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7752137a6a
* sysdeps/mach/hurd/mmap.c: Fix inverted test of MAP_FIXED. * stdio/vfscanf.c (number): Allow field width to inhibit first digit after base detection. * stdio/vfprintf.c (vfprintf: %s): Never search past the limit specified by the precision. * grp/grpread.c (__grpscan): New function. * grp/grp.h (__grpscan): Declare it. * grp/getgrgid.c: Use __grpscan. * grp/getgrnam.c: Likewise. * pwd/pwdread.c (__pwdscan): New function. * pwd/pwd.h (__pwdscan): Declare it. * pwd/getpwnam.c: Use __pwdscan. * pwd/getpwuid.c: Likewise. Thu Aug 24 16:29:40 1995 Roland McGrath <roland@churchy.gnu.ai.mit.edu> * sysdeps/mach/hurd/mmap.c: Treat (FLAGS & MAP_TYPE) == 0 like MAP_FILE. * hurd/thread-cancel.c: Return EINTR when called on self. * sysdeps/i386/elf/start.S (data_start): Define as weak alias for __data_start.
109 lines
3.3 KiB
C
109 lines
3.3 KiB
C
/* Copyright (C) 1994, 1995 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The GNU C 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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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If
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not, write to the Free Software Foundation, Inc., 675 Mass Ave,
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Cambridge, MA 02139, USA. */
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#include <sys/types.h>
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#include <sys/mman.h>
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#include <errno.h>
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#include <hurd.h>
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#include <hurd/fd.h>
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/* Map addresses starting near ADDR and extending for LEN bytes. from
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OFFSET into the file FD describes according to PROT and FLAGS. If ADDR
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is nonzero, it is the desired mapping address. If the MAP_FIXED bit is
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set in FLAGS, the mapping will be at ADDR exactly (which must be
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page-aligned); otherwise the system chooses a convenient nearby address.
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The return value is the actual mapping address chosen or (caddr_t) -1
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for errors (in which case `errno' is set). A successful `mmap' call
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deallocates any previous mapping for the affected region. */
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caddr_t
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__mmap (caddr_t addr, size_t len, int prot, int flags, int fd, off_t offset)
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{
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error_t err;
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vm_prot_t vmprot;
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memory_object_t memobj;
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vm_address_t mapaddr;
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vmprot = VM_PROT_NONE;
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if (prot & PROT_READ)
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vmprot |= VM_PROT_READ;
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if (prot & PROT_WRITE)
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vmprot |= VM_PROT_WRITE;
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if (prot & PROT_EXEC)
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vmprot |= VM_PROT_EXECUTE;
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switch (flags & MAP_TYPE)
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{
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default:
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return (caddr_t) (long int) __hurd_fail (EINVAL);
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case MAP_ANON:
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memobj = MACH_PORT_NULL;
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break;
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case MAP_FILE:
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case 0: /* Allow, e.g., just MAP_SHARED. */
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{
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mach_port_t robj, wobj;
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if (err = HURD_DPORT_USE (fd, __io_map (port, &robj, &wobj)))
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return (caddr_t) (long int) __hurd_dfail (fd, err);
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switch (prot & (PROT_READ|PROT_WRITE))
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{
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case PROT_READ:
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memobj = robj;
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__mach_port_deallocate (__mach_task_self (), wobj);
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break;
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case PROT_WRITE:
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memobj = wobj;
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__mach_port_deallocate (__mach_task_self (), robj);
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break;
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case PROT_READ|PROT_WRITE:
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__mach_port_deallocate (__mach_task_self (), robj);
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if (robj == wobj)
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memobj = wobj;
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else
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{
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__mach_port_deallocate (__mach_task_self (), wobj);
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return ((caddr_t) (long int)
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__hurd_fail (EGRATUITOUS)); /* XXX */
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}
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break;
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}
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break;
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/* XXX handle MAP_NOEXTEND */
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}
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}
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mapaddr = (vm_address_t) addr;
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err = __vm_map (__mach_task_self (),
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&mapaddr, (vm_size_t) len, (vm_address_t) 0,
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! (flags & MAP_FIXED),
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memobj, (vm_offset_t) offset,
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flags & (MAP_COPY|MAP_PRIVATE),
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vmprot, VM_PROT_ALL,
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flags & MAP_INHERIT);
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if (memobj != MACH_PORT_NULL)
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__mach_port_deallocate (__mach_task_self (), memobj);
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return err ? (caddr_t) (long int) __hurd_fail (err) : (caddr_t) mapaddr;
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}
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weak_alias (__mmap, mmap)
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