X-Git-Url: http://git.harvie.cz/?a=blobdiff_plain;f=c%2Fcano%2Fold%2Fcano3.c;fp=c%2Fcano%2Fold%2Fcano3.c;h=68ebefb0d9f4f8def0c3e253cbad9887dc423197;hb=d3b2d1a75c5c62e4d7142124162e2deb8273b32b;hp=0000000000000000000000000000000000000000;hpb=b9a41889280efffe1d21fb094e175f0f204ea039;p=mirrors%2FPrograms.git

diff --git a/c/cano/old/cano3.c b/c/cano/old/cano3.c
new file mode 100644
index 0000000..68ebefb
--- /dev/null
+++ b/c/cano/old/cano3.c
@@ -0,0 +1,99 @@
+#define _GNU_SOURCE
+/*
+#include <stdlib.h>
+#include <sys/types.h>
+#include <unistd.h>
+#include <stdarg.h>
+#include <time.h>
+#include <string.h>
+
+       #include <sys/types.h>
+       #include <sys/stat.h>
+       #include <fcntl.h>
+*/
+#include <dlfcn.h>
+#include <stdio.h>
+#include <sys/syscall.h>
+#include <linux/limits.h>
+
+#define i { srand(23); fprintf(stderr,"%s();\n",__func__); }
+//Catch open() calls (while redirecting filename):
+
+static const char *fd_to_path(int fd) {
+	static char path[PATH_MAX];
+	sprintf(path,"/proc/self/fd/%d",fd);
+	int l = (int) readlink((char * __restrict__) path, path, PATH_MAX);
+	path[l]=0;
+	return path;
+}
+
+int close(int fd) {
+	//fputs(fd_to_path(fd),stderr);
+	fprintf(stderr,"%s(%d,%s);\n",__func__,fd,fd_to_path(fd));
+	if(fd>2) return syscall(SYS_close,fd);
+}
+int fclose(FILE *fd) {
+	//fputs(fd_to_path(fd),stderr);
+	fprintf(stderr,"%s(%d,%d,%s);\n",__func__,fileno(fd),fd,fd_to_path(fileno(fd)));
+	static ssize_t (*fclose_orig)(FILE *fd);
+	if (!fclose_orig) {
+		fclose_orig = dlsym(RTLD_NEXT, "fclose");
+	}
+	return fclose_orig(fd);
+	//return syscall(SYS_close,fileno(fd));
+}
+/*
+ssize_t write(int fd, const void *buf, size_t count) {
+	//fputs(fd_to_path(fd),stderr);
+	printf("%d",fd);
+	i;
+	return syscall(SYS_write,fd,buf,count);
+}
+*/
+/*
+static const char *redirect_name(const char *name)
+{
+	if(
+		(strcmp(name,"/dev/random") == 0) ||
+		(strcmp(name,"/dev/urandom") == 0)
+	) {
+		printf("REDIRECT HIT: %s\n", name);
+		return "/dev/zero";
+	}
+	return name;
+}
+
+
+int open(const char *filename, int flags, ...)
+{
+	//srand(23);
+	static int (*open_orig)(const char *, int, mode_t);
+	int ret;
+	va_list ap;
+	mode_t mode;
+
+	if (!open_orig) {
+		open_orig = dlsym(RTLD_NEXT, "open");
+	}
+
+	va_start(ap, flags);
+	mode = va_arg(ap, mode_t);
+	va_end(ap);
+
+	if(strcmp(filename,"/tmp/lol.txt.asc") != 0) {
+		ret = open_orig(redirect_name(filename), flags, mode);
+		//ret = syscall(SYS_open,redirect_name(filename),flags,mode);
+	} else {
+		if(flags & O_RDONLY) {
+			ret = fileno(popen("cat aaaa", "r"));
+		} else {
+			ret = fileno(popen("tee aaaa", "w"));
+		}
+	}
+
+	printf("open(\"%s\", 0x%x, %o) -> %d\n", filename, flags, mode, ret);
+
+	return ret;
+}
+
+*/