Rename server/ directory to src/

Also update BUILD.txt

1 files changed, 736 insertions, 0 deletions

diff --git a/src/tools/files.c b/src/tools/files.c
new file mode 100644
index 000000000..6c6447059
--- /dev/null
+++ b/src/tools/files.c
@@ -0,0 +1,736 @@
+/*
+    Authors:
+        Jakub Hrozek <jhrozek@redhat.com>
+
+    Copyright (C) 2009 Red Hat
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 3 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+
+/*
+ * This file incorporates work covered by the following copyright and
+ * permission notice:
+ *
+ * Copyright (c) 1991 - 1994, Julianne Frances Haugh
+ * Copyright (c) 1996 - 2001, Marek Michałkiewicz
+ * Copyright (c) 2003 - 2006, Tomasz Kłoczko
+ * Copyright (c) 2007 - 2008, Nicolas François
+ *
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ * 3. The name of the copyright holders or contributors may not be used to
+ *    endorse or promote products derived from this software without
+ *    specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
+ * PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE COPYRIGHT
+ * HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <sys/time.h>
+#include <dirent.h>
+#include <fcntl.h>
+#include <errno.h>
+#include <talloc.h>
+
+#include "config.h"
+#include "util/util.h"
+#include "tools/tools_util.h"
+
+#ifdef HAVE_SELINUX
+#include <selinux/selinux.h>
+#endif
+
+int copy_tree(const char *src_root, const char *dst_root,
+              uid_t uid, gid_t gid);
+
+struct copy_ctx {
+    const char *src_orig;
+    const char *dst_orig;
+    dev_t       src_dev;
+};
+
+#ifdef HAVE_SELINUX
+/*
+ * selinux_file_context - Set the security context before any file or
+ *                        directory creation.
+ *
+ *	selinux_file_context () should be called before any creation of file,
+ *	symlink, directory, ...
+ *
+ *	Callers may have to Reset SELinux to create files with default
+ *	contexts:
+ *		reset_selinux_file_context();
+ */
+int selinux_file_context(const char *dst_name)
+{
+    security_context_t scontext = NULL;
+
+    if (is_selinux_enabled() == 1) {
+        /* Get the default security context for this file */
+        if (matchpathcon(dst_name, 0, &scontext) < 0) {
+            if (security_getenforce () != 0) {
+                return 1;
+            }
+        }
+        /* Set the security context for the next created file */
+        if (setfscreatecon(scontext) < 0) {
+            if (security_getenforce() != 0) {
+                return 1;
+            }
+        }
+        freecon(scontext);
+    }
+
+    return 0;
+}
+
+int reset_selinux_file_context(void)
+{
+    setfscreatecon(NULL);
+    return EOK;
+}
+
+#else   /* HAVE_SELINUX */
+int selinux_file_context(const char *dst_name)
+{
+    return EOK;
+}
+
+int reset_selinux_file_context(void)
+{
+    return EOK;
+}
+#endif  /* HAVE_SELINUX */
+
+/* wrapper in order not to create a temporary context in
+ * every iteration */
+static int remove_tree_with_ctx(TALLOC_CTX *mem_ctx,
+                                dev_t parent_dev,
+                                const char *root);
+
+int remove_tree(const char *root)
+{
+    TALLOC_CTX *tmp_ctx = NULL;
+    int ret;
+
+    tmp_ctx = talloc_new(NULL);
+    if (!tmp_ctx) {
+        return ENOMEM;
+    }
+
+    ret = remove_tree_with_ctx(tmp_ctx, 0, root);
+    talloc_free(tmp_ctx);
+    return ret;
+}
+
+/*
+ * The context is not freed in case of error
+ * because this is a recursive function, will be freed when we
+ * reach the top level remove_tree() again
+ */
+static int remove_tree_with_ctx(TALLOC_CTX *mem_ctx,
+                                dev_t parent_dev,
+                                const char *root)
+{
+    char *fullpath = NULL;
+    struct dirent *result;
+    struct dirent direntp;
+    struct stat statres;
+    DIR *rootdir = NULL;
+    int ret;
+
+    rootdir = opendir(root);
+    if (rootdir == NULL) {
+        ret = errno;
+        DEBUG(1, ("Cannot open directory %s [%d][%s]",
+                  root, ret, strerror(ret)));
+        goto fail;
+    }
+
+    while (readdir_r(rootdir, &direntp, &result) == 0) {
+        if (result == NULL) {
+            /* End of directory */
+            break;
+        }
+
+        if (strcmp (direntp.d_name, ".") == 0 ||
+            strcmp (direntp.d_name, "..") == 0) {
+            continue;
+        }
+
+        fullpath = talloc_asprintf(mem_ctx, "%s/%s", root, direntp.d_name);
+        if (fullpath == NULL) {
+            ret = ENOMEM;
