/*
- $Id: ea.c,v 1.17 2009-12-04 10:26:10 franklahm Exp $
+ $Id: ea.c,v 1.22 2010-04-18 11:11:17 franklahm Exp $
Copyright (c) 2009 Frank Lahm <franklahm@gmail.com>
This program is free software; you can redistribute it and/or modify
return 0;
}
-/*
- * Function: ea_path
- *
- * Purpose: return name of ea header filename
- *
- * Arguments:
- *
- * ea (r) ea handle
- * eaname (r) name of EA or NULL
- *
- * Returns: pointer to name in static buffer, NULL on error
- *
- * Effects:
- *
- * Calls ad_open, copies buffer, appends "::EA" and if supplied append eanme
- * Files: "file" -> "file/.AppleDouble/file::EA"
- * Dirs: "dir" -> "dir/.AppleDouble/.Parent::EA"
- * "file" with EA "myEA" -> "file/.AppleDouble/file::EA:myEA"
- */
-static char * ea_path(const struct ea * restrict ea,
- const char * restrict eaname)
-{
- char *adname;
- static char pathbuf[MAXPATHLEN + 1];
-
- /* get name of a adouble file from uname */
- adname = ea->vol->ad_path(ea->filename, (ea->ea_flags & EA_DIR) ? ADFLAGS_DIR : 0);
- /* copy it so we can work with it */
- strlcpy(pathbuf, adname, MAXPATHLEN + 1);
- /* append "::EA" */
- strlcat(pathbuf, "::EA", MAXPATHLEN + 1);
-
- if (eaname) {
- strlcat(pathbuf, "::", MAXPATHLEN + 1);
- if ((eaname = mtoupath(ea->vol, eaname)) == NULL)
- return NULL;
- strlcat(pathbuf, eaname, MAXPATHLEN + 1);
- }
-
- return pathbuf;
-}
-
/*
* Function: ea_addentry
*
size_t attrsize,
int bitmap)
{
+ int ea_existed = 0;
unsigned int count = 0;
void *tmprealloc;
if (ea->ea_count > 0) {
while (count < ea->ea_count) {
if (strcmp(attruname, (*ea->ea_entries)[count].ea_name) == 0) {
- LOG(log_debug, logtype_afpd, "ea_addentry('%s'): exists", attruname);
+ ea_existed = 1;
+ LOG(log_debug, logtype_afpd, "ea_addentry('%s', bitmap:0x%x): exists", attruname, bitmap);
if (bitmap & kXAttrCreate)
/* its like O_CREAT|O_EXCL -> fail */
return -1;
- if ( ! (bitmap & kXAttrReplace))
- /* replace was not requested, then its an error */
- return -1;
- break;
+ (*(ea->ea_entries))[count].ea_size = attrsize;
+ return 0;
}
count++;
}
}
+ if ((bitmap & kXAttrReplace) && ! ea_existed)
+ /* replace was requested, but EA didn't exist */
+ return -1;
+
if (ea->ea_count == 0) {
ea->ea_entries = malloc(sizeof(struct ea_entry));
if ( ! ea->ea_entries) {
LOG(log_error, logtype_afpd, "ea_addentry: OOM");
return -1;
}
- } else {
+ } else if (! ea_existed) {
tmprealloc = realloc(ea->ea_entries, sizeof(struct ea_entry) * (ea->ea_count + 1));
if ( ! tmprealloc) {
LOG(log_error, logtype_afpd, "ea_addentry: OOM");
return -1;
}
-/*
- * Function: ea_delentry
- *
- * Purpose: delete one EA from ea->ea_entries[]
- *
- * Arguments:
- *
- * ea (rw) pointer to struct ea
- * attruname (r) EA name
- *
- * Returns: new number of EA entries, -1 on error
- *
- * Effects:
- *
- * Remove entry from ea->ea_entries[]. Decrement ea->ea_count.
- * Marks it as unused just by freeing name and setting it to NULL.
- * ea_close and pack_buffer must honor this.
