dir.c

/*
 * Copyright (c) 2009 - 2011 Miek Gieben
 * See LICENSE for the license
 * make a dir writable and later remove that
 * right again
 */

#include "rdup-up.h"

struct stat *
dir_write(gchar *p)
{
	 /* chmod +w . && rm $file && chmod -w # and hope for the best */
	if (!p)
		return NULL;

	struct stat *s = g_malloc(sizeof(struct stat));
#ifdef DEBUG
	msgd(__func__, __LINE__,_("Making directory writable `%s\'"), p);
#endif /* DEBUG */

	if (stat(p, s) == -1)
		return NULL;

	/* make it writable, assume we are the OWNER */
	if (chmod(p, s->st_mode | S_IWUSR) == -1) {
		msgd(__func__, __LINE__,_("Failed to make directory writeable `%s\': %s"), p, strerror(errno));
	}
	return s;
}

void
dir_restore(gchar *p, struct stat *s)
{
	if (!s || !p)
		return;
	/* restore perms - assumes *s has not be f*cked up */
	if (chmod(p, s->st_mode & 07777) == -1) {
		msgd(__func__, __LINE__,_("Failed to restore permissions `%s\': %s"), p, strerror(errno));
	}
}

/**
 * return parent dir string
 * p MUST not end in a /
 */
gchar *
dir_parent(gchar *p)
{
	gchar *p2;
	gchar *n;
	gchar *copy;

	if (!p)
		return NULL;

	if (p[0] == '/' && p[1] == '\0')
		return p;

	copy = g_strdup(p);
	n = strrchr(copy, '/');
	if (n) {
		*(n+1) = '\0';
		p2 = g_strdup(copy);
		g_free(copy);
		*n= '/';
		return p2;
	}
	return NULL;
}