open, creat, read, write, lseek and close
Are they all primitive?
:confused:
*Another Question: is there a different between a system call, and an i/o system call? (2 Replies)
Hi,
I'm new to UNIX system calls. Can someone share your knowledge as to how exactly system calls should be executed?
Can they be typed like commands such as mkdir on the terminal itself? Also, are there any websites which will show me an example of the output to expect when a system call like... (1 Reply)
Hello,
how would i be able to call ps in C programming?
thanks,
---------- Post updated at 01:39 AM ---------- Previous update was at 01:31 AM ----------
here's the complete system call, ps -o pid -p %d, getpit() (2 Replies)
Hi friends,
I have three questions.
1) What are system calls?
2) Is it necessary that system calls be in c language (in unix operating system)?
3) Importance of c language when programming in unix environment???
Looking forward to your wonderful replies!
... (2 Replies)
Hi friends,
I hope everyone is fine and doing well. I queried in my previous thread about the low-level qualities of C/C++ languages.I really thank you people for explaining, it was really helpful. One more ambiquity that I have in my mind is regarding the unix system calls like open, creat,... (1 Reply)
Discussion started by: gabam
1 Replies
LEARN ABOUT ULTRIX
mkproto
mkproto(8) Unsupported mkproto(8)Name
mkproto - construct a prototype file system
Syntax
/etc/mkproto special proto
Description
The command is used to bootstrap a new file system. First a new file system is created using The command is then used to copy files from
the old file system into the new file system according to the directions found in the prototype file proto. The prototype file contains
tokens separated by spaces or new lines. The first tokens comprise the specification for the root directory. File specifications consist
of tokens giving the mode, the user-id, the group id, and the initial contents of the file. The syntax of the contents field depends on
the mode.
The mode token for a file is a 6 character string. The first character specifies the type of the file. (The characters -bcd specify regu-
lar, block special, character special and directory files respectively.) The second character of the type is either u or - to specify set-
user-id mode or not. The third is g or - for the set-group-id mode. The rest of the mode is a three digit octal number giving the owner,
group, and other read, write, execute permissions. See
Two decimal number tokens come after the mode; they specify the user and group ID's of the owner of the file.
If the file is a regular file, the next token is a pathname whence the contents and size are copied.
If the file is a block or character special file, two decimal number tokens follow which give the major and minor device numbers.
If the file is a directory, makes the entries . and .. and then reads a list of names and (recursively) file specifications for the
entries in the directory. The scan is terminated with the token $.
A sample prototype specification follows:
d--777 3 1
usr d--777 3 1
sh ---755 3 1 /bin/sh
ken d--755 6 1
$
b0 b--644 3 1 0 0
c0 c--644 3 1 0 0
$
$
Restrictions
You can only run on virgin file systems. It should be possible to copy files into existent file systems.
See Alsodir(5), fs(5), fsck(8), newfs(8)mkproto(8)