Sponsored Content
Top Forums Programming Copy a file using UNIX-system calls Post 302300892 by jim mcnamara on Wednesday 25th of March 2009 10:07:01 AM
Old 03-25-2009
read returns 0 on EOF, -1 on error. EOF is not an error.
 

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 Replies)
Discussion started by: clickonline1
2 Replies

2. UNIX for Dummies Questions & Answers

System calls for cp and mv

Which system calls are made for operations cp and mv (2 Replies)
Discussion started by: gaurava99
2 Replies

3. UNIX for Dummies Questions & Answers

System calls?

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)
Discussion started by: PlunderBunny
2 Replies

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? (1 Reply)
Discussion started by: TECHRAMESH
1 Replies

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... (1 Reply)
Discussion started by: ilavenil
1 Replies

6. 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.:) (2 Replies)
Discussion started by: vishwasrao
2 Replies

7. 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() (2 Replies)
Discussion started by: l flipboi l
2 Replies

8. UNIX for Dummies Questions & Answers

Unix directory system calls question

I'm currently studying for my exam, and is practicing with sample exam questions. However there is a question asking "Name THREE UNIX Directory system calls" and the answer given is "opendir, closedir and readdir", however the next question ask "Why is a write directory system call not included... (1 Reply)
Discussion started by: Izzy123
1 Replies

9. UNIX for Dummies Questions & Answers

How to Export Glance "Global System Calls" data to a file

Hello... I'm trying to setup a cronjob to record system data using glance at certain times of the day. My question is, how would one export the "Global System Calls" information to a file? Below is the command I have been using and it works to export CPU information. glance -f ... (0 Replies)
Discussion started by: fumus
0 Replies

10. UNIX for Dummies Questions & Answers

System calls in UNIX

Hi i am very new to programming in UNIX and don't understand the difference between a system call and a normal function call. Also can I implement system calls from within a program? If so could someone please give me an example of a system call from within a program. Lastly, when creating a... (1 Reply)
Discussion started by: bjhum33
1 Replies
GETC(3S)																  GETC(3S)

NAME
getc, getchar, fgetc, getw - get character or word from stream SYNOPSIS
#include <stdio.h> int getc(stream) FILE *stream; int getchar() int fgetc(stream) FILE *stream; int getw(stream) FILE *stream; DESCRIPTION
Getc returns the next character from the named input stream. Getchar() is identical to getc(stdin). Fgetc behaves like getc, but is a genuine function, not a macro; it may be used to save object text. Getw returns the next int (a 32-bit integer on a VAX-11) from the named input stream. It returns the constant EOF upon end of file or error, but since that is a good integer value, feof and ferror(3S) should be used to check the success of getw. Getw assumes no special alignment in the file. SEE ALSO
clearerr(3S), fopen(3S), putc(3S), gets(3S), scanf(3S), fread(3S), ungetc(3S) DIAGNOSTICS
These functions return the integer constant EOF at end of file, upon read error, or if an attempt is made to read a file not opened by fopen. The end-of-file condition is remembered, even on a terminal, and all subsequent attempts to read will return EOF until the condi- tion is cleared with clearerr(3S). BUGS
Because it is implemented as a macro, getc treats a stream argument with side effects incorrectly. In particular, `getc(*f++);' doesn't work sensibly. 7th Edition May 14, 1986 GETC(3S)
All times are GMT -4. The time now is 08:43 AM.
Unix & Linux Forums Content Copyright 1993-2022. All Rights Reserved.
Privacy Policy