| 1 | /* |
| 2 | Copyright (C) Andrew Tridgell 1998 |
| 3 | Copyright (C) 2002 by Martin Pool |
| 4 | |
| 5 | This program is free software; you can redistribute it and/or modify |
| 6 | it under the terms of the GNU General Public License as published by |
| 7 | the Free Software Foundation; either version 2 of the License, or |
| 8 | (at your option) any later version. |
| 9 | |
| 10 | This program is distributed in the hope that it will be useful, |
| 11 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 13 | GNU General Public License for more details. |
| 14 | |
| 15 | You should have received a copy of the GNU General Public License |
| 16 | along with this program; if not, write to the Free Software |
| 17 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
| 18 | */ |
| 19 | |
| 20 | /** |
| 21 | * @file compat.c |
| 22 | * |
| 23 | * Reimplementations of standard functions for platforms that don't |
| 24 | * have them. |
| 25 | **/ |
| 26 | |
| 27 | |
| 28 | |
| 29 | #include "rsync.h" |
| 30 | |
| 31 | |
| 32 | #ifndef HAVE_STRDUP |
| 33 | char *strdup(char *s) |
| 34 | { |
| 35 | int l = strlen(s) + 1; |
| 36 | char *ret = (char *)malloc(l); |
| 37 | if (ret) |
| 38 | strcpy(ret,s); |
| 39 | return ret; |
| 40 | } |
| 41 | #endif |
| 42 | |
| 43 | #ifndef HAVE_GETCWD |
| 44 | char *getcwd(char *buf, int size) |
| 45 | { |
| 46 | return getwd(buf); |
| 47 | } |
| 48 | #endif |
| 49 | |
| 50 | |
| 51 | #ifndef HAVE_WAITPID |
| 52 | pid_t waitpid(pid_t pid, int *statptr, int options) |
| 53 | { |
| 54 | #ifdef HAVE_WAIT4 |
| 55 | return wait4(pid, statptr, options, NULL); |
| 56 | #else |
| 57 | /* If wait4 is also not available, try wait3 for SVR3 variants */ |
| 58 | /* Less ideal because can't actually request a specific pid */ |
| 59 | /* At least the WNOHANG option is supported */ |
| 60 | /* Code borrowed from apache fragment written by dwd@bell-labs.com */ |
| 61 | int tmp_pid, dummystat;; |
| 62 | if (kill(pid, 0) == -1) { |
| 63 | errno = ECHILD; |
| 64 | return -1; |
| 65 | } |
| 66 | if (statptr == NULL) |
| 67 | statptr = &dummystat; |
| 68 | while (((tmp_pid = wait3(statptr, options, 0)) != pid) && |
| 69 | (tmp_pid != -1) && (tmp_pid != 0) && (pid != -1)) |
| 70 | ; |
| 71 | return tmp_pid; |
| 72 | #endif |
| 73 | } |
| 74 | #endif |
| 75 | |
| 76 | |
| 77 | #ifndef HAVE_MEMMOVE |
| 78 | void *memmove(void *dest, const void *src, size_t n) |
| 79 | { |
| 80 | bcopy((char *) src, (char *) dest, n); |
| 81 | return dest; |
| 82 | } |
| 83 | #endif |
| 84 | |
| 85 | #ifndef HAVE_STRPBRK |
| 86 | /** |
| 87 | * Find the first ocurrence in @p s of any character in @p accept. |
| 88 | * |
| 89 | * Derived from glibc |
| 90 | **/ |
| 91 | char *strpbrk(const char *s, const char *accept) |
| 92 | { |
| 93 | while (*s != '\0') { |
| 94 | const char *a = accept; |
| 95 | while (*a != '\0') { |
| 96 | if (*a++ == *s) return (char *)s; |
| 97 | } |
| 98 | ++s; |
| 99 | } |
| 100 | |
