Difference between system calls and normal functions in C Post: 302571527

10 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

System Calls

What does the system call "dup" do? What is the difference between dup and dup2 I have a fair idea of what it does but I am confused when its coming down to the exact details... Please help me!:confused:

2. UNIX for Dummies Questions & Answers

Any difference between the CLI of Mac OS X and normal UNIX?

Any?

3. UNIX for Dummies Questions & Answers

System calls for cp and mv

Which system calls are made for operations cp and mv

4. Solaris

System calls ?

where can i find the differences in System calls between solaris and aix? also is it possible to find a comprehensive list of them?

5. UNIX Desktop Questions & Answers

Using system calls

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...

6. BSD

system calls

what is the functions and relationship between fork,exec,wait system calls as i am a beginer just want the fundamentals.

7. Solaris

difference between RPATH and normal linking while building

while building in solaris and going for dynamic linking whats the difference or advantage or disadvantage in using RPATH vs while linking package and dependency libraries i need a little explanation about this RPATH option specially and the difference with normal linking using -L

8. UNIX for Dummies Questions & Answers

About system calls.

Hi all, I am new here . I want to know about system call in detail. As system calls are also function .How system identifies it.:)

9. UNIX for Dummies Questions & Answers

system calls in C

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()

10. UNIX for Dummies Questions & Answers

Difference between normal Execute permission and GUID

Hi, Any can explain the difference between the normal execute permission for the file and GUID of the file. Since the normal execute permission has right to execute file why there is need of providing GUID for the same file. Also share some examples for SUID and SGID programs. Regards...

LEARN ABOUT DEBIAN

aoe-stat

aoe-stat(8)						      System Manager's Manual						       aoe-stat(8)

NAME

       aoe-stat - print aoe device status report

SYNOPSIS

       modprobe aoe
       aoe-stat
       env sysfs_dir=/sys aoe-stat

DESCRIPTION

       The aoe-stat script collects information on ATA over Ethernet devices from sysfs.

       For each AoE device the kernel has discovered, there is one row in the script's output.	Each row has the following columns.

       devicename
	      The device name is of the form eX.Y,
	       with X being the AoE device shelf address, and Y being the AoE slot address.

       size   The size of the AoE device is in gigabytes (billions of bytes).

       ifname The network interface name is printed in the third column.

       payload
	      The  number  of  bytes  read  from  or written to the storage target in each AoE packet appears in the fourth column, unless the aoe
	      driver does not export this information.

       status The device status is in the last column.	Possible values are  up,  down, and  down,closewait.  The "up" status means the aoe driver
	      considers  this  device  ready for I/O.  The "down" status means the opposite.  The "down,closewait" status means that some software
	      still has the device open, and when this straggler closes the device, it will enter the "down" state.

ENVIRONMENT VARIABLES

       If the sysfs_dir variable is set in the environment, it will override the default location where  aoe-stat  will  look  for  sysfs,  namely
       /sys.

WARNINGS

       If the minor device number of a device node does not match that of its namesake, aoe-stat will print a warning as shown below.

	      nai:~# aoe-stat
		    e0.3	 0.104GB   eth0 up
		    e0.4      4398.046GB   eth0 up
		   e20.0      1000.215GB   eth0 up
		   e42.0      2000.431GB   eth0 up
	      aoe-stat Warning: device node /dev/etherd/e45.1 has wrong minor device number
		   e45.1      1152.874GB   eth0 up

       Using  such  a  device  node  is dangerous, because its name doesn't match the actual device that you would be reading from and writing to.
       Such a broken device node should be removed.  Device nodes are created by udev or (on systems without udev) by aoe-mkdevs.

EXAMPLE

       In this example, the root user on a host named nai loads the aoe driver module and then prints a list of all  the  available  aoe  devices.
       Then  he  remembers to bring up the storage network interfaces, does an AoE discovery, and prints the list again.  This time the list shows
       all the devices in shelf seven.

	      nai:~# modprobe aoe
	      nai:~# aoe-stat
	      nai:~# ifconfig eth3 up
	      nai:~# aoe-discover
	      nai:~# aoe-stat
		    e0.0     10995.116GB   eth0 up
		    e0.1     10995.116GB   eth0 up
		    e0.2     10995.116GB   eth0 up
		    e1.0      1152.874GB   eth0 up
		    e7.0       370.566GB   eth0 up
	      nai:~#

SEE ALSO

       aoe-discover(8), aoe-interfaces(8), aoe-mkdevs(8), aoe-mkshelf(8), aoetools(8), udev(7).

AUTHOR

       Ed L. Cashin (ecashin@coraid.com)

																       aoe-stat(8)

10 More Discussions You Might Find Interesting

1. UNIX for Dummies Questions & Answers

System Calls

Discussion started by: clickonline1

2. UNIX for Dummies Questions & Answers

Any difference between the CLI of Mac OS X and normal UNIX?

Discussion started by: edward

3. UNIX for Dummies Questions & Answers

System calls for cp and mv

Discussion started by: gaurava99

4. Solaris

System calls ?

Discussion started by: TECHRAMESH