#ifndef lint
static const char *rcsid = "$Id: perform.c,v 1.15 1995/04/10 08:01:44 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
 *
 * This is the main body of the add module.
 *
 */

#include "lib.h"
#include "add.h"

#include <signal.h>
#include <sys/wait.h>

static int pkg_do(char *);
static int sanity_check(char *);
static char LogDir[FILENAME_MAX];


int
pkg_perform(char **pkgs)
{
    int i, err_cnt = 0;

    signal(SIGINT, cleanup);
    signal(SIGHUP, cleanup);

    if (AddMode == SLAVE)
	err_cnt = pkg_do(NULL);
    else {
	for (i = 0; pkgs[i]; i++)
	    err_cnt += pkg_do(pkgs[i]);
    }
    return err_cnt;
}

static Package Plist;

/* This is seriously ugly code following.  Written very fast! */
static int
pkg_do(char *pkg)
{
    char pkg_fullname[FILENAME_MAX];
    char home[FILENAME_MAX];
    char *tmp;
    FILE *cfile;
    int code = 0;
    PackingList p;
    struct stat sb;

    /* Reset some state */
    if (Plist.head)
	free_plist(&Plist);
    LogDir[0] = '\0';
    if (AddMode == SLAVE) {
	char tmp_dir[FILENAME_MAX];

	fgets(tmp_dir, FILENAME_MAX, stdin);
	tmp_dir[strlen(tmp_dir) - 1] = '\0'; /* pesky newline! */
	if (chdir(tmp_dir) == FAIL) {
	    whinge("pkg_add in SLAVE mode can't chdir to %s.", tmp_dir);
	    return 1;
	}
	read_plist(&Plist, stdin);
    }
    else {
	if (!getcwd(home, FILENAME_MAX))
	    upchuck("getcwd"); 

	if (pkg[0] == '/')	/* full pathname? */
	    strcpy(pkg_fullname, pkg);
	else
	    sprintf(pkg_fullname, "%s/%s", home, pkg);
	if (!fexists(pkg_fullname)) {
	    whinge("Can't find package '%s'.", pkg_fullname);
	    return 1;
	}
	/*
	 * Apply a crude heuristic to see how much space the package will
	 * take up once it's unpacked.  I've noticed that most packages
	 * compress an average of 75%, so multiply by 4 for good measure.
	 */
	if (stat(pkg_fullname, &sb) == FAIL) {
	    whinge("Can't stat package file '%s'.", pkg_fullname);
	    return 1;
	}
	sb.st_size *= 4;
	Home = make_playpen(PlayPen, sb.st_size);
	if (unpack(pkg_fullname, NULL))
	    return 1;

	if (sanity_check(pkg_fullname))
	    return 1;

	cfile = fopen(CONTENTS_FNAME, "r");
	if (!cfile) {
	    whinge("Unable to open %s file.", CONTENTS_FNAME);
	    goto fail;
	}
	read_plist(&Plist, cfile);
	fclose(cfile);
	if (Prefix) {
	    /*
	     * If we have a prefix, delete the first one we see and add this
	     * one in place of it.
	     */
	    delete_plist(&Plist, FALSE, PLIST_CWD, NULL);
	    add_plist_top(&Plist, PLIST_CWD, Prefix);
	}
	/* If we're running in MASTER mode, just output the plist and return */
	if (AddMode == MASTER) {
	    printf("%s\n", where_playpen());
	    write_plist(&Plist, stdout);
	    return 0;
	}
    }
    setenv(PKG_PREFIX_VNAME,
	   (p = find_plist(&Plist, PLIST_CWD)) ? p->name : NULL, 1);
    /* Protect against old packages with bogus @name fields */
    PkgName = (p = find_plist(&Plist, PLIST_NAME)) ? p->name : "anonymous";
    sprintf(LogDir, "%s/%s", (tmp = getenv(PKG_DBDIR)) ? tmp : DEF_LOG_DIR,
    	    basename_of(PkgName));
    if (isdir(LogDir)) {
	whinge("Package `%s' already recorded as installed.\n", PkgName);
	code = 1;
	goto success;	/* close enough for government work */
    }
    for (p = Plist.head; p ; p = p->next) {
	if (p->type != PLIST_PKGDEP)
	    continue;
	if (Verbose)
	    printf("Package `%s' depends on `%s'", PkgName, p->name);
	if (!Fake && vsystem("pkg_info -e %s", p->name)) {
	    char tmp[120];

