Programming

$ cat getsecsal.c

#include <stdio.h>
#include <string.h>

int main(void)
{
        char buf[16384];
        char section[16384];

        while(fgets(buf, 16384, stdin))
        {
                char *substr;
                if(substr=strstr(buf,"<Section>"))
                {
                        substr += strlen("<Section>");
                        char *end=strstr(substr, "</ Section>");
                        if(end) (*end)='\0';
                        strcpy(section, substr);
                }
                else if(substr=strstr(buf,"<Salary>"))
                {
                        substr += strlen("<Salary>");
                        char *end=strstr(substr, "</Salary>");
                        if(end) (*end)='\0';

                        printf("%s~%s\n", section, substr);
                }
        }
}

$ gcc getsecsal.c
$ ls -lh data[12]
-rw-r--r-- 1 tyler users 1.7G Nov 23 15:57 data1
-rw-r--r-- 1 tyler users  208 Nov 23 15:57 data2
$ cat data2

<EMPLOYEE>
<RECORD id =XYZ >
<SSN>123</SSN>
<Section>dfdf</ Section>
<Salary>34343</Salary>
</RECORD>
<RECORD id =XZY >
< SSN >321</ SSN >
<Section>dfd</ Section>
<Salary>34343</Salary>
</RECORD>
</EMPLOYEE>

$ ./a.out < data2
dfdf~34343
dfd~34343

$ time ./a.out < data1 > /dev/null

real    0m46.661s
user    0m42.820s
sys     0m2.221s

$