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-rw-r--r--base/file_util_posix.cc219
1 files changed, 110 insertions, 109 deletions
diff --git a/base/file_util_posix.cc b/base/file_util_posix.cc
index 027337f..b6a4945 100644
--- a/base/file_util_posix.cc
+++ b/base/file_util_posix.cc
@@ -150,6 +150,47 @@ std::string TempFileName() {
#endif
}
+// Creates and opens a temporary file in |directory|, returning the
+// file descriptor. |path| is set to the temporary file path.
+// This function does NOT unlink() the file.
+int CreateAndOpenFdForTemporaryFile(FilePath directory, FilePath* path) {
+ ThreadRestrictions::AssertIOAllowed(); // For call to mkstemp().
+ *path = directory.Append(base::TempFileName());
+ const std::string& tmpdir_string = path->value();
+ // this should be OK since mkstemp just replaces characters in place
+ char* buffer = const_cast<char*>(tmpdir_string.c_str());
+
+ return HANDLE_EINTR(mkstemp(buffer));
+}
+
+#if defined(OS_LINUX)
+// Determine if /dev/shm files can be mapped and then mprotect'd PROT_EXEC.
+// This depends on the mount options used for /dev/shm, which vary among
+// different Linux distributions and possibly local configuration. It also
+// depends on details of kernel--ChromeOS uses the noexec option for /dev/shm
+// but its kernel allows mprotect with PROT_EXEC anyway.
+bool DetermineDevShmExecutable() {
+ bool result = false;
+ FilePath path;
+ int fd = CreateAndOpenFdForTemporaryFile(FilePath("/dev/shm"), &path);
+ if (fd >= 0) {
+ file_util::ScopedFD shm_fd_closer(&fd);
+ DeleteFile(path, false);
+ long sysconf_result = sysconf(_SC_PAGESIZE);
+ CHECK_GE(sysconf_result, 0);
+ size_t pagesize = static_cast<size_t>(sysconf_result);
+ CHECK_GE(sizeof(pagesize), sizeof(sysconf_result));
+ void *mapping = mmap(NULL, pagesize, PROT_READ, MAP_SHARED, fd, 0);
+ if (mapping != MAP_FAILED) {
+ if (mprotect(mapping, pagesize, PROT_READ | PROT_EXEC) == 0)
+ result = true;
+ munmap(mapping, pagesize);
+ }
+ }
+ return result;
+}
+#endif // defined(OS_LINUX)
+
} // namespace
FilePath MakeAbsoluteFilePath(const FilePath& input) {
@@ -405,6 +446,73 @@ bool SetPosixFilePermissions(const FilePath& path,
return true;
}
+#if !defined(OS_MACOSX)
+// This is implemented in file_util_mac.mm for Mac.
+bool GetTempDir(FilePath* path) {
+ const char* tmp = getenv("TMPDIR");
+ if (tmp) {
+ *path = FilePath(tmp);
+ } else {
+#if defined(OS_ANDROID)
+ return PathService::Get(base::DIR_CACHE, path);
+#else
+ *path = FilePath("/tmp");
+#endif
+ }
+ return true;
+}
+#endif // !defined(OS_MACOSX)
+
+#if !defined(OS_MACOSX) && !defined(OS_ANDROID)
+// This is implemented in file_util_mac.mm and file_util_android.cc for those
+// platforms.
+bool GetShmemTempDir(bool executable, FilePath* path) {
+#if defined(OS_LINUX)
+ bool use_dev_shm = true;
+ if (executable) {
+ static const bool s_dev_shm_executable = DetermineDevShmExecutable();
+ use_dev_shm = s_dev_shm_executable;
+ }
+ if (use_dev_shm) {
+ *path = FilePath("/dev/shm");
+ return true;
+ }
+#endif
+ return GetTempDir(path);
+}
+#endif // !defined(OS_MACOSX) && !defined(OS_ANDROID)
+
+#if !defined(OS_MACOSX)
+FilePath GetHomeDir() {
+#if defined(OS_CHROMEOS)
+ if (SysInfo::IsRunningOnChromeOS())
+ return FilePath("/home/chronos/user");
+#endif
+
+ const char* home_dir = getenv("HOME");
+ if (home_dir && home_dir[0])
+ return FilePath(home_dir);
+
+#if defined(OS_ANDROID)
+ DLOG(WARNING) << "OS_ANDROID: Home directory lookup not yet implemented.";
+#elif defined(USE_GLIB) && !defined(OS_CHROMEOS)
+ // g_get_home_dir calls getpwent, which can fall through to LDAP calls.
+ ThreadRestrictions::AssertIOAllowed();
+
+ home_dir = g_get_home_dir();
+ if (home_dir && home_dir[0])
+ return FilePath(home_dir);
+#endif
+
+ FilePath rv;
+ if (GetTempDir(&rv))
+ return rv;
+
+ // Last resort.
