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 "namespace.h" 36 #include <sys/cdefs.h> 37 #include <sys/types.h> 38 #include <sys/syscall.h> 39 #include <sys/upmap.h> 40 #include <sys/time.h> 41 #include <machine/cpufunc.h> 42 #include <errno.h> 43 #include <time.h> 44 #include <stdio.h> 45 #include <stdlib.h> 46 #include <unistd.h> 47 48 #include "libc_private.h" 49 #include "upmap.h" 50 #include "un-namespace.h" 51 52 static int fast_spt_state; 53 static int fast_spt_count; 54 static char *sptbuf; 55 56 /* 57 * This is called from gen/setproctitle.c 58 */ 59 int 60 __ukp_spt(const char *fmt, va_list ap) 61 { 62 size_t n; 63 size_t t; 64 65 if (fast_spt_state == 0 && fast_spt_count++ >= 10) { 66 __upmap_map(&sptbuf, &fast_spt_state, UPTYPE_PROC_TITLE); 67 __upmap_map(NULL, &fast_spt_state, 0); 68 } 69 if (fast_spt_state > 0) { 70 t = UKPLEN_DECODE(UPTYPE_PROC_TITLE); 71 n = snprintf(sptbuf, t, "%s: ", _getprogname()); 72 vsnprintf(sptbuf + n, t - n, fmt, ap); 73 return 0; 74 } else { 75 return -1; 76 } 77 } 78