/*
- * $Id: ad_write.c,v 1.5 2003-01-16 20:06:33 didg Exp $
- *
* Copyright (c) 1990,1995 Regents of The University of Michigan.
* All Rights Reserved. See COPYRIGHT.
*/
#include "config.h"
#endif /* HAVE_CONFIG_H */
-#include <atalk/adouble.h>
-
+#include <stdlib.h>
#include <string.h>
#include <sys/param.h>
#include <errno.h>
-
-#ifndef MIN
-#define MIN(a,b) ((a)<(b)?(a):(b))
-#endif /* ! MIN */
+#include <atalk/adouble.h>
+#include <atalk/ea.h>
+#include <atalk/bstrlib.h>
+#include <atalk/bstradd.h>
+#include <atalk/logger.h>
+#include <atalk/util.h>
+#include <atalk/errchk.h>
/* XXX: locking has to be checked before each stream of consecutive
* ad_writes to prevent a lock in the middle from causing problems.
ssize_t cc;
#ifndef HAVE_PWRITE
- if ( ad_fd->adf_off != off ) {
+ if ( ad_fd->adf_off != offset ) {
if ( lseek( ad_fd->adf_fd, offset, SEEK_SET ) < 0 ) {
return -1;
}
}
/* 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, uint32_t eid, off_t off, int end, const char *buf, size_t buflen)
{
+ EC_INIT;
struct stat st;
ssize_t cc;
+ size_t roundup;
+ off_t r_off;
+
+ if (ad_data_fileno(ad) == -2) {
+ /* It's a symlink */
+ errno = EACCES;
+ return -1;
+ }
+
+ LOG(log_debug, logtype_default, "ad_write: off: %ju, size: %zu, eabuflen: %zu",
+ (uintmax_t)off, buflen, ad->ad_rlen);
if ( eid == ADEID_DFORK ) {
- if ( end ) {
- if ( fstat( ad->ad_df.adf_fd, &st ) < 0 ) {
- return( -1 );
- }
- off = st.st_size - off;
- }
- cc = adf_pwrite(&ad->ad_df, buf, buflen, off);
+ if ( end ) {
+ if ( fstat( ad_data_fileno(ad), &st ) < 0 ) {
+ return( -1 );
+ }
+ off = st.st_size - 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_reso_fileno(ad), &st ) < 0)
+ return(-1);
+ off = st.st_size - off - ad_getentryoff(ad, eid);
+ }
+#ifdef HAVE_EAFD
+ if (ad->ad_vers == AD_VERSION_EA) {
+ r_off = 0;
+ } else
+#endif
+ r_off = ad_getentryoff(ad, eid) + off;
- if ( end ) {
- if ( fstat( ad->ad_df.adf_fd, &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)) {
- memcpy(ad->ad_data + r_off, buf, MIN(sizeof(ad->ad_data) -r_off, cc));
- }
- if ( ad->ad_rlen < r_off + cc ) {
- ad->ad_rlen = r_off + cc;
- }
- }
- else {
+ if ( ad->ad_rlen < off + cc )
+ ad->ad_rlen = off + cc;
+ } else {
return -1; /* we don't know how to write if it's not a ressource or data fork */
}
+
+EC_CLEANUP:
+ if (ret != 0)
+ return ret;
return( cc );
}
/*
* 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,
- size + ad->ad_eid[ ADEID_RFORK ].ade_off ) < 0 ) {
- return( -1 );
+
+#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 (ad->ad_vers != AD_VERSION_EA)
+ if (sys_ftruncate(ad_reso_fileno(ad), size + ad->ad_eid[ ADEID_RFORK ].ade_off ) < 0 )
+ 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) {
- return -1;
- }
+ if (sys_ftruncate(ad_data_fileno(ad), size) < 0)
+ return -1;
+
return 0;
}
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