- */
-static int ea_delentry(struct ea * restrict ea,
- const char * restrict attruname)
-{
- int ret = 0;
- unsigned int count = 0;
-
- if (ea->ea_count == 0) {
- LOG(log_error, logtype_afpd, "ea_delentry('%s'): illegal ea_count of 0 on deletion");
- return -1;
- }
-
- while (count < ea->ea_count) {
- /* search matching EA */
- if (strcmp(attruname, (*ea->ea_entries)[count].ea_name) == 0) {
- free((*ea->ea_entries)[count].ea_name);
- (*ea->ea_entries)[count].ea_name = NULL;
-
- LOG(log_debug, logtype_afpd, "ea_delentry('%s'): deleted no %u/%u",
- attruname, count + 1, ea->ea_count);
-
- break;
- }
- count++;
- }
-
- return ret;
-}
-
/*
* Function: create_ea_header
*
struct stat st;
char *eaname;
- if ((eaname = ea_path(ea, attruname)) == NULL) {
+ if ((eaname = ea_path(ea, attruname, 1)) == NULL) {
LOG(log_error, logtype_afpd, "write_ea('%s'): ea_path error", attruname);
return AFPERR_MISC;
}
return ret;
}
+/*
+ * Function: ea_delentry
+ *
+ * Purpose: delete one EA from ea->ea_entries[]
+ *
+ * Arguments:
+ *
+ * ea (rw) pointer to struct ea
+ * attruname (r) EA name
+ *
+ * Returns: new number of EA entries, -1 on error
+ *
+ * Effects:
+ *
+ * Remove entry from ea->ea_entries[]. Decrement ea->ea_count.
+ * Marks it as unused just by freeing name and setting it to NULL.
+ * ea_close and pack_buffer must honor this.
+ */
+static int ea_delentry(struct ea * restrict ea, const char * restrict attruname)
+{
+ int ret = 0;
+ unsigned int count = 0;
+
+ if (ea->ea_count == 0) {
+ LOG(log_error, logtype_afpd, "ea_delentry('%s'): illegal ea_count of 0 on deletion");
+ return -1;
+ }
+
+ while (count < ea->ea_count) {
+ /* search matching EA */
+ if (strcmp(attruname, (*ea->ea_entries)[count].ea_name) == 0) {
+ free((*ea->ea_entries)[count].ea_name);
+ (*ea->ea_entries)[count].ea_name = NULL;
+
+ LOG(log_debug, logtype_afpd, "ea_delentry('%s'): deleted no %u/%u",
+ attruname, count + 1, ea->ea_count);
+
+ break;
+ }
+ count++;
+ }
+
+ return ret;
+}
+
/*
* Function: delete_ea_file
*
*
* Returns: 0 on success, -1 on error
*/
-static int delete_ea_file(const struct ea * restrict ea,
- const char *eaname)
+static int delete_ea_file(const struct ea * restrict ea, const char *eaname)
{
int ret = 0;
char *eafile;
struct stat st;
- if ((eafile = ea_path(ea, eaname)) == NULL) {
+ if ((eafile = ea_path(ea, eaname, 1)) == NULL) {
LOG(log_error, logtype_afpd, "delete_ea_file('%s'): ea_path error", eaname);
return -1;
}
return ret;
}
+/*************************************************************************************
+ * ea_path, ea_open and ea_close are only global so that dbd can call them
+ *************************************************************************************/
+
+/*
+ * Function: ea_path
+ *
+ * Purpose: return name of ea header filename
+ *
+ * Arguments:
+ *
+ * ea (r) ea handle
+ * eaname (r) name of EA or NULL
+ * macname (r) if != 0 call mtoupath on eaname
+ *
+ * Returns: pointer to name in static buffer, NULL on error
+ *
+ * Effects:
+ *
+ * Calls ad_open, copies buffer, appends "::EA" and if supplied append eanme
+ * Files: "file" -> "file/.AppleDouble/file::EA"
+ * Dirs: "dir" -> "dir/.AppleDouble/.Parent::EA"
+ * "file" with EA "myEA" -> "file/.AppleDouble/file::EA:myEA"
+ */
+char *ea_path(const struct ea * restrict ea, const char * restrict eaname, int macname)
+{
+ char *adname;
+ static char pathbuf[MAXPATHLEN + 1];
+
+ /* get name of a adouble file from uname */
+ adname = ea->vol->ad_path(ea->filename, (ea->ea_flags & EA_DIR) ? ADFLAGS_DIR : 0);
+ /* copy it so we can work with it */
+ strlcpy(pathbuf, adname, MAXPATHLEN + 1);
+ /* append "::EA" */
+ strlcat(pathbuf, "::EA", MAXPATHLEN + 1);
+
+ if (eaname) {
+ strlcat(pathbuf, "::", MAXPATHLEN + 1);
+ if (macname)
+ if ((eaname = mtoupath(ea->vol, eaname)) == NULL)
+ return NULL;
+ strlcat(pathbuf, eaname, MAXPATHLEN + 1);
+ }
+
+ return pathbuf;
+}
+
/*
* Function: ea_open
*
* Eiterh EA_RDONLY or EA_RDWR MUST be requested
* ea (w) pointer to a struct ea that we fill
*
- * Returns: 0 on success, -1 on error
+ * Returns: 0 on success
+ * -1 on misc error with errno = EFAULT
+ * -2 if no EA header exists with errno = ENOENT
*
* Effects:
*
* file is either read or write locked depending on the open flags.
