lib/popt/popt.h

   1 /** \file popt/popt.h
   2  * \ingroup popt
   3  */
   4
   5 /* (C) 1998-2000 Red Hat, Inc. -- Licensing details are in the COPYING
   6    file accompanying popt source distributions, available from
   7    ftp://ftp.rpm.org/pub/rpm/dist. */
   8
   9 #ifndef H_POPT
  10 #define H_POPT
  11
  12 #include <stdio.h>                      /* for FILE * */
  13
  14 #define POPT_OPTION_DEPTH       10
  15
  16 /** \ingroup popt
  17  * \name Arg type identifiers
  18  */
  19 /*@{*/
  20 #define POPT_ARG_NONE           0       /*!< no arg */
  21 #define POPT_ARG_STRING         1       /*!< arg will be saved as string */
  22 #define POPT_ARG_INT            2       /*!< arg will be converted to int */
  23 #define POPT_ARG_LONG           3       /*!< arg will be converted to long */
  24 #define POPT_ARG_INCLUDE_TABLE  4       /*!< arg points to table */
  25 #define POPT_ARG_CALLBACK       5       /*!< table-wide callback... must be
  26                                            set first in table; arg points
  27                                            to callback, descrip points to
  28                                            callback data to pass */
  29 #define POPT_ARG_INTL_DOMAIN    6       /*!< set the translation domain
  30                                            for this table and any
  31                                            included tables; arg points
  32                                            to the domain string */
  33 #define POPT_ARG_VAL            7       /*!< arg should take value val */
  34 #define POPT_ARG_FLOAT          8       /*!< arg will be converted to float */
  35 #define POPT_ARG_DOUBLE         9       /*!< arg will be converted to double */
  36
  37 #define POPT_ARG_MASK           0x0000FFFF
  38 /*@}*/
  39
  40 /** \ingroup popt
  41  * \name Arg modifiers
  42  */
  43 /*@{*/
  44 #define POPT_ARGFLAG_ONEDASH    0x80000000  /*!< allow -longoption */
  45 #define POPT_ARGFLAG_DOC_HIDDEN 0x40000000  /*!< don't show in help/usage */
  46 #define POPT_ARGFLAG_STRIP      0x20000000  /*!< strip this arg from argv(only applies to long args) */
  47 #define POPT_ARGFLAG_OPTIONAL   0x10000000  /*!< arg may be missing */
  48
  49 #define POPT_ARGFLAG_OR         0x08000000  /*!< arg will be or'ed */
  50 #define POPT_ARGFLAG_NOR        0x09000000  /*!< arg will be nor'ed */
  51 #define POPT_ARGFLAG_AND        0x04000000  /*!< arg will be and'ed */
  52 #define POPT_ARGFLAG_NAND       0x05000000  /*!< arg will be nand'ed */
  53 #define POPT_ARGFLAG_XOR        0x02000000  /*!< arg will be xor'ed */
  54 #define POPT_ARGFLAG_NOT        0x01000000  /*!< arg will be negated */
  55 #define POPT_ARGFLAG_LOGICALOPS \
  56         (POPT_ARGFLAG_OR|POPT_ARGFLAG_AND|POPT_ARGFLAG_XOR)
  57
  58 #define POPT_BIT_SET    (POPT_ARG_VAL|POPT_ARGFLAG_OR)
  59                                         /*!< set arg bit(s) */
  60 #define POPT_BIT_CLR    (POPT_ARG_VAL|POPT_ARGFLAG_NAND)
  61                                         /*!< clear arg bit(s) */
  62
  63 #define POPT_ARGFLAG_SHOW_DEFAULT 0x00800000 /*!< show default value in --help */
  64
  65 /*@}*/
  66
