Added some pathes for AROS operating system. We need someone to test it out now :)

Also, there is a realpath implementation there wich may be useful for BeOS too


git-svn-id: svn://pulkomandy.tk/GrafX2/trunk@421 416bcca6-2ee7-4201-b75f-2eb2f807beb1

realpath.c

@@ -0,0 +1,86 @@
+/*   Found in:
+     http://amiga.sourceforge.net/amigadevhelp/FUNCTIONS/GeekGadgets/realpath/ex02_realpath.c
+*/
+
+#include <limits.h>
+#include <stdlib.h>
+#include <errno.h>
+#include <fcntl.h>
+#include <string.h>
+#include <unistd.h>
+
+static char *sep(char *path)
+{
+	char *tmp, c;
+	
+	tmp = strrchr(path, '/');
+	if(tmp) {
+		c = tmp[1];
+		tmp[1] = 0;
+		if (chdir(path)) {
+			return NULL;
+		}
+		tmp[1] = c;
+		
+		return tmp + 1;
+	}
+	
+	return path;
+
+}
+
+char *realpath(const char *_path, char *resolved_path)
+{
+	int fd = open(".", O_RDONLY), l;
+	char path[PATH_MAX], lnk[PATH_MAX], *tmp = (char *)"";
+	char tmp2[PATH_MAX];
+	
+	if (fd < 0) {
+		return NULL;
+	}
+	strncpy(path, _path, PATH_MAX);
+	
+	if (chdir(path)) {
+		if (errno == ENOTDIR) {
+			l = readlink(path, lnk, PATH_MAX);
+			if (!(tmp = sep(path))) {
+				resolved_path = NULL;
+				goto abort;
+			}
+			if (l < 0) {
+				if (errno != EINVAL) {
+					resolved_path = NULL;
+					goto abort;
+				}
+			} else {
+				lnk[l] = 0;
+				if (!(tmp = sep(lnk))) {
+					resolved_path = NULL;
+					goto abort;
+				}
+			}
+		} else {
+			resolved_path = NULL;
+			goto abort;
+		}
+	}
+	
+	if(resolved_path==NULL) // if we called realpath with null as a 2nd arg
+		resolved_path = (char*) malloc( PATH_MAX );
+		
+	if (!getcwd(resolved_path, PATH_MAX)) {
+		resolved_path = NULL;
+		goto abort;
+	}
+	
+	if(strcmp(resolved_path, "/") && *tmp) {
+		strcat(resolved_path, "/");
+	}
+	
+	strcat(resolved_path, tmp);
+      abort:
+	fchdir(fd);
+	close(fd);
+	return resolved_path;
+}
+