|
|
Sponsored Content
Top Forums
Programming
file pointer
Post 98330 by linuxpenguin on Tuesday 7th of February 2006 11:57:24 AM
02-07-2006
|
|
10 More Discussions You Might Find Interesting
1. Programming
void main()
{
int a={1,2,3,4,5,6,7,8,9,10};
int *p=a;
int *q=&a;
cout<<q-p+1<<endl;
}
The output is 10, how?
if we give cout<<q it will print the address, value won't print....
if we give cout<<p it will print the address, value won't print....
p has the base addr; q... (1 Reply)
Discussion started by: sarwan
1 Replies
2. Programming
what is the difference between a file pointer and a file descriptor. (1 Reply)
Discussion started by: bankpro
1 Replies
3. UNIX for Dummies Questions & Answers
Hi everybody,
i am newbie to unix and confused with file pointers and file descripters.
could anyone help me to clear my doubts ..
when we call unix system calls to create a file then we are dealing wih file descripters
i think file descripters are also normals file as stored inhard disks... (1 Reply)
Discussion started by: johnray31
1 Replies
4. Programming
can u tell me the reson that why we should not delete a pointer twice.?
if we delete ponter twice then what happen and why this happen
Regards,
Amit (2 Replies)
Discussion started by: amitpansuria
2 Replies
5. Programming
what is far pointer in C (1 Reply)
Discussion started by: useless79
1 Replies
6. Shell Programming and Scripting
I have a text file that has blocks of text. Each block starts with ### and ends with End_###.
I wrote a perl script to search a string from line 2 (ignore any line starts with ###) of each block
if matched, need to print that whole block. According to the input file in below, it will print... (5 Replies)
Discussion started by: tqlam
5 Replies
7. Programming
Hello experts,
I ve a text file I want to go to particular line . what is the best way to do this in c ?
I am tried as follows
fseek ( fh, pos, SEEK_SET);
but this functions moves the file pointer according to a number of bytes. Unfortunately I don't know the exact byte... (7 Replies)
Discussion started by: user_prady
7 Replies
8. Programming
If one wants to get a start address of a array or a string or a block of memory via a function, there are at least two methods to achieve it:
(1) one is to pass a pointer-to-pointer parameter, like:
int my_malloc(int size, char **pmem)
{
*pmem=(char *)malloc(size);
if(*pmem==NULL)... (11 Replies)
Discussion started by: aaronwong
11 Replies
9. UNIX for Dummies Questions & Answers
hi....,
can anyone tell me what is the exact difference between file descriptor and file pointer...... and why file descriptor takes integer value???:confused: (10 Replies)
Discussion started by: jimmyuk
10 Replies
10. Programming
if i declare both but don't input any variables what values will the int array and file pointer array have on default, and if i want to reset any of the elements of both arrays to default, should i just set it to 0 or NULL or what? (1 Reply)
Discussion started by: omega666
1 Replies
LEARN ABOUT POSIX
systemd-suspend.service
SYSTEMD-SUSPEND.SERVICE(8) systemd-suspend.service SYSTEMD-SUSPEND.SERVICE(8) NAME
systemd-suspend.service, systemd-hibernate.service, systemd-hybrid-sleep.service, systemd-suspend-then-hibernate.service, systemd-sleep - System sleep state logic SYNOPSIS
systemd-suspend.service systemd-hibernate.service systemd-hybrid-sleep.service systemd-suspend-then-hibernate.service /lib/systemd/system-sleep DESCRIPTION
systemd-suspend.service is a system service that is pulled in by suspend.target and is responsible for the actual system suspend. Similarly, systemd-hibernate.service is pulled in by hibernate.target to execute the actual hibernation. Finally, systemd-hybrid-sleep.service is pulled in by hybrid-sleep.target to execute hybrid hibernation with system suspend and pulled in by suspend-then-hibernate.target to execute system suspend with a timeout that will activate hibernate later. Immediately before entering system suspend and/or hibernation systemd-suspend.service (and the other mentioned units, respectively) will run all executables in /lib/systemd/system-sleep/ and pass two arguments to them. The first argument will be "pre", the second either "suspend", "hibernate", "hybrid-sleep", or "suspend-then-hibernate" depending on the chosen action. Immediately after leaving system suspend and/or hibernation the same executables are run, but the first argument is now "post". All executables in this directory are executed in parallel, and execution of the action is not continued until all executables have finished. Note that scripts or binaries dropped in /lib/systemd/system-sleep/ are intended for local use only and should be considered hacks. If applications want to react to system suspend/hibernation and resume, they should rather use the Inhibitor interface[1]. Note that systemd-suspend.service, systemd-hibernate.service, and systemd-hybrid-sleep.service systemd-suspend-then-hibernate.service should never be executed directly. Instead, trigger system sleep states with a command such as "systemctl suspend" or similar. Internally, this service will echo a string like "mem" into /sys/power/state, to trigger the actual system suspend. What exactly is written where can be configured in the "[Sleep]" section of /etc/systemd/sleep.conf or a sleep.conf.d file. See systemd-sleep.conf(5). OPTIONS
systemd-sleep understands the following commands: -h, --help Print a short help text and exit. --version Print a short version string and exit. suspend, hibernate, hybrid-sleep, suspend-then-hibernate Suspend, hibernate, suspend then hibernate, or put the system to hybrid sleep. SEE ALSO
systemd-sleep.conf(5), systemd(1), systemctl(1), systemd.special(7), systemd-halt.service(8) NOTES
1. Inhibitor interface https://www.freedesktop.org/wiki/Software/systemd/inhibit systemd 237 SYSTEMD-SUSPEND.SERVICE(8)