  67 /** \ingroup popt
  68  * \name Callback modifiers
  69  */
  70 /*@{*/
  71 #define POPT_CBFLAG_PRE         0x80000000  /*!< call the callback before parse */
  72 #define POPT_CBFLAG_POST        0x40000000  /*!< call the callback after parse */
  73 #define POPT_CBFLAG_INC_DATA    0x20000000  /*!< use data from the include line,
  74                                                not the subtable */
  75 #define POPT_CBFLAG_SKIPOPTION  0x10000000  /*!< don't callback with option */
  76 #define POPT_CBFLAG_CONTINUE    0x08000000  /*!< continue callbacks with option */
  77 /*@}*/
  78
  79 /** \ingroup popt
  80  * \name Error return values
  81  */
  82 /*@{*/
  83 #define POPT_ERROR_NOARG        -10     /*!< missing argument */
  84 #define POPT_ERROR_BADOPT       -11     /*!< unknown option */
  85 #define POPT_ERROR_OPTSTOODEEP  -13     /*!< aliases nested too deeply */
  86 #define POPT_ERROR_BADQUOTE     -15     /*!< error in parameter quoting */
  87 #define POPT_ERROR_ERRNO        -16     /*!< errno set, use strerror(errno) */
  88 #define POPT_ERROR_BADNUMBER    -17     /*!< invalid numeric value */
  89 #define POPT_ERROR_OVERFLOW     -18     /*!< number too large or too small */
  90 #define POPT_ERROR_BADOPERATION -19     /*!< mutually exclusive logical operations requested */
  91 #define POPT_ERROR_NULLARG      -20     /*!< opt->arg should not be NULL */
  92 #define POPT_ERROR_MALLOC       -21     /*!< memory allocation failed */
  93 /*@}*/
  94
  95 /** \ingroup popt
  96  * \name poptBadOption() flags
  97  */
  98 /*@{*/
  99 #define POPT_BADOPTION_NOALIAS  (1 << 0)  /*!< don't go into an alias */
 100 /*@}*/
 101
 102 /** \ingroup popt
 103  * \name poptGetContext() flags
 104  */
 105 /*@{*/
 106 #define POPT_CONTEXT_NO_EXEC    (1 << 0)  /*!< ignore exec expansions */
 107 #define POPT_CONTEXT_KEEP_FIRST (1 << 1)  /*!< pay attention to argv[0] */
 108 #define POPT_CONTEXT_POSIXMEHARDER (1 << 2) /*!< options can't follow args */
 109 #define POPT_CONTEXT_ARG_OPTS   (1 << 4) /*!< return args as options with value 0 */
 110 /*@}*/
 111
 112 /** \ingroup popt
 113  */
 114 struct poptOption {
 115 /*@observer@*/ /*@null@*/
 116     const char * longName;      /*!< may be NULL */
 117     char shortName;             /*!< may be '\0' */
 118     int argInfo;
 119 /*@shared@*/ /*@null@*/
 120     void * arg;                 /*!< depends on argInfo */
 121     int val;                    /*!< 0 means don't return, just update flag */
 122 /*@observer@*/ /*@null@*/
 123     const char * descrip;       /*!< description for autohelp -- may be NULL */
 124 /*@observer@*/ /*@null@*/
 125     const char * argDescrip;    /*!< argument description for autohelp */
 126 };
 127
 128 /** \ingroup popt
 129  * A popt alias argument for poptAddAlias().
 130  */
 131 struct poptAlias {
 132 /*@owned@*/ /*@null@*/
 133     const char * longName;      /*!< may be NULL */
 134     char shortName;             /*!< may be '\0' */
 135     int argc;
 136 /*@owned@*/
 137     const char ** argv;         /*!< must be free()able */
 138 };
 139
 140 /** \ingroup popt
 141  * A popt alias or exec argument for poptAddItem().