* When you're done with struct ea you must call ea_close on it.
*/
-static int ea_open(const struct vol * restrict vol,
- const char * restrict uname,
- eaflags_t eaflags,
- struct ea * restrict ea)
+int ea_open(const struct vol * restrict vol,
+ const char * restrict uname,
+ eaflags_t eaflags,
+ struct ea * restrict ea)
{
int ret = 0;
char *eaname;
ea->vol = vol; /* ea_close needs it */
ea->ea_flags = eaflags;
+ ea->dirfd = -1; /* no *at (cf openat) semantics by default */
+
/* Dont care for errors, eg when removing the file is already gone */
if (!stat(uname, &st) && S_ISDIR(st.st_mode))
ea->ea_flags |= EA_DIR;
return -1;
}
- eaname = ea_path(ea, NULL);
+ eaname = ea_path(ea, NULL, 0);
LOG(log_maxdebug, logtype_afpd, "ea_open: ea_path: %s", eaname);
/* Check if it exists, if not create it if EA_CREATE is in eaflags */
if ( ! (eaflags & EA_CREATE)) {
/* creation was not requested, so return with error */
- ret = -1;
+ ret = -2;
goto exit;
}
/* header file exists, so read and parse it */
/* malloc buffer where we read disk file into */
+ if (st.st_size < EA_HEADER_SIZE) {
+ LOG(log_error, logtype_afpd, "ea_open('%s'): bogus EA header file", eaname);
+ ret = -1;
+ goto exit;
+ }
ea->ea_size = st.st_size;
ea->ea_data = malloc(st.st_size);
if (! ea->ea_data) {
}
exit:
- if (ret == 0) {
+ switch (ret) {
+ case 0:
ea->ea_inited = EA_INITED;
- } else {
+ break;
+ case -1:
+ errno = EFAULT; /* force some errno distinguishable from ENOENT */
+ /* fall through */
+ case -2:
if (ea->ea_data) {
free(ea->ea_data);
ea->ea_data = NULL;
close(ea->ea_fd);
ea->ea_fd = -1;
}
+ break;
}
return ret;
}
+/*
+ * Function: ea_openat
+ *
+ * Purpose: openat like wrapper for ea_open, takes a additional file descriptor
+ *
+ * Arguments:
+ *
+ * vol (r) current volume
+ * sfd (r) openat like file descriptor
+ * uname (r) filename for which we have to open a header
+ * flags (r) EA_CREATE: create if it doesn't exist (without it won't be created)
+ * EA_RDONLY: open read only
+ * EA_RDWR: open read/write
+ * Eiterh EA_RDONLY or EA_RDWR MUST be requested
+ * ea (w) pointer to a struct ea that we fill
+ *
+ * Returns: 0 on success
+ * -1 on misc error with errno = EFAULT
+ * -2 if no EA header exists with errno = ENOENT
+ *
+ * Effects:
+ *
+ * opens header file and stores fd in ea->ea_fd. Size of file is put into ea->ea_size.
+ * number of EAs is stored in ea->ea_count. flags are remembered in ea->ea_flags.
+ * file is either read or write locked depending on the open flags.
+ * When you're done with struct ea you must call ea_close on it.
+ */
+int ea_openat(const struct vol * restrict vol,
+ int dirfd,
+ const char * restrict uname,
+ eaflags_t eaflags,
+ struct ea * restrict ea)
+{
+ int ret = 0;
+ int cwdfd = -1;
+
+ if (dirfd != -1) {
+ if (((cwdfd = open(".", O_RDONLY)) == -1) || (fchdir(dirfd) != 0)) {
+ ret = -1;
+ goto exit;
+ }
+ }
+
+ ret = ea_open(vol, uname, eaflags, ea);
+ ea->dirfd = dirfd;
+
+ if (dirfd != -1) {
+ if (fchdir(cwdfd) != 0) {
+ LOG(log_error, logtype_afpd, "ea_openat: cant chdir back, exiting");
+ exit(EXITERR_SYS);
+ }
+ }
+
+
+exit:
+ if (cwdfd != -1)
+ close(cwdfd);
+
+ return ret;
+
+}
+
/*
* Function: ea_close
*
* Flushes and then closes and frees all resouces held by ea handle.
