Highest Voted 'unistd.h' Questions

191

votes

9 answers

Is there a replacement for unistd.h for Windows (Visual C)?

I'm porting a relatively simple console program written for Unix to the Windows platform (Visual C++ 8.0). All the source files include "unistd.h", which doesn't exist. Removing it, I get complaints about misssing prototypes for 'srandom',…

asked Dec 04 '08 at 19:51

AShelly

32,752
12
84
142

27

votes

2 answers

Cannot open include file: 'unistd.h': No such file or directory

After having installed libpng into my computer, I've included it into my project using #include on a Windows 7 SP1 plateform and using Visual Studio Ultimate 2013. But at build time, I'm getting this error: C1083: Cannot open include file:…

c++ unistd.h

asked Mar 28 '14 at 06:31

user3471387

287
3
7
10

26

votes

2 answers

How to call execl() in C with the proper arguments?

i have vlc (program to reproduce videos) if i type in a shell: /home/vlc "/home/my movies/the movie i want to see.mkv" it opens up an reproduces the movie. however, when I run the following program: #include int main(void) { …

c exec external quotes unistd.h

asked Sep 26 '12 at 07:40

Matias Morant

473
2
5
11

13

votes

3 answers

clang++: fatal error: 'unistd.h' file not found

Using OS X 10.10.2, I download Clang for Mac OS X v. 3.6.0, and try to compile a simple Hello World program. The commands I use are these: (assumes you downloaded clang to .) cd . ./clang+llvm-3.6.0-x86_64-apple-darwin/bin/clang++ main.cpp The…

c++ macos clang llvm unistd.h

asked Mar 30 '15 at 22:42

user4664340

11

votes

3 answers

Fast input/output in competitive programming

I have come across this particular snippet of code many times in solutions of competitive programming contests. I understand the basic use of this code to beat time limits but i want to understand it more deeply. I know that unistd.h gives access to…

c++ posix unistd.h

asked Mar 17 '12 at 11:29

s2n

317
3
9

10

votes

3 answers

C sleep function not working

When including the sleep function from unistd.h the program hangs indefinitely: #include #include int main() { int i; printf("0 "); for(i = 1; i <20; ++i) { sleep(2); …

c sleep unistd.h

asked Nov 26 '12 at 15:54

James Jenkinson

1,358
2
13
32

9

votes

2 answers

What is the difference between fsync and syncfs?

What is the difference between fsync and syncfs ? int syncfs(int fd); int fsync(int fd); The manpage for fync says the following : fsync() transfers ("flushes") all modified in-core data of (i.e., modified buffer cache pages for) the…

c linux filesystems posix unistd.h

asked Jan 09 '18 at 15:45

cominfotty

331
1
4
9

8

votes

1 answer

Difference between unistd.h and sys/types.h in linux

When I have searched for the header unistd.h, in The Open Group, I found that it contains the standard symbolic constants & types and for sys/types.h it said for data types. Then I found that both have uid_t, pid_t and several similar types. I am…

linux unistd.h

asked May 01 '15 at 09:18

user3511557

7

votes

1 answer

execl crashes C++ node.js-addon

As normal C++ execl works fine (compiling with g++ ok.cc -o ok.elf) #include int main(){ execl("/usr/bin/python", "/usr/bin/python", nullptr); } But crashes, when works as node.js C++ addon #include #include…

linux crash node.js-addon unistd.h

asked Nov 22 '17 at 11:41

Евгений Новиков

115
7

6

votes

3 answers

redirecting standard output in c then resetting standard output

I'm trying to use redirects in C to redirect input to one file and then set standard output back to print to the screen. Could someone tell me what's wrong with this code? #include #include #include int main(int argc,…

c fcntl unistd.h

asked Jul 24 '11 at 07:50

David

1,715
5
25
40

5

votes

1 answer

Clock, rdtsc and CLOCKS_PER_SEC

I am trying to implement my own version of clock() using asm and rdtsc. However I am quite unsure about its return value. Is it cycles? Oder is it micro seconds? I am also confused about CLOCKS_PER_SEC. How can this be constant? Is there any kind…

c cpu unistd.h

asked Apr 18 '16 at 14:26

今天春天

861
11
23

5

votes

1 answer

Attempting to use execvpe(...) but get implicit declaration error - even though I think I'm using the correct argument types

I am getting the following warning when I compile: execute.c:20:2: warning: implicit declaration of function ‘execvpe’[-Wimplicit-function-declaration] execvpe("ls", args, envp); ^ My understanding is that this occurs when the function you are…

c linux exec posix unistd.h

asked Jun 29 '15 at 01:37

newbie

549
5
15

4

votes

1 answer

What does libc_hidden_proto in the glibc standard libraries do?

I was trying to look up the prototype for the getpgrp() function in unistd.h but couldnt find it. The only line containing getpgrp in that file was the line libc_hidden_proto (tcgetpgrp) and I'm assuming this is a macro, but I dont know what it…

c glibc unistd.h

asked May 18 '16 at 04:18

Jerry Marbas

165
7

4

votes

0 answers

unistd.h file not found, clang++ and OS X

I'm currently struggling with clang++, and after looking on the web for a long time I decided asking my question. I'm on OS X and using clang++ via Emacs (it's used by flycheck to highlight errors, among other things). I have a very simple file that…

c++ emacs header clang++ unistd.h

asked Nov 19 '15 at 00:40

Maxime Briand

41
1
5

4

votes

1 answer

How am I able to use read() and write() without including "unistd.h"?

I have used syscalls read() and write() in my program WITHOUT including "unistd.h" header file in the program. But still the program works and gives expected results. After running the program, i thought i will read the man page for read() and…

c file-io header-files system-calls unistd.h

asked Feb 16 '15 at 20:38

sps

2,630
1
13
34

Questions tagged [unistd.h]