1 /* Function declarations for libiberty.
2 
3    Copyright (C) 1997-2016 Free Software Foundation, Inc.
4 
5    Note - certain prototypes declared in this header file are for
6    functions whoes implementation copyright does not belong to the
7    FSF.  Those prototypes are present in this file for reference
8    purposes only and their presence in this file should not construed
9    as an indication of ownership by the FSF of the implementation of
10    those functions in any way or form whatsoever.
11 
12    This program is free software; you can redistribute it and/or modify
13    it under the terms of the GNU General Public License as published by
14    the Free Software Foundation; either version 2, or (at your option)
15    any later version.
16 
17    This program is distributed in the hope that it will be useful,
18    but WITHOUT ANY WARRANTY; without even the implied warranty of
19    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
20    GNU General Public License for more details.
21 
22    You should have received a copy of the GNU General Public License
23    along with this program; if not, write to the Free Software
24    Foundation, Inc., 51 Franklin Street - Fifth Floor,
25    Boston, MA 02110-1301, USA.
26 
27    Written by Cygnus Support, 1994.
28 
29    The libiberty library provides a number of functions which are
30    missing on some operating systems.  We do not declare those here,
31    to avoid conflicts with the system header files on operating
32    systems that do support those functions.  In this file we only
33    declare those functions which are specific to libiberty.  */
34 
35 #ifndef LIBIBERTY_H
36 #define LIBIBERTY_H
37 
38 #ifdef __cplusplus
39 extern "C" {
40 #endif
41 
42 #include "ansidecl.h"
43 
44 /* Get a definition for size_t.  */
45 #include <stddef.h>
46 /* Get a definition for va_list.  */
47 #include <stdarg.h>
48 
49 #include <stdio.h>
50 
51 /* If the OS supports it, ensure that the supplied stream is setup to
52    avoid any multi-threaded locking.  Otherwise leave the FILE pointer
53    unchanged.  If the stream is NULL do nothing.  */
54 
55 extern void unlock_stream (FILE *);
56 
57 /* If the OS supports it, ensure that the standard I/O streams, stdin,
58    stdout and stderr are setup to avoid any multi-threaded locking.
59    Otherwise do nothing.  */
60 
61 extern void unlock_std_streams (void);
62 
63 /* Open and return a FILE pointer.  If the OS supports it, ensure that
64    the stream is setup to avoid any multi-threaded locking.  Otherwise
65    return the FILE pointer unchanged.  */
66 
67 extern FILE *fopen_unlocked (const char *, const char *);
68 extern FILE *fdopen_unlocked (int, const char *);
69 extern FILE *freopen_unlocked (const char *, const char *, FILE *);
70 
71 /* Build an argument vector from a string.  Allocates memory using
72    malloc.  Use freeargv to free the vector.  */
73 
74 extern char **buildargv (const char *) ATTRIBUTE_MALLOC;
75 
76 /* Free a vector returned by buildargv.  */
77 
78 extern void freeargv (char **);
79 
80 /* Duplicate an argument vector. Allocates memory using malloc.  Use
81    freeargv to free the vector.  */
82 
83 extern char **dupargv (char * const *) ATTRIBUTE_MALLOC;
84 
85 /* Expand "@file" arguments in argv.  */
86 
87 extern void expandargv (int *, char ***);
88 
89 /* Write argv to an @-file, inserting necessary quoting.  */
90 
91 extern int writeargv (char * const *, FILE *);
92 
93 /* Return the number of elements in argv.  */
94 
95 extern int countargv (char * const *);
96 
97 /* Return the last component of a path name.  Note that we can't use a
98    prototype here because the parameter is declared inconsistently
