diff options
Diffstat (limited to 'file_io/unix/filestat.c')
| -rw-r--r-- | file_io/unix/filestat.c | 339 |
1 files changed, 339 insertions, 0 deletions
diff --git a/file_io/unix/filestat.c b/file_io/unix/filestat.c new file mode 100644 index 0000000..220efd0 --- /dev/null +++ b/file_io/unix/filestat.c @@ -0,0 +1,339 @@ +/* Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed with + * this work for additional information regarding copyright ownership. + * The ASF licenses this file to You under the Apache License, Version 2.0 + * (the "License"); you may not use this file except in compliance with + * the License. You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +#include "apr_arch_file_io.h" +#include "apr_file_io.h" +#include "apr_general.h" +#include "apr_strings.h" +#include "apr_errno.h" + +#ifdef HAVE_UTIME +#include <utime.h> +#endif + +static apr_filetype_e filetype_from_mode(mode_t mode) +{ + apr_filetype_e type; + + switch (mode & S_IFMT) { + case S_IFREG: + type = APR_REG; break; + case S_IFDIR: + type = APR_DIR; break; + case S_IFLNK: + type = APR_LNK; break; + case S_IFCHR: + type = APR_CHR; break; + case S_IFBLK: + type = APR_BLK; break; +#if defined(S_IFFIFO) + case S_IFFIFO: + type = APR_PIPE; break; +#endif +#if !defined(BEOS) && defined(S_IFSOCK) + case S_IFSOCK: + type = APR_SOCK; break; +#endif + + default: + /* Work around missing S_IFxxx values above + * for Linux et al. + */ +#if !defined(S_IFFIFO) && defined(S_ISFIFO) + if (S_ISFIFO(mode)) { + type = APR_PIPE; + } else +#endif +#if !defined(BEOS) && !defined(S_IFSOCK) && defined(S_ISSOCK) + if (S_ISSOCK(mode)) { + type = APR_SOCK; + } else +#endif + type = APR_UNKFILE; + } + return type; +} + +static void fill_out_finfo(apr_finfo_t *finfo, struct_stat *info, + apr_int32_t wanted) +{ + finfo->valid = APR_FINFO_MIN | APR_FINFO_IDENT | APR_FINFO_NLINK + | APR_FINFO_OWNER | APR_FINFO_PROT; + finfo->protection = apr_unix_mode2perms(info->st_mode); + finfo->filetype = filetype_from_mode(info->st_mode); + finfo->user = info->st_uid; + finfo->group = info->st_gid; + finfo->size = info->st_size; + finfo->device = info->st_dev; + finfo->nlink = info->st_nlink; + + /* Check for overflow if storing a 64-bit st_ino in a 32-bit + * apr_ino_t for LFS builds: */ + if (sizeof(apr_ino_t) >= sizeof(info->st_ino) + || (apr_ino_t)info->st_ino == info->st_ino) { + finfo->inode = info->st_ino; + } else { + finfo->valid &= ~APR_FINFO_INODE; + } + + apr_time_ansi_put(&finfo->atime, info->st_atime); +#ifdef HAVE_STRUCT_STAT_ST_ATIM_TV_NSEC + finfo->atime += info->st_atim.tv_nsec / APR_TIME_C(1000); +#elif defined(HAVE_STRUCT_STAT_ST_ATIMENSEC) + finfo->atime += info->st_atimensec / APR_TIME_C(1000); +#elif defined(HAVE_STRUCT_STAT_ST_ATIME_N) + finfo->atime += info->st_atime_n / APR_TIME_C(1000); +#endif + + apr_time_ansi_put(&finfo->mtime, info->st_mtime); +#ifdef HAVE_STRUCT_STAT_ST_MTIM_TV_NSEC + finfo->mtime += info->st_mtim.tv_nsec / APR_TIME_C(1000); +#elif defined(HAVE_STRUCT_STAT_ST_MTIMENSEC) + finfo->mtime += info->st_mtimensec / APR_TIME_C(1000); +#elif defined(HAVE_STRUCT_STAT_ST_MTIME_N) + finfo->mtime += info->st_mtime_n / APR_TIME_C(1000); +#endif + + apr_time_ansi_put(&finfo->ctime, info->st_ctime); +#ifdef HAVE_STRUCT_STAT_ST_CTIM_TV_NSEC + finfo->ctime += info->st_ctim.tv_nsec / APR_TIME_C(1000); +#elif defined(HAVE_STRUCT_STAT_ST_CTIMENSEC) + finfo->ctime += info->st_ctimensec / APR_TIME_C(1000); +#elif defined(HAVE_STRUCT_STAT_ST_CTIME_N) + finfo->ctime += info->st_ctime_n / APR_TIME_C(1000); +#endif + +#ifdef HAVE_STRUCT_STAT_ST_BLOCKS +#ifdef DEV_BSIZE + finfo->csize = (apr_off_t)info->st_blocks * (apr_off_t)DEV_BSIZE; +#else + finfo->csize = (apr_off_t)info->st_blocks * (apr_off_t)512; +#endif + finfo->valid |= APR_FINFO_CSIZE; +#endif +} + +apr_status_t apr_file_info_get_locked(apr_finfo_t *finfo, apr_int32_t wanted, + apr_file_t *thefile) +{ + struct_stat info; + + if (thefile->buffered) { + apr_status_t rv = apr_file_flush_locked(thefile); + if (rv != APR_SUCCESS) + return rv; + } + + if (fstat(thefile->filedes, &info) == 0) { + finfo->pool = thefile->pool; + finfo->fname = thefile->fname; + fill_out_finfo(finfo, &info, wanted); + return (wanted & ~finfo->valid) ? APR_INCOMPLETE : APR_SUCCESS; + } + else { + return errno; + } +} + +APR_DECLARE(apr_status_t) apr_file_info_get(apr_finfo_t *finfo, + apr_int32_t wanted, + apr_file_t *thefile) +{ + struct_stat info; + + if (thefile->buffered) { + apr_status_t rv = apr_file_flush(thefile); + if (rv != APR_SUCCESS) + return rv; + } + + if (fstat(thefile->filedes, &info) == 0) { + finfo->pool = thefile->pool; + finfo->fname = thefile->fname; + fill_out_finfo(finfo, &info, wanted); + return (wanted & ~finfo->valid) ? APR_INCOMPLETE : APR_SUCCESS; + } + else { + return errno; + } +} + +APR_DECLARE(apr_status_t) apr_file_perms_set(const char *fname, + apr_fileperms_t perms) +{ + mode_t mode = apr_unix_perms2mode(perms); + + if (chmod(fname, mode) == -1) + return errno; + return APR_SUCCESS; +} + +APR_DECLARE(apr_status_t) apr_file_attrs_set(const char *fname, + apr_fileattrs_t attributes, + apr_fileattrs_t attr_mask, + apr_pool_t *pool) +{ + apr_status_t status; + apr_finfo_t finfo; + + /* Don't do anything if we can't handle the requested attributes */ + if (!(attr_mask & (APR_FILE_ATTR_READONLY + | APR_FILE_ATTR_EXECUTABLE))) + return APR_SUCCESS; + + status = apr_stat(&finfo, fname, APR_FINFO_PROT, pool); + if (status) + return status; + + /* ### TODO: should added bits be umask'd? */ + if (attr_mask & APR_FILE_ATTR_READONLY) + { + if (attributes & APR_FILE_ATTR_READONLY) + { + finfo.protection &= ~APR_UWRITE; + finfo.protection &= ~APR_GWRITE; + finfo.protection &= ~APR_WWRITE; + } + else + { + /* ### umask this! */ + finfo.protection |= APR_UWRITE; + finfo.protection |= APR_GWRITE; + finfo.protection |= APR_WWRITE; + } + } + + if (attr_mask & APR_FILE_ATTR_EXECUTABLE) + { + if (attributes & APR_FILE_ATTR_EXECUTABLE) + { + /* ### umask this! */ + finfo.protection |= APR_UEXECUTE; + finfo.protection |= APR_GEXECUTE; + finfo.protection |= APR_WEXECUTE; + } + else + { + finfo.protection &= ~APR_UEXECUTE; + finfo.protection &= ~APR_GEXECUTE; + finfo.protection &= ~APR_WEXECUTE; + } + } + + return apr_file_perms_set(fname, finfo.protection); +} + + +APR_DECLARE(apr_status_t) apr_file_mtime_set(const char *fname, + apr_time_t mtime, + apr_pool_t *pool) +{ + apr_status_t status; + apr_finfo_t finfo; + + status = apr_stat(&finfo, fname, APR_FINFO_ATIME, pool); + if (status) { + return status; + } + +#ifdef HAVE_UTIMES + { + struct timeval tvp[2]; + + tvp[0].tv_sec = apr_time_sec(finfo.atime); + tvp[0].tv_usec = apr_time_usec(finfo.atime); + tvp[1].tv_sec = apr_time_sec(mtime); + tvp[1].tv_usec = apr_time_usec(mtime); + + if (utimes(fname, tvp) == -1) { + return errno; + } + } +#elif defined(HAVE_UTIME) + { + struct utimbuf buf; + + buf.actime = (time_t) (finfo.atime / APR_USEC_PER_SEC); + buf.modtime = (time_t) (mtime / APR_USEC_PER_SEC); + + if (utime(fname, &buf) == -1) { + return errno; + } + } +#else + return APR_ENOTIMPL; +#endif + + return APR_SUCCESS; +} + + +APR_DECLARE(apr_status_t) apr_stat(apr_finfo_t *finfo, + const char *fname, + apr_int32_t wanted, apr_pool_t *pool) +{ + struct_stat info; + int srv; + + if (wanted & APR_FINFO_LINK) + srv = lstat(fname, &info); + else + srv = stat(fname, &info); + + if (srv == 0) { + finfo->pool = pool; + finfo->fname = fname; + fill_out_finfo(finfo, &info, wanted); + if (wanted & APR_FINFO_LINK) + wanted &= ~APR_FINFO_LINK; + return (wanted & ~finfo->valid) ? APR_INCOMPLETE : APR_SUCCESS; + } + else { +#if !defined(ENOENT) || !defined(ENOTDIR) +#error ENOENT || ENOTDIR not defined; please see the +#error comments at this line in the source for a workaround. + /* + * If ENOENT || ENOTDIR is not defined in one of the your OS's + * include files, APR cannot report a good reason why the stat() + * of the file failed; there are cases where it can fail even though + * the file exists. This opens holes in Apache, for example, because + * it becomes possible for someone to get a directory listing of a + * directory even though there is an index (eg. index.html) file in + * it. If you do not have a problem with this, delete the above + * #error lines and start the compile again. If you need to do this, + * please submit a bug report to http://www.apache.org/bug_report.html + * letting us know that you needed to do this. Please be sure to + * include the operating system you are using. + */ + /* WARNING: All errors will be handled as not found + */ +#if !defined(ENOENT) + return APR_ENOENT; +#else + /* WARNING: All errors but not found will be handled as not directory + */ + if (errno != ENOENT) + return APR_ENOENT; + else + return errno; +#endif +#else /* All was defined well, report the usual: */ + return errno; +#endif + } +} + + |