Sponsored Content
Full Discussion: where does stdout link to?
Special Forums Hardware Filesystems, Disks and Memory where does stdout link to? Post 37343 by Perderabo on Tuesday 17th of June 2003 09:57:09 AM
Old 06-17-2003
The internal detail vary based on the kernel and the details that you are quoting are alien to me. The fd table points to a system file table entry. The first one is called stdout. With the kernels I know, the file table will then point to a vnode.

/dev/tty and /dev/null are not called ordinary files. They are called special files because they actually connect to a driver.

But stdout is opened just like every other file...well it could be a socket. But the kernel does not treat fd 0 any differently than, say, fd 5.
 

9 More Discussions You Might Find Interesting

1. UNIX for Advanced & Expert Users

Differences between hard link and soft link

Hi all! I'd like to know the differences between hard links and soft links. I've already read the ln manpage, but i'm not quite sure of what i understood. Does a hard link sort of copy the file to a new name, give it the same inode number and same rights? What exactly should I do to do this:... (3 Replies)
Discussion started by: penguin-friend
3 Replies

2. UNIX for Dummies Questions & Answers

Difference between hard link and soft link in unix

Hi All, Can any one please explain me what is the difference between hard link and soft link in UNIX. Thanks in advance Raja Chokalingam. (2 Replies)
Discussion started by: RAJACHOKALINGAM
2 Replies

3. UNIX for Dummies Questions & Answers

need some info about symbolic link and hard link

hello folks how y'all doin well i have some questions about symbolic link and hard link hope some one answer me i open terminal and join as root and i wrote ln -s blah blah then i wrote ls i see red file called blah blah but didn't understand what is this can some one explain and... (2 Replies)
Discussion started by: detective linux
2 Replies

4. UNIX for Dummies Questions & Answers

Hard Link vs SOft Link????

Hi PLease let me know the usage of Hard Link vs Soft Link i.e what is the basic difference and what happens when one file is changed or deleted in both the cases??? thanks (3 Replies)
Discussion started by: skyineyes
3 Replies

5. UNIX for Dummies Questions & Answers

Difference between hard link and soft link

Hi Experts, Please help me out to find out difference between a hard link and a soft link. I am new in unix plz help me with some example commands ( for creating such links). Regards S.Kamakshi :) (2 Replies)
Discussion started by: kamakshi s
2 Replies

6. Programming

g++ fails to link to static library when compilation and link in single command

Hello All, I've encountered a strange behaviour from g++ that doesn't make sense to me. Maybe you can shed some light on it: I have a bunch of source files and want to compile them and link them with a static library liba.a located in /usr/local/lib64 into an executable Approach 1 works... (0 Replies)
Discussion started by: magelord
0 Replies

7. UNIX for Dummies Questions & Answers

[Solved] Symbolic link not allowed or link target not accessible

Hi everybody, I read about treads realted to this issue but they did not resovle issue given below. Please help me resolve issue given below I have html file under /srv/www/htdocs/actual_folder ls actual_folder/ test.html and following link works... (0 Replies)
Discussion started by: newbielgn
0 Replies

8. Solaris

/var/adm/messages (interface turned off/restored) and link up & link down message.

Hi All I am facing an issue with our new solaris machine. in /var/adm/messages root@Prod-App1:/var/tmp# root@Prod-App1:/var/tmp# root@Prod-App1:/var/tmp# cat /var/adm//messages Apr 20 03:10:01 Prod-App1 syslogd: line 25: WARNING: loghost could not be resolved Apr 20 08:24:18 Prod-App1... (0 Replies)
Discussion started by: javeedkaleem
0 Replies

9. Solaris

/var/adm/messages (insterface turned off/restored) and link up & link down message.

Hi All I am facing an issue with our new solaris machine. in /var/adm/messages Apr 22 16:43:05 Prod-App1 in.routed: interface net0 to 172.16.101.1 turned off Apr 22 16:43:33 Prod-App1 mac: NOTICE: nxge0 link up, 1000 Mbps, full duplex Apr 22 16:43:34 Prod-App1 mac: NOTICE: nxge0 link... (2 Replies)
Discussion started by: javeedkaleem
2 Replies
LN(1)							      General Commands Manual							     LN(1)

NAME
ln - make links SYNOPSIS
ln [ -s ] sourcename [ targetname ] ln [ -s ] sourcename1 sourcename2 [ sourcename3 ... ] targetdirectory DESCRIPTION
A link is a directory entry referring to a file; the same file (together with its size, all its protection information, etc.) may have several links to it. There are two kinds of links: hard links and symbolic links. By default ln makes hard links. A hard link to a file is indistinguishable from the original directory entry; any changes to a file are effective independent of the name used to reference the file. Hard links may not span file systems and may not refer to directories. The -s option causes ln to create symbolic links. A symbolic link contains the name of the file to which it is linked. The referenced file is used when an open(2) operation is performed on the link. A stat(2) on a symbolic link will return the linked-to file; an lstat(2) must be done to obtain information about the link. The readlink(2) call may be used to read the contents of a symbolic link. Symbolic links may span file systems and may refer to directories. Given one or two arguments, ln creates a link to an existing file sourcename. If targetname is given, the link has that name; targetname may also be a directory in which to place the link; otherwise it is placed in the current directory. If only the directory is specified, the link will be made to the last component of sourcename. Given more than two arguments, ln makes links in targetdirectory to all the named source files. The links made will have the same name as the files being linked to. SEE ALSO
rm(1), cp(1), mv(1), link(2), readlink(2), stat(2), symlink(2) 4th Berkeley Distribution April 10, 1986 LN(1)
All times are GMT -4. The time now is 10:36 PM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy