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函数调用测试程序gcc test.c -o test # cat test.c // test.c #include stdio.h #include unistd.h #include fcntl.h #include string.h int main() { int fd = open("/tmp/test.txt", O_CREAT | O_WRONLY | O_TRUNC,
; if (fd
{ perror("open"); return 1; } const char *msg = "hello preload hook\n"; write(fd, msg, strlen(msg)); close(fd); return 0; }hook系统函数open和writegcc -shared -fPIC hook.c -o hook.so -ldl # cat hook.c #define _GNU_SOURCE #include dlfcn.h #include stdio.h #include
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