99    across different systems, sometimes as "char *" and sometimes as
100    "const char *" */
101 
102 /* HAVE_DECL_* is a three-state macro: undefined, 0 or 1.  If it is
103    undefined, we haven't run the autoconf check so provide the
104    declaration without arguments.  If it is 0, we checked and failed
105    to find the declaration so provide a fully prototyped one.  If it
106    is 1, we found it so don't provide any declaration at all.  */
107 #if !HAVE_DECL_BASENAME
108 #if defined (__GNU_LIBRARY__ ) || defined (__linux__) \
109  || defined (__FreeBSD__) || defined (__OpenBSD__) || defined (__NetBSD__) \
110  || defined (__CYGWIN__) || defined (__CYGWIN32__) || defined (__MINGW32__) \
111  || defined (__DragonFly__) || defined (HAVE_DECL_BASENAME)
112 extern char *basename (const char *) ATTRIBUTE_RETURNS_NONNULL ATTRIBUTE_NONNULL(1);
113 #else
114 /* Do not allow basename to be used if there is no prototype seen.  We
115    either need to use the above prototype or have one from
116    autoconf which would result in HAVE_DECL_BASENAME being set.  */
117 #define basename basename_cannot_be_used_without_a_prototype
118 #endif
119 #endif
120 
121 /* A well-defined basename () that is always compiled in.  */
122 
123 extern const char *lbasename (const char *) ATTRIBUTE_RETURNS_NONNULL ATTRIBUTE_NONNULL(1);
124 
125 /* Same, but assumes DOS semantics (drive name, backslash is also a
126    dir separator) regardless of host.  */
127 
128 extern const char *dos_lbasename (const char *) ATTRIBUTE_RETURNS_NONNULL ATTRIBUTE_NONNULL(1);
129 
130 /* Same, but assumes Unix semantics (absolute paths always start with
131    a slash, only forward slash is accepted as dir separator)
132    regardless of host.  */
133 
134 extern const char *unix_lbasename (const char *) ATTRIBUTE_RETURNS_NONNULL ATTRIBUTE_NONNULL(1);
135 
136 /* A well-defined realpath () that is always compiled in.  */
137 
138 extern char *lrealpath (const char *);
139 
140 /* Concatenate an arbitrary number of strings.  You must pass NULL as
141    the last argument of this function, to terminate the list of
142    strings.  Allocates memory using xmalloc.  */
143 
144 extern char *concat (const char *, ...) ATTRIBUTE_MALLOC ATTRIBUTE_RETURNS_NONNULL ATTRIBUTE_SENTINEL;
145 
146 /* Concatenate an arbitrary number of strings.  You must pass NULL as
147    the last argument of this function, to terminate the list of
148    strings.  Allocates memory using xmalloc.  The first argument is
149    not one of the strings to be concatenated, but if not NULL is a
150    pointer to be freed after the new string is created, similar to the
151    way xrealloc works.  */
152 
153 extern char *reconcat (char *, const char *, ...) ATTRIBUTE_MALLOC ATTRIBUTE_RETURNS_NONNULL ATTRIBUTE_SENTINEL;
154 
155 /* Determine the length of concatenating an arbitrary number of
156    strings.  You must pass NULL as the last argument of this function,
157    to terminate the list of strings.  */
158 
159 extern unsigned long concat_length (const char *, ...) ATTRIBUTE_SENTINEL;
160 
161 /* Concatenate an arbitrary number of strings into a SUPPLIED area of
162    memory.  You must pass NULL as the last argument of this function,
163    to terminate the list of strings.  The supplied memory is assumed
164    to be large enough.  */
165 
166 extern char *concat_copy (char *, const char *, ...) ATTRIBUTE_RETURNS_NONNULL ATTRIBUTE_NONNULL(1) ATTRIBUTE_SENTINEL;
167 
168 /* Concatenate an arbitrary number of strings into a GLOBAL area of
169    memory.  You must pass NULL as the last argument of this function,
170    to terminate the list of strings.  The supplied memory is assumed
171    to be large enough.  */
172 
