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#include <misc/sys/syslog.h> libc_hidden_proto (syslog) libc_hidden_proto (vsyslog) extern void __vsyslog_chk (int __pri, int __flag, const char *__fmt, __gnuc_va_list __ap) __attribute__ ((__format__ (__printf__, 3, 0))); libc_hidden_proto (__vsyslog_chk)