/*
- * $Id: ad_write.c,v 1.7 2003-02-09 15:36:13 didg Exp $
+ * $Id: ad_write.c,v 1.11 2010-03-30 12:55:26 franklahm Exp $
*
* Copyright (c) 1990,1995 Regents of The University of Michigan.
* All Rights Reserved. See COPYRIGHT.
}
/* end is always 0 */
-ssize_t ad_write( ad, eid, off, end, buf, buflen )
- struct adouble *ad;
- const u_int32_t eid;
- off_t off;
- const int end;
- const char *buf;
- const size_t buflen;
+ssize_t ad_write(struct adouble *ad, const u_int32_t eid, off_t off, const int end, const char *buf, const size_t buflen)
{
struct stat st;
ssize_t cc;
+
+ if (ad_data_fileno(ad) == -2) {
+ /* It's a symlink */
+ errno = EACCES;
+ return -1;
+ }
if ( eid == ADEID_DFORK ) {
if ( end ) {
- if ( fstat( ad->ad_df.adf_fd, &st ) < 0 ) {
+ if ( fstat( ad_data_fileno(ad), &st ) < 0 ) {
return( -1 );
}
off = st.st_size - off;
}
- cc = adf_pwrite(&ad->ad_df, buf, buflen, off);
+ cc = adf_pwrite(&ad->ad_data_fork, buf, buflen, off);
} else if ( eid == ADEID_RFORK ) {
off_t r_off;
if ( end ) {
- if ( fstat( ad->ad_df.adf_fd, &st ) < 0 ) {
+ if ( fstat( ad_data_fileno(ad), &st ) < 0 ) {
return( -1 );
}
off = st.st_size - off -ad_getentryoff(ad, eid);
}
r_off = ad_getentryoff(ad, eid) + off;
- cc = adf_pwrite(&ad->ad_hf, buf, buflen, r_off);
+ cc = adf_pwrite(&ad->ad_resource_fork, buf, buflen, r_off);
/* sync up our internal buffer FIXME always false? */
if (r_off < ad_getentryoff(ad, ADEID_RFORK)) {
/*
* the caller set the locks
- * we need tocopy and paste from samba code source/smbd/vfs_wrap.c
* ftruncate is undefined when the file length is smaller than 'size'
*/
-int ad_rtruncate( ad, size )
- struct adouble *ad;
- const off_t size;
+int sys_ftruncate(int fd, off_t length)
{
- if ( ftruncate( ad->ad_hf.adf_fd,
+
+#ifndef HAVE_PWRITE
+off_t curpos;
+#endif
+int err;
+struct stat st;
+char c = 0;
+
+ if (!ftruncate(fd, length)) {
+ return 0;
+ }
+ /* maybe ftruncate doesn't work if we try to extend the size */
+ err = errno;
+
+#ifndef HAVE_PWRITE
+ /* we only care about file pointer if we don't use pwrite */
+ if ((off_t)-1 == (curpos = lseek(fd, 0, SEEK_CUR)) ) {
+ errno = err;
+ return -1;
+ }
+#endif
+
+ if ( fstat( fd, &st ) < 0 ) {
+ errno = err;
+ return -1;
+ }
+
+ if (st.st_size > length) {
+ errno = err;
+ return -1;
+ }
+
+ if (lseek(fd, length -1, SEEK_SET) != length -1) {
+ errno = err;
+ return -1;
+ }
+
+ if (1 != write( fd, &c, 1 )) {
+ /* return the write errno */
+ return -1;
+ }
+
+#ifndef HAVE_PWRITE
+ if (curpos != lseek(fd, curpos, SEEK_SET)) {
+ errno = err;
+ return -1;
+ }
+#endif
+
+ return 0;
+}
+
+/* ------------------------ */
+int ad_rtruncate( struct adouble *ad, const off_t size)
+{
+ if ( sys_ftruncate( ad_reso_fileno(ad),
size + ad->ad_eid[ ADEID_RFORK ].ade_off ) < 0 ) {
- return( -1 );
+ return -1;
}
ad->ad_rlen = size;
- return( 0 );
+ return 0;
}
-int ad_dtruncate(ad, size)
- struct adouble *ad;
- const off_t size;
+int ad_dtruncate(struct adouble *ad, const off_t size)
{
- if (ftruncate(ad->ad_df.adf_fd, size) < 0) {
+ if (sys_ftruncate(ad_data_fileno(ad), size) < 0) {
return -1;
}
return 0;