173 extern char *concat_copy2 (const char *, ...) ATTRIBUTE_RETURNS_NONNULL ATTRIBUTE_SENTINEL;
174 
175 /* This is the global area used by concat_copy2.  */
176 
177 extern char *libiberty_concat_ptr;
178 
179 /* Concatenate an arbitrary number of strings.  You must pass NULL as
180    the last argument of this function, to terminate the list of
181    strings.  Allocates memory using alloca.  The arguments are
182    evaluated twice!  */
183 #define ACONCAT(ACONCAT_PARAMS) \
184   (libiberty_concat_ptr = (char *) alloca (concat_length ACONCAT_PARAMS + 1), \
185    concat_copy2 ACONCAT_PARAMS)
186 
187 /* Check whether two file descriptors refer to the same file.  */
188 
189 extern int fdmatch (int fd1, int fd2);
190 
191 /* Return the position of the first bit set in the argument.  */
192 /* Prototypes vary from system to system, so we only provide a
193    prototype on systems where we know that we need it.  */
194 #if defined (HAVE_DECL_FFS) && !HAVE_DECL_FFS
195 extern int ffs(int);
196 #endif
197 
198 /* Get the working directory.  The result is cached, so don't call
199    chdir() between calls to getpwd().  */
200 
201 extern char * getpwd (void);
202 
203 /* Get the current time.  */
204 /* Prototypes vary from system to system, so we only provide a
205    prototype on systems where we know that we need it.  */
206 #ifdef __MINGW32__
207 /* Forward declaration to avoid #include <sys/time.h>.   */
208 struct timeval;
209 extern int gettimeofday (struct timeval *, void *);
210 #endif
211 
212 /* Get the amount of time the process has run, in microseconds.  */
213 
214 extern long get_run_time (void);
215 
216 /* Generate a relocated path to some installation directory.  Allocates
217    return value using malloc.  */
218 
219 extern char *make_relative_prefix (const char *, const char *,
220                                    const char *) ATTRIBUTE_MALLOC;
221 
222 /* Generate a relocated path to some installation directory without
223    attempting to follow any soft links.  Allocates
224    return value using malloc.  */
225 
226 extern char *make_relative_prefix_ignore_links (const char *, const char *,
227 						const char *) ATTRIBUTE_MALLOC;
228 
229 /* Returns a pointer to a directory path suitable for creating temporary
230    files in.  */
231 
232 extern const char *choose_tmpdir (void) ATTRIBUTE_RETURNS_NONNULL;
233 
234 /* Choose a temporary directory to use for scratch files.  */
235 
236 extern char *choose_temp_base (void) ATTRIBUTE_MALLOC ATTRIBUTE_RETURNS_NONNULL;
237 
238 /* Return a temporary file name or NULL if unable to create one.  */
239 
240 extern char *make_temp_file (const char *) ATTRIBUTE_MALLOC;
241 
242 /* Remove a link to a file unless it is special. */
243 
244 extern int unlink_if_ordinary (const char *);
245 
246 /* Allocate memory filled with spaces.  Allocates using malloc.  */
247 
248 extern const char *spaces (int count);
249 
250 /* Return the maximum error number for which strerror will return a
251    string.  */
252 
253 extern int errno_max (void);
254 
255 /* Return the name of an errno value (e.g., strerrno (EINVAL) returns
256    "EINVAL").  */
257 
258 extern const char *strerrno (int);
259 
260 /* Given the name of an errno value, return the value.  */
261 
262 extern int strtoerrno (const char *);
263 
264 /* ANSI's strerror(), but more robust.  */
265 
266 extern char *xstrerror (int) ATTRIBUTE_RETURNS_NONNULL;
267 
268 /* Return the maximum signal number for which strsignal will return a
269    string.  */
270 
271 extern int signo_max (void);
272 
273 /* Return a signal message string for a signal number
274    (e.g., strsignal (SIGHUP) returns something like "Hangup").  */
275 /* This is commented out as it can conflict with one in system headers.
