/*	$NetBSD: pl.c,v 1.29 2003/10/04 00:50:34 wiz Exp $	*/

#include <sys/cdefs.h>
#ifndef lint
#if 0
static const char *rcsid = "from FreeBSD Id: pl.c,v 1.11 1997/10/08 07:46:35 charnier Exp";
#else
__RCSID("$NetBSD: pl.c,v 1.29 2003/10/04 00:50:34 wiz Exp $");
#endif
#endif

/*
 * FreeBSD install - a package for the installation and maintainance
 * of non-core utilities.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * Jordan K. Hubbard
 * 18 July 1993
 *
 * Routines for dealing with the packing list.
 *
 */

#include "lib.h"
#include "create.h"
#include <err.h>
#include <md5.h>

/*
 * Check that any symbolic link is relative to the prefix
 */
static void
CheckSymlink(char *name, char *prefix, size_t prefixcc)
{
	char    newtgt[MAXPATHLEN];
	char    oldtgt[MAXPATHLEN];
	char   *slash;
	int     slashc;
	int     cc;
	int     i;

	if ((cc = readlink(name, oldtgt, sizeof(oldtgt) - 1)) > 0) {
		oldtgt[cc] = 0;
		if (strncmp(oldtgt, prefix, prefixcc) == 0 && oldtgt[prefixcc] == '/') {
			for (slashc = 0, slash = &name[prefixcc + 1]; (slash = strchr(slash, '/')) != (char *) NULL; slash++, slashc++) {
			}
			for (cc = i = 0; i < slashc; i++) {
				strlcpy(&newtgt[cc], "../", sizeof(newtgt) - cc);
				cc += 3;
			}
			strlcpy(&newtgt[cc], &oldtgt[prefixcc + 1], sizeof(newtgt) - cc);
			(void) fprintf(stderr, "Full pathname symlink `%s' is target of `%s' - adjusting to `%s'\n", oldtgt, name, newtgt);
			if (unlink(name) != 0) {
				warn("can't unlink `%s'", name);
			} else if (symlink(newtgt, name) != 0) {
				warn("can't symlink `%s' called `%s'", newtgt, name);
			}
		}
	}
}

/*
 * (Reversed) comparison routine for directory name sorting
 */
static int
dircmp(const void *vp1, const void *vp2)
{
	return strcmp((const char *) vp2, (const char *) vp1);
}

/*
 * Re-order the PLIST_DIR_RM entries into reverse alphabetic order
 */
static void
reorder(package_t *pkg, int dirc)
{
	plist_t *p;
	char  **dirv;
	int     i;

	if ((dirv = (char **) calloc(dirc, sizeof(char *))) == (char **) NULL) {
		warn("No directory re-ordering will be done");
	} else {
		for (p = pkg->head, i = 0; p; p = p->next) {
			if (p->type == PLIST_DIR_RM) {
				dirv[i++] = p->name;
			}
		}
		qsort(dirv, dirc, sizeof(char *), dircmp);
		for (p = pkg->head, i = 0; p; p = p->next) {
			if (p->type == PLIST_DIR_RM) {
				p->name = dirv[i++];
			}
		}
		(void) free(dirv);
	}
}

/*
 * Check a list for files that require preconversion
 */
void
check_list(char *home, package_t *pkg, const char *PkgName)
{
	struct stat st;
	plist_t *tmp;
	plist_t *p;
	char    name[FILENAME_MAX];
	char    buf[ChecksumHeaderLen + LegibleChecksumLen];
	char   *cwd = home;
	char   *srcdir = NULL;
	int     dirc;

	/* Open Package Database for writing */
	if (update_pkgdb && !pkgdb_open(ReadWrite)) {
		cleanup(0);
		err(EXIT_FAILURE, "can't open pkgdb");
	}

	for (dirc = 0, p = pkg->head; p; p = p->next) {
		switch (p->type) {
		case PLIST_CWD:
			cwd = p->name;
			break;
		case PLIST_IGNORE:
			p = p->next;
			break;
		case PLIST_SRC:
			srcdir = p->name;
			break;
		case PLIST_DIR_RM:
			dirc++;
			break;
		case PLIST_FILE:
			/*
			 * pkgdb handling - usually, we enter files
			 * into the pkgdb as soon as they hit the disk,
			 * but as they are present before pkg_create
			 * starts, it's ok to do this somewhere here
			 */
			if (update_pkgdb) {
				char   *s, t[FILENAME_MAX];

				(void) snprintf(t, sizeof(t), "%s%s%s",
					cwd,
					(strcmp(cwd, "/") == 0) ? "" : "/",
					p->name);

				s = pkgdb_retrieve(t);
#ifdef PKGDB_DEBUG
				fprintf(stderr, "pkgdb_retrieve(\"%s\")=\"%s\"\n", t, s);	/* pkgdb-debug - HF */
#endif
				if (s && PlistOnly)
					warnx("Overwriting %s - "
					    "pkg %s bogus/conflicting?", t, s);
				else {
					pkgdb_store(t, PkgName);
#ifdef PKGDB_DEBUG
					fprintf(stderr, "pkgdb_store(\"%s\", \"%s\")\n", t, PkgName);	/* pkgdb-debug - HF */
#endif
				}
			}

			if (cwd == home) {
				/* no @cwd yet */
				(void) snprintf(name, sizeof(name), "%s/%s", srcdir ? srcdir : cwd, p->name);
			} else {
				/* after @cwd */
				/* prepend DESTDIR if set?  - HF */
				(void) snprintf(name, sizeof(name), "%s%s%s",
					cwd,
					(strcmp(cwd, "/") == 0) ? "" : "/",
					p->name);
			}
			if (lstat(name, &st) < 0) {
				warnx("can't stat `%s'", name);
				continue;
			}
			switch (st.st_mode & S_IFMT) {
			case S_IFDIR:
				p->type = PLIST_DIR_RM;
				dirc++;
				continue;
			case S_IFLNK:
				if (RelativeLinks) {
					CheckSymlink(name, cwd, strlen(cwd));
				}
				break;
			case S_IFCHR:
				warnx("Warning - char special device `%s' in PLIST", name);
				break;
			case S_IFBLK:
				warnx("Warning - block special device `%s' in PLIST", name);
				break;
			default:
				(void) strlcpy(buf, CHECKSUM_HEADER,
				    sizeof(buf));
				if (MD5File(name, &buf[ChecksumHeaderLen]) != (char *) NULL) {
					tmp = new_plist_entry();
					tmp->name = strdup(buf);
					tmp->type = PLIST_COMMENT;	/* PLIST_MD5 - HF */
					tmp->next = p->next;
					tmp->prev = p;
					if (p == pkg->tail) {
						pkg->tail = tmp;
					}
					p->next = tmp;
					p = tmp;
				}
				break;
			}
			break;
		default:
			break;
		}
	}

	if (update_pkgdb) {
		pkgdb_close();
	}

	if (ReorderDirs && dirc > 0) {
		reorder(pkg, dirc);
	}
}