mirror of https://github.com/MidnightCommander/mc
426 lines
6.3 KiB
C
426 lines
6.3 KiB
C
#include <errno.h>
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#include <sys/types.h>
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#include <unistd.h>
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#include <stdio.h>
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#include <string.h>
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#include <fcntl.h>
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#include "utilvfs.h"
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#include "vfs.h"
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#include <config.h>
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#include "local.h"
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/* Note: Some of this functions are not static. This has rather good
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* reason: exactly same functions would have to appear in sfs.c. This
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* saves both computer's memory and my work. <pavel@ucw.cz>
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* */
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static void *
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local_open (vfs *me, char *file, int flags, int mode)
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{
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int *local_info;
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int fd;
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fd = open (file, NO_LINEAR(flags), mode);
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if (fd == -1)
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return 0;
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local_info = g_new (int, 1);
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*local_info = fd;
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return local_info;
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}
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int
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local_read (void *data, char *buffer, int count)
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{
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int n;
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if (!data)
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return -1;
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while ((n = read (*((int *) data), buffer, count)) == -1){
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#ifdef EAGAIN
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if (errno == EAGAIN) continue;
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#endif
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#ifdef EINTR
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if (errno == EINTR) continue;
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#endif
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return -1;
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}
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return n;
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}
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int
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local_close (void *data)
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{
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int fd;
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if (!data)
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return -1;
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fd = *(int *) data;
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g_free (data);
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return close (fd);
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}
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int
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local_errno (vfs *me)
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{
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return errno;
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}
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static void *
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local_opendir (vfs *me, char *dirname)
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{
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DIR **local_info;
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DIR *dir;
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dir = opendir (dirname);
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if (!dir)
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return 0;
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local_info = (DIR **) g_new (DIR *, 1);
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*local_info = dir;
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return local_info;
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}
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static int
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local_telldir (void *data)
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{
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#ifdef HAVE_TELLDIR
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return telldir( *(DIR **) data );
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#else
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#warning "Native telldir() not available, emulation not implemented"
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abort();
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return 0; /* for dumb compilers */
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#endif /* !HAVE_TELLDIR */
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}
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static void
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local_seekdir (void *data, int offset)
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{
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#ifdef HAVE_SEEKDIR
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seekdir( *(DIR **) data, offset );
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#else
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#warning "Native seekdir() not available, emulation not implemented"
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abort();
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#endif /* !HAVE_SEEKDIR */
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}
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static void *
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local_readdir (void *data)
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{
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return readdir (*(DIR **) data);
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}
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static int
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local_closedir (void *data)
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{
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int i;
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i = closedir (* (DIR **) data);
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if (data)
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g_free (data);
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return i;
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}
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static int
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local_stat (vfs *me, char *path, struct stat *buf)
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{
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return stat (path, buf);
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}
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static int
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local_lstat (vfs *me, char *path, struct stat *buf)
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{
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#ifndef HAVE_STATLSTAT
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return lstat (path,buf);
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#else
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return statlstat (path, buf);
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#endif
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}
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int
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local_fstat (void *data, struct stat *buf)
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{
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return fstat (*((int *) data), buf);
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}
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static int
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local_chmod (vfs *me, char *path, int mode)
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{
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return chmod (path, mode);
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}
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static int
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local_chown (vfs *me, char *path, int owner, int group)
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{
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return chown (path, owner, group);
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}
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static int
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local_utime (vfs *me, char *path, struct utimbuf *times)
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{
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return utime (path, times);
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}
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static int
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local_readlink (vfs *me, char *path, char *buf, int size)
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{
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return readlink (path, buf, size);
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}
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static int
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local_unlink (vfs *me, char *path)
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{
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return unlink (path);
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}
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static int
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local_symlink (vfs *me, char *n1, char *n2)
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{
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return symlink (n1, n2);
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}
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static int
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local_write (void *data, char *buf, int nbyte)
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{
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int fd;
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int n;
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if (!data)
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return -1;
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fd = * (int *) data;
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while ((n = write (fd, buf, nbyte)) == -1){
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#ifdef EAGAIN
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if (errno == EAGAIN) continue;
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#endif
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#ifdef EINTR
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if (errno == EINTR) continue;
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#endif
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break;
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}
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return n;
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}
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static int
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local_rename (vfs *me, char *a, char *b)
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{
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return rename (a, b);
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}
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static int
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local_chdir (vfs *me, char *path)
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{
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return chdir (path);
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}
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int
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local_lseek (void *data, off_t offset, int whence)
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{
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int fd = * (int *) data;
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return lseek (fd, offset, whence);
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}
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static int
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local_mknod (vfs *me, char *path, int mode, int dev)
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{
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return mknod (path, mode, dev);
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}
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static int
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local_link (vfs *me, char *p1, char *p2)
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{
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return link (p1, p2);
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}
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static int
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local_mkdir (vfs *me, char *path, mode_t mode)
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{
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return mkdir (path, mode);
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}
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static int
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local_rmdir (vfs *me, char *path)
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{
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return rmdir (path);
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}
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static vfsid
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local_getid (vfs *me, char *path, struct vfs_stamping **parent)
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{
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*parent = NULL;
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return (vfsid) -1; /* We do not free local fs stuff at all */
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}
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static int
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local_nothingisopen (vfsid id)
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{
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return 0;
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}
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static void
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local_free (vfsid id)
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{
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}
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static char *
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local_getlocalcopy (vfs *me, char *path)
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{
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return g_strdup (path);
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}
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static int
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local_ungetlocalcopy (vfs *me, char *path, char *local, int has_changed)
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{
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return 0;
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}
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#ifdef HAVE_MMAP
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caddr_t
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local_mmap (vfs *me, caddr_t addr, size_t len, int prot, int flags, void *data, off_t offset)
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{
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int fd = * (int *)data;
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return mmap (addr, len, prot, flags, fd, offset);
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}
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int
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local_munmap (vfs *me, caddr_t addr, size_t len, void *data)
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{
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return munmap (addr, len);
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}
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#endif
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static int
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local_which (vfs *me, char *path)
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{
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return 0; /* Every path which other systems do not like is expected to be ours */
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}
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vfs vfs_local_ops = {
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NULL, /* This is place of next pointer */
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"localfs",
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0, /* flags */
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NULL, /* prefix */
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NULL, /* data */
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0, /* errno */
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NULL,
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NULL,
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NULL,
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local_which,
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local_open,
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local_close,
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local_read,
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local_write,
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local_opendir,
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local_readdir,
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local_closedir,
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local_telldir,
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local_seekdir,
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local_stat,
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local_lstat,
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local_fstat,
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local_chmod,
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local_chown,
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local_utime,
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local_readlink,
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local_symlink,
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local_link,
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local_unlink,
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local_rename,
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local_chdir,
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local_errno,
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local_lseek,
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local_mknod,
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local_getid,
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local_nothingisopen,
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local_free,
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local_getlocalcopy,
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local_ungetlocalcopy,
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local_mkdir,
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local_rmdir,
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NULL,
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NULL
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#ifdef HAVE_MMAP
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,local_mmap,
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local_munmap
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#endif
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};
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vfs vfs_nil_ops = {
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NULL, /* This is place of next pointer */
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"nullfs",
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0, /* flags */
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NULL, /* prefix */
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NULL, /* data */
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0, /* errno */
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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local_getid,
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local_nothingisopen,
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local_free,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL,
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NULL
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#ifdef HAVE_MMAP
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, NULL,
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NULL
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#endif
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};
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