Compile on systems without O_TMPFILE.

[plocate] / database-builder.cpp

diff --git a/database-builder.cpp b/database-builder.cpp
index 1e3b442d1fb10af81d51ecdb99f8c527a942f36a..89a06d6c59a52399a11c05a6513df780f4edb281 100644 (file)
--- a/database-builder.cpp
+++ b/database-builder.cpp
@@ -427,11 +427,24 @@ DatabaseBuilder::DatabaseBuilder(const char *outfile, gid_t owner, int block_siz
        if (path.empty()) {
                path = ".";
        }
+#ifdef O_TMPFILE
        int fd = open(path.c_str(), O_WRONLY | O_TMPFILE, 0640);
        if (fd == -1) {
                perror(path.c_str());
                exit(1);
        }
+#else
+       temp_filename = string(outfile) + ".XXXXXX";
+       int fd = mkstemp(&temp_filename[0]);
+       if (fd == -1) {
+               perror(temp_filename.c_str());
+               exit(1);
+       }
+       if (fchmod(fd, 0640) == -1) {
+               perror("fchmod");
+               exit(1);
+       }
+#endif
 
        if (owner != (gid_t)-1) {
                if (fchown(fd, (uid_t)-1, owner) == -1) {
@@ -608,6 +621,7 @@ void DatabaseBuilder::finish_corpus()
        fseek(outfp, 0, SEEK_SET);
        fwrite(&hdr, sizeof(hdr), 1, outfp);
 
+#ifdef O_TMPFILE
        // Give the file a proper name, making it visible in the file system.
        // TODO: It would be nice to be able to do this atomically, like with rename.
        unlink(outfile.c_str());
@@ -617,6 +631,12 @@ void DatabaseBuilder::finish_corpus()
                perror("linkat");
                exit(1);
        }
+#else
+       if (rename(temp_filename.c_str(), outfile.c_str()) == -1) {
+               perror("rename");
+               exit(1);
+       }
+#endif
 
        fclose(outfp);