276    We still document its existence though.  */
277 
278 /*extern const char *strsignal (int);*/
279 
280 /* Return the name of a signal number (e.g., strsigno (SIGHUP) returns
281    "SIGHUP").  */
282 
283 extern const char *strsigno (int);
284 
285 /* Given the name of a signal, return its number.  */
286 
287 extern int strtosigno (const char *);
288 
289 /* Register a function to be run by xexit.  Returns 0 on success.  */
290 
291 extern int xatexit (void (*fn) (void));
292 
293 /* Exit, calling all the functions registered with xatexit.  */
294 
295 extern void xexit (int status) ATTRIBUTE_NORETURN;
296 
297 /* Set the program name used by xmalloc.  */
298 
299 extern void xmalloc_set_program_name (const char *);
300 
301 /* Report an allocation failure.  */
302 extern void xmalloc_failed (size_t) ATTRIBUTE_NORETURN;
303 
304 /* Allocate memory without fail.  If malloc fails, this will print a
305    message to stderr (using the name set by xmalloc_set_program_name,
306    if any) and then call xexit.  */
307 
308 extern void *xmalloc (size_t) ATTRIBUTE_MALLOC ATTRIBUTE_RETURNS_NONNULL;
309 
310 /* Reallocate memory without fail.  This works like xmalloc.  Note,
311    realloc type functions are not suitable for attribute malloc since
312    they may return the same address across multiple calls. */
313 
314 extern void *xrealloc (void *, size_t) ATTRIBUTE_RETURNS_NONNULL;
315 
316 /* Allocate memory without fail and set it to zero.  This works like
317    xmalloc.  */
318 
319 extern void *xcalloc (size_t, size_t) ATTRIBUTE_MALLOC ATTRIBUTE_RETURNS_NONNULL;
320 
321 /* Copy a string into a memory buffer without fail.  */
322 
323 extern char *xstrdup (const char *) ATTRIBUTE_MALLOC ATTRIBUTE_RETURNS_NONNULL;
324 
325 /* Copy at most N characters from string into a buffer without fail.  */
326 
327 extern char *xstrndup (const char *, size_t) ATTRIBUTE_MALLOC ATTRIBUTE_RETURNS_NONNULL;
328 
329 /* Copy an existing memory buffer to a new memory buffer without fail.  */
330 
331 extern void *xmemdup (const void *, size_t, size_t) ATTRIBUTE_MALLOC ATTRIBUTE_RETURNS_NONNULL;
332 
333 /* Physical memory routines.  Return values are in BYTES.  */
334 extern double physmem_total (void);
335 extern double physmem_available (void);
336 
337 /* Compute the 32-bit CRC of a block of memory.  */
338 extern unsigned int xcrc32 (const unsigned char *, int, unsigned int);
339 
340 /* These macros provide a K&R/C89/C++-friendly way of allocating structures
341    with nice encapsulation.  The XDELETE*() macros are technically
342    superfluous, but provided here for symmetry.  Using them consistently
343    makes it easier to update client code to use different allocators such
344    as new/delete and new[]/delete[].  */
345 
346 /* Scalar allocators.  */
347 
348 #define XALLOCA(T)		((T *) alloca (sizeof (T)))
349 #define XNEW(T)			((T *) xmalloc (sizeof (T)))
350 #define XCNEW(T)		((T *) xcalloc (1, sizeof (T)))
351 #define XDUP(T, P)		((T *) xmemdup ((P), sizeof (T), sizeof (T)))
352 #define XDELETE(P)		free ((void*) (P))
353 
354 /* Array allocators.  */
355 
356 #define XALLOCAVEC(T, N)	((T *) alloca (sizeof (T) * (N)))
357 #define XNEWVEC(T, N)		((T *) xmalloc (sizeof (T) * (N)))
358 #define XCNEWVEC(T, N)		((T *) xcalloc ((N), sizeof (T)))
359 #define XDUPVEC(T, P, N)	((T *) xmemdup ((P), sizeof (T) * (N), sizeof (T) * (N)))
360 #define XRESIZEVEC(T, P, N)	((T *) xrealloc ((void *) (P), sizeof (T) * (N)))
361 #define XDELETEVEC(P)		free ((void*) (P))
362 
363 /* Allocators for variable-sized structures and raw buffers.  */
364 
365 #define XALLOCAVAR(T, S)	((T *) alloca ((S)))
366 #define XNEWVAR(T, S)		((T *) xmalloc ((S)))
367 #define XCNEWVAR(T, S)		((T *) xcalloc (1, (S)))