+            goto fail;
+        }
+
+        ret = lstat(fullpath, &statres);
+        if (ret != 0) {
+            ret = errno;
+            DEBUG(1, ("Cannot stat %s: [%d][%s]\n",
+                      fullpath, ret, strerror(ret)));
+            goto fail;
+        }
+
+        if (S_ISDIR(statres.st_mode)) {
+            /* if directory, recursively descend, but check if on the same FS */
+            if (parent_dev && parent_dev != statres.st_dev) {
+                DEBUG(1, ("Directory %s is on different filesystem, "
+                          "will not follow\n", fullpath));
+                ret = EFAULT;
+                goto fail;
+            }
+
+            ret = remove_tree_with_ctx(mem_ctx, statres.st_dev, fullpath);
+            if (ret != EOK) {
+                DEBUG(1, ("Removing subdirectory %s failed: [%d][%s]\n",
+                            fullpath, ret, strerror(ret)));
+                goto fail;
+            }
+        } else {
+            ret = unlink(fullpath);
+            if (ret != 0) {
+                ret = errno;
+                DEBUG(1, ("Removing file %s failed: [%d][%s]\n",
+                          fullpath, ret, strerror(ret)));
+                goto fail;
+            }
+        }
+
+        talloc_free(fullpath);
+    }
+
+    ret = closedir(rootdir);
+    if (ret != 0) {
+        ret = errno;
+        goto fail;
+    }
+
+    ret = rmdir(root);
+    if (ret != 0) {
+        ret = errno;
+        goto fail;
+    }
+
+fail:
+    return ret;
+}
+
+static int copy_dir(const char *src, const char *dst,
+                    const struct stat *statp, const struct timeval mt[2],
+                    uid_t uid, gid_t gid)
+{
+    int ret = 0;
+
+    /*
+     * Create a new target directory, make it owned by
+     * the user and then recursively copy that directory.
+     */
+    selinux_file_context(dst);
+
+    ret = mkdir(dst, statp->st_mode);
+    if (ret != 0) {
+        ret = errno;
+        DEBUG(1, ("Cannot mkdir directory '%s': [%d][%s].\n",
+                  dst, ret, strerror(ret)));
+        return ret;
+    }
+
+    ret = chown(dst, uid, gid);
+    if (ret != 0) {
+        ret = errno;
+        DEBUG(1, ("Cannot chown directory '%s': [%d][%s].\n",
+                  dst, ret, strerror(ret)));
+        return ret;
+    }
+
+    ret = chmod(dst, statp->st_mode);
+    if (ret != 0) {
+        ret = errno;
+        DEBUG(1, ("Cannot chmod directory '%s': [%d][%s].\n",
+                  dst, ret, strerror(ret)));
+        return ret;
+    }
+
+    ret = copy_tree(src, dst, uid, gid);
+    if (ret != 0) {
+        ret = errno;
+        DEBUG(1, ("Cannot copy directory from '%s' to '%s': [%d][%s].\n",
+                  src, dst, ret, strerror(ret)));
+        return ret;
+    }
+
+    ret = utimes(dst, mt);
+    if (ret != 0) {
+        ret = errno;
+        DEBUG(1, ("Cannot set utimes on a directory '%s': [%d][%s].\n",
+                  dst, ret, strerror(ret)));
+        return ret;
+    }
+
+    return EOK;
+}
+
+static char *talloc_readlink(TALLOC_CTX *mem_ctx, const char *filename)
+{
+    size_t size = 1024;
+    ssize_t nchars;
+    char *buffer;
+
+    buffer = talloc_array(mem_ctx, char, size);
+    if (!buffer) {
+        return NULL;
+    }
+
+    while (1) {
+        nchars = readlink(filename, buffer, size);
+        if (nchars < 0) {
+            return NULL;
+        }
+
+        if ((size_t) nchars < size) {
+            /* The buffer was large enough */
+            break;
+        }
+
+        /* Try again with a bigger buffer */
+        size *= 2;
+        buffer = talloc_realloc(mem_ctx, buffer, char, size);
+        if (!buffer) {
+            return NULL;
+        }
+    }
+
+    /* readlink does not nul-terminate */
+    buffer[nchars] = '\0';
+    return buffer;
+}
+
+static int copy_symlink(struct copy_ctx *cctx,
+                        const char *src,
+                        const char *dst,
+                        const struct stat *statp,
+                        const struct timeval mt[],
+                        uid_t uid, gid_t gid)
+{
+    int ret;
+    char *oldlink;
+    char *tmp;
+    TALLOC_CTX *tmp_ctx = NULL;
+
+    tmp_ctx = talloc_new(cctx);
+    if (!tmp_ctx) {
+        return ENOMEM;
+    }
+
+    /*
+     * Get the name of the file which the link points
+     * to.  If that name begins with the original
+     * source directory name, that part of the link
+     * name will be replaced with the original
+     * destination directory name.
