Hi Now, I have changed the source code as follows by putting that multiple literals in the system() earlier to an shellscript ./filename.sh now.

But I have confusion how to pass my argv[1] and the value of i as argument to the shell script. To ask simple: How system() call recognize the command line args passed to an C program.

SOURCE CODE:

# include <stdio.h>
# include <stdlib.h>
# include <strings.h>

main(argc,argv)
int argc;
char *argv[];
{
int i;
/*char *cmd,*opt;*/
printf("%d is arg\nc",argc);
printf("arg0 is %s\n",argv[0]);
printf("arg1 is %s\n",argv[1]);

if(argc!=2)
{
printf("usage Wrong");
exit(0);
}

printf("The command you ahve entered is %s\n",argv[1]);
printf("Let us display the various outputs for different options for the command");

i='a';
while(i>='a'&& i<='z')
{
printf("\n option is %d ASCII is %c",i,i);
system("./filename.sh argv[1] i");
i++;
}

}

OUTPUT:

[ramki@lindesk3 ramki]$ cc options_wth_exe_cmds.c -o cmd_opt
[ramki@lindesk3 ramki]$ ./cmd_opt ls
2 is arg
carg0 is ./cmd_opt
arg1 is ls
The command you ahve entered is ls
Let us display the various outputs for different options for the command
cmd is argv[1]
opt is i
./filename.sh: line 3: argv[1]: command not found
option is 97 ASCII is a
cmd is argv[1]
opt is i
./filename.sh: line 3: argv[1]: command not found
option is 98 ASCII is b
cmd is argv[1]
opt is i
./filename.sh: line 3: argv[1]: command not found
option is 99 ASCII is c
cmd is argv[1]
opt is i
./filename.sh: line 3: argv[1]: command not found
option is 100 ASCII is d
cmd is argv[1]
opt is i
./filename.sh: line 3: argv[1]: command not found
option is 101 ASCII is e
cmd is argv[1]
opt is i
./filename.sh: line 3: argv[1]: command not found
option is 102 ASCII is f
cmd is argv[1]
opt is i
./filename.sh: line 3: argv[1]: command not found
option is 103 ASCII is g
cmd is argv[1]
opt is i
./filename.sh: line 3: argv[1]: command not found
option is 104 ASCII is h
cmd is argv[1]
opt is i
./filename.sh: line 3: argv[1]: command not found
option is 105 ASCII is i
cmd is argv[1]
opt is i
./filename.sh: line 3: argv[1]: command not found
option is 106 ASCII is j
cmd is argv[1]
opt is i
./filename.sh: line 3: argv[1]: command not found
option is 107 ASCII is k
cmd is argv[1]
opt is i
./filename.sh: line 3: argv[1]: command not found
option is 108 ASCII is l
cmd is argv[1]
opt is i
./filename.sh: line 3: argv[1]: command not found
option is 109 ASCII is m
cmd is argv[1]
opt is i
./filename.sh: line 3: argv[1]: command not found
option is 110 ASCII is n
cmd is argv[1]
opt is i
./filename.sh: line 3: argv[1]: command not found
option is 111 ASCII is o
cmd is argv[1]
opt is i
./filename.sh: line 3: argv[1]: command not found
option is 112 ASCII is p
cmd is argv[1]
opt is i
./filename.sh: line 3: argv[1]: command not found
option is 113 ASCII is q
cmd is argv[1]
opt is i
./filename.sh: line 3: argv[1]: command not found
option is 114 ASCII is r
cmd is argv[1]
opt is i
./filename.sh: line 3: argv[1]: command not found
option is 115 ASCII is s
cmd is argv[1]
opt is i
./filename.sh: line 3: argv[1]: command not found
option is 116 ASCII is t
cmd is argv[1]
opt is i
./filename.sh: line 3: argv[1]: command not found
option is 117 ASCII is u
cmd is argv[1]
opt is i
./filename.sh: line 3: argv[1]: command not found
option is 118 ASCII is v
cmd is argv[1]
opt is i
./filename.sh: line 3: argv[1]: command not found
option is 119 ASCII is w
cmd is argv[1]
opt is i
./filename.sh: line 3: argv[1]: command not found
option is 120 ASCII is x
cmd is argv[1]
opt is i
./filename.sh: line 3: argv[1]: command not found
option is 121 ASCII is y
cmd is argv[1]
opt is i
./filename.sh: line 3: argv[1]: command not found

Please help me in get rid of these..