1 /* 2 * Copyright (c) 2014 The DragonFly Project. All rights reserved. 3 * 4 * This code is derived from software contributed to The DragonFly Project 5 * by Matthew Dillon <dillon@backplane.com> 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in 15 * the documentation and/or other materials provided with the 16 * distribution. 17 * 3. Neither the name of The DragonFly Project nor the names of its 18 * contributors may be used to endorse or promote products derived 19 * from this software without specific, prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 22 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 23 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 24 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 25 * COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 26 * INCIDENTAL, SPECIAL, EXEMPLARY OR CONSEQUENTIAL DAMAGES (INCLUDING, 27 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; 28 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 29 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 30 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 31 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 */ 34 35 #include <sys/cdefs.h> 36 #include <sys/types.h> 37 #include <sys/syscall.h> 38 #include <sys/upmap.h> 39 #include <sys/time.h> 40 #include <machine/cpufunc.h> 41 #include <errno.h> 42 #include <time.h> 43 #include <stdio.h> 44 #include <stdlib.h> 45 #include <unistd.h> 46 /*#include "un-namespace.h"*/ 47 #include "libc_private.h" 48 #include "upmap.h" 49 50 static int fast_spt_state; 51 static int fast_spt_count; 52 static char *sptbuf; 53 54 /* 55 * This is called from gen/setproctitle.c 56 */ 57 int 58 __ukp_spt(const char *fmt, va_list ap) 59 { 60 size_t n; 61 size_t t; 62 63 if (fast_spt_state == 0 && fast_spt_count++ >= 10) { 64 __upmap_map(&sptbuf, &fast_spt_state, UPTYPE_PROC_TITLE); 65 __upmap_map(NULL, &fast_spt_state, 0); 66 } 67 if (fast_spt_state > 0) { 68 t = UKPLEN_DECODE(UPTYPE_PROC_TITLE); 69 n = snprintf(sptbuf, t, "%s: ", getprogname()); 70 vsnprintf(sptbuf + n, t - n, fmt, ap); 71 return 0; 72 } else { 73 return -1; 74 } 75 } 76