAX. */ uint32_t uIndex; /** The flags passed to RTGetOptInit. */ uint32_t fFlags; /** Number of non-options that we're skipping during a sorted get. The value * INT32_MAX is used to indicate that there are no more options. This is used * to implement '--'. */ int32_t cNonOptions; /* More members may be added later for dealing with new features. */ } RTGETOPTSTATE; /** Pointer to RTGetOpt state. */ typedef RTGETOPTSTATE *PRTGETOPTSTATE; /** * Initialize the RTGetOpt state. * * The passed in argument vector may be sorted if fFlags indicates that this is * desired (to be implemented). * * @returns VINF_SUCCESS, VERR_INVALID_PARAMETER or VERR_INVALID_POINTER. * @param pState The state. * * @param argc Argument count, to be copied from what comes in with * main(). * @param argv Argument array, to be copied from what comes in with * main(). This may end up being modified by the * option/argument sorting. * @param paOptions Array of RTGETOPTDEF structures, which must specify what * options are understood by the program. * @param cOptions Number of array items passed in with paOptions. * @param iFirst The argument to start with (in argv). * @param fFlags The flags, see RTGETOPTINIT_FLAGS_XXX. */ RTDECL(int) RTGetOptInit(PRTGETOPTSTATE pState, int argc, char **argv, PCRTGETOPTDEF paOptions, size_t cOptions, int iFirst, uint32_t fFlags); /** @name RTGetOptInit flags. * @{ */ /** Sort the arguments so that options comes first, then non-options. */ #define RTGETOPTINIT_FLAGS_OPTS_FIRST RT_BIT_32(0) /** Prevent add the standard version and help options: * - "--help", "-h" and "-?" returns 'h'. * - "--version" and "-V" return 'V'. */ #define RTGETOPTINIT_FLAGS_NO_STD_OPTS RT_BIT_32(1) /** @} */ /** * Command line argument parser, handling both long and short options and checking * argument formats, if desired. * * This is to be called in a loop until it returns 0 (meaning that all options * were parsed) or a negative value (meaning that an error occurred). How non-option * arguments are dealt with depends on the flags passed to RTGetOptInit. The default * (fFlags = 0) is to return VINF_GETOPT_NOT_OPTION with pValueUnion->psz pointing to * the argument string. * * For example, for a program which takes the following options: * * --optwithstring (or -s) and a string argument; * --optwithint (or -i) and a 32-bit signed integer argument; * --verbose (or -v) with no arguments, * * code would look something like this: * * @code int main(int argc, char **argv) { int rc = RTR3Init(); if (RT_FAILURE(rc)) return RTMsgInitFailure(rc); static const RTGETOPTDEF s_aOptions[] = { { "--optwithstring", 's', RTGETOPT_REQ_STRING }, { "--optwithint", 'i', RTGETOPT_REQ_INT32 }, { "--verbose", 'v', 0 }, }; int ch; RTGETOPTUNION ValueUnion; RTGETOPTSTATE GetState; RTGetOptInit(&GetState, argc, argv, s_aOptions, RT_ELEMENTS(s_aOptions), 1, 0); while ((ch = RTGetOpt(&GetState, &ValueUnion))) { // for options that require an argument, ValueUnion has received the value switch (ch) { case 's': // --optwithstring or -s // string argument, copy ValueUnion.psz break; case 'i': // --optwithint or -i // integer argument, copy ValueUnion.i32 break; case 'v': // --verbose or -v g_fOptVerbose = true; break; case VINF_GETOPT_NOT_OPTION: // handle non-option argument in ValueUnion.psz. break; default: return RTGetOptPrintError(ch, &ValueUnion); } } return RTEXITCODE_SUCCESS; } @endcode * * @returns 0 when done parsing. * @returns the iShort value of the option. pState->pDef points to the option * definition which matched. * @returns IPRT error status on parse error. * @returns VINF_GETOPT_NOT_OPTION when encountering a non-option argument and * RTGETOPTINIT_FLAGS_OPTS_FIRST was not specified. pValueUnion->psz * points to the argument string. * @returns VERR_GETOPT_UNKNOWN_OPTION when encountering an unknown option. * pValueUnion->psz points to the option string. * @returns VERR_GETOPT_REQUIRED_ARGUMENT_MISSING and pValueUnion->pDef if * a required argument (aka value) was missing for an option. * @returns VERR_GETOPT_INVALID_ARGUMENT_FORMAT and pValueUnion->pDef if * argument (aka value) conversion failed. * * @param pState The state previously initialized with RTGetOptInit. * @param pValueUnion Union with value; in the event of an error, psz member * points to erroneous parameter; otherwise, for options * that require an argument, this contains the value of * that argument, depending on the type that is required. */ RTDECL(int) RTGetOpt(PRTGETOPTSTATE pState, PRTGETOPTUNION pValueUnion); /** * Fetch a value. * * Used to retrive a value argument in a manner similar to what RTGetOpt does * (@a fFlags -> @a pValueUnion). This can be used when handling * VINF_GETOPT_NOT_OPTION, but is equally useful for decoding options that * takes more than one value. * * @returns VINF_SUCCESS on success. * @returns IPRT error status on parse error. * @returns VERR_INVALID_PARAMETER if the flags are wrong. * @returns VERR_GETOPT_UNKNOWN_OPTION when pState->pDef is null. * @returns VERR_GETOPT_REQUIRED_ARGUMENT_MISSING if there are no more * available arguments. pValueUnion->pDef is NULL. * @returns VERR_GETOPT_INVALID_ARGUMENT_FORMAT and pValueUnion->pDef