 142  */
 143 /*@-exporttype@*/
 144 typedef struct poptItem_s {
 145     struct poptOption option;   /*!< alias/exec name(s) and description. */
 146     int argc;                   /*!< (alias) no. of args. */
 147 /*@owned@*/
 148     const char ** argv;         /*!< (alias) args, must be free()able. */
 149 } * poptItem;
 150 /*@=exporttype@*/
 151
 152 /** \ingroup popt
 153  * \name Auto-generated help/usage
 154  */
 155 /*@{*/
 156
 157 /**
 158  * Empty table marker to enable displaying popt alias/exec options.
 159  */
 160 /*@-exportvar@*/
 161 /*@unchecked@*/ /*@observer@*/
 162 extern struct poptOption poptAliasOptions[];
 163 /*@=exportvar@*/
 164 #define POPT_AUTOALIAS { NULL, '\0', POPT_ARG_INCLUDE_TABLE, poptAliasOptions, \
 165                         0, "Options implemented via popt alias/exec:", NULL },
 166
 167 /**
 168  * Auto help table options.
 169  */
 170 /*@-exportvar@*/
 171 /*@unchecked@*/ /*@observer@*/
 172 extern struct poptOption poptHelpOptions[];
 173 /*@=exportvar@*/
 174 #define POPT_AUTOHELP { NULL, '\0', POPT_ARG_INCLUDE_TABLE, poptHelpOptions, \
 175                         0, "Help options:", NULL },
 176
 177 #define POPT_TABLEEND { NULL, '\0', 0, 0, 0, NULL, NULL }
 178 /*@}*/
 179
 180 /** \ingroup popt
 181  */
 182 /*@-exporttype@*/
 183 typedef /*@abstract@*/ struct poptContext_s * poptContext;
 184 /*@=exporttype@*/
 185
 186 /** \ingroup popt
 187  */
 188 #ifndef __cplusplus
 189 /*@-exporttype -typeuse@*/
 190 typedef struct poptOption * poptOption;
 191 /*@=exporttype =typeuse@*/
 192 #endif
 193
 194 /*@-exportconst@*/
 195 enum poptCallbackReason {
 196     POPT_CALLBACK_REASON_PRE    = 0,
 197     POPT_CALLBACK_REASON_POST   = 1,
 198     POPT_CALLBACK_REASON_OPTION = 2
 199 };
 200 /*@=exportconst@*/
 201
 202 #ifdef __cplusplus
 203 extern "C" {
 204 #endif
 205 /*@-type@*/
 206
 207 /** \ingroup popt
 208  * Table callback prototype.
 209  * @param con           context
 210  * @param reason        reason for callback
 211  * @param opt           option that triggered callback
 212  * @param arg           @todo Document.
 213  * @param data          @todo Document.
 214  */
 215 typedef void (*poptCallbackType) (poptContext con,
 216                 enum poptCallbackReason reason,
 217                 /*@null@*/ const struct poptOption * opt,
 218                 /*@null@*/ const char * arg,
 219                 /*@null@*/ const void * data)
 220         /*@*/;
 221
 222 /** \ingroup popt
 223  * Initialize popt context.
 224  * @param name          context name (usually argv[0] program name)
 225  * @param argc          no. of arguments
 226  * @param argv          argument array
 227  * @param options       address of popt option table
 228  * @param flags         or'd POPT_CONTEXT_* bits
 229  * @return              initialized popt context
 230  */
 231 /*@only@*/ /*@null@*/ poptContext poptGetContext(
 232                 /*@dependent@*/ /*@keep@*/ const char * name,
 233                 int argc, /*@dependent@*/ /*@keep@*/ const char ** argv,
 234                 /*@dependent@*/ /*@keep@*/ const struct poptOption * options,
 235                 int flags)
 236         /*@*/;
 237
 238 /** \ingroup popt
 239  * Reinitialize popt context.
 240  * @param con           context
 241  */
 242 /*@unused@*/
 243 void poptResetContext(/*@null@*/poptContext con)
 244         /*@modifies con @*/;
 245
 246 /** \ingroup popt
 247  * Return value of next option found.
