Login or Register to Ask a Question and Join Our Community


Programming

lseek in c

Login to Discuss or Reply to this Discussion in Our Community

 
Thread Tools Search this Thread
Top Forums Programming lseek in c
# 1  
Old 05-24-2005
lseek in c
sir,

i used lssek as this

lseek(fp,-10,2);

i am not getting any output i dont now why can you explan sir..


Thanks in advance,
Arunkumar
# 2  
Old 05-24-2005
Is this related to any academic project ?
# 3  
Old 05-24-2005
hi vino
No obvoiusly not can you explain]
# 4  
Old 05-24-2005
lseek is not intended to produce output.
# 5  
Old 05-24-2005
lseek returns the offset into the file in bytes.
After you call lseek you then have to read the file with fgets() or fread() then printf() the result to get "output"
Login or Register to Ask a Question

Previous Thread | Next Thread

7 More Discussions You Might Find Interesting

1. Programming

Problem with lseek call.

The following code: int fd; if (fd = open("mem", O_RDONLY) == -1) return 1; if (lseek(fd, 0, SEEK_SET) == -1) { char *buf = malloc(512); buf = strerror(errno); printf("%s\n", buf); return 1; } always returns with "illegal seek"... (2 Replies)
Discussion started by: Sir_Tomasz
2 Replies

2. AIX

Backup: The lseek call failed

Hi, We are facing issues while backing up our 1205 GB filesystem on LTO5 Tape. During backup the "backup: The lseek call failed." messages were generated, I want to know why these messages were generating AIX version is: 6100-08-00-0000 backup: The date of this level 0 backup is Mon Mar 11... (4 Replies)
Discussion started by: m_raheelahmed
4 Replies

3. Programming

what is the main difference between difference between using nonatomic lseek and O_APPEND

I think both write at the end of the file ...... but is there a sharp difference between those 2 instruction ..... thank you this is my 3rd question today forgive me :D (1 Reply)
Discussion started by: fwrlfo
1 Replies

4. UNIX for Dummies Questions & Answers

Understanding lseek

I tried to use lseek system call to determine the number of bytes in a file. To do so, I used open system call with O_APPEND flag to open a file. As lseek returns the current offset so I called lseek for opened file with offset as zero and whence as SEEK_CUR. So I guess it must return the number of... (3 Replies)
Discussion started by: Deepak Raj
3 Replies

5. UNIX for Dummies Questions & Answers

Lseek implementation

Hi everybody, i've been googling for ages now and gotten kinda desperate... The question, however, might be rather trivial for the experts: What is it exactly, i.e. physically, the POSIX function (for a file) "lseek" does? Does it trigger some kind of synchronization on disk? Is it just for the... (4 Replies)
Discussion started by: Humudituu
4 Replies

6. UNIX for Dummies Questions & Answers

lseek() equivalent

I know there is lseek() function that will allow to write or read from certain position in the file. Is there similar function that will let do same but for array rather then file? (9 Replies)
Discussion started by: joker40
9 Replies

7. Programming

Hairy Problem! lseek over 4G

recently my project needs me to lseek a position over 4G size.... i found in linux or unix the parameters are all ulong 32 bits...the limit dooms the movement of a position over 4G I was told that i should lseek64 to meet my need... but i have no idea where i can get the function neither by "man... (8 Replies)
Discussion started by: macroideal
8 Replies
Login or Register to Ask a Question