abspath.c

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#include "cache.h"

static const char *get_pwd_cwd(void)
{
    static char cwd[PATH_MAX + 1];
    char *pwd;
    struct stat cwd_stat, pwd_stat;
    if (getcwd(cwd, PATH_MAX) == NULL)
        return NULL;
    pwd = getenv("PWD");
    if (pwd && strcmp(pwd, cwd)) {
        stat(cwd, &cwd_stat);
        if (!stat(pwd, &pwd_stat) &&
            pwd_stat.st_dev == cwd_stat.st_dev &&
            pwd_stat.st_ino == cwd_stat.st_ino) {
            strlcpy(cwd, pwd, PATH_MAX);
        }
    }
    return cwd;
}

const char *make_nonrelative_path(const char *path)
{
    static char buf[PATH_MAX + 1];

    if (is_absolute_path(path)) {
        if (strlcpy(buf, path, PATH_MAX) >= PATH_MAX)
            die("Too long path: %.*s", 60, path);
    } else {
        const char *cwd = get_pwd_cwd();
        if (!cwd)
            die("Cannot determine the current working directory");
        if (snprintf(buf, PATH_MAX, "%s/%s", cwd, path) >= PATH_MAX)
            die("Too long path: %.*s", 60, path);
    }
    return buf;
}