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Make param save command tolerant of FS timing

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Lorenz Meier
2013-09-18 08:44:02 +02:00
parent ac00100cb8
commit 210e7f9245
1 changed files with 5 additions and 1 deletions
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src/modules/systemlib/param/param.c
+5 -1
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@@ -519,6 +519,10 @@ param_save_default(void)
int fd = open(param_get_default_file(), O_WRONLY | O_CREAT | O_EXCL); int fd = open(param_get_default_file(), O_WRONLY | O_CREAT | O_EXCL);
if (fd < 0) { if (fd < 0) {
/* do another attempt in case the unlink call is not synced yet */
usleep(5000);
fd = open(param_get_default_file(), O_WRONLY | O_CREAT | O_EXCL);
warn("opening '%s' for writing failed", param_get_default_file()); warn("opening '%s' for writing failed", param_get_default_file());
return fd; return fd;
} }
@@ -528,7 +532,7 @@ param_save_default(void)
if (result != 0) { if (result != 0) {
warn("error exporting parameters to '%s'", param_get_default_file()); warn("error exporting parameters to '%s'", param_get_default_file());
unlink(param_get_default_file()); (void)unlink(param_get_default_file());
return result; return result;
} }