#ifndef lint
static const char *rcsid = "$Id: plist.c,v 1.7 1994/07/11 01:11:14 jkh Exp $";
#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
 *
 * General packing list routines.
 *
 */

#include "lib.h"

/* Add an item to a packing list */
void
add_plist(Package *p, plist_t type, char *arg)
{
    PackingList tmp;

    tmp = new_plist_entry();
    tmp->name = copy_string(arg);
    tmp->type = type;

    if (!p->head)
	p->head = p->tail = tmp;
    else {
	tmp->prev = p->tail;
	p->tail->next = tmp;
	p->tail = tmp;
    }
}

void
add_plist_top(Package *p, plist_t type, char *arg)
{
    PackingList tmp;

    tmp = new_plist_entry();
    tmp->name = copy_string(arg);
    tmp->type = type;

    if (!p->head)
	p->head = p->tail = tmp;
    else {
	tmp->next = p->head;
	p->head->prev = tmp;
	p->head = tmp;
    }
}

/* Return the last (most recent) entry in a packing list */
PackingList
last_plist(Package *p)
{
    return p->tail;
}

/* Mark all items in a packing list to prevent iteration over them */
void
mark_plist(Package *pkg)
{
    PackingList p = pkg->head;

    while (p) {
	p->marked = TRUE;
	p = p->next;
    }
}

/* Find a given item in a packing list and, if so, return it (else NULL) */
PackingList
find_plist(Package *pkg, plist_t type)
{
    PackingList p = pkg->head;

    while (p) {
	if (p->type == type)
	    return p;
	p = p->next;
    }
    return NULL;
}
 
/*
 * Delete plist item 'type' in the list (if 'name' is non-null, match it
 * too.)  If 'all' is set, delete all items, not just the first occurance.
 */
void
delete_plist(Package *pkg, Boolean all, plist_t type, char *name)
{
    PackingList p = pkg->head;

    while (p) {
	PackingList pnext = p->next;

	if (p->type == type && (!name || !strcmp(name, p->name))) {
	    free(p->name);
	    if (p->prev)
		p->prev->next = pnext;
	    else
		pkg->head = pnext;
	    if (pnext)
		pnext->prev = p->prev;
	    else
		pkg->tail = p->prev;
	    free(p);
	    if (!all)
		return;
	    p = pnext;
	}
	else
	    p = p->next;
    }
}
    
/* Allocate a new packing list entry */
PackingList
new_plist_entry(void)
{
    PackingList ret;

    ret = (PackingList)malloc(sizeof(struct _plist));
    bzero(ret, sizeof(struct _plist));
    return ret;
}

/* Free an entire packing list */
void
free_plist(Package *pkg)
{
    PackingList p = pkg->head;

    while (p) {
	PackingList p1 = p->next;

	free(p->name);
	free(p);
	p = p1;
    }
    pkg->head = pkg->tail = NULL;
}

/*
 * For an ascii string denoting a plist command, return its code and
 * optionally its argument(s)
 */
int
plist_cmd(char *s, char **arg)
{
    char cmd[FILENAME_MAX + 20];	/* 20 == fudge for max cmd len */
    char *cp, *sp;

    strcpy(cmd, s);
    str_lowercase(cmd);
    cp = cmd;
    sp = s;
    while (*cp) {
	if (isspace(*cp)) {
	    *cp = '\0';
	    while (isspace(*sp)) /* Never sure if macro, increment later */
		++sp;
	    break;
	}
	++cp, ++sp;
    }
    if (arg)
	*arg = sp;
    if (!strcmp(cmd, "cwd"))
	return PLIST_CWD;
    else if (!strcmp(cmd, "srcdir"))
	return PLIST_SRC;
    else if (!strcmp(cmd, "cd"))
	return PLIST_CWD;
    else if (!strcmp(cmd, "exec"))
	return PLIST_CMD;
    else if (!strcmp(cmd, "unexec"))
	return PLIST_UNEXEC;
    else if (!strcmp(cmd, "mode"))
	return PLIST_CHMOD;
    else if (!strcmp(cmd, "owner"))
	return PLIST_CHOWN;
    else if (!strcmp(cmd, "group"))
	return PLIST_CHGRP;
    else if (!strcmp(cmd, "comment"))
	return PLIST_COMMENT;
    else if (!strcmp(cmd, "ignore"))
	return PLIST_IGNORE;
    else if (!strcmp(cmd, "name"))
	return PLIST_NAME;
    else
	return FAIL;
}

