lib/mkdirp.c


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// borrowed from https://gist.github.com/JonathonReinhart/8c0d90191c38af2dcadb102c4e202950

#include <string.h>
#include <limits.h>     /* PATH_MAX */
#include <sys/stat.h>   /* mkdir(2) */
#include <errno.h>
#ifndef PATH_MAX
#define PATH_MAX 255
#endif
int mkdir_p(const char *path) {
    /* Adapted from http://stackoverflow.com/a/2336245/119527 */
    const size_t len = strlen(path);
    char _path[PATH_MAX];
    char *p; 

    errno = 0;

    /* Copy string so its mutable */
    if (len > sizeof(_path)-1) {
        errno = ENAMETOOLONG;
        return -1; 
    }   
    strcpy(_path, path);

    /* Iterate the string */
    for (p = _path + 1; *p; p++) {
        if (*p == '/') {
            /* Temporarily truncate */
            *p = '\0';

            if (mkdir(_path, S_IRWXU) != 0) {
                if (errno != EEXIST)
                    return -1; 
            }

            *p = '/';
        }
    }   

    if (mkdir(_path, S_IRWXU) != 0) {
        if (errno != EEXIST)
            return -1; 
    }   

    return 0;
}