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@@ -9,11 +9,20 @@
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#include <syslog.h>
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+/* magic to make GCC check for proper format strings. */
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+#ifdef __GNUC__
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+#define CHECK_PRINTF(formatIdx, firstArg) \
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+ __attribute__ ((format (printf, formatIdx, firstArg)))
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+#else
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+#define CHECK_PRINTF(formatIdx, firstArg)
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+#endif
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+
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/* Outputs a message to stdout and also logs the same message using syslog. */
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-void log(int severity, const char *format, ...);
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+void log(int severity, const char *format, ...) CHECK_PRINTF(2,3);
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#ifdef __GNUC__
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-void _log_fn(int severity, const char *funcname, const char *format, ...);
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+void _log_fn(int severity, const char *funcname, const char *format, ...)
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+ CHECK_PRINTF(3,4);
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#define log_fn(severity, args...) \
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_log_fn(severity, __PRETTY_FUNCTION__, args)
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#else
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