/*	$NetBSD: pl.c,v 1.11 1999/03/02 10:32:23 agc 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 1.11 1999/03/02 10:32:23 agc 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))) > 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++) {
				strnncpy(&newtgt[cc], sizeof(newtgt) - cc, "../", 3);
				cc += 3;
			}
			strnncpy(&newtgt[cc], sizeof(newtgt) - cc, &oldtgt[prefixcc + 1], strlen(&oldtgt[prefixcc + 1]));
			(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(vp2, 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 (pkgdb_open(0) == -1) {
	    cleanup(0);
	    err(1, "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 
			 */
			{
			    char *s, t[FILENAME_MAX], *u;
			    
			    if (p->name[0] == '/')
				u=p->name;
			    else {
				snprintf(t, FILENAME_MAX, "%s/%s", cwd, p->name);
				u=t;
			    }
			    
			    s=pkgdb_retrieve(u);
#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
			    }
			}

			(void) snprintf(name, sizeof(name), "%s/%s", srcdir ? srcdir : cwd, 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:
				break;
			}
			(void) strcpy(buf, CHECKSUM_HEADER);
			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;
				p->next = tmp;
				p = tmp;
			}
			break;
		default:
			break;
		}
	}

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