	    if (Verbose)
		printf(" which is not currently loaded");
	    sprintf(tmp, "%s/%s.tgz", Home, p->name);
	    if (fexists(tmp)) {
		if (Verbose)
		    printf(" but was found - loading:\n");
		if (vsystem("pkg_add %s", tmp)) {
		    whinge("Autoload of dependency package `%s' failed!%s",
			   p->name, Force ? " (proceeding anyway)" : "");
		    if (!Force)
			code++;
		}
		else if (Verbose)
		    printf("\t`%s' loaded successfully.\n", p->name);
	    }
	    else {
	    	whinge("and was not found%s.", p->name,
	    	       Force ? " (proceeding anyway)" : "");
	    	if (!Force)
		    code++;
	    }
	}
        else if (Verbose)
	    printf(" - already installed.\n");
    }
    if (code != 0)
	goto success;	/* close enough for government work */

    if (fexists(REQUIRE_FNAME)) {
	vsystem("chmod +x %s", REQUIRE_FNAME);	/* be sure */
	if (Verbose)
	    printf("Running requirements file first for %s..\n", PkgName);
	if (!Fake && vsystem("./%s %s INSTALL", REQUIRE_FNAME, PkgName)) {
	    whinge("Package %s fails requirements %s",
		   pkg_fullname,
		   Force ? "installing anyway" : "- not installed.");
	    if (!Force) {
		code = 1;
		goto success;	/* close enough for government work */
	    }
	}
    }
    if (!NoInstall && fexists(INSTALL_FNAME)) {
	vsystem("chmod +x %s", INSTALL_FNAME);	/* make sure */
	if (Verbose)
	    printf("Running install with PRE-INSTALL for %s..\n", PkgName);
	if (!Fake && vsystem("./%s %s PRE-INSTALL", INSTALL_FNAME, PkgName)) {
	    whinge("Install script returned error status.");
	    code = 1;
	    goto success;		/* nothing to uninstall yet */
	}
    }
    extract_plist(home, &Plist);
    if (!NoInstall && fexists(MTREE_FNAME)) {
	if (Verbose)
	    printf("Running mtree for %s..\n", PkgName);
	p = find_plist(&Plist, PLIST_CWD);
	if (Verbose)
	    printf("mtree -u -f %s -d -e -p %s\n", MTREE_FNAME,
		   p ? p->name : "/");
	if (!Fake) {
	    pid_t chpid;
	    int rval, status;
	    chpid = fork();
	    if (chpid == 0) {
		execl("/usr/sbin/mtree", "mtree", "-u", "-f", MTREE_FNAME,
		      "-d", "-e", "-p", p ? p->name : "/");
		perror("cannot execute mtree");
		exit(3);
	    }
	    if (chpid == (pid_t) -1) {
		warn("Cannot fork mtree");
		code = 1;
		goto fail;
	    }
	    if (waitpid(chpid, &status, 0) == -1) {
		warn("Cannot wait for mtree");
		code = 1;
		goto fail;
	    }
	    if (!WIFEXITED(status)) {
		whinge("Strange exit from mtree: %x", status);
		code = 1;
		goto fail;
	    }
#ifdef DEBUG
	    whinge("mtree exits %d\n", WEXITSTATUS(status));
#endif
	    switch (WEXITSTATUS(status)) {
	    case 0:
		break;			/* normal */
	    case 2:
		whinge("\nWARNING: Mtree attempted some work which may not have completed.\n\tExamine the above output.\n\t(most likely it changed directory permissions)\n");
		break;
	    default:
		whinge("Error status %d from mtree.", WEXITSTATUS(status));
		code = 1;
		goto fail;
	    }
	}
    }
    if (!NoInstall && fexists(INSTALL_FNAME)) {
	if (Verbose)
	    printf("Running install with POST-INSTALL for %s..\n", PkgName);
	if (!Fake && vsystem("./%s %s POST-INSTALL", INSTALL_FNAME, PkgName)) {
	    whinge("Install script returned error status.");
	    code = 1;
	    goto fail;
	}
    }
    if (!NoRecord && !Fake) {
	char contents[FILENAME_MAX];
	FILE *cfile;