+     */
+    oldlink = talloc_readlink(tmp_ctx, src);
+    if (oldlink == NULL) {
+        ret = ENOMEM;
+        goto done;
+    }
+
+    /* If src was a link to an entry of the src_orig directory itself,
+     * create a link to the corresponding entry in the dst_orig
+     * directory.
+     * FIXME: This may change a relative link to an absolute link
+     */
+    if (strncmp(oldlink, cctx->src_orig, strlen(cctx->src_orig)) == 0) {
+        tmp = talloc_asprintf(tmp_ctx, "%s%s", cctx->dst_orig, oldlink + strlen(cctx->src_orig));
+        if (tmp == NULL) {
+            ret = ENOMEM;
+            goto done;
+        }
+
+        talloc_free(oldlink);
+        oldlink = tmp;
+    }
+
+    selinux_file_context(dst);
+
+    ret = symlink(oldlink, dst);
+    if (ret != 0) {
+        ret = errno;
+        DEBUG(1, ("symlink() failed on file '%s': [%d][%s].\n",
+                  dst, ret, strerror(ret)));
+        goto done;
+    }
+
+    ret = lchown(dst, uid, gid);
+    if (ret != 0) {
+        ret = errno;
+        DEBUG(1, ("lchown() failed on file '%s': [%d][%s].\n",
+                  dst, ret, strerror(ret)));
+        goto done;
+    }
+
+done:
+    talloc_free(tmp_ctx);
+    return ret;
+}
+
+static int copy_special(const char *dst,
+                        const struct stat *statp,
+                        const struct timeval mt[],
+                        uid_t uid, gid_t gid)
+{
+    int ret = 0;
+
+    selinux_file_context(dst);
+
+    ret = mknod(dst, statp->st_mode & ~07777, statp->st_rdev);
+    if (ret != 0) {
+        ret = errno;
+        DEBUG(1, ("Cannot mknod special file '%s': [%d][%s].\n",
+                  dst, ret, strerror(ret)));
+        return ret;
+    }
+
+    ret = chown(dst, uid, gid);
+    if (ret != 0) {
+        ret = errno;
+        DEBUG(1, ("Cannot chown special file '%s': [%d][%s].\n",
+                  dst, ret, strerror(ret)));
+        return ret;
+    }
+
+    ret = chmod(dst, statp->st_mode & 07777);
+    if (ret != 0) {
+        ret = errno;
+        DEBUG(1, ("Cannot chmod special file '%s': [%d][%s].\n",
+                  dst, ret, strerror(ret)));
+        return ret;
+    }
+
+    ret = utimes(dst, mt);
+    if (ret != 0) {
+        ret = errno;
+        DEBUG(1, ("Cannot call utimes on special file '%s': [%d][%s].\n",
+                  dst, ret, strerror(ret)));
+        return ret;
+    }
+
+    return EOK;
+}
+
+static int copy_file(const char *src,
+                     const char *dst,
+                     const struct stat *statp,
+                     const struct timeval mt[],
+                     uid_t uid, gid_t gid)
+{
+    int ret;
+    int ifd = -1;
+    int ofd = -1;
+    char buf[1024];
+    ssize_t cnt, written, offset;
+    struct stat fstatbuf;
+
+    ifd = open(src, O_RDONLY);
+    if (ifd < 0) {
+        ret = errno;
+        DEBUG(1, ("Cannot open() source file '%s': [%d][%s].\n",
+                  src, ret, strerror(ret)));
+        goto fail;
+    }
+
+    ret = fstat(ifd, &fstatbuf);
+    if (ret != 0) {
+        ret = errno;
+        DEBUG(1, ("Cannot fstat() source file '%s': [%d][%s].\n",
+                  src, ret, strerror(ret)));
+        goto fail;
+    }
+
+    if (statp->st_dev != fstatbuf.st_dev ||
+        statp->st_ino != fstatbuf.st_ino) {
+        DEBUG(1, ("File %s was modified between lstat and open.\n", src));
+        ret = EIO;
+        goto fail;
+    }
+
+    selinux_file_context(dst);
+
+    ofd = open(dst, O_WRONLY | O_CREAT | O_TRUNC, statp->st_mode & 07777);
+    if (ofd < 0) {
+        ret = errno;
+        DEBUG(1, ("Cannot open() destination file '%s': [%d][%s].\n",
