fix: Allow configuration for temporary files directory

Author: suninsky

configure.ac

@@ -21,7 +21,7 @@
 dnl Process this file with autoconf to produce a configure script.
 
 AC_PREREQ(2.59)
-AC_INIT(cosfs, 1.0.21)
+AC_INIT(cosfs, 1.0.22)
 AC_CONFIG_HEADER([config.h])
 
 AC_CANONICAL_SYSTEM

src/curl.cpp

@@ -49,6 +49,7 @@
 #include "s3fs.h"
 #include "s3fs_util.h"
 #include "s3fs_auth.h"
+#include "fdcache.h"
 
 using namespace std;
 
@@ -69,13 +70,13 @@ static bool make_md5_from_string(const char* pstr, string& md5)
     return false;
   }
   FILE* fp;
-  if(NULL == (fp = tmpfile())){
-    S3FS_PRN_ERR("Could not make tmpfile.");
+  if(NULL == (fp = FdManager::MakeTempFile())){
+    S3FS_PRN_ERR("failed to open temporary file by errno(%d)", errno);
     return false;
   }
   size_t length = strlen(pstr);
   if(length != fwrite(pstr, sizeof(char), length, fp)){
-    S3FS_PRN_ERR("Failed to write tmpfile.");
+    S3FS_PRN_ERR("failed to write temporary file by errno(%d)", errno);
     fclose(fp);
     return false;
   }

src/fdcache.cpp

@@ -54,15 +54,6 @@ using namespace std;
 //------------------------------------------------
 #define MAX_MULTIPART_CNT   10000                   // OSS multipart max count
 
-//
-// For cache directory top path
-//
-#if defined(P_tmpdir)
-#define TMPFILE_DIR_0PATH   P_tmpdir
-#else
-#define TMPFILE_DIR_0PATH   "/tmp"
-#endif
-
 size_t FdEntity::max_prefetch_bytes = 100 * 1024 * 1024;
 
 //------------------------------------------------
@@ -1229,8 +1220,8 @@ int FdEntity::NoCacheLoadAndPost(off_t start, size_t size)
   // open temporary file
   FILE* ptmpfp;
   int   tmpfd;
-  if(NULL == (ptmpfp = tmpfile()) || -1 ==(tmpfd = fileno(ptmpfp))){
-    S3FS_PRN_ERR("failed to open tmp file. err(%d)", errno);
+  if(NULL == (ptmpfp = FdManager::MakeTempFile()) || -1 ==(tmpfd = fileno(ptmpfp))){
+    S3FS_PRN_ERR("failed to open temporary file by errno(%d)", errno);
     if(ptmpfp){
       fclose(ptmpfp);
     }
@@ -1836,7 +1827,7 @@ pthread_mutex_t FdManager::fd_manager_lock;
 bool            FdManager::is_lock_init(false);
 string          FdManager::cache_dir("");
 size_t          FdManager::free_disk_space = 0;
-std::string     FdManager::tmp_dir = "";
+std::string     FdManager::tmp_dir = "/tmp";
 
 //------------------------------------------------
 // FdManager class methods
@@ -1969,7 +1960,7 @@ fsblkcnt_t FdManager::GetFreeDiskSpace(const char* path)
   if(0 < FdManager::cache_dir.size()){
     ctoppath = FdManager::cache_dir + "/";
   }else{
-    ctoppath = TMPFILE_DIR_0PATH "/";
+    ctoppath = tmp_dir + "/";
   }
   if(path && '\0' != *path){
     ctoppath += path;
@@ -1983,8 +1974,31 @@ fsblkcnt_t FdManager::GetFreeDiskSpace(const char* path)
   return (vfsbuf.f_bavail * vfsbuf.f_bsize);
 }
 
+bool FdManager::IsDir(const std::string* dir)
+{
+    // check the directory
+    struct stat st;
+    if(0 != stat(dir->c_str(), &st)){
+        S3FS_PRN_ERR("could not stat() directory %s by errno(%d).", dir->c_str(), errno);
+        return false;
+    }
+    if(!S_ISDIR(st.st_mode)){
+        S3FS_PRN_ERR("the directory %s is not a directory.", dir->c_str());
+        return false;
+    }
+    return true;
+}
+
+bool FdManager::CheckTmpDirExist()
+{
+    if(FdManager::tmp_dir.empty()){
+        return true;
+    }
+    return IsDir(&tmp_dir);
+}
+
 FILE* FdManager::MakeTempFile() {
-    if (tmp_dir.empty()) {
+    if (tmp_dir.empty() || tmp_dir == "/tmp") {
       return tmpfile();
     }
     int fd;
@@ -2237,7 +2251,7 @@ bool FdManager::SetTmpDir(const char *dir)
         tmp_dir = "/tmp";
     }else{
         tmp_dir = dir;
-    }
+    } 
     return true;
 }
 

src/fdcache.h

@@ -201,6 +201,7 @@ class FdManager
 
   private:
     static fsblkcnt_t GetFreeDiskSpace(const char* path);
+    static bool IsDir(const std::string* dir);
 
   public:
     FdManager();
@@ -230,6 +231,7 @@ class FdManager
     bool Close(FdEntity* ent);
     bool ChangeEntityToTempPath(FdEntity* ent, const char* path);
     static bool SetTmpDir(const char* dir);
+    static bool CheckTmpDirExist();
     static FILE* MakeTempFile();
 };
 

src/s3fs.cpp

@@ -4625,6 +4625,10 @@ static int my_fuse_opt_proc(void* data, const char* arg, int key, struct fuse_ar
       S3fsCurl::SetRetries(static_cast<int>(s3fs_strtoofft(strchr(arg, '=') + sizeof(char))));
       return 0;
     }
+    if(0 == STR2NCMP(arg, "tmpdir=")){
+      FdManager::SetTmpDir(strchr(arg, '=') + sizeof(char));
+      return 0;
+    }
     if(0 == STR2NCMP(arg, "use_cache=")){
       FdManager::SetCacheDir(strchr(arg, '=') + sizeof(char));
       return 0;
@@ -4661,10 +4665,6 @@ static int my_fuse_opt_proc(void* data, const char* arg, int key, struct fuse_ar
       S3fsCurl::SetUserAgentSuffix(user_agent_suffix);
       return 0;
     }
-    if(0 == STR2NCMP(arg, "tmpdir=")){
-      FdManager::SetTmpDir(strchr(arg, '=') + sizeof(char));
-      return 0;
-    }
     // old format for storage_class
     if(0 == strcmp(arg, "use_rrs") || 0 == STR2NCMP(arg, "use_rrs=")){
       off_t rrs = 1;
@@ -5212,6 +5212,14 @@ int main(int argc, char* argv[])
     // like checking for appropriate lengths and characters
   }
 
+  // check tmp dir permission
+  if(!FdManager::CheckTmpDirExist()){
+      S3FS_PRN_EXIT("temporary directory doesn't exists.");
+      S3fsCurl::DestroyS3fsCurl();
+      s3fs_destroy_global_ssl();
+      exit(EXIT_FAILURE);
+  }
+
   // check cache dir permission
   if(!FdManager::CheckCacheTopDir() || !CacheFileStat::CheckCacheFileStatTopDir()){
     S3FS_PRN_EXIT("could not allow cache directory permission, check permission of cache directories.");