wimlib_write(): Add WIMLIB_WRITE_FLAG_FSYNC

[wimlib] / src / write.c

diff --git a/src/write.c b/src/write.c
index 668c7abd03c0c21353aa2ec65cd4c6adb1a4e40d..eed40df89654843f95895b7d13008e2b52a106a4 100644 (file)
--- a/src/write.c
+++ b/src/write.c
@@ -80,7 +80,6 @@ static int reopen_rw(WIMStruct *w)
 WIMLIBAPI int wimlib_overwrite(WIMStruct *w, int write_flags,
                               unsigned num_threads)
 {
 WIMLIBAPI int wimlib_overwrite(WIMStruct *w, int write_flags,
                               unsigned num_threads)
 {

-       const char *wimfile_name;

        size_t wim_name_len;
        int ret;
 
        size_t wim_name_len;
        int ret;
 


@@ -88,23 +87,21 @@ WIMLIBAPI int wimlib_overwrite(WIMStruct *w, int write_flags,
                return WIMLIB_ERR_INVALID_PARAM;
 
        write_flags &= ~WIMLIB_WRITE_FLAG_NO_LOOKUP_TABLE;
                return WIMLIB_ERR_INVALID_PARAM;
 
        write_flags &= ~WIMLIB_WRITE_FLAG_NO_LOOKUP_TABLE;

-
-       wimfile_name = w->filename;
-
-       DEBUG("Replacing WIM file `%s'.", wimfile_name);
-
-       if (!wimfile_name)
+       if (!w->filename)

                return WIMLIB_ERR_NO_FILENAME;
 
                return WIMLIB_ERR_NO_FILENAME;
 

+       DEBUG("Replacing WIM file `%s'.", w->filename);
+

        /* Write the WIM to a temporary file. */
        /* XXX should the temporary file be somewhere else? */
        /* Write the WIM to a temporary file. */
        /* XXX should the temporary file be somewhere else? */

-       wim_name_len = strlen(wimfile_name);
+       wim_name_len = strlen(w->filename);

        char tmpfile[wim_name_len + 10];
        char tmpfile[wim_name_len + 10];

-       memcpy(tmpfile, wimfile_name, wim_name_len);
+       memcpy(tmpfile, w->filename, wim_name_len);

        randomize_char_array_with_alnum(tmpfile + wim_name_len, 9);
        tmpfile[wim_name_len + 9] = '\0';
 
        randomize_char_array_with_alnum(tmpfile + wim_name_len, 9);
        tmpfile[wim_name_len + 9] = '\0';
 

-       ret = wimlib_write(w, tmpfile, WIM_ALL_IMAGES, write_flags,
+       ret = wimlib_write(w, tmpfile, WIM_ALL_IMAGES,
+                          write_flags | WIMLIB_WRITE_FLAG_FSYNC,

                           num_threads);
        if (ret != 0) {
                ERROR("Failed to write the WIM file `%s'", tmpfile);
                           num_threads);
        if (ret != 0) {
                ERROR("Failed to write the WIM file `%s'", tmpfile);


@@ -117,27 +114,30 @@ WIMLIBAPI int wimlib_overwrite(WIMStruct *w, int write_flags,
        /* Close the original WIM file that was opened for reading. */
        if (w->fp) {
                if (fclose(w->fp) != 0) {
        /* Close the original WIM file that was opened for reading. */
        if (w->fp) {
                if (fclose(w->fp) != 0) {

-                       WARNING("Failed to close the file `%s'", wimfile_name);
+                       WARNING("Failed to close the file `%s'", w->filename);

                }
                w->fp = NULL;
        }
 
                }
                w->fp = NULL;
        }
 

-       DEBUG("Renaming `%s' to `%s'", tmpfile, wimfile_name);
+       DEBUG("Renaming `%s' to `%s'", tmpfile, w->filename);

 
        /* Rename the new file to the old file .*/
 
        /* Rename the new file to the old file .*/

-       if (rename(tmpfile, wimfile_name) != 0) {
+       if (rename(tmpfile, w->filename) != 0) {

                ERROR_WITH_ERRNO("Failed to rename `%s' to `%s'",
                ERROR_WITH_ERRNO("Failed to rename `%s' to `%s'",

-                                tmpfile, wimfile_name);
-               /* Remove temporary file. */
-               if (unlink(tmpfile) != 0)
-                       ERROR_WITH_ERRNO("Failed to remove `%s'", tmpfile);
-               return WIMLIB_ERR_RENAME;
+                                tmpfile, w->filename);
+               ret = WIMLIB_ERR_RENAME;
+               goto err;

        }
 
        if (write_flags & WIMLIB_WRITE_FLAG_SHOW_PROGRESS)
        }
 
        if (write_flags & WIMLIB_WRITE_FLAG_SHOW_PROGRESS)

-               printf("Successfully renamed `%s' to `%s'\n", tmpfile, wimfile_name);
+               printf("Successfully renamed `%s' to `%s'\n", tmpfile, w->filename);

 
        return 0;
 
        return 0;

+err:
+       /* Remove temporary file. */
+       if (unlink(tmpfile) != 0)
+               ERROR_WITH_ERRNO("Failed to remove `%s'", tmpfile);
+       return ret;

 }
 
 static int check_resource_offset(struct lookup_table_entry *lte, void *arg)
 }
 
 static int check_resource_offset(struct lookup_table_entry *lte, void *arg)


@@ -1742,9 +1742,19 @@ int finish_write(WIMStruct *w, int image, int write_flags)
        if (ret != 0)
                return ret;
 
        if (ret != 0)
                return ret;
 

-       DEBUG("Closing output file.");
-       wimlib_assert(w->out_fp != NULL);
-       if (fclose(w->out_fp) != 0) {
+       if (write_flags & WIMLIB_WRITE_FLAG_FSYNC) {
+               DEBUG("fsync output WIM file");
+               if (fflush(out) != 0
+                   || fsync(fileno(out)) != 0)
+               {
+                       ERROR_WITH_ERRNO("Error flushing data to WIM file");
+                       ret = WIMLIB_ERR_WRITE;
+               }
+       }
+
+       DEBUG("Closing output WIM file.");
+
+       if (fclose(out) != 0) {

                ERROR_WITH_ERRNO("Failed to close the WIM file");
                ret = WIMLIB_ERR_WRITE;
        }
                ERROR_WITH_ERRNO("Failed to close the WIM file");
                ret = WIMLIB_ERR_WRITE;
        }


@@ -1797,6 +1807,7 @@ WIMLIBAPI int wimlib_write(WIMStruct *w, const char *path,
                return WIMLIB_ERR_INVALID_IMAGE;
 
 
                return WIMLIB_ERR_INVALID_IMAGE;
 
 

+

        if (w->hdr.total_parts != 1) {
                ERROR("Cannot call wimlib_write() on part of a split WIM");
                return WIMLIB_ERR_SPLIT_UNSUPPORTED;
        if (w->hdr.total_parts != 1) {
                ERROR("Cannot call wimlib_write() on part of a split WIM");
                return WIMLIB_ERR_SPLIT_UNSUPPORTED;