+                  dst, ret, strerror(ret)));
+        goto fail;
+    }
+
+    ret = fchown(ofd, uid, gid);
+    if (ret != 0) {
+        ret = errno;
+        DEBUG(1, ("Cannot fchown() destination file '%s': [%d][%s].\n",
+                  dst, ret, strerror(ret)));
+        goto fail;
+    }
+
+    ret = fchmod(ofd, statp->st_mode & 07777);
+    if (ret != 0) {
+        ret = errno;
+        DEBUG(1, ("Cannot fchmod() destination file '%s': [%d][%s].\n",
+                  dst, ret, strerror(ret)));
+        goto fail;
+    }
+
+    while ((cnt = read(ifd, buf, sizeof(buf))) > 0) {
+        offset = 0;
+        while (cnt > 0) {
+            written = write(ofd, buf+offset, (size_t)cnt);
+            if (written == -1) {
+                ret = errno;
+                DEBUG(1, ("Cannot write() to source file '%s': [%d][%s].\n",
+                            dst, ret, strerror(ret)));
+                goto fail;
+            }
+            offset += written;
+            cnt -= written;
+        }
+    }
+    if (cnt == -1) {
+        ret = errno;
+        DEBUG(1, ("Cannot read() from source file '%s': [%d][%s].\n",
+                    dst, ret, strerror(ret)));
+        goto fail;
+    }
+
+
+    ret = close(ifd);
+    ifd = -1;
+    if (ret != 0) {
+        ret = errno;
+        DEBUG(1, ("Cannot close() source file '%s': [%d][%s].\n",
+                  dst, ret, strerror(ret)));
+        goto fail;
+    }
+
+    ret = close(ofd);
+    ifd = -1;
+    if (ret != 0) {
+        ret = errno;
+        DEBUG(1, ("Cannot close() destination file '%s': [%d][%s].\n",
+                  dst, ret, strerror(ret)));
+        goto fail;
+    }
+
+    ret = utimes(dst, mt);
+    if (ret != 0) {
+        ret = errno;
+        DEBUG(1, ("Cannot call utimes() on destination file '%s': [%d][%s].\n",
+                  dst, ret, strerror(ret)));
+        goto fail;
+    }
+
+    return EOK;
+
+    /* Reachable by jump only */
+fail:
+    if (ifd != -1) close(ifd);
+    if (ofd != -1) close(ofd);
+    return ret;
+}
+
+/*
+ * The context is not freed in case of error
+ * because this is a recursive function, will be freed when we
+ * reach the top level copy_tree() again
+ */
+static int copy_entry(struct copy_ctx *cctx,
+                      const char *src,
+                      const char *dst,
+                      uid_t uid,
+                      gid_t gid)
+{
+    int ret = EOK;
+    struct stat sb;
+    struct timeval mt[2];
+
+    ret = lstat(src, &sb);
+    if (ret == -1) {
+        ret = errno;
+        DEBUG(1, ("Cannot lstat() the source file '%s': [%d][%s].\n",
+                  src, ret, strerror(ret)));
+        return ret;
+    }
+
+    mt[0].tv_sec  = sb.st_atime;
+    mt[0].tv_usec = 0;
+
+    mt[1].tv_sec  = sb.st_mtime;
+    mt[1].tv_usec = 0;
+
+    if (S_ISLNK (sb.st_mode)) {
+        ret = copy_symlink(cctx, src, dst, &sb, mt, uid, gid);
+        if (ret != EOK) {
+            DEBUG(1, ("Cannot copy symlink '%s' to '%s': [%d][%s]\n",
+                      src, dst, ret, strerror(ret)));
+        }
+        return ret;
+    }
+
+    if (S_ISDIR(sb.st_mode)) {
+        /* Check if we're still on the same FS */
+        if (sb.st_dev != cctx->src_dev) {
+            DEBUG(2, ("Will not descend to other FS\n"));
+            /* Skip this without error */
+            return EOK;
+        }
+        return copy_dir(src, dst, &sb, mt, uid, gid);
+    } else if (!S_ISREG(sb.st_mode)) {
+        /*
+         * Deal with FIFOs and special files.  The user really
+         * shouldn't have any of these, but it seems like it
+         * would be nice to copy everything ...
