Messages in this thread | | | Date | Tue, 12 Sep 2006 14:05:41 +0200 | From | guest01 <> | Subject | OT: calling kernel syscall manually |
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Hi
Sorry guys, this question is a little bit off topic, but maybe someone has an answer, I am sure that there is a simple one. :-)
Ok, I have to find 3 possibilities to create a directory with 3 small c programs: 1 -> using libc: mkdir(dir,mode) 2 -> using libcsyscall: syscall(__NR_mkdir, "mkdirLibcSyscall", 0777); 3 -> using kernel directly
Ok, the third one is a little bit tricky, at least for me. I found an example for lseek, but I don't know how to convert that for mkdir. I don't know the necessary arguments, ..
> #include <linux/unistd.h> > > _syscall5(int, _llseek, unsigned int, fd, > unsigned long, offset_high, unsigned long, offset_low, > long long *, result, unsigned int, origin) > > long long > my_llseek(unsigned int fd, unsigned long long offset, unsigned int origin) { > long long result; > int retval; > > retval = _llseek (fd, offset >> 32, offset & 0xffffffff, > &result, origin); > return (retval == -1) ? -1 : result; > }
Any help would be much appreciated. Thxs
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