1/* 2 * Reimplementations of standard functions for platforms that don't have them. 3 * 4 * Copyright (C) 1998 Andrew Tridgell 5 * Copyright (C) 2002 Martin Pool 6 * Copyright (C) 2004, 2005, 2006 Wayne Davison 7 * 8 * This program is free software; you can redistribute it and/or modify 9 * it under the terms of the GNU General Public License as published by 10 * the Free Software Foundation; either version 2 of the License, or 11 * (at your option) any later version. 12 * 13 * This program is distributed in the hope that it will be useful, 14 * but WITHOUT ANY WARRANTY; without even the implied warranty of 15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 16 * GNU General Public License for more details. 17 * 18 * You should have received a copy of the GNU General Public License along 19 * with this program; if not, write to the Free Software Foundation, Inc., 20 * 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. 21 */ 22 23#include "rsync.h" 24 25#ifndef HAVE_STRDUP 26 char *strdup(char *s) 27{ 28 int len = strlen(s) + 1; 29 char *ret = (char *)malloc(len); 30 if (ret) 31 memcpy(ret, s, len); 32 return ret; 33} 34#endif 35 36#ifndef HAVE_GETCWD 37 char *getcwd(char *buf, int size) 38{ 39 return getwd(buf); 40} 41#endif 42 43 44#ifndef HAVE_WAITPID 45 pid_t waitpid(pid_t pid, int *statptr, int options) 46{ 47#ifdef HAVE_WAIT4 48 return wait4(pid, statptr, options, NULL); 49#else 50 /* If wait4 is also not available, try wait3 for SVR3 variants */ 51 /* Less ideal because can't actually request a specific pid */ 52 /* At least the WNOHANG option is supported */ 53 /* Code borrowed from apache fragment written by dwd@bell-labs.com */ 54 int tmp_pid, dummystat;; 55 if (kill(pid, 0) == -1) { 56 errno = ECHILD; 57 return -1; 58 } 59 if (statptr == NULL) 60 statptr = &dummystat; 61 while (((tmp_pid = wait3(statptr, options, 0)) != pid) && 62 (tmp_pid != -1) && (tmp_pid != 0) && (pid != -1)) 63 ; 64 return tmp_pid; 65#endif 66} 67#endif 68 69 70#ifndef HAVE_MEMMOVE 71 void *memmove(void *dest, const void *src, size_t n) 72{ 73 bcopy((char *) src, (char *) dest, n); 74 return dest; 75} 76#endif 77 78#ifndef HAVE_STRPBRK 79/** 80 * Find the first ocurrence in @p s of any character in @p accept. 81 * 82 * Derived from glibc 83 **/ 84 char *strpbrk(const char *s, const char *accept) 85{ 86 while (*s != '\0') { 87 const char *a = accept; 88 while (*a != '\0') { 89 if (*a++ == *s) return (char *)s; 90 } 91 ++s; 92 } 93 94 return NULL; 95} 96#endif 97 98 99#ifndef HAVE_STRLCPY 100/** 101 * Like strncpy but does not 0 fill the buffer and always null 102 * terminates. 103 * 104 * @param bufsize is the size of the destination buffer. 105 * 106 * @return index of the terminating byte. 107 **/ 108 size_t strlcpy(char *d, const char *s, size_t bufsize) 109{ 110 size_t len = strlen(s); 111 size_t ret = len; 112 if (bufsize > 0) { 113 if (len >= bufsize) 114 len = bufsize-1; 115 memcpy(d, s, len); 116 d[len] = 0; 117 } 118 return ret; 119} 120#endif 121 122#ifndef HAVE_STRLCAT 123/** 124 * Like strncat() but does not 0 fill the buffer and always null 125 * terminates. 126 * 127 * @param bufsize length of the buffer, which should be one more than 128 * the maximum resulting string length. 129 **/ 130 size_t strlcat(char *d, const char *s, size_t bufsize) 131{ 132 size_t len1 = strlen(d); 133 size_t len2 = strlen(s); 134 size_t ret = len1 + len2; 135 136 if (len1 < bufsize - 1) { 137 if (len2 >= bufsize - len1) 138 len2 = bufsize - len1 - 1; 139 memcpy(d+len1, s, len2); 140 d[len1+len2] = 0; 141 } 142 return ret; 143} 144#endif 145 146/* some systems don't take the 2nd argument */ 147int sys_gettimeofday(struct timeval *tv) 148{ 149#ifdef HAVE_GETTIMEOFDAY_TZ 150 return gettimeofday(tv, NULL); 151#else 152 return gettimeofday(tv); 153#endif 154} 155