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Fix text back end for read-only directories (make distcheck in qmckl)
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@ -172,7 +172,24 @@ trexio_text_init (trexio_t* const file)
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f->lock_file = open(file_name,O_WRONLY|O_CREAT|O_TRUNC, 0644);
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if (f->lock_file <= 0) {
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if (file->mode != 'r') {
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return TREXIO_ERRNO;
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} else {
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if (errno == EACCES) {
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/* The directory is read-only and the lock file can't be written.
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Create a dummy temporary file for dummy locking.
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*/
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char dirname[TREXIO_MAX_FILENAME_LENGTH] = "/tmp/trexio.XXXXXX";
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mkdtemp(dirname);
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strncpy (file_name, dirname, TREXIO_MAX_FILENAME_LENGTH);
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strncat (file_name, lock_file_name, TREXIO_MAX_FILENAME_LENGTH-strlen(lock_file_name));
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f->lock_file = open(file_name,O_WRONLY|O_CREAT|O_TRUNC, 0644);
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remove(file_name);
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rmdir(dirname);
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} else {
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return TREXIO_ERRNO;
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}
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}
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}
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return TREXIO_SUCCESS;
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