diff options
Diffstat (limited to 'source3/lib/system.c')
| -rw-r--r-- | source3/lib/system.c | 86 |
1 files changed, 83 insertions, 3 deletions
diff --git a/source3/lib/system.c b/source3/lib/system.c index caad95840c..c59fe5c34d 100644 --- a/source3/lib/system.c +++ b/source3/lib/system.c @@ -1367,7 +1367,7 @@ int sys_dup2(int oldfd, int newfd) /************************************************************************** Wrappers for extented attribute calls. Based on the Linux package with - support for IRIX also. Expand as other systems have them. + support for IRIX and (Net|Free)BSD also. Expand as other systems have them. ****************************************************************************/ ssize_t sys_getxattr (const char *path, const char *name, void *value, size_t size) @@ -1376,9 +1376,21 @@ ssize_t sys_getxattr (const char *path, const char *name, void *value, size_t si return getxattr(path, name, value, size); #elif defined(HAVE_EXTATTR_GET_FILE) char *s; + ssize_t retval; int attrnamespace = (strncmp(name, "system", 6) == 0) ? EXTATTR_NAMESPACE_SYSTEM : EXTATTR_NAMESPACE_USER; const char *attrname = ((s=strchr_m(name, '.')) == NULL) ? name : s + 1; + /* + * The BSD implementation has a nasty habit of silently truncating + * the returned value to the size of the buffer, so we have to check + * that the buffer is large enough to fit the returned value. + */ + retval = extattr_get_file(path, attrnamespace, attrname, NULL, 0); + + if(retval > size) { + errno = ERANGE; + return -1; + } return extattr_get_file(path, attrnamespace, attrname, value, size); #elif defined(HAVE_ATTR_GET) @@ -1403,10 +1415,18 @@ ssize_t sys_lgetxattr (const char *path, const char *name, void *value, size_t s return lgetxattr(path, name, value, size); #elif defined(HAVE_EXTATTR_GET_LINK) char *s; + ssize_t retval; int attrnamespace = (strncmp(name, "system", 6) == 0) ? EXTATTR_NAMESPACE_SYSTEM : EXTATTR_NAMESPACE_USER; const char *attrname = ((s=strchr_m(name, '.')) == NULL) ? name : s + 1; + retval = extattr_get_link(path, attrnamespace, attrname, NULL, 0); + + if(retval > size) { + errno = ERANGE; + return -1; + } + return extattr_get_link(path, attrnamespace, attrname, value, size); #elif defined(HAVE_ATTR_GET) int retval, flags = ATTR_DONTFOLLOW; @@ -1430,10 +1450,18 @@ ssize_t sys_fgetxattr (int filedes, const char *name, void *value, size_t size) return fgetxattr(filedes, name, value, size); #elif defined(HAVE_EXTATTR_GET_FD) char *s; + ssize_t retval; int attrnamespace = (strncmp(name, "system", 6) == 0) ? EXTATTR_NAMESPACE_SYSTEM : EXTATTR_NAMESPACE_USER; const char *attrname = ((s=strchr_m(name, '.')) == NULL) ? name : s + 1; + retval = extattr_get_fd(filedes, attrnamespace, attrname, NULL, 0); + + if(retval > size) { + errno = ERANGE; + return -1; + } + return extattr_get_fd(filedes, attrnamespace, attrname, value, size); #elif defined(HAVE_ATTR_GETF) int retval, flags = 0; @@ -1747,7 +1775,24 @@ int sys_setxattr (const char *path, const char *name, const void *value, size_t int attrnamespace = (strncmp(name, "system", 6) == 0) ? EXTATTR_NAMESPACE_SYSTEM : EXTATTR_NAMESPACE_USER; const char *attrname = ((s=strchr_m(name, '.')) == NULL) ? name : s + 1; - + if (flags) { + /* Check attribute existence */ + retval = extattr_get_file(path, attrnamespace, attrname, NULL, 0); + if (retval < 0) { + /* REPLACE attribute, that doesn't exist */ + if (flags & XATTR_REPLACE && errno == ENOATTR) { + errno = ENOATTR; + return -1; + } + } + else { + /* CREATE attribute, that already exists */ + if (flags & XATTR_CREATE) { + errno = EEXIST; + return -1; + } + } + } retval = extattr_set_file(path, attrnamespace, attrname, value, size); return (retval < 0) ? -1 : 0; #elif defined(HAVE_ATTR_SET) @@ -1775,6 +1820,24 @@ int sys_lsetxattr (const char *path, const char *name, const void *value, size_t int attrnamespace = (strncmp(name, "system", 6) == 0) ? EXTATTR_NAMESPACE_SYSTEM : EXTATTR_NAMESPACE_USER; const char *attrname = ((s=strchr_m(name, '.')) == NULL) ? name : s + 1; + if (flags) { + /* Check attribute existence */ + retval = extattr_get_link(path, attrnamespace, attrname, NULL, 0); + if (retval < 0) { + /* REPLACE attribute, that doesn't exist */ + if (flags & XATTR_REPLACE && errno == ENOATTR) { + errno = ENOATTR; + return -1; + } + } + else { + /* CREATE attribute, that already exists */ + if (flags & XATTR_CREATE) { + errno = EEXIST; + return -1; + } + } + } retval = extattr_set_link(path, attrnamespace, attrname, value, size); return (retval < 0) ? -1 : 0; @@ -1803,7 +1866,24 @@ int sys_fsetxattr (int filedes, const char *name, const void *value, size_t size int attrnamespace = (strncmp(name, "system", 6) == 0) ? EXTATTR_NAMESPACE_SYSTEM : EXTATTR_NAMESPACE_USER; const char *attrname = ((s=strchr_m(name, '.')) == NULL) ? name : s + 1; - + if (flags) { + /* Check attribute existence */ + retval = extattr_get_fd(filedes, attrnamespace, attrname, NULL, 0); + if (retval < 0) { + /* REPLACE attribute, that doesn't exist */ + if (flags & XATTR_REPLACE && errno == ENOATTR) { + errno = ENOATTR; + return -1; + } + } + else { + /* CREATE attribute, that already exists */ + if (flags & XATTR_CREATE) { + errno = EEXIST; + return -1; + } + } + } retval = extattr_set_fd(filedes, attrnamespace, attrname, value, size); return (retval < 0) ? -1 : 0; #elif defined(HAVE_ATTR_SETF) |