is * unchanged if value conversion failed. * * @param pState The state previously initialized with RTGetOptInit. * @param pValueUnion Union with value; in the event of an error, psz member * points to erroneous parameter; otherwise, for options * that require an argument, this contains the value of * that argument, depending on the type that is required. * @param fFlags What to get, that is RTGETOPT_REQ_XXX. */ RTDECL(int) RTGetOptFetchValue(PRTGETOPTSTATE pState, PRTGETOPTUNION pValueUnion, uint32_t fFlags); /** * Gets the pointer to the argv entry of the current non-option argument. * * This function ASSUMES the previous RTGetOpt() call returned * VINF_GETOPT_NOT_OPTION and require RTGETOPTINIT_FLAGS_OPTS_FIRST to be * specified to RTGetOptInit(). * * @returns Pointer to the argv entry of the current non-option. NULL if * (detectable) precondition isn't fullfilled (asserted) * @param pState The state previously initialized with RTGetOptInit. */ RTDECL(char **) RTGetOptNonOptionArrayPtr(PRTGETOPTSTATE pState); /** * Print error messages for a RTGetOpt default case. * * Uses RTMsgError. * * @returns Suitable exit code. * * @param ch The RTGetOpt return value. * @param pValueUnion The value union returned by RTGetOpt. */ RTDECL(RTEXITCODE) RTGetOptPrintError(int ch, PCRTGETOPTUNION pValueUnion); /** * Formats error messages for a RTGetOpt default case. * * @returns On success, positive count of formatted character excluding the * terminator. On buffer overflow, negative number giving the required * buffer size (including terminator char). (RTStrPrintf2 style.) * * @param pszBuf The buffer to format into. * @param cbBuf The size of the buffer @a pszBuf points to. * @param ch The RTGetOpt return value. * @param pValueUnion The value union returned by RTGetOpt. */ RTDECL(ssize_t) RTGetOptFormatError(char *pszBuf, size_t cbBuf, int ch, PCRTGETOPTUNION pValueUnion); /** * Parses the @a pszCmdLine string into an argv array. * * This is useful for converting a response file or similar to an argument * vector that can be used with RTGetOptInit(). * * This function aims at following the bourne shell string quoting rules. * * @returns IPRT status code. * * @param ppapszArgv Where to return the argument vector. This must be * freed by calling RTGetOptArgvFreeEx or * RTGetOptArgvFree. * @param pcArgs Where to return the argument count. * @param pszCmdLine The string to parse. * @param fFlags A combination of the RTGETOPTARGV_CNV_XXX flags, * except RTGETOPTARGV_CNV_UNQUOTED is not supported. * @param pszSeparators String containing the argument separators. If NULL, * then space, tab, line feed (\\n) and return (\\r) * are used. */ RTDECL(int) RTGetOptArgvFromString(char ***ppapszArgv, int *pcArgs, const char *pszCmdLine, uint32_t fFlags, const char *pszSeparators); /** * Frees and argument vector returned by RTGetOptStringToArgv. * * @param papszArgv Argument vector. NULL is fine. */ RTDECL(void) RTGetOptArgvFree(char **papszArgv); /** * Frees and argument vector returned by RTGetOptStringToArgv, taking * RTGETOPTARGV_CNV_MODIFY_INPUT into account. * * @param papszArgv Argument vector. NULL is fine. * @param fFlags The flags passed to RTGetOptStringToArgv. */ RTDECL(void) RTGetOptArgvFreeEx(char **papszArgv, uint32_t fFlags); /** * Turns an argv array into a command line string. * * This is useful for calling CreateProcess on Windows, but can also be used for * displaying an argv array. * * This function aims at following the bourn shell string quoting rules. * * @returns IPRT status code. * * @param ppszCmdLine Where to return the command line string. This must * be freed by calling RTStrFree. * @param papszArgv The argument vector to convert. * @param fFlags A combination of the RTGETOPTARGV_CNV_XXX flags. */ RTDECL(int) RTGetOptArgvToString(char **ppszCmdLine, const char * const *papszArgv, uint32_t fFlags); /** @name RTGetOptArgvToString, RTGetOptArgvToUtf16String and * RTGetOptArgvFromString flags * @{ */ /** Quote strings according to the Microsoft CRT rules. */ #define RTGETOPTARGV_CNV_QUOTE_MS_CRT UINT32_C(0x00000000) /** Quote strings according to the Unix Bourne Shell. */ #define RTGETOPTARGV_CNV_QUOTE_BOURNE_SH UINT32_C(0x00000001) /** Don't quote any strings at all. */ #define RTGETOPTARGV_CNV_UNQUOTED UINT32_C(0x00000002) /** Mask for the quoting style. */ #define RTGETOPTARGV_CNV_QUOTE_MASK UINT32_C(0x00000003) /** Allow RTGetOptArgvFromString to modifying the command line input string. * @note Must use RTGetOptArgvFreeEx to free. */ #define RTGETOPTARGV_CNV_MODIFY_INPUT UINT32_C(0x00000004) /** Valid bits. */ #define RTGETOPTARGV_CNV_VALID_MASK UINT32_C(0x00000007) /** @} */ /** * Convenience wrapper around RTGetOpArgvToString and RTStrToUtf16. * * @returns IPRT status code. * * @param ppwszCmdLine Where to return the command line string. This must * be freed by calling RTUtf16Free. * @param papszArgv The argument vector to convert. * @param fFlags A combination of the RTGETOPTARGV_CNV_XXX flags. */ RTDECL(int) RTGetOptArgvToUtf16String(PRTUTF16 *ppwszCmdLine, const char * const *papszArgv, uint32_t fFlags); /** @} */ RT_C_DECLS_END #endif /* !IPRT_INCLUDED_getopt_h */