+ return FilePath("/tmp");
+}
+#endif // !defined(OS_MACOSX)
+
} // namespace base
// -----------------------------------------------------------------------------
@@ -414,6 +522,7 @@ namespace file_util {
using base::stat_wrapper_t;
using base::CallStat;
using base::CallLstat;
+using base::CreateAndOpenFdForTemporaryFile;
using base::DirectoryExists;
using base::FileEnumerator;
using base::FilePath;
@@ -421,19 +530,6 @@ using base::MakeAbsoluteFilePath;
using base::RealPath;
using base::VerifySpecificPathControlledByUser;
-// Creates and opens a temporary file in |directory|, returning the
-// file descriptor. |path| is set to the temporary file path.
-// This function does NOT unlink() the file.
-int CreateAndOpenFdForTemporaryFile(FilePath directory, FilePath* path) {
- base::ThreadRestrictions::AssertIOAllowed(); // For call to mkstemp().
- *path = directory.Append(base::TempFileName());
- const std::string& tmpdir_string = path->value();
- // this should be OK since mkstemp just replaces characters in place
- char* buffer = const_cast<char*>(tmpdir_string.c_str());
-
- return HANDLE_EINTR(mkstemp(buffer));
-}
-
bool CreateTemporaryFile(FilePath* path) {
base::ThreadRestrictions::AssertIOAllowed(); // For call to close().
FilePath directory;
@@ -448,7 +544,7 @@ bool CreateTemporaryFile(FilePath* path) {
FILE* CreateAndOpenTemporaryShmemFile(FilePath* path, bool executable) {
FilePath directory;
- if (!GetShmemTempDir(&directory, executable))
+ if (!GetShmemTempDir(executable, &directory))
return NULL;
return CreateAndOpenTemporaryFileInDir(directory, path);
@@ -725,101 +821,6 @@ bool NormalizeFilePath(const FilePath& path, FilePath* normalized_path) {
return true;
}
-#if !defined(OS_MACOSX)
-bool GetTempDir(FilePath* path) {
- const char* tmp = getenv("TMPDIR");
- if (tmp)
- *path = FilePath(tmp);
- else
-#if defined(OS_ANDROID)
- return PathService::Get(base::DIR_CACHE, path);
-#else
- *path = FilePath("/tmp");
-#endif
- return true;
-}
-
-#if !defined(OS_ANDROID)
-
-#if defined(OS_LINUX)
-// Determine if /dev/shm files can be mapped and then mprotect'd PROT_EXEC.
-// This depends on the mount options used for /dev/shm, which vary among
-// different Linux distributions and possibly local configuration. It also
-// depends on details of kernel--ChromeOS uses the noexec option for /dev/shm
-// but its kernel allows mprotect with PROT_EXEC anyway.
-
-namespace {
-
-bool DetermineDevShmExecutable() {
- bool result = false;
- FilePath path;
- int fd = CreateAndOpenFdForTemporaryFile(FilePath("/dev/shm"), &path);
- if (fd >= 0) {
- ScopedFD shm_fd_closer(&fd);
- DeleteFile(path, false);
- long sysconf_result = sysconf(_SC_PAGESIZE);
- CHECK_GE(sysconf_result, 0);
- size_t pagesize = static_cast<size_t>(sysconf_result);
- CHECK_GE(sizeof(pagesize), sizeof(sysconf_result));
- void *mapping = mmap(NULL, pagesize, PROT_READ, MAP_SHARED, fd, 0);
- if (mapping != MAP_FAILED) {
- if (mprotect(mapping, pagesize, PROT_READ | PROT_EXEC) == 0)
- result = true;
- munmap(mapping, pagesize);
- }
- }
- return result;
-}
-
-}; // namespace
-#endif // defined(OS_LINUX)
-
-bool GetShmemTempDir(FilePath* path, bool executable) {
-#if defined(OS_LINUX)
- bool use_dev_shm = true;
- if (executable) {
- static const bool s_dev_shm_executable = DetermineDevShmExecutable();
- use_dev_shm = s_dev_shm_executable;
- }
- if (use_dev_shm) {
- *path = FilePath("/dev/shm");
- return true;
- }
-#endif
- return GetTempDir(path);
-}
-#endif // !defined(OS_ANDROID)
-
-FilePath GetHomeDir() {
-#if defined(OS_CHROMEOS)
- if (base::SysInfo::IsRunningOnChromeOS())
- return FilePath("/home/chronos/user");
-#endif
-
- const char* home_dir = getenv("HOME");
- if (home_dir && home_dir[0])
- return FilePath(home_dir);
-
-#if defined(OS_ANDROID)
- DLOG(WARNING) << "OS_ANDROID: Home directory lookup not yet implemented.";
-#elif defined(USE_GLIB) && !defined(OS_CHROMEOS)
- // g_get_home_dir calls getpwent, which can fall through to LDAP calls.
- base::ThreadRestrictions::AssertIOAllowed();
-
- home_dir = g_get_home_dir();
- if (home_dir && home_dir[0])
- return FilePath(home_dir);
-#endif
-
- FilePath rv;
- if (file_util::GetTempDir(&rv))
- return rv;
-
- // Last resort.
- return FilePath("/tmp");
-}
-#endif // !defined(OS_MACOSX)
-
bool VerifyPathControlledByUser(const FilePath& base,
const FilePath& path,
uid_t owner_uid,
generated by cgit v1.1 at 2025-05-11 00:38:54 +0000