* Pack data in ea into ea_data, then write ea_data to disk
*/
-static int ea_close(struct ea * restrict ea)
+int ea_close(struct ea * restrict ea)
{
int ret = 0;
unsigned int count = 0;
} else {
if (ea->ea_count == 0) {
/* Check if EA header exists and remove it */
- eaname = ea_path(ea, NULL);
- if ((stat(eaname, &st)) == 0) {
- if ((unlink(eaname)) != 0) {
+ eaname = ea_path(ea, NULL, 0);
+ if ((lstatat(ea->dirfd, eaname, &st)) == 0) {
+ if ((netatalk_unlinkat(ea->dirfd, eaname)) != 0) {
LOG(log_error, logtype_afpd, "ea_close('%s'): unlink: %s",
eaname, strerror(errno));
ret = -1;
while (count < ea.ea_count) {
if (strcmp(attruname, (*ea.ea_entries)[count].ea_name) == 0) {
- if ( (eafile = ea_path(&ea, attruname)) == NULL) {
+ if ( (eafile = ea_path(&ea, attruname, 1)) == NULL) {
ret = AFPERR_MISC;
break;
}
if ((fd = open(eafile, O_RDONLY)) == -1) {
+ LOG(log_error, logtype_afpd, "get_eacontent('%s'): open error: %s", uname, strerror(errno));
ret = AFPERR_MISC;
break;
}
{
unsigned int count = 0;
int ret = AFP_OK;
+ int cwd = -1;
struct ea ea;
LOG(log_debug, logtype_afpd, "ea_deletefile('%s')", file);
/* Open EA stuff */
- if ((ea_open(vol, file, EA_RDWR, &ea)) != 0) {
+ if ((ea_openat(vol, dirfd, file, EA_RDWR, &ea)) != 0) {
if (errno == ENOENT)
/* no EA files, nothing to do */
return AFP_OK;
}
}
+ if (dirfd != -1) {
+ if (((cwd = open(".", O_RDONLY)) == -1) || (fchdir(dirfd) != 0)) {
+ ret = AFPERR_MISC;
+ goto exit;
+ }
+ }
+
while (count < ea.ea_count) {
if ((delete_ea_file(&ea, (*ea.ea_entries)[count].ea_name)) != 0) {
ret = AFPERR_MISC;
/* ea_close removes the EA header file for us because all names are NULL */
if ((ea_close(&ea)) != 0) {
LOG(log_error, logtype_afpd, "ea_deletefile('%s'): error closing ea handle", file);
- return AFPERR_MISC;
+ ret = AFPERR_MISC;
}
+ if (dirfd != -1 && fchdir(cwd) != 0) {
+ LOG(log_error, logtype_afpd, "ea_deletefile: cant chdir back. exit!");
+ exit(EXITERR_SYS);
+ }
+
+exit:
+ if (cwd != -1)
+ close(cwd);
+
return ret;
}
/* Open EA stuff */
- if ((ea_open(vol, src, EA_RDWR, &srcea)) != 0) {
+ if ((ea_openat(vol, dirfd, src, EA_RDWR, &srcea)) != 0) {
if (errno == ENOENT)
/* no EA files, nothing to do */
return AFP_OK;
easize = (*srcea.ea_entries)[count].ea_size;
/* Build src and dst paths for rename() */
- if ((eapath = ea_path(&srcea, eaname)) == NULL) {
+ if ((eapath = ea_path(&srcea, eaname, 1)) == NULL) {
ret = AFPERR_MISC;
goto exit;
}
strcpy(srceapath, eapath);
- if ((eapath = ea_path(&dstea, eaname)) == NULL) {
+ if ((eapath = ea_path(&dstea, eaname, 1)) == NULL) {
ret = AFPERR_MISC;
goto exit;
}
}
/* Now rename the EA */
- if ((rename( srceapath, eapath)) < 0) {
+ if ((unix_rename(dirfd, srceapath, -1, eapath)) < 0) {
LOG(log_error, logtype_afpd, "ea_renamefile('%s/%s'): moving EA '%s' to '%s'",
src, dst, srceapath, eapath);
ret = AFPERR_MISC;
