c program to implement the unix or linux command to implement ls -l >outpu

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c program to implement the unix or linux command to
implement
ls -l >output.txt

Question Posted / dangare.mayuri

5 Answers
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c program to implement the unix or linux command to implement ls -l >output.txt..

Answer / rahul magdum

#include sys/types.h
#include unistd.h
#include sys/stat.h

main()
{
Int pid=fork();
Int fd=creat("op.txt",S_IRWXU);
If(pid!=0 && pid!=-1)
{
close(1); // stdout
dup(fd); // replace file descriptor
execlp("ls","ls","-l",null);
close(fd);

}
}

Is This Answer Correct ?

22 Yes

7 No

c program to implement the unix or linux command to implement ls -l >output.txt..

Answer / rucha

read the files in current directory using opendir and
readdir system calls. readdir will return filenames in the
directory. For each entry returned by readdir system call,
use stat system call to read statistics of the file. Stat
system call will give all the info about the file as that
of ls -l command.

Is This Answer Correct ?

17 Yes

4 No

c program to implement the unix or linux command to implement ls -l >output.txt..

Answer / muralidharan

Please use the system function

Itz may be helpful for implement the unix command in c program

syntax : - system("clear");

Is This Answer Correct ?

4 Yes

3 No

c program to implement the unix or linux command to implement ls -l >output.txt..

Answer / gaurav

error in 18 line

Is This Answer Correct ?

1 Yes

0 No

c program to implement the unix or linux command to implement ls -l >output.txt..

Answer / gunjan

#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include <dirent.h>

int main(int argc, char* argv[])
{
DIR *mydir;
struct dirent *myfile;
struct stat mystat;

mydir = opendir(argv[1]);
while((myfile = readdir(mydir)) != NULL)
{
stat(myfile->d_name, &mystat);
printf("%d",mystat.st_size);
printf(" %s
", myfile->d_name);
}
closedir(mydir);
}