-/* opncls.c -- open and close a bfd. */
+/* opncls.c -- open and close a BFD.
+ Copyright (C) 1990-1991 Free Software Foundation, Inc.
+ Written by Cygnus Support.
-/* Copyright (C) 1990, 1991 Free Software Foundation, Inc.
+This file is part of BFD, the Binary File Descriptor library.
-This file is part of BFD, the Binary File Diddler.
-
-BFD is free software; you can redistribute it and/or modify
+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; either version 1, or (at your option)
-any later version.
+the Free Software Foundation; either version 2 of the License, or
+(at your option) any later version.
-BFD is distributed in the hope that it will be useful,
+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 BFD; see the file COPYING. If not, write to
-the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
+along with this program; if not, write to the Free Software
+Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
/* $Id$ */
-#include "sysdep.h"
+#include <sysdep.h>
#include "bfd.h"
#include "libbfd.h"
-
+#include "obstack.h"
extern void bfd_cache_init();
FILE *bfd_open_file();
/* fdopen is a loser -- we should use stdio exclusively. Unfortunately
if we do that we can't use fcntl. */
-\f
-/** Locking
-
- Locking is loosely controlled by the preprocessor variable
- BFD_LOCKS. I say loosely because Unix barely understands locking
- -- at least in BSD it doesn't affect programs which don't
- explicitly use it! That is to say it's practically useless, though
- if everyone uses this library you'll be OK.
-
- From among the many and varied lock facilities available, (none of
- which, of course, knows about any other) we use the fcntl locks,
- because they're Posix.
- The reason that bfd_openr and bfd_fdopenr exist, yet only bfd_openw
- exists is because of locking. When we do output, we lock the
- filename file for output, then open a temporary file which does not
- actually get its correct filename until closing time. This is
- safest, but requires the asymmetry in read and write entry points.
- Perhaps, since unix has so many different kinds of locking anyway,
- we should use the emacs lock scheme?... */
-
-extern PTR malloc();
-extern void free();
#define obstack_chunk_alloc malloc
#define obstack_chunk_free free
bfd *new_bfd()
{
- struct obstack tmp;
bfd *nbfd;
- obstack_begin(&tmp,128);
-
- nbfd = (bfd *)obstack_alloc(&tmp,sizeof(bfd));
- memset((PTR)nbfd, 0, sizeof (bfd)); /* Clear it */
- nbfd->memory = tmp;
+ nbfd = (bfd *)zalloc (sizeof (bfd));
+ if (!nbfd)
+ return 0;
+ obstack_begin(&nbfd->memory, 128);
+
nbfd->direction = no_direction;
nbfd->iostream = NULL;
nbfd->where = 0;
return nbfd;
}
-/** bfd_openr, bfd_fdopenr -- open for reading.
- Returns a pointer to a freshly-allocated bfd on success, or NULL. */
+/*doc*
+@section Opening and Closing BFDs
+
+*/
+/*proto*
+*i bfd_openr
+Opens the file supplied (using @code{fopen}) with the target supplied, it
+returns a pointer to the created BFD.
+
+If NULL is returned then an error has occured.
+Possible errors are no_memory, invalid_target or system_call error.
+*; PROTO(bfd*, bfd_openr, (CONST char *filename,CONST char*target));
+*-*/
bfd *
DEFUN(bfd_openr, (filename, target),
bfd *nbfd;
bfd_target *target_vec;
- target_vec = bfd_find_target (target);
- if (target_vec == NULL) {
- bfd_error = invalid_target;
- return NULL;
- }
-
- bfd_error = system_call_error;
nbfd = new_bfd();
if (nbfd == NULL) {
bfd_error = no_memory;
return NULL;
}
+ target_vec = bfd_find_target (target, nbfd);
+ if (target_vec == NULL) {
+ bfd_error = invalid_target;
+ return NULL;
+ }
+
nbfd->filename = filename;
- nbfd->xvec = target_vec;
nbfd->direction = read_direction;
if (bfd_open_file (nbfd) == NULL) {
close it if anything goes wrong. Closing the stream means closing
the file descriptor too, even though we didn't open it.
*/
+/*proto*
+*i bfd_fdopenr
+bfd_fdopenr is to bfd_fopenr much like fdopen is to fopen. It opens a BFD on
+a file already described by the @var{fd} supplied.
+
+Possible errors are no_memory, invalid_target and system_call error.
+*; PROTO(bfd *, bfd_fdopenr,
+ (CONST char *filename, CONST char *target, int fd));
+*-*/
bfd *
DEFUN(bfd_fdopenr,(filename, target, fd),
bfd *nbfd;
bfd_target *target_vec;
int fdflags;
-#ifdef BFD_LOCKS
- struct flock lock, *lockp = &lock;
-#endif
-
- target_vec = bfd_find_target (target);
- if (target_vec == NULL) {
- bfd_error = invalid_target;
- return NULL;
- }
bfd_error = system_call_error;
- fdflags = fcntl (fd, F_GETFL);
- if (fdflags == -1) return NULL;
-
-#ifdef BFD_LOCKS
- lockp->l_type = F_RDLCK;
- if (fcntl (fd, F_SETLKW, lockp) == -1) return NULL;
+#ifdef NO_FCNTL
+ fdflags = O_RDWR; /* Assume full access */
+#else
+ fdflags = fcntl (fd, F_GETFL, NULL);
#endif
+ if (fdflags == -1) return NULL;
nbfd = new_bfd();
bfd_error = no_memory;
return NULL;
}
-#ifdef BFD_LOCKS
- nbfd->lock = (struct flock *) (nbfd + 1);
-#endif
+
+ target_vec = bfd_find_target (target, nbfd);
+ if (target_vec == NULL) {
+ bfd_error = invalid_target;
+ return NULL;
+ }
+
/* if the fd were open for read only, this still would not hurt: */
nbfd->iostream = (char *) fdopen (fd, "r+");
if (nbfd->iostream == NULL) {
/* OK, put everything where it belongs */
nbfd->filename = filename;
- nbfd->xvec = target_vec;
/* As a special case we allow a FD open for read/write to
be written through, although doing so requires that we end
default: abort ();
}
-#ifdef BFD_LOCKS
- memcpy (nbfd->lock, lockp, sizeof (struct flock))
-#endif
-
- bfd_cache_init (nbfd);
+ bfd_cache_init (nbfd);
return nbfd;
}
\f
/** bfd_openw -- open for writing.
