/*
- * $Id: ad_write.c,v 1.9 2006-09-29 09:39:16 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.
}
/* 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;
+ off_t r_off;
+
+ if (ad_data_fileno(ad) == AD_SYMLINK) {
+ errno = EACCES;
+ return -1;
+ }
+
+ LOG(log_debug, logtype_ad, "ad_write: off: %ju, size: %zu, eabuflen: %zu",
+ (uintmax_t)off, buflen, ad->ad_rlen);
if ( eid == ADEID_DFORK ) {
- 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);
+ 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_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_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 (end) {
+ if (fstat( ad_reso_fileno(ad), &st ) < 0)
+ return(-1);
+ off = st.st_size - off - ad_getentryoff(ad, eid);
}
- if ( ad->ad_rlen < r_off + cc ) {
- ad->ad_rlen = r_off + cc;
+ if (ad->ad_vers == AD_VERSION_EA) {
+#ifdef HAVE_EAFD
+ r_off = off;
+#else
+ r_off = ADEDOFF_RFORK_OSX + off;
+#endif
+ } else {
+ r_off = ad_getentryoff(ad, eid) + off;
}
- }
- else {
+ cc = adf_pwrite(&ad->ad_resource_fork, buf, buflen, r_off);
+
+ 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 */
}
+
+ if (ret != 0)
+ return ret;
return( cc );
}
}
/* ------------------------ */
-int ad_rtruncate( ad, size )
- struct adouble *ad;
- const off_t size;
+int ad_rtruncate(struct adouble *ad, const char *uname, const off_t size)
+{
+ EC_INIT;
+
+ /*
+ * We can't delete 0 byte size resource forks either, because a
+ * fork may reference the adouble handle with an open fd for the
+ * file, which means we would only delete the directory entry, not
+ * the file. Subsequently all code that works with fork handles
+ * finds the fork open, so eg flushing a fork (ad_flush()) will
+ * recreate ._ files. The correct place to delete 0 byte sized
+ * resource forks is in of_closefork().
+ */
+
+ EC_NEG1( sys_ftruncate(ad_reso_fileno(ad), size + ad->ad_eid[ ADEID_RFORK ].ade_off) );
+
+ ad->ad_rlen = size;
+
+EC_CLEANUP:
+ if (ret != 0)
+ LOG(log_error, logtype_ad, "ad_rtruncate(\"%s\"): %s",
+ fullpathname(uname), strerror(errno));
+ EC_EXIT;
+}
+
+int ad_dtruncate(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;
+ if (sys_ftruncate(ad_data_fileno(ad), size) < 0) {
+ LOG(log_error, logtype_ad, "sys_ftruncate(fd: %d): %s",
+ ad_data_fileno(ad), strerror(errno));
+ return -1;
}
- ad->ad_rlen = size;
return 0;
}
-int ad_dtruncate(ad, size)
- struct adouble *ad;
- const off_t size;
+/* ----------------------- */
+static int copy_all(const int dfd, const void *buf,
+ size_t buflen)
{
- if (sys_ftruncate(ad_data_fileno(ad), size) < 0) {
- return -1;
+ ssize_t cc;
+
+ while (buflen > 0) {
+ if ((cc = write(dfd, buf, buflen)) < 0) {
+ switch (errno) {
+ case EINTR:
+ continue;
+ default:
+ return -1;
+ }
+ }
+ buflen -= cc;
}
+
return 0;
}
+
+/* --------------------------
+ * copy only the fork data stream
+*/
+int copy_fork(int eid, struct adouble *add, struct adouble *ads)
+{
+ ssize_t cc;
+ int err = 0;
+ char filebuf[8192];
+ int sfd, dfd;
+
+ if (eid == ADEID_DFORK) {
+ sfd = ad_data_fileno(ads);
+ dfd = ad_data_fileno(add);
+ }
+ else {
+ sfd = ad_reso_fileno(ads);
+ dfd = ad_reso_fileno(add);
+ }
+
+ if ((off_t)-1 == lseek(sfd, ad_getentryoff(ads, eid), SEEK_SET))
+ return -1;
+
+ if ((off_t)-1 == lseek(dfd, ad_getentryoff(add, eid), SEEK_SET))
+ return -1;
+
+#if 0 /* ifdef SENDFILE_FLAVOR_LINUX */
+ /* doesn't work With 2.6 FIXME, only check for EBADFD ? */
+ off_t offset = 0;
+ size_t size;
+ struct stat st;
+ #define BUF 128*1024*1024
+
+ if (fstat(sfd, &st) == 0) {
+
+ while (1) {
+ if ( offset >= st.st_size) {
+ return 0;
+ }
+ size = (st.st_size -offset > BUF)?BUF:st.st_size -offset;
+ if ((cc = sys_sendfile(dfd, sfd, &offset, size)) < 0) {
+ switch (errno) {
+ case ENOSYS:
+ case EINVAL: /* there's no guarantee that all fs support sendfile */
+ goto no_sendfile;
+ default:
+ return -1;
+ }
+ }
+ }
+ }
+ no_sendfile:
+ lseek(sfd, offset, SEEK_SET);
+#endif
+
+ while (1) {
+ if ((cc = read(sfd, filebuf, sizeof(filebuf))) < 0) {
+ if (errno == EINTR)
+ continue;
+ err = -1;
+ break;
+ }
+
+ if (!cc || ((err = copy_all(dfd, filebuf, cc)) < 0)) {
+ break;
+ }
+ }
+ return err;
+}
projects / netatalk.git / blobdiff