static int my_execvpe()

in src/couch_quickjs/quickjs/quickjs-libc.c [2949:3002]

• 49 lines of code
• 11 McCabe index (conditional complexity)

static int my_execvpe(const char *filename, char **argv, char **envp)
{
    char *path, *p, *p_next, *p1;
    char buf[PATH_MAX];
    size_t filename_len, path_len;
    BOOL eacces_error;

    filename_len = strlen(filename);
    if (filename_len == 0) {
        errno = ENOENT;
        return -1;
    }
    if (strchr(filename, '/'))
        return execve(filename, argv, envp);

    path = getenv("PATH");
    if (!path)
        path = (char *)"/bin:/usr/bin";
    eacces_error = FALSE;
    p = path;
    for(p = path; p != NULL; p = p_next) {
        p1 = strchr(p, ':');
        if (!p1) {
            p_next = NULL;
            path_len = strlen(p);
        } else {
            p_next = p1 + 1;
            path_len = p1 - p;
        }
        /* path too long */
        if ((path_len + 1 + filename_len + 1) > PATH_MAX)
            continue;
        memcpy(buf, p, path_len);
        buf[path_len] = '/';
        memcpy(buf + path_len + 1, filename, filename_len);
        buf[path_len + 1 + filename_len] = '\0';

        execve(buf, argv, envp);

        switch(errno) {
        case EACCES:
            eacces_error = TRUE;
            break;
        case ENOENT:
        case ENOTDIR:
            break;
        default:
            return -1;
        }
    }
    if (eacces_error)
        errno = EACCES;
    return -1;
}