diff options
Diffstat (limited to 'src/modules/systemlib/param/param.c')
| -rw-r--r-- | src/modules/systemlib/param/param.c | 15 |
1 files changed, 11 insertions, 4 deletions
diff --git a/src/modules/systemlib/param/param.c b/src/modules/systemlib/param/param.c index 69a9bdf9b..c69de52b7 100644 --- a/src/modules/systemlib/param/param.c +++ b/src/modules/systemlib/param/param.c @@ -505,24 +505,31 @@ param_get_default_file(void) int param_save_default(void) { + int result; + /* delete the file in case it exists */ - unlink(param_get_default_file()); + struct stat buffer; + if (stat(param_get_default_file(), &buffer) == 0) { + result = unlink(param_get_default_file()); + if (result != OK) + warnx("unlinking file %s failed.", param_get_default_file()); + } /* create the file */ int fd = open(param_get_default_file(), O_WRONLY | O_CREAT | O_EXCL); if (fd < 0) { warn("opening '%s' for writing failed", param_get_default_file()); - return -1; + return fd; } - int result = param_export(fd, false); + result = param_export(fd, false); close(fd); if (result != 0) { warn("error exporting parameters to '%s'", param_get_default_file()); unlink(param_get_default_file()); - return -2; + return result; } return 0; |