 248  * @param con           context
 249  * @return              next option val, -1 on last item, POPT_ERROR_* on error
 250  */
 251 int poptGetNextOpt(/*@null@*/poptContext con)
 252         /*@globals fileSystem, internalState @*/
 253         /*@modifies con, fileSystem, internalState @*/;
 254
 255 /** \ingroup popt
 256  * Return next option argument (if any).
 257  * @param con           context
 258  * @return              option argument, NULL if no argument is available
 259  */
 260 /*@observer@*/ /*@null@*/ const char * poptGetOptArg(/*@null@*/poptContext con)
 261         /*@modifies con @*/;
 262
 263 /** \ingroup popt
 264  * Return next argument.
 265  * @param con           context
 266  * @return              next argument, NULL if no argument is available
 267  */
 268 /*@observer@*/ /*@null@*/ const char * poptGetArg(/*@null@*/poptContext con)
 269         /*@modifies con @*/;
 270
 271 /** \ingroup popt
 272  * Peek at current argument.
 273  * @param con           context
 274  * @return              current argument, NULL if no argument is available
 275  */
 276 /*@observer@*/ /*@null@*/ const char * poptPeekArg(/*@null@*/poptContext con)
 277         /*@*/;
 278
 279 /** \ingroup popt
 280  * Return remaining arguments.
 281  * @param con           context
 282  * @return              argument array, NULL terminated
 283  */
 284 /*@observer@*/ /*@null@*/ const char ** poptGetArgs(/*@null@*/poptContext con)
 285         /*@modifies con @*/;
 286
 287 /** \ingroup popt
 288  * Return the option which caused the most recent error.
 289  * @param con           context
 290  * @param flags
 291  * @return              offending option
 292  */
 293 /*@observer@*/ const char * poptBadOption(/*@null@*/poptContext con, int flags)
 294         /*@*/;
 295
 296 /** \ingroup popt
 297  * Destroy context.
 298  * @param con           context
 299  * @return              NULL always
 300  */
 301 /*@null@*/ poptContext poptFreeContext( /*@only@*/ /*@null@*/ poptContext con)
 302         /*@modifies con @*/;
 303
 304 /** \ingroup popt
 305  * Add arguments to context.
 306  * @param con           context
 307  * @param argv          argument array, NULL terminated
 308  * @return              0 on success, POPT_ERROR_OPTSTOODEEP on failure
 309  */
 310 int poptStuffArgs(poptContext con, /*@keep@*/ const char ** argv)
 311         /*@modifies con @*/;
 312
 313 /** \ingroup popt
 314  * Add alias to context.
 315  * @todo Pass alias by reference, not value.
 316  * @deprecated Use poptAddItem instead.
 317  * @param con           context
 318  * @param alias         alias to add
 319  * @param flags         (unused)
 320  * @return              0 on success
 321  */
 322 /*@unused@*/
 323 int poptAddAlias(poptContext con, struct poptAlias alias, int flags)
 324         /*@modifies con @*/;
 325
 326 /** \ingroup popt
 327  * Add alias/exec item to context.
 328  * @param con           context
 329  * @param newItem       alias/exec item to add
 330  * @param flags         0 for alias, 1 for exec
 331  * @return              0 on success
 332  */
 333 int poptAddItem(poptContext con, poptItem newItem, int flags)
 334         /*@modifies con @*/;
 335
 336 /** \ingroup popt
 337  * Read configuration file.
 338  * @param con           context
 339  * @param fn            file name to read
 340  * @return              0 on success, POPT_ERROR_ERRNO on failure
 341  */
 342 int poptReadConfigFile(poptContext con, const char * fn)
 343         /*@globals fileSystem, internalState @*/
 344         /*@modifies con->execs, con->numExecs,
 345                 fileSystem, internalState @*/;
 346
 347 /** \ingroup popt
 348  * Read default configuration from /etc/popt and $HOME/.popt.
