Are there alternate implementations of GNU getline interface?

Question

The experiment I am currently working uses a software base with a complicated source history and no well defined license. It would be a considerable amount of work to rationalize things and release under a fixed license.

It is also intended to run a a random unixish platform, and only some of the libc's we support have GNU getline, but right now the code expects it.

Does anyone know of a re-implementation of the GNU getline semantics that is available under a less restrictive license?

Edit:: I ask because Google didn't help, and I'd like to avoid writing one if possible (it might be a fun exercise, but it can't be the best use of my time.)

To be more specific, the interface in question is:

ssize_t getline (char **lineptr, size_t *n, FILE *stream);

Answer 1

I'm puzzled.

I looked at the link, read the description, and this is a fine utility.

But, are you saying you simply can't rewrite this function to spec? The spec seems quite clear,

Here:

/* This code is public domain -- Will Hartung 4/9/09 */
#include <stdio.h>
#include <stdlib.h>

size_t getline(char **lineptr, size_t *n, FILE *stream) {
    char *bufptr = NULL;
    char *p = bufptr;
    size_t size;
    int c;

    if (lineptr == NULL) {
        return -1;
    }
    if (stream == NULL) {
        return -1;
    }
    if (n == NULL) {
        return -1;
    }
    bufptr = *lineptr;
    size = *n;

    c = fgetc(stream);
    if (c == EOF) {
        return -1;
    }
    if (bufptr == NULL) {
        bufptr = malloc(128);
        if (bufptr == NULL) {
            return -1;
        }
        size = 128;
    }
    p = bufptr;
    while(c != EOF) {
        if ((p - bufptr) > (size - 1)) {
            size = size + 128;
            bufptr = realloc(bufptr, size);
            if (bufptr == NULL) {
                return -1;
            }
        }
        *p++ = c;
        if (c == '\n') {
            break;
        }
        c = fgetc(stream);
    }

    *p++ = '\0';
    *lineptr = bufptr;
    *n = size;

    return p - bufptr - 1;
}

int main(int argc, char** args) {
    char *buf = NULL; /*malloc(10);*/
    int bufSize = 0; /*10;*/

    printf("%d\n", bufSize);
    int charsRead =  getline(&buf, &bufSize, stdin);

    printf("'%s'", buf);
    printf("%d\n", bufSize);
    return 0;
}

15 minutes, and I haven't written C in 10 years. It minorly breaks the getline contract in that it only checks if the lineptr is NULL, rather than NULL and n == 0. You can fix that if you like. (The other case didn't make a whole lot of sense to me, I guess you could return -1 in that case.)

Replace the '\n' with a variable to implement "getdelim".

Do people still write code any more?