If you want to execute shell command from within your application.
Here is the solution.
The Shell command can be executed from within your C or C++ program in two ways
1. Using "system(...)" function
#include <iostream>
int main( int argc, const char * argv[] )
{
char
command[] = "ls";
int
status = system( command );
return
0;
}
The only disadvantage of this method is you cannot track
or read the result of command. The output will be seen on
terminal.
The return value of system() will just represent whether
command executed successfully or not
status == 0 -> Successful
status != 0 -> Unsuccessful
2. Using popen(...), pclose(...)
Problem of reading from shell can be resolved with use of
popen and pclose.
#include
<stdio.h>
FILE
*popen(const char *command,
const char *mode);
The popen(...) function will execute the shell command
specified in variable command and it will create a pipe
between the launching program and the executed
command.
Also will return a pointer to a stream which can be read
from or write to the pipe.
#include <iostream>
int main( int argc, const char * argv[] )
{
FILE * fp ;
char tstCommand[] ="ls
*";
char path[PATH_MAX];
fp = popen(tstCommand,
"r");
while ( fgets( path, PATH_MAX, fp ) != NULL )
cout <<
path << endl
pclose(fp);
return 0;
}
Tags:
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