 349  * @param con           context
 350  * @param useEnv        (unused)
 351  * @return              0 on success, POPT_ERROR_ERRNO on failure
 352  */
 353 int poptReadDefaultConfig(poptContext con, /*@unused@*/ int useEnv)
 354         /*@globals fileSystem, internalState @*/
 355         /*@modifies con->execs, con->numExecs,
 356                 fileSystem, internalState @*/;
 357
 358 /** \ingroup popt
 359  * Duplicate an argument array.
 360  * @note: The argument array is malloc'd as a single area, so only argv must
 361  * be free'd.
 362  *
 363  * @param argc          no. of arguments
 364  * @param argv          argument array
 365  * @retval argcPtr      address of returned no. of arguments
 366  * @retval argvPtr      address of returned argument array
 367  * @return              0 on success, POPT_ERROR_NOARG on failure
 368  */
 369 int poptDupArgv(int argc, /*@null@*/ const char **argv,
 370                 /*@null@*/ /*@out@*/ int * argcPtr,
 371                 /*@null@*/ /*@out@*/ const char *** argvPtr)
 372         /*@modifies *argcPtr, *argvPtr @*/;
 373
 374 /** \ingroup popt
 375  * Parse a string into an argument array.
 376  * The parse allows ', ", and \ quoting, but ' is treated the same as " and
 377  * both may include \ quotes.
 378  * @note: The argument array is malloc'd as a single area, so only argv must
 379  * be free'd.
 380  *
 381  * @param s             string to parse
 382  * @retval argcPtr      address of returned no. of arguments
 383  * @retval argvPtr      address of returned argument array
 384  */
 385 int poptParseArgvString(const char * s,
 386                 /*@out@*/ int * argcPtr, /*@out@*/ const char *** argvPtr)
 387         /*@modifies *argcPtr, *argvPtr @*/;
 388
 389 /** \ingroup popt
 390  * Parses an input configuration file and returns an string that is a
 391  * command line.  For use with popt.  You must free the return value when done.
 392  *
 393  * Given the file:
 394 \verbatim
 395 # this line is ignored
 396     #   this one too
 397 aaa
 398   bbb
 399     ccc
 400 bla=bla
 401
 402 this_is   =   fdsafdas
 403      bad_line=
 404   reall bad line
 405   reall bad line  = again
 406 5555=   55555
 407   test = with lots of spaces
 408 \endverbatim
 409 *
 410 * The result is:
 411 \verbatim
 412 --aaa --bbb --ccc --bla="bla" --this_is="fdsafdas" --5555="55555" --test="with lots of spaces"
 413 \endverbatim
 414 *
 415 * Passing this to poptParseArgvString() yields an argv of:
 416 \verbatim
 417 '--aaa'
 418 '--bbb'
 419 '--ccc'
 420 '--bla=bla'
 421 '--this_is=fdsafdas'
 422 '--5555=55555'
 423 '--test=with lots of spaces'
 424 \endverbatim
 425  *
 426  * @bug NULL is returned if file line is too long.
 427  * @bug Silently ignores invalid lines.
 428  *
 429  * @param fp            file handle to read
 430  * @param *argstrp      return string of options (malloc'd)
 431  * @param flags         unused
 432  * @return              0 on success
 433  * @see                 poptParseArgvString
 434  */
 435 /*@-fcnuse@*/
 436 int poptConfigFileToString(FILE *fp, /*@out@*/ char ** argstrp, int flags)
 437         /*@globals fileSystem @*/
 438         /*@modifies *fp, *argstrp, fileSystem @*/;
 439 /*@=fcnuse@*/
 440
 441 /** \ingroup popt
 442  * Return formatted error string for popt failure.
 443  * @param error         popt error
 444  * @return              error string
 445  */
 446 /*@observer@*/ const char* poptStrerror(const int error)
 447         /*@*/;
 448
 449 /** \ingroup popt
 450  * Limit search for executables.
