POSIX regex in C is not working

I want to match every thing in between two words GET and HTTP. I tried every开发者_如何学编程 thing I know. But it is not working. Any help appreciated. The pattern GET.*HTTP should match GET www.google.com HTTP.

Here is the code

Headers:

#include <sys/types.h>
#include <regex.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

Main:

int main(int argc, char *argv[]) {
    regex_t regex;
    int reti;
    char msgbuf[100];
    regmatch_t pmatch[1];

    /* Compile regular expression */
    reti = regcomp(&regex, "GET.*HTTP", REG_EXTENDED);
    if (reti) {
        fprintf(stderr, "Could not compile regex\n");
        exit(1);
    }

    /* Execute regular expression */
    reti = regexec(&regex, argv[1], 1, pmatch, 0);

    if (!reti) {
        puts("Match");
        char *match = strndup(argv[1] + pmatch[0].rm_so, pmatch[0].rm_eo - pmatch[0].rm_so);

        printf("%s\n",match);
    } else if (reti == REG_NOMATCH) {
        puts("No match");
    } else {
        regerror(reti, &regex, msgbuf, sizeof(msgbuf));
        fprintf(stderr, "Regex match failed: %s\n", msgbuf);
        exit(1);
    }

    /* Free compiled regular expression if you want to use the regex_t again */
    regfree(&regex);

    return 0;
}

Is there any thing I'm doing wrong here.

Looks like my comment was the answer...

The problem is that the command line argument was chopped into 3 strings, making argv[1] pointing to GET only.

To pass the entire string to the program, you must use double quotes:

$ ./regex GET www.google.com HTTP
No match
$ ./regex "GET www.google.com HTTP"
Match
GET www.google.com HTTP
$