+         */
+        return copy_special(dst, &sb, mt, uid, gid);
+    } else {
+        /*
+         * Create the new file and copy the contents.  The new
+         * file will be owned by the provided UID and GID values.
+         */
+        return copy_file(src, dst, &sb, mt, uid, gid);
+    }
+
+    return ret;
+}
+
+/*
+ * The context is not freed in case of error
+ * because this is a recursive function, will be freed when we
+ * reach the top level copy_tree() again
+ */
+static int copy_tree_ctx(struct copy_ctx *cctx,
+                         const char *src_root,
+                         const char *dst_root,
+                         uid_t uid,
+                         gid_t gid)
+{
+    DIR *src_dir;
+    int ret;
+    struct dirent *result;
+    struct dirent direntp;
+    char *src_name, *dst_name;
+    TALLOC_CTX *tmp_ctx;
+
+    tmp_ctx = talloc_new(cctx);
+
+    src_dir = opendir(src_root);
+    if (src_dir == NULL) {
+        ret = errno;
+        DEBUG(1, ("Cannot open the source directory %s: [%d][%s].\n",
+                  src_root, ret, strerror(ret)));
+        goto fail;
+    }
+
+    while (readdir_r(src_dir, &direntp, &result) == 0) {
+        if (result == NULL) {
+            /* End of directory */
+            break;
+        }
+
+        if (strcmp (direntp.d_name, ".") == 0 ||
+            strcmp (direntp.d_name, "..") == 0) {
+            continue;
+        }
+
+        /* build src and dst paths */
+        src_name = talloc_asprintf(tmp_ctx, "%s/%s", src_root, direntp.d_name);
+        dst_name = talloc_asprintf(tmp_ctx, "%s/%s", dst_root, direntp.d_name);
+        if (dst_name == NULL || src_name == NULL) {
+            ret = ENOMEM;
+            goto fail;
+        }
+
+        /* copy */
+        ret = copy_entry(cctx, src_name, dst_name, uid, gid);
+        if (ret != EOK) {
+            DEBUG(1, ("Cannot copy '%s' to '%s', error %d\n",
+                      src_name, dst_name, ret));
+            goto fail;
+        }
+        talloc_free(src_name);
+        talloc_free(dst_name);
+    }
+
+    ret = closedir(src_dir);
+    if (ret != 0) {
+        ret = errno;
+        goto fail;
+    }
+
+fail:
+    talloc_free(tmp_ctx);
+    return ret;
+}
+
+int copy_tree(const char *src_root, const char *dst_root,
+              uid_t uid, gid_t gid)
+{
+    int ret = EOK;
+    struct copy_ctx *cctx = NULL;
+    struct stat s_src;
+
+    cctx = talloc_zero(NULL, struct copy_ctx);
+
+    ret = lstat(src_root, &s_src);
+    if (ret != 0) {
+        ret = errno;
+        DEBUG(1, ("Cannot lstat the source directory '%s': [%d][%s]\n",
+                  src_root, ret, strerror(ret)));
+        goto fail;
+    }
+
+    cctx->src_orig = src_root;
+    cctx->dst_orig = dst_root;
+    cctx->src_dev  = s_src.st_dev;
+
+    ret = copy_tree_ctx(cctx, src_root, dst_root, uid, gid);
+    if (ret != EOK) {
+        DEBUG(1, ("copy_tree_ctx failed: [%d][%s]\n", ret, strerror(ret)));
+        goto fail;
+    }
+
+fail:
+    reset_selinux_file_context();
+    talloc_free(cctx);
+    return ret;
+}
+