/*
Copyright (C) Andrew Tridgell 1998
+ Copyright (C) 2002 by Martin Pool
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
-/*
- compatibility functions - replacing functions for platforms that don't
- have them.
+/**
+ * @file compat.c
+ *
+ * Reimplementations of standard functions for platforms that don't
+ * have them.
+ **/
+
+
- */
#include "rsync.h"
#endif
#ifndef HAVE_GETCWD
-char *getcwd(char *buf, int size)
+ char *getcwd(char *buf, int size)
{
return getwd(buf);
}
#ifndef HAVE_WAITPID
-pid_t waitpid(pid_t pid, int *statptr, int options)
+ pid_t waitpid(pid_t pid, int *statptr, int options)
{
+#ifdef HAVE_WAIT4
return wait4(pid, statptr, options, NULL);
+#else
+ /* If wait4 is also not available, try wait3 for SVR3 variants */
+ /* Less ideal because can't actually request a specific pid */
+ /* At least the WNOHANG option is supported */
+ /* Code borrowed from apache fragment written by dwd@bell-labs.com */
+ int tmp_pid, dummystat;;
+ if (kill(pid, 0) == -1) {
+ errno = ECHILD;
+ return -1;
+ }
+ if (statptr == NULL)
+ statptr = &dummystat;
+ while (((tmp_pid = wait3(statptr, options, 0)) != pid) &&
+ (tmp_pid != -1) && (tmp_pid != 0) && (pid != -1))
+ ;
+ return tmp_pid;
+#endif
+}
+#endif
+
+
+#ifndef HAVE_MEMMOVE
+ void *memmove(void *dest, const void *src, size_t n)
+{
+ bcopy((char *) src, (char *) dest, n);
+ return dest;
+}
+#endif
+
+#ifndef HAVE_STRPBRK
+/**
+ * Find the first ocurrence in @p s of any character in @p accept.
+ *
+ * Derived from glibc
+ **/
+ char *strpbrk(const char *s, const char *accept)
+{
+ while (*s != '\0') {
+ const char *a = accept;
+ while (*a != '\0') {
+ if (*a++ == *s) return (char *)s;
+ }
+ ++s;
+ }
+
+ return NULL;
}
#endif
+
+#ifndef HAVE_STRLCPY
+/**
+ * Like strncpy but does not 0 fill the buffer and always null
+ * terminates.
+ *
+ * @param bufsize is the size of the destination buffer.
+ *
+ * @return index of the terminating byte.
+ **/
+ size_t strlcpy(char *d, const char *s, size_t bufsize)
+{
+ size_t len = strlen(s);
+ size_t ret = len;
+ if (bufsize > 0) {
+ if (len >= bufsize)
+ len = bufsize-1;
+ memcpy(d, s, len);
+ d[len] = 0;
+ }
+ return ret;
+}
+#endif
+
+#ifndef HAVE_STRLCAT
+/**
+ * Like strncat() but does not 0 fill the buffer and always null
+ * terminates.
+ *
+ * @param bufsize length of the buffer, which should be one more than
+ * the maximum resulting string length.
+ **/
+ size_t strlcat(char *d, const char *s, size_t bufsize)
+{
+ size_t len1 = strlen(d);
+ size_t len2 = strlen(s);
+ size_t ret = len1 + len2;
+
+ if (len1 < bufsize - 1) {
+ if (len2 >= bufsize - len1)
+ len2 = bufsize - len1 - 1;
+ memcpy(d+len1, s, len2);
+ d[len1+len2] = 0;
+ }
+ return ret;
+}
+#endif
+
+/* some systems don't take the 2nd argument */
+int sys_gettimeofday(struct timeval *tv)
+{
+#ifdef HAVE_GETTIMEOFDAY_TZ
+ return gettimeofday(tv, NULL);
+#else
+ return gettimeofday(tv);
+#endif
+}