| 101 | return NULL; |
| 102 | } |
| 103 | #endif |
| 104 | |
| 105 | |
| 106 | #ifndef HAVE_STRLCPY |
| 107 | /** |
| 108 | * Like strncpy but does not 0 fill the buffer and always null |
| 109 | * terminates. |
| 110 | * |
| 111 | * @param bufsize is the size of the destination buffer. |
| 112 | * |
| 113 | * @return index of the terminating byte. |
| 114 | **/ |
| 115 | size_t strlcpy(char *d, const char *s, size_t bufsize) |
| 116 | { |
| 117 | size_t len = strlen(s); |
| 118 | size_t ret = len; |
| 119 | if (bufsize > 0) { |
| 120 | if (len >= bufsize) |
| 121 | len = bufsize-1; |
| 122 | memcpy(d, s, len); |
| 123 | d[len] = 0; |
| 124 | } |
| 125 | return ret; |
| 126 | } |
| 127 | #endif |
| 128 | |
| 129 | #ifndef HAVE_STRLCAT |
| 130 | /** |
| 131 | * Like strncat() but does not 0 fill the buffer and always null |
| 132 | * terminates. |
| 133 | * |
| 134 | * @param bufsize length of the buffer, which should be one more than |
| 135 | * the maximum resulting string length. |
| 136 | **/ |
| 137 | size_t strlcat(char *d, const char *s, size_t bufsize) |
| 138 | { |
| 139 | size_t len1 = strlen(d); |
| 140 | size_t len2 = strlen(s); |
| 141 | size_t ret = len1 + len2; |
| 142 | |
| 143 | if (len1 < bufsize - 1) { |
| 144 | if (len2 >= bufsize - len1) |
| 145 | len2 = bufsize - len1 - 1; |
| 146 | memcpy(d+len1, s, len2); |
| 147 | d[len1+len2] = 0; |
| 148 | } |
| 149 | return ret; |
| 150 | } |
| 151 | #endif |
| 152 | |
| 153 | #ifdef REPLACE_INET_NTOA |
| 154 | char *rep_inet_ntoa(struct in_addr ip) |
| 155 | { |
| 156 | unsigned char *p = (unsigned char *)&ip.s_addr; |
| 157 | static char buf[18]; |
| 158 | #if WORDS_BIGENDIAN |
| 159 | snprintf(buf, 18, "%d.%d.%d.%d", |
| 160 | (int)p[0], (int)p[1], (int)p[2], (int)p[3]); |
| 161 | #else |
| 162 | snprintf(buf, 18, "%d.%d.%d.%d", |
| 163 | (int)p[3], (int)p[2], (int)p[1], (int)p[0]); |
| 164 | #endif |
| 165 | return buf; |
| 166 | } |
| 167 | #endif |
| 168 | |
| 169 | #ifdef REPLACE_INET_ATON |
| 170 | int inet_aton(const char *cp, struct in_addr *inp) |
| 171 | { |
| 172 | unsigned int a1, a2, a3, a4; |
| 173 | unsigned long ret; |
| 174 | |
| 175 | if (strcmp(cp, "255.255.255.255") == 0) { |
| 176 | inp->s_addr = (unsigned) -1; |
| 177 | return 0; |
| 178 | } |
| 179 | |
| 180 | if (sscanf(cp, "%u.%u.%u.%u", &a1, &a2, &a3, &a4) != 4 || |
| 181 | a1 > 255 || a2 > 255 || a3 > 255 || a4 > 255) { |
| 182 | return 0; |
| 183 | } |
| 184 | |
| 185 | ret = (a1 << 24) | (a2 << 16) | (a3 << 8) | a4; |
| 186 | |
| 187 | inp->s_addr = htonl(ret); |
| 188 | |
| 189 | if (inp->s_addr == (unsigned) -1) { |
| 190 | return 0; |
| 191 | } |
| 192 | return 1; |
| 193 | } |
| 194 | #endif |
| 195 | |
| 196 | /* some systems don't take the 2nd argument */ |
| 197 | int sys_gettimeofday(struct timeval *tv) |
| 198 | { |
| 199 | #if HAVE_GETTIMEOFDAY_TZ |
| 200 | return gettimeofday(tv, NULL); |
| 201 | #else |
| 202 | return gettimeofday(tv); |
| 203 | #endif |
| 204 | } |