368 #define XDUPVAR(T, P, S1, S2)	((T *) xmemdup ((P), (S1), (S2)))
369 #define XRESIZEVAR(T, P, S)	((T *) xrealloc ((P), (S)))
370 
371 /* Type-safe obstack allocator.  */
372 
373 #define XOBNEW(O, T)		((T *) obstack_alloc ((O), sizeof (T)))
374 #define XOBNEWVEC(O, T, N)	((T *) obstack_alloc ((O), sizeof (T) * (N)))
375 #define XOBNEWVAR(O, T, S)	((T *) obstack_alloc ((O), (S)))
376 #define XOBFINISH(O, T)         ((T) obstack_finish ((O)))
377 
378 /* hex character manipulation routines */
379 
380 #define _hex_array_size 256
381 #define _hex_bad	99
382 extern const unsigned char _hex_value[_hex_array_size];
383 extern void hex_init (void);
384 #define hex_p(c)	(hex_value (c) != _hex_bad)
385 /* If you change this, note well: Some code relies on side effects in
386    the argument being performed exactly once.  */
387 #define hex_value(c)	((unsigned int) _hex_value[(unsigned char) (c)])
388 
389 /* Flags for pex_init.  These are bits to be or'ed together.  */
390 
391 /* Record subprocess times, if possible.  */
392 #define PEX_RECORD_TIMES	0x1
393 
394 /* Use pipes for communication between processes, if possible.  */
395 #define PEX_USE_PIPES		0x2
396 
397 /* Save files used for communication between processes.  */
398 #define PEX_SAVE_TEMPS		0x4
399 
400 /* Prepare to execute one or more programs, with standard output of
401    each program fed to standard input of the next.
402    FLAGS	As above.
403    PNAME	The name of the program to report in error messages.
404    TEMPBASE	A base name to use for temporary files; may be NULL to
405    		use a random name.
406    Returns NULL on error.  */
407 
408 extern struct pex_obj *pex_init (int flags, const char *pname,
409 				 const char *tempbase) ATTRIBUTE_RETURNS_NONNULL;
410 
411 /* Flags for pex_run.  These are bits to be or'ed together.  */
412 
413 /* Last program in pipeline.  Standard output of program goes to
414    OUTNAME, or, if OUTNAME is NULL, to standard output of caller.  Do
415    not set this if you want to call pex_read_output.  After this is
416    set, pex_run may no longer be called with the same struct
417    pex_obj.  */
418 #define PEX_LAST		0x1
419 
420 /* Search for program in executable search path.  */
421 #define PEX_SEARCH		0x2
422 
423 /* OUTNAME is a suffix.  */
424 #define PEX_SUFFIX		0x4
425 
426 /* Send program's standard error to standard output.  */
427 #define PEX_STDERR_TO_STDOUT	0x8
428 
429 /* Input file should be opened in binary mode.  This flag is ignored
430    on Unix.  */
431 #define PEX_BINARY_INPUT	0x10
432 
433 /* Output file should be opened in binary mode.  This flag is ignored
434    on Unix.  For proper behaviour PEX_BINARY_INPUT and
435    PEX_BINARY_OUTPUT have to match appropriately--i.e., a call using
436    PEX_BINARY_OUTPUT should be followed by a call using
437    PEX_BINARY_INPUT.  */
438 #define PEX_BINARY_OUTPUT	0x20
439 
440 /* Capture stderr to a pipe.  The output can be read by
441    calling pex_read_err and reading from the returned
442    FILE object.  This flag may be specified only for
443    the last program in a pipeline.
444 
445    This flag is supported only on Unix and Windows.  */
446 #define PEX_STDERR_TO_PIPE	0x40
447 
448 /* Capture stderr in binary mode.  This flag is ignored
449    on Unix.  */
450 #define PEX_BINARY_ERROR	0x80
451 
452 /* Append stdout to existing file instead of truncating it.  */
453 #define PEX_STDOUT_APPEND	0x100
454 
455 /* Thes same as PEX_STDOUT_APPEND, but for STDERR.  */
456 #define PEX_STDERR_APPEND	0x200
457 
458 /* Execute one program.  Returns NULL on success.  On error returns an
459    error string (typically just the name of a system call); the error
460    string is statically allocated.
