Use Sys_Open from Kernel Level
Hi I Am Having Some Trouble Using Sys_Open. at This Point I Am Starting to Think That I Am Doing Something Wrong with the Arguments of the Functions. an...
Hi i am having some trouble using sys_open.At this point i am starting to think that i am doing something wrong with the arguments of the functions. An example of how i use it:
fd = sys_open("file.txt" , O_WRONLY | O_CREAT, 0);
sys_write(fd, "test\n", strlen("test\n"));
sys_fsync(fd);
sys_fdatasync(fd);
sys_close(fd);
fd value is a non negative integer (0) . Every single one of the functions returns 0 so i guess they are executed corectly.Except sys_write. Every time that i go to find the file after i write on it i can never find it any idea maybe something on my code is wrong?
1 Answer
The sys_ family of functions for Linux are considered deprecated now. However, for the purposes of this question, sys_open is a user-level function that calls the open syscall, which then calls the kernel level do_sys_open(), the latter two defined in fs/open.c. So to open files from within the kernel you should stick to kernel level functions and not user-level functions.
Here are some answers about opening files at the kernel level, some of which are deprecated as well, so be aware.
Elena Rostova holds a Master's degree in Public Health Journalism. She covers groundbreaking medical research, holistic wellness trends, mental health awareness, and nutritional science.