- Returns a pointer to a freshly-allocated bfd on success, or NULL.
+ Returns a pointer to a freshly-allocated BFD on success, or NULL.
See comment by bfd_fdopenr before you try to modify this function. */
+/*proto* bfd_openw
+Creates a BFD, associated with file @var{filename}, using the file
+format @var{target}, and returns a pointer to it.
+
+Possible errors are system_call_error, no_memory, invalid_target.
+*; PROTO(bfd *, bfd_openw, (CONST char *filename, CONST char *target));
+*/
+
bfd *
DEFUN(bfd_openw,(filename, target),
CONST char *filename AND
bfd *nbfd;
bfd_target *target_vec;
- target_vec = bfd_find_target (target);
- if (target_vec == NULL) return NULL;
-
bfd_error = system_call_error;
/* nbfd has to point to head of malloc'ed block so that bfd_close may
return NULL;
}
+ target_vec = bfd_find_target (target, nbfd);
+ if (target_vec == NULL) return NULL;
+
nbfd->filename = filename;
- nbfd->xvec = target_vec;
nbfd->direction = write_direction;
if (bfd_open_file (nbfd) == NULL) {
return nbfd;
}
+/*proto* bfd_close
+This function closes a BFD. If the BFD was open for writing, then
+pending operations are completed and the file written out and closed.
+If the created file is executable, then @code{chmod} is called to mark
+it as such.
+
+All memory attached to the BFD's obstacks is released.
+
+@code{true} is returned if all is ok, otherwise @code{false}.
+*; PROTO(boolean, bfd_close,(bfd *));
+*/
-\f
-/** Close up shop, get your deposit back. */
boolean
-bfd_close (abfd)
- bfd *abfd;
+DEFUN(bfd_close,(abfd),
+ bfd *abfd)
{
+ if (!bfd_read_p(abfd))
+ if (BFD_SEND_FMT (abfd, _bfd_write_contents, (abfd)) != true)
+ return false;
+
if (BFD_SEND (abfd, _close_and_cleanup, (abfd)) != true) return false;
bfd_cache_close(abfd);
-/* If the file was open for writing and is now executable
- make it so */
+
+ /* If the file was open for writing and is now executable,
+ make it so */
if (abfd->direction == write_direction
&& abfd->flags & EXEC_P) {
struct stat buf;
stat(abfd->filename, &buf);
+#ifndef S_IXUSR
+#define S_IXUSR 0100 /* Execute by owner. */
+#endif
+#ifndef S_IXGRP
+#define S_IXGRP 0010 /* Execute by group. */
+#endif
+#ifndef S_IXOTH
+#define S_IXOTH 0001 /* Execute by others. */
+#endif
+
chmod(abfd->filename,buf.st_mode | S_IXUSR | S_IXGRP | S_IXOTH);
}
(void) obstack_free (&abfd->memory, (PTR)0);
+ /* FIXME, shouldn't we de-allocate the bfd as well? */
return true;
}
-/* Create a bfd with no associated file or target. */
+/*proto* bfd_create
+This routine creates a new BFD in the manner of @code{bfd_openw}, but without
+opening a file. The new BFD takes the target from the target used by
+@var{template}. The format is always set to @code{bfd_object}.
+
+*; PROTO(bfd *, bfd_create, (CONST char *filename, bfd *template));
+*/
bfd *
DEFUN(bfd_create,(filename, template),
CONST char *filename AND
- CONST bfd *template)
+ bfd *template)
{
bfd *nbfd = new_bfd();
if (nbfd == (bfd *)NULL) {
/* Memory allocation */
+DEFUN(PTR bfd_alloc_by_size_t,(abfd, size),
+ bfd *abfd AND
+ size_t size)
+{
+ PTR res = obstack_alloc(&(abfd->memory), size);
+ return res;
+}
+
+DEFUN(void bfd_alloc_grow,(abfd, ptr, size),
+ bfd *abfd AND
+ PTR ptr AND
+ bfd_size_type size)
+{
+ (void) obstack_grow(&(abfd->memory), ptr, size);
+}
+DEFUN(PTR bfd_alloc_finish,(abfd),
+ bfd *abfd)
+{
+ return obstack_finish(&(abfd->memory));
+}
+
DEFUN(PTR bfd_alloc, (abfd, size),
bfd *abfd AND
bfd_size_type size)
{
- PTR res = obstack_alloc(&(abfd->memory), (int)size);
- return res;
+ return bfd_alloc_by_size_t(abfd, (size_t)size);
}
DEFUN(PTR bfd_zalloc,(abfd, size),
return res;
}
+/*proto* bfd_alloc_size
+Return the number of bytes in the obstacks connected to the supplied
+BFD.
+*; PROTO(bfd_size_type,bfd_alloc_size,(bfd *abfd));
+*/
-DEFUN(bfd_size_type bfd_alloc_size,(abfd),
+bfd_size_type
+DEFUN( bfd_alloc_size,(abfd),
bfd *abfd)
{
struct _obstack_chunk *chunk = abfd->memory.chunk;
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