	umask(022);
	if (getuid() != 0)
	    whinge("Not running as root - trying to record install anyway.");
	if (!PkgName) {
	    whinge("No package name!  Can't record package, sorry.");
	    code = 1;
	    goto success;	/* well, partial anyway */
	}
	sprintf(LogDir, "%s/%s",
		(tmp = getenv(PKG_DBDIR)) ? tmp : DEF_LOG_DIR,
    	    	basename_of(PkgName));
	if (Verbose)
	    printf("Attempting to record package into %s..\n", LogDir);
	if (make_hierarchy(LogDir)) {
	    whinge("Can't record package into '%s', you're on your own!",
		   LogDir);
	    bzero(LogDir, FILENAME_MAX);
	    code = 1;
	    goto success;	/* close enough for government work */
	}
	/* Make sure pkg_info can read the entry */
	vsystem("chmod a+rx %s", LogDir);
	if (fexists(DEINSTALL_FNAME))
	    copy_file(".", DEINSTALL_FNAME, LogDir);
	if (fexists(REQUIRE_FNAME))
	    copy_file(".", REQUIRE_FNAME, LogDir);
	sprintf(contents, "%s/%s", LogDir, CONTENTS_FNAME);
	cfile = fopen(contents, "w");
	if (!cfile) {
	    whinge("Can't open new contents file '%s'!  Can't register pkg.",
		   contents);
	    goto success; /* can't log, but still keep pkg */
	}
	write_plist(&Plist, cfile);
	fclose(cfile);
	copy_file(".", DESC_FNAME, LogDir);
	copy_file(".", COMMENT_FNAME, LogDir);
	if (fexists(DISPLAY_FNAME))
	    copy_file(".", DISPLAY_FNAME, LogDir);
	for (p = Plist.head; p ; p = p->next) {
	    if (p->type != PLIST_PKGDEP)
		continue;
	    if (Verbose)
		printf("Attempting to record dependency on package `%s'\n",
		       p->name);
	    sprintf(contents, "%s/%s/%s",
	    	    (tmp = getenv(PKG_DBDIR)) ? tmp : DEF_LOG_DIR,
	    	    basename_of(p->name), REQUIRED_BY_FNAME);
	    cfile = fopen(contents, "a");
	    if (!cfile) {
		whinge("Can't open dependency file '%s'!\n\tDependency registration incomplete.",
		   contents);
		continue;
	    }
	    fprintf(cfile, "%s\n", basename_of(PkgName));
	    if (fclose(cfile) == EOF)
		warn("Cannot properly close file %s", contents);
	}
	if (Verbose)
	    printf("Package %s registered in %s\n", PkgName, LogDir);
    }
    
    if (p = find_plist(&Plist, PLIST_DISPLAY)) {
	FILE *fp;
	char buf[BUFSIZ];
	fp = fopen(p->name, "r");
	if (fp) {
	    putc('\n', stdout);
	    while (fgets(buf, sizeof(buf), fp))
		fputs(buf, stdout);
	    putc('\n', stdout);
	    (void) fclose(fp);
	} else
	    warn("Cannot open display file `%s'.", p->name);
    }

    goto success;

 fail:
    /* Nuke the whole (installed) show, XXX but don't clean directories */
    if (!Fake)
	delete_package(FALSE, FALSE, &Plist);

 success:
    /* delete the packing list contents */
    leave_playpen();

    return code;
}

static int
sanity_check(char *pkg)
{
    if (!fexists(CONTENTS_FNAME)) {
	whinge("Package %s has no CONTENTS file!", pkg);
	return 1;
    }
    if (!fexists(COMMENT_FNAME)) {
	whinge("Package %s has no COMMENT file!", pkg);
	return 1;
    }
    if (!fexists(DESC_FNAME)) {
	whinge("Package %s has no DESC file!", pkg);
	return 1;
    }
    return 0;
}

void
cleanup(int signo)
{
    if (signo)
	printf("Signal %d received, cleaning up..\n", signo);
    if (Plist.head) {
	if (!Fake)
	    delete_package(FALSE, FALSE, &Plist);
	free_plist(&Plist);
    }
    if (!Fake && LogDir[0])
	vsystem("%s -rf %s", REMOVE_CMD, LogDir);
    leave_playpen();
}