/* Read a packing list from a file */
void
read_plist(Package *pkg, FILE *fp)
{
    char *cp, pline[FILENAME_MAX];
    int cmd;

    while (fgets(pline, FILENAME_MAX, fp)) {
	int len = strlen(pline) - 1;

	while (isspace(pline[len]))
	    pline[len--] = '\0';
	if (len <= 0)
	    continue;
	cp = pline;
	if (pline[0] == CMD_CHAR) {
	    cmd = plist_cmd(pline + 1, &cp);
	    if (cmd == FAIL)
		barf("Bad command '%s'", pline);
	    if (*cp == '\0')
		cp = NULL;
	}
	else
	    cmd = PLIST_FILE; 
	add_plist(pkg, cmd, cp);
    }
}

/* Write a packing list to a file, converting commands to ascii equivs */
void
write_plist(Package *pkg, FILE *fp)
{
    PackingList plist = pkg->head;

    while (plist) {
	switch(plist->type) {
	case PLIST_FILE:
	    fprintf(fp, "%s\n", plist->name);
	    break;

	case PLIST_CWD:
	    fprintf(fp, "%ccwd %s\n", CMD_CHAR, plist->name);
	    break;

	case PLIST_SRC:
	    fprintf(fp, "%csrcdir %s\n", CMD_CHAR, plist->name);
	    break;

	case PLIST_CMD:
	    fprintf(fp, "%cexec %s\n", CMD_CHAR, plist->name);
	    break;

	case PLIST_UNEXEC:
	    fprintf(fp, "%cunexec %s\n", CMD_CHAR, plist->name);
	    break;

	case PLIST_CHMOD:
	    fprintf(fp, "%cmode %s\n", CMD_CHAR,
		    plist->name ? plist->name : "");
	    break;

	case PLIST_CHOWN:
	    fprintf(fp, "%cowner %s\n", CMD_CHAR,
		    plist->name ? plist->name : "");
	    break;

	case PLIST_CHGRP:
	    fprintf(fp, "%cgroup %s\n", CMD_CHAR,
		    plist->name ? plist->name : "");
	    break;

	case PLIST_COMMENT:
	    fprintf(fp, "%ccomment %s\n", CMD_CHAR, plist->name);
	    break;

	case PLIST_IGNORE:
	    fprintf(fp, "%cignore\n", CMD_CHAR);
	    break;

	case PLIST_NAME:
	    fprintf(fp, "%cname %s\n", CMD_CHAR, plist->name);
	    break;

	default:
	    barf("Unknown command type %d (%s)\n", plist->type, plist->name);
	    break;
	}
	plist = plist->next;
    }
}

/* Delete the results of a package installation, not the packaging itself */
void
delete_package(Boolean ign_err, Package *pkg)
{
    PackingList p = pkg->head;
    char *Where = ".", *last_file = "";

    while (p) {
	if (p->type == PLIST_CWD) {
	    Where = p->name;
	    if (Verbose)
		printf("(CWD to %s)\n", Where);
	}
	else if (p->type == PLIST_UNEXEC) {
	    char cmd[FILENAME_MAX];

	    format_cmd(cmd, p->name, Where, last_file);
	    if (Verbose)
		printf("unexec command: %s\n", cmd);
	    if (!Fake && system(cmd))
		whinge("unexec '%s' failed.", cmd);
	}
	else if (p->type == PLIST_IGNORE)
	    p = p->next;
	else if (p->type == PLIST_FILE) {
	    char full_name[FILENAME_MAX];

	    sprintf(full_name, "%s/%s", Where, p->name);
	    if (Verbose)
		printf("Delete: %s\n", full_name);
	    
	    if (!Fake && delete_hierarchy(full_name, ign_err))
		whinge("Unable to completely remove file '%s'", full_name);
	    last_file = p->name;
	}
	p = p->next;
    }
}

/* Selectively delete a hierarchy */
int
delete_hierarchy(char *dir, Boolean ign_err)
{
    char *cp1, *cp2;
    
    cp1 = cp2 = dir;
    if (vsystem("%s -r%s %s", REMOVE_CMD, (ign_err ? "f" : ""), dir))
	return 1;
    while (cp2) {
	if ((cp2 = rindex(cp1, '/')) != NULL)
	    *cp2 = '\0';
	if (!isempty(dir))
	    return 0;
	if (vsystem("%s %s", RMDIR_CMD, dir) && ign_err)
	    return 1;
	/* Put it back */
	if (cp2) {
	    *cp2 = '/';
	    cp1 = cp2 - 1;
	}
    }
    return 0;
}