461 
462    OBJ		Returned by pex_init.
463 
464    FLAGS	As above.
465 
466    EXECUTABLE	The program to execute.
467 
468    ARGV		NULL terminated array of arguments to pass to the program.
469 
470    OUTNAME	Sets the output file name as follows:
471 
472 		PEX_SUFFIX set (OUTNAME may not be NULL):
473 		  TEMPBASE parameter to pex_init not NULL:
474 		    Output file name is the concatenation of TEMPBASE
475 		    and OUTNAME.
476 		  TEMPBASE is NULL:
477 		    Output file name is a random file name ending in
478 		    OUTNAME.
479 		PEX_SUFFIX not set:
480 		  OUTNAME not NULL:
481 		    Output file name is OUTNAME.
482 		  OUTNAME NULL, TEMPBASE not NULL:
483 		    Output file name is randomly chosen using
484 		    TEMPBASE.
485 		  OUTNAME NULL, TEMPBASE NULL:
486 		    Output file name is randomly chosen.
487 
488 		If PEX_LAST is not set, the output file name is the
489    		name to use for a temporary file holding stdout, if
490    		any (there will not be a file if PEX_USE_PIPES is set
491    		and the system supports pipes).  If a file is used, it
492    		will be removed when no longer needed unless
493    		PEX_SAVE_TEMPS is set.
494 
495 		If PEX_LAST is set, and OUTNAME is not NULL, standard
496    		output is written to the output file name.  The file
497    		will not be removed.  If PEX_LAST and PEX_SUFFIX are
498    		both set, TEMPBASE may not be NULL.
499 
500    ERRNAME	If not NULL, this is the name of a file to which
501 		standard error is written.  If NULL, standard error of
502 		the program is standard error of the caller.
503 
504    ERR		On an error return, *ERR is set to an errno value, or
505    		to 0 if there is no relevant errno.
506 */
507 
508 extern const char *pex_run (struct pex_obj *obj, int flags,
509 			    const char *executable, char * const *argv,
510 			    const char *outname, const char *errname,
511 			    int *err);
512 
513 /* As for pex_run (), but takes an extra parameter to enable the
514    environment for the child process to be specified.
515 
516    ENV		The environment for the child process, specified as
517 		an array of character pointers.  Each element of the
518 		array should point to a string of the form VAR=VALUE,
519                 with the exception of the last element which must be
520                 a null pointer.
521 */
522 
523 extern const char *pex_run_in_environment (struct pex_obj *obj, int flags,
524 			                   const char *executable,
525                                            char * const *argv,
526                                            char * const *env,
527               	          		   const char *outname,
528 					   const char *errname, int *err);
529 
530 /* Return a stream for a temporary file to pass to the first program
531    in the pipeline as input.  The file name is chosen as for pex_run.
532    pex_run closes the file automatically; don't close it yourself.  */
533 
534 extern FILE *pex_input_file (struct pex_obj *obj, int flags,
535                              const char *in_name);
536 
537 /* Return a stream for a pipe connected to the standard input of the
538    first program in the pipeline.  You must have passed
539    `PEX_USE_PIPES' to `pex_init'.  Close the returned stream
540    yourself.  */
541 
542 extern FILE *pex_input_pipe (struct pex_obj *obj, int binary);
543 
544 /* Read the standard output of the last program to be executed.
545    pex_run can not be called after this.  BINARY should be non-zero if
546    the file should be opened in binary mode; this is ignored on Unix.
547    Returns NULL on error.  Don't call fclose on the returned FILE; it
548    will be closed by pex_free.  */
549 
550 extern FILE *pex_read_output (struct pex_obj *, int binary);
551 
552 /* Read the standard error of the last program to be executed.
553    pex_run can not be called after this.  BINARY should be non-zero if
554    the file should be opened in binary mode; this is ignored on Unix.
