| 0,0 → 1,104 |
|---|
| /* open.c -- open a file. |
| * |
| * Copyright (c) 1995 Cygnus Support |
| * |
| * The authors hereby grant permission to use, copy, modify, distribute, |
| * and license this software and its documentation for any purpose, provided |
| * that existing copyright notices are retained in all copies and that this |
| * notice is included verbatim in any distributions. No written agreement, |
| * license, or royalty fee is required for any of the authorized uses. |
| * Modifications to this software may be copyrighted by their authors |
| * and need not follow the licensing terms described here, provided that |
| * the new terms are clearly indicated on the first page of each file where |
| * they apply. |
| */ |
| #include <fcntl.h> |
| #include <errno.h> |
| #include <string.h> |
| #include <sys/kos_io.h> |
| #include "glue.h" |
| #include "io.h" |
| |
| #undef erro |
| extern int errno; |
| |
| int open (const char * filename, int flags, ...) |
| { |
| __io_handle *ioh; |
| fileinfo_t info; |
| int iomode, rwmode, offset; |
| int hid; |
| int err; |
| |
| hid = __io_alloc(); |
| if(hid < 0) |
| { |
| errno = EMFILE; |
| return (-1); |
| }; |
| |
| // path = getfullpath(name); |
| |
| err = get_fileinfo(filename, &info); |
| |
| if( flags & O_EXCL && |
| flags & O_CREAT ) |
| { |
| if( !err ) |
| { |
| errno = EEXIST; |
| return (-1); |
| }; |
| } |
| |
| if( err ) |
| { |
| if(flags & O_CREAT) |
| err=create_file(filename); |
| if( err ) |
| { |
| errno = EACCES; |
| return -1; |
| }; |
| }; |
| |
| if( flags & O_TRUNC ) |
| set_file_size(filename, 0); |
| |
| ioh = &__io_tab[hid]; |
| |
| rwmode = flags & ( O_RDONLY | O_WRONLY | O_RDWR ); |
| |
| iomode = 0; |
| offset = 0; |
| |
| if( rwmode == O_RDWR ) |
| iomode |= _READ | _WRITE; |
| else if( rwmode == O_RDONLY) |
| iomode |= _READ; |
| else if( rwmode == O_WRONLY) |
| iomode |= _WRITE; |
| |
| if( flags & O_APPEND ) |
| { |
| iomode |= _APPEND; |
| offset = info.size; |
| }; |
| |
| if( flags & (O_BINARY|O_TEXT) ) |
| { |
| if( flags & O_BINARY ) |
| iomode |= _BINARY; |
| } else |
| iomode |= _BINARY; |
| |
| ioh->name = strdup(filename); |
| ioh->offset = offset; |
| ioh->mode = iomode; |
| ioh->read = read_file; |
| ioh->write = write_file; |
| |
| return hid; |
| }; |
| |
| |