From mboxrd@z Thu Jan 1 00:00:00 1970 Return-path: Received: from 3.mo2.mail-out.ovh.net ([46.105.58.226] helo=mo2.mail-out.ovh.net) by merlin.infradead.org with esmtp (Exim 4.76 #1 (Red Hat Linux)) id 1T8z8Q-000848-Sn for barebox@lists.infradead.org; Tue, 04 Sep 2012 19:50:18 +0000 Received: from mail21.ha.ovh.net (b6.ovh.net [213.186.33.56]) by mo2.mail-out.ovh.net (Postfix) with SMTP id 23DC8DC5B19 for ; Tue, 4 Sep 2012 21:55:24 +0200 (CEST) From: Jean-Christophe PLAGNIOL-VILLARD Date: Tue, 4 Sep 2012 21:50:16 +0200 Message-Id: <1346788217-16042-18-git-send-email-plagnioj@jcrosoft.com> In-Reply-To: <1346788217-16042-1-git-send-email-plagnioj@jcrosoft.com> References: <20120904194720.GB32603@game.jcrosoft.org> <1346788217-16042-1-git-send-email-plagnioj@jcrosoft.com> List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: barebox-bounces@lists.infradead.org Errors-To: barebox-bounces+u.kleine-koenig=pengutronix.de@lists.infradead.org Subject: [PATCH 18/19] envfs: add support of symlink To: barebox@lists.infradead.org Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD --- common/environment.c | 103 +++++++++++++++++++++++++++++++++++--------------- 1 file changed, 73 insertions(+), 30 deletions(-) diff --git a/common/environment.c b/common/environment.c index fc5c57e..ce46f4a 100644 --- a/common/environment.c +++ b/common/environment.c @@ -54,7 +54,20 @@ int file_size_action(const char *filename, struct stat *statbuf, data->writep += sizeof(struct envfs_inode); data->writep += PAD4(strlen(filename) + 1 - strlen(data->base)); data->writep += sizeof(struct envfs_inode_end); - data->writep += PAD4(statbuf->st_size); + if (S_ISLNK(statbuf->st_mode)) { + char path[PATH_MAX]; + + memset(path, 0, PATH_MAX); + + if (readlink(filename, path, PATH_MAX - 1) < 0) { + perror("read"); + return 0; + } + data->writep += PAD4(strlen(path) + 1); + } else { + data->writep += PAD4(statbuf->st_size); + } + return 1; } @@ -67,13 +80,9 @@ int file_save_action(const char *filename, struct stat *statbuf, int fd; int namelen = strlen(filename) + 1 - strlen(data->base); - debug("handling file %s size %ld namelen %d\n", filename + strlen(data->base), - statbuf->st_size, namelen); - inode = (struct envfs_inode*)data->writep; inode->magic = ENVFS_32(ENVFS_INODE_MAGIC); inode->headerlen = ENVFS_32(PAD4(namelen + sizeof(struct envfs_inode_end))); - inode->size = ENVFS_32(statbuf->st_size); data->writep += sizeof(struct envfs_inode); strcpy(data->writep, filename + strlen(data->base)); @@ -83,19 +92,44 @@ int file_save_action(const char *filename, struct stat *statbuf, inode_end->magic = ENVFS_32(ENVFS_INODE_END_MAGIC); inode_end->mode = ENVFS_32(S_IRWXU | S_IRWXG | S_IRWXO); - fd = open(filename, O_RDONLY); - if (fd < 0) { - printf("Open %s %s\n", filename, errno_str()); - goto out; - } + if (S_ISLNK(statbuf->st_mode)) { + char path[PATH_MAX]; + int len; - if (read(fd, data->writep, statbuf->st_size) < statbuf->st_size) { - perror("read"); - goto out; - } - close(fd); + memset(path, 0, PATH_MAX); + + if (readlink(filename, path, PATH_MAX - 1) < 0) { + perror("read"); + goto out; + } + len = strlen(path) + 1; + + inode_end->mode |= ENVFS_32(S_IFLNK); - data->writep += PAD4(statbuf->st_size); + memcpy(data->writep, path, len); + inode->size = ENVFS_32(len); + data->writep += PAD4(len); + debug("handling symlink %s size %ld namelen %d headerlen %d\n", filename + strlen(data->base), + len, namelen, ENVFS_32(inode->headerlen)); + } else { + debug("handling file %s size %ld namelen %d headerlen %d\n", filename + strlen(data->base), + statbuf->st_size, namelen, ENVFS_32(inode->headerlen)); + + inode->size = ENVFS_32(statbuf->st_size); + fd = open(filename, O_RDONLY); + if (fd < 0) { + printf("Open %s %s\n", filename, errno_str()); + goto out; + } + + if (read(fd, data->writep, statbuf->st_size) < statbuf->st_size) { + perror("read"); + goto out; + } + close(fd); + + data->writep += PAD4(statbuf->st_size); + } out: return 1; @@ -277,22 +311,31 @@ int envfs_load(char *filename, char *dir) goto out; } - fd = open(str, O_WRONLY | O_CREAT | O_TRUNC, 0644); - free(str); - if (fd < 0) { - printf("Open %s\n", errno_str()); - ret = fd; - goto out; - } - - ret = write(fd, buf, inode_size); - if (ret < inode_size) { - perror("write"); - ret = -errno; + if (S_ISLNK(ENVFS_32(inode_end->mode))) { + debug("symlink: %s -> %s\n", str, (char*)buf); + if (symlink((char*)buf, str) < 0) { + printf("symlink: %s -> %s :", str, (char*)buf); + perror(""); + } + free(str); + } else { + fd = open(str, O_WRONLY | O_CREAT | O_TRUNC, 0644); + free(str); + if (fd < 0) { + printf("Open %s\n", errno_str()); + ret = fd; + goto out; + } + + ret = write(fd, buf, inode_size); + if (ret < inode_size) { + perror("write"); + ret = -errno; + close(fd); + goto out; + } close(fd); - goto out; } - close(fd); buf += PAD4(inode_size); size -= headerlen_full + PAD4(inode_size) + -- 1.7.10.4 _______________________________________________ barebox mailing list barebox@lists.infradead.org http://lists.infradead.org/mailman/listinfo/barebox