555    Returns NULL on error.  Don't call fclose on the returned FILE; it
556    will be closed by pex_free.  */
557 
558 extern FILE *pex_read_err (struct pex_obj *, int binary);
559 
560 /* Return exit status of all programs in VECTOR.  COUNT indicates the
561    size of VECTOR.  The status codes in the vector are in the order of
562    the calls to pex_run.  Returns 0 on error, 1 on success.  */
563 
564 extern int pex_get_status (struct pex_obj *, int count, int *vector);
565 
566 /* Return times of all programs in VECTOR.  COUNT indicates the size
567    of VECTOR.  struct pex_time is really just struct timeval, but that
568    is not portable to all systems.  Returns 0 on error, 1 on
569    success.  */
570 
571 struct pex_time
572 {
573   unsigned long user_seconds;
574   unsigned long user_microseconds;
575   unsigned long system_seconds;
576   unsigned long system_microseconds;
577 };
578 
579 extern int pex_get_times (struct pex_obj *, int count,
580 			  struct pex_time *vector);
581 
582 /* Clean up a pex_obj.  If you have not called pex_get_times or
583    pex_get_status, this will try to kill the subprocesses.  */
584 
585 extern void pex_free (struct pex_obj *);
586 
587 /* Just execute one program.  Return value is as for pex_run.
588    FLAGS	Combination of PEX_SEARCH and PEX_STDERR_TO_STDOUT.
589    EXECUTABLE	As for pex_run.
590    ARGV		As for pex_run.
591    PNAME	As for pex_init.
592    OUTNAME	As for pex_run when PEX_LAST is set.
593    ERRNAME	As for pex_run.
594    STATUS	Set to exit status on success.
595    ERR		As for pex_run.
596 */
597 
598 extern const char *pex_one (int flags, const char *executable,
599 			    char * const *argv, const char *pname,
600 			    const char *outname, const char *errname,
601 			    int *status, int *err);
602 
603 /* pexecute and pwait are the old pexecute interface, still here for
604    backward compatibility.  Don't use these for new code.  Instead,
605    use pex_init/pex_run/pex_get_status/pex_free, or pex_one.  */
606 
607 /* Definitions used by the pexecute routine.  */
608 
609 #define PEXECUTE_FIRST   1
610 #define PEXECUTE_LAST    2
611 #define PEXECUTE_ONE     (PEXECUTE_FIRST + PEXECUTE_LAST)
612 #define PEXECUTE_SEARCH  4
613 #define PEXECUTE_VERBOSE 8
614 
615 /* Execute a program.  */
616 
617 extern int pexecute (const char *, char * const *, const char *,
618                      const char *, char **, char **, int);
619 
620 /* Wait for pexecute to finish.  */
621 
622 extern int pwait (int, int *, int);
623 
624 #if defined(HAVE_DECL_ASPRINTF) && !HAVE_DECL_ASPRINTF
625 /* Like sprintf but provides a pointer to malloc'd storage, which must
626    be freed by the caller.  */
627 
628 extern int asprintf (char **, const char *, ...) ATTRIBUTE_PRINTF_2;
629 #endif
630 
631 /* Like asprintf but allocates memory without fail. This works like
632    xmalloc.  */
633 
634 extern char *xasprintf (const char *, ...) ATTRIBUTE_MALLOC ATTRIBUTE_PRINTF_1;
635 
636 #if !HAVE_DECL_VASPRINTF
637 /* Like vsprintf but provides a pointer to malloc'd storage, which
638    must be freed by the caller.  */
639 
640 extern int vasprintf (char **, const char *, va_list) ATTRIBUTE_PRINTF(2,0);
641 #endif
642 
643 /* Like vasprintf but allocates memory without fail. This works like
644    xmalloc.  */
645 
646 extern char *xvasprintf (const char *, va_list) ATTRIBUTE_MALLOC ATTRIBUTE_PRINTF(1,0);
647 
648 #if defined(HAVE_DECL_SNPRINTF) && !HAVE_DECL_SNPRINTF