LOG(log_debug, logtype_afpd, "ea_copyfile('%s'/'%s')", src, dst);
/* Open EA stuff */
- if ((ea_open(vol, src, EA_RDWR, &srcea)) != 0) {
+ if ((ea_openat(vol, sfd, src, EA_RDWR, &srcea)) != 0) {
if (errno == ENOENT)
/* no EA files, nothing to do */
return AFP_OK;
easize = (*srcea.ea_entries)[count].ea_size;
/* Build src and dst paths for copy_file() */
- if ((eapath = ea_path(&srcea, eaname)) == NULL) {
+ if ((eapath = ea_path(&srcea, eaname, 1)) == NULL) {
ret = AFPERR_MISC;
goto exit;
}
strcpy(srceapath, eapath);
- if ((eapath = ea_path(&dstea, eaname)) == NULL) {
+ if ((eapath = ea_path(&dstea, eaname, 1)) == NULL) {
ret = AFPERR_MISC;
goto exit;
}
}
/* Now copy the EA */
- if ((copy_file( srceapath, eapath, (0666 & ~vol->v_umask))) < 0) {
+ if ((copy_file(sfd, srceapath, eapath, (0666 & ~vol->v_umask))) < 0) {
LOG(log_error, logtype_afpd, "ea_copyfile('%s/%s'): copying EA '%s' to '%s'",
src, dst, srceapath, eapath);
ret = AFPERR_MISC;
}
}
- if ((chown(ea_path(&ea, NULL), uid, gid)) != 0) {
+ if ((lchown(ea_path(&ea, NULL, 0), uid, gid)) != 0) {
switch (errno) {
case EPERM:
case EACCES:
}
while (count < ea.ea_count) {
- if ((eaname = ea_path(&ea, (*ea.ea_entries)[count].ea_name)) == NULL) {
+ if ((eaname = ea_path(&ea, (*ea.ea_entries)[count].ea_name, 1)) == NULL) {
ret = AFPERR_MISC;
goto exit;
}
- if ((chown(eaname, uid, gid)) != 0) {
+ if ((lchown(eaname, uid, gid)) != 0) {
switch (errno) {
case EPERM:
case EACCES:
}
/* Set mode on EA header file */
- if ((setfilmode(ea_path(&ea, NULL), ea_header_mode(mode), NULL, vol->v_umask)) != 0) {
- LOG(log_error, logtype_afpd, "ea_chmod_file('%s'): %s", ea_path(&ea, NULL), strerror(errno));
+ if ((setfilmode(ea_path(&ea, NULL, 0), ea_header_mode(mode), NULL, vol->v_umask)) != 0) {
+ LOG(log_error, logtype_afpd, "ea_chmod_file('%s'): %s", ea_path(&ea, NULL, 0), strerror(errno));
switch (errno) {
case EPERM:
case EACCES:
/* Set mode on EA files */
while (count < ea.ea_count) {
- if ((eaname = ea_path(&ea, (*ea.ea_entries)[count].ea_name)) == NULL) {
+ if ((eaname = ea_path(&ea, (*ea.ea_entries)[count].ea_name, 1)) == NULL) {
ret = AFPERR_MISC;
goto exit;
}
}
/* Set mode on EA header */
- if ((setfilmode(ea_path(&ea, NULL), ea_header_mode(mode), NULL, vol->v_umask)) != 0) {
- LOG(log_error, logtype_afpd, "ea_chmod_dir('%s'): %s", ea_path(&ea, NULL), strerror(errno));
+ if ((setfilmode(ea_path(&ea, NULL, 0), ea_header_mode(mode), NULL, vol->v_umask)) != 0) {
+ LOG(log_error, logtype_afpd, "ea_chmod_dir('%s'): %s", ea_path(&ea, NULL, 0), strerror(errno));
switch (errno) {
case EPERM:
case EACCES:
LOG(log_warning, logtype_afpd, "ea_chmod_dir('%s'): contains a slash", eaname);
eaname = eaname_safe;
}
- if ((eaname = ea_path(&ea, eaname)) == NULL) {
+ if ((eaname = ea_path(&ea, eaname, 1)) == NULL) {
ret = AFPERR_MISC;
goto exit;
}
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