5e2cbfb6e8
* Makefile.am: Copy and install headers from sys/machine/include directory. Also pass $toollibdir to lower-level directories. * Makefile.in: Regenerated. * libc/include/stdio.h[!_REENT_ONLY]: Change stdin, stdout, and stderr to use _REENT macro instead of _impure_ptr directly. * libc/include/sys/config.h[__i386__][__linux__]: Define __DYNAMIC_REENT__. * libc/include/sys/reent.h[!_REENT_ONLY]: Change _REENT macro to be call to __getreent() function if !__SINGLE_THREAD__ and __DYNAMIC_REENT__ is set. * libc/reent/Makefile.am: Add support for getreent.c. * libc/reent/Makefile.in: Regenerated. * libc/string/strerror.c: Add check if EOPNOTSUPP and ENOTSUP are same. * libc/sys/linux/Makefile.am: Add support for new files. * libc/sys/linux/configure.in: Add $EXTRA_DIRS variable. * libc/sys/linux/Makefile.in: Regenerated. * libc/sys/linux/configure: Ditto. * libc/sys/linux/io.c: Add poll syscall. Also weak-alias __close, __read, __write, __poll, __open, __lseek, __fcntl from their __libc_ counterparts. * libc/sys/linux/io64.c: Add __libc_ prefix to lseek64 and open64 and weak-alias to regular names. * libc/sys/linux/pread64.c: Rename to __libc_pread64 and weak-alias to pread64 and __pread64. * libc/sys/linux/process.c: Weak_alias __libc_getpid to __getpid. * libc/sys/linux/pwrite64.c: Rename to __libc_pwrite64 and weak-alias to pwrite64. * libc/sys/linux/sched.c: Weak-alias __libc_sched_getparam, __libc_sched_getscheduler, __libc_sched_get_priority_max, __libc_sched_get_priority_min, and __libc_sched_setschedule to name with __ instead of __libc_. * libc/sys/linux/siglongjmp.c: Include <machine/weakalias.h>. Rename siglongjmp to __libc_siglongjmp and weak-alias to siglongjmp. Call __libc_longjmp instead of longjmp, from __libc_siglongjmp. * libc/sys/linux/signal.c: Rename raise to __libc_raise and weak-alias to raise. * libc/sys/linux/socket.c: Weak-alias __libc_connect to __connect and __libc_send to __send. * libc/sys/linux/time.c: Weak-alias __libc_gettimeofday to __gettimeofday. * libc/sys/linux/wait.c: Rename wait to __libc_wait and weak-alias it to wait. Rename wait3 to __libc_wait3 and weak-alias it to wait3. * libc/sys/linux/include/setjmp.h: Use __jmp_buf in sigjmp_buf type and typedef __jmp_buf to jmp_buf. * libc/sys/linux/machine/i386/Makefile.am: Add syscalls.c and setjmp.S. * libc/sys/linux/machine/i386/Makefile.in: Regenerated. * libc/sys/linux/machine/i386/crt0.c: Add support to clear .bss section. * libc/sys/linux/machine/i386/socketcall.h: Change to use __libc_ prefix for function macros and then use weak_alias() to regular names. * libc/sys/linux/machine/i386/syscall.h: Ditto. * libc/sys/linux/sys/errno.h: Define EOPNOTSUP to be ENOTSUP. * libc/sys/linux/sys/stdio.h: Define _flockfile and _funlockfile to be flockfile() and funlockfile() respectively. * libc/sys/linux/sys/types.h * libc/reent/getreent.c: New file. * libc/sys/linux/flockfile.c: Ditto. * libc/sys/linux/funlockfile.c: Ditto. * libc/sys/linux/getreent.c: Ditto. * libc/sys/linux/pread.c: Ditto. * libc/sys/linux/pwrite.c: Ditto. * libc/sys/linux/raise.c: Ditto. * libc/sys/linux/system.c: Ditto. * libc/sys/linux/tcdrain.c: Ditto. * libc/sys/linux/machine/i386/i386mach.h: Ditto. * libc/sys/linux/machine/i386/setjmp.S: Ditto. * libc/sys/linux/machine/i386/syscalls.c: Ditto. * libc/sys/linux/machine/i386/weakalias.h: Ditto. * libc/sys/linux/machine/i386/include/setjmp.h: Ditto.
66 lines
1.4 KiB
C
66 lines
1.4 KiB
C
/*
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FUNCTION
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<<pread64>>---read a large file from specified position
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INDEX
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pread64
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ANSI_SYNOPSIS
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#include <unistd.h>
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ssize_t pread64(int <[fd]>, void *<[buf]>, size_t <[n]>, loff_t <[off]>);
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TRAD_SYNOPSIS
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#include <unistd.h>
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ssize_t pread64(<[fd]>, <[buf]>, <[n]>, <[off]>)
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int <[fd]>;
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void *<[buf]>;
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size_t <[n]>;
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loff_t <[off]>;
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DESCRIPTION
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The <<pread64>> function is similar to <<pread>>. The only difference is
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that it operates on large files and so takes a 64-bit offset. Like <<pread>>>,
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the file position is unchanged by the function (i.e. the file position
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is the same before and after a call to <<pread>>).
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RETURNS
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<<pread64>> returns the number of bytes read or <<-1>> if failure occurred.
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PORTABILITY
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<<pread64>> is an EL/IX extension.
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Supporting OS subroutine required: <<read>>, <<lseek64>>.
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*/
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#include <_ansi.h>
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#include <unistd.h>
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#include <reent.h>
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#include <machine/weakalias.h>
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ssize_t
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_DEFUN (__libc_pread64, (fd, buf, n, off),
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int fd _AND
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_PTR buf _AND
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size_t n _AND
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loff_t off)
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{
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loff_t cur_pos;
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_READ_WRITE_RETURN_TYPE num_read;
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if ((cur_pos = lseek64 (fd, 0, SEEK_CUR)) == (loff_t)-1)
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return -1;
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if (lseek64 (fd, off, SEEK_SET) == (loff_t)-1)
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return -1;
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num_read = read (fd, buf, n);
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if (lseek64 (fd, cur_pos, SEEK_SET) == (loff_t)-1)
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return -1;
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return (ssize_t)num_read;
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}
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weak_alias(__libc_pread64,pread64);
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weak_alias(__libc_pread64,__pread64);
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