 451  * @param con           context
 452  * @param path          single path to search for executables
 453  * @param allowAbsolute absolute paths only?
 454  */
 455 void poptSetExecPath(poptContext con, const char * path, int allowAbsolute)
 456         /*@modifies con @*/;
 457
 458 /** \ingroup popt
 459  * Print detailed description of options.
 460  * @param con           context
 461  * @param fp            output file handle
 462  * @param flags         (unused)
 463  */
 464 void poptPrintHelp(poptContext con, FILE * fp, /*@unused@*/ int flags)
 465         /*@globals fileSystem @*/
 466         /*@modifies *fp, fileSystem @*/;
 467
 468 /** \ingroup popt
 469  * Print terse description of options.
 470  * @param con           context
 471  * @param fp            output file handle
 472  * @param flags         (unused)
 473  */
 474 void poptPrintUsage(poptContext con, FILE * fp, /*@unused@*/ int flags)
 475         /*@globals fileSystem @*/
 476         /*@modifies *fp, fileSystem @*/;
 477
 478 /** \ingroup popt
 479  * Provide text to replace default "[OPTION...]" in help/usage output.
 480  * @param con           context
 481  * @param text          replacement text
 482  */
 483 /*@-fcnuse@*/
 484 void poptSetOtherOptionHelp(poptContext con, const char * text)
 485         /*@modifies con @*/;
 486 /*@=fcnuse@*/
 487
 488 /** \ingroup popt
 489  * Return argv[0] from context.
 490  * @param con           context
 491  * @return              argv[0]
 492  */
 493 /*@-fcnuse@*/
 494 /*@observer@*/ const char * poptGetInvocationName(poptContext con)
 495         /*@*/;
 496 /*@=fcnuse@*/
 497
 498 /** \ingroup popt
 499  * Shuffle argv pointers to remove stripped args, returns new argc.
 500  * @param con           context
 501  * @param argc          no. of args
 502  * @param argv          arg vector
 503  * @return              new argc
 504  */
 505 /*@-fcnuse@*/
 506 int poptStrippedArgv(poptContext con, int argc, char ** argv)
 507         /*@modifies *argv @*/;
 508 /*@=fcnuse@*/
 509
 510 /**
 511  * Save a long, performing logical operation with value.
 512  * @warning Alignment check may be too strict on certain platorms.
 513  * @param arg           integer pointer, aligned on int boundary.
 514  * @param argInfo       logical operation (see POPT_ARGFLAG_*)
 515  * @param aLong         value to use
 516  * @return              0 on success, POPT_ERROR_NULLARG/POPT_ERROR_BADOPERATION
 517  */
 518 /*@-incondefs@*/
 519 /*@unused@*/
 520 int poptSaveLong(/*@null@*/ long * arg, int argInfo, long aLong)
 521         /*@modifies *arg @*/
 522         /*@requires maxSet(arg) >= 0 /\ maxRead(arg) == 0 @*/;
 523 /*@=incondefs@*/
 524
 525 /**
 526  * Save an integer, performing logical operation with value.
 527  * @warning Alignment check may be too strict on certain platorms.
 528  * @param arg           integer pointer, aligned on int boundary.
 529  * @param argInfo       logical operation (see POPT_ARGFLAG_*)
 530  * @param aLong         value to use
 531  * @return              0 on success, POPT_ERROR_NULLARG/POPT_ERROR_BADOPERATION
 532  */
 533 /*@-incondefs@*/
 534 /*@unused@*/
 535 int poptSaveInt(/*@null@*/ int * arg, int argInfo, long aLong)
 536         /*@modifies *arg @*/
 537         /*@requires maxSet(arg) >= 0 /\ maxRead(arg) == 0 @*/;
 538 /*@=incondefs@*/
 539
 540 /*@=type@*/
 541 #ifdef  __cplusplus
 542 }
 543 #endif
 544
 545 #endif