I am writing a
C program which determines the number of bytes read from the standard input . I
found out there are ways to give input to the program
piped input
redirection
entering into command line while the program is waiting for input
How to find the exact command by which the program was executed from the shell .
I tried using command-line arguments but failed .
#include <stdio.h>
int main(int argc,char *argv[])
{
char buffer[100];
int n;
for(n=1;n<argc;n++)
printf("argument: %s\t",argv[n]);
printf("\n");
if(argc==1)
printf("waiting for input :");
else if (argc==3)
printf("Not waiting for input . Got the source from command itself .");
n = read(0,buffer,100);
if(n==-1)
printf("\nError occured in reading");
printf("\nReading successfully done\n");
return 0;
}
Also ,