649 /* Like sprintf but prints at most N characters.  */
650 extern int snprintf (char *, size_t, const char *, ...) ATTRIBUTE_PRINTF_3;
651 #endif
652 
653 #if defined(HAVE_DECL_VSNPRINTF) && !HAVE_DECL_VSNPRINTF
654 /* Like vsprintf but prints at most N characters.  */
655 extern int vsnprintf (char *, size_t, const char *, va_list) ATTRIBUTE_PRINTF(3,0);
656 #endif
657 
658 #if defined (HAVE_DECL_STRNLEN) && !HAVE_DECL_STRNLEN
659 extern size_t strnlen (const char *, size_t);
660 #endif
661 
662 #if defined(HAVE_DECL_STRVERSCMP) && !HAVE_DECL_STRVERSCMP
663 /* Compare version strings.  */
664 extern int strverscmp (const char *, const char *);
665 #endif
666 
667 #if defined(HAVE_DECL_STRTOL) && !HAVE_DECL_STRTOL
668 extern long int strtol (const char *nptr,
669                         char **endptr, int base);
670 #endif
671 
672 #if defined(HAVE_DECL_STRTOUL) && !HAVE_DECL_STRTOUL
673 extern unsigned long int strtoul (const char *nptr,
674                                   char **endptr, int base);
675 #endif
676 
677 #if defined(HAVE_LONG_LONG) && defined(HAVE_DECL_STRTOLL) && !HAVE_DECL_STRTOLL
678 __extension__
679 extern long long int strtoll (const char *nptr,
680                               char **endptr, int base);
681 #endif
682 
683 #if defined(HAVE_LONG_LONG) && defined(HAVE_DECL_STRTOULL) && !HAVE_DECL_STRTOULL
684 __extension__
685 extern unsigned long long int strtoull (const char *nptr,
686                                         char **endptr, int base);
687 #endif
688 
689 #if defined(HAVE_DECL_STRVERSCMP) && !HAVE_DECL_STRVERSCMP
690 /* Compare version strings.  */
691 extern int strverscmp (const char *, const char *);
692 #endif
693 
694 /* Set the title of a process */
695 extern void setproctitle (const char *name, ...);
696 
697 /* Increase stack limit if possible.  */
698 extern void stack_limit_increase (unsigned long);
699 
700 #define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
701 
702 /* Drastically simplified alloca configurator.  If we're using GCC,
703    we use __builtin_alloca; otherwise we use the C alloca.  The C
704    alloca is always available.  You can override GCC by defining
705    USE_C_ALLOCA yourself.  The canonical autoconf macro C_ALLOCA is
706    also set/unset as it is often used to indicate whether code needs
707    to call alloca(0).  */
708 extern void *C_alloca (size_t) ATTRIBUTE_MALLOC;
709 #undef alloca
710 #if GCC_VERSION >= 2000 && !defined USE_C_ALLOCA
711 # define alloca(x) __builtin_alloca(x)
712 # undef C_ALLOCA
713 # define ASTRDUP(X) \
714   (__extension__ ({ const char *const libiberty_optr = (X); \
715    const unsigned long libiberty_len = strlen (libiberty_optr) + 1; \
716    char *const libiberty_nptr = (char *const) alloca (libiberty_len); \
717    (char *) memcpy (libiberty_nptr, libiberty_optr, libiberty_len); }))
718 #else
719 # define alloca(x) C_alloca(x)
720 # undef USE_C_ALLOCA
721 # define USE_C_ALLOCA 1
722 # undef C_ALLOCA
723 # define C_ALLOCA 1
724 extern const char *libiberty_optr;
725 extern char *libiberty_nptr;
726 extern unsigned long libiberty_len;
727 # define ASTRDUP(X) \
728   (libiberty_optr = (X), \
729    libiberty_len = strlen (libiberty_optr) + 1, \
730    libiberty_nptr = (char *) alloca (libiberty_len), \
731    (char *) memcpy (libiberty_nptr, libiberty_optr, libiberty_len))
732 #endif
733 
734 #ifdef __cplusplus
735 }
736 #endif
737 
738 
739 #endif /* ! defined (LIBIBERTY_H) */
740