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/*
* This file is part of pkg (SvarDOS)
* Copyright (C) 2012-2024 Mateusz Viste
*/
#include <ctype.h> /* toupper() */
#include <stdio.h>
#include <stdlib.h> /* system() */
#include <string.h> /* strcpy() */
#include <unistd.h> /* read() */
#include <sys/types.h> /* struct utimbuf */
#include "helpers.h" /* slash2backslash() */
#include "fileexst.h"
#include "kprintf.h"
#include "libunzip.h" /* zip_listfiles()... */
#include "showinst.h" /* pkg_loadflist() */
#include "svarlang.lib\svarlang.h"
#include "pkginst.h" /* include self for control */
/* validate a filename (8+3, no weird characters, etc). returns 0 on success,
* nonzero otherwise. */
static int validfilename(const char *fname) {
int i, i2;
char *validchars = "!#$%&'()-@^_`{}~";
int elemlen = 0;
int elemmaxlen = 8; /* switches from 8 to 3 depending wheter I am analyzing
a filename or an extension */
/* look for invalid chars in the entire string, and check the length of the
* element at the same time */
for (i = 0; fname[i] != 0; i++) {
/* director separators are threated specially */
if (fname[i] == '\\') {
elemlen = 0;
elemmaxlen = 8;
continue;
}
/* '.' switches the check into extension mode */
if (fname[i] == '.') {
if (elemlen == 0) return(-1); /* a file must have a base name */
if (elemmaxlen == 3) return(-2); /* a file cannot have two extensions */
elemlen = 0;
elemmaxlen = 3;
continue;
}
/* check that the element is not too long */
if (++elemlen > elemmaxlen) return(-3);
/* look for valid characters */
if ((fname[i] >= 'a') && (fname[i] <= 'z')) continue;
if ((fname[i] >= 'A') && (fname[i] <= 'Z')) continue;
if ((fname[i] >= '0') && (fname[i] <= '9')) continue;
if ((fname[i] & 128) != 0) continue; /* high bytes are okay (NLS) */
/* look for other valid characters */
for (i2 = 0; validchars[i2] != 0; i2++) {
if (fname[i] == validchars[i2]) break;
}
if (validchars[i2] != 0) continue;
/* if we are here, then the character is invalid */
return(-4);
}
/* all checks passed */
return(0);
}
/* returns 0 if pkgname is not installed, non-zero otherwise */
int is_package_installed(const char *pkgname, const char *dosdir) {
char fname[256];
sprintf(fname, "%s\\appinfo\\%s.lsm", dosdir, pkgname);
return(fileexists(fname)); /* file exists -> package is installed */
}
/* checks that pkgname is NOT installed. return 0 on success, non-zero otherwise. */
static int validate_package_not_installed(const char *pkgname, const char *dosdir) {
if (is_package_installed(pkgname, dosdir) != 0) {
kitten_printf(3, 18, pkgname); /* "Package %s is already installed! You might want to use the 'update' action." */
puts("");
return(-1);
}
return(0);
}
/* find a filename in a flist linked list, and returns a pointer to it */
static struct flist_t *findfileinlist(struct flist_t *flist, const char *fname) {
while (flist != NULL) {
if (strcasecmp(flist->fname, fname) == 0) return(flist);
flist = flist->next;
}
return(NULL);
}
/* prepare a package for installation. this is mandatory before installing it!
* returns a pointer to the zip file's index on success, NULL on failure.
* the **zipfd pointer is updated with file descriptor of the open (to be
* installed) zip file.
* the returned ziplist is guaranteed to have the APPINFO file as first node
* the ziplist is also guaranteed not to contain any directory entries */
struct ziplist *pkginstall_preparepackage(const char *pkgname, const char *zipfile, int flags, FILE **zipfd, const char *dosdir, const struct customdirs *dirlist) {
char fname[256];
char appinfofile[32];
struct ziplist *appinfoptr;
char *shortfile;
struct ziplist *ziplinkedlist = NULL, *curzipnode, *prevzipnode;
struct flist_t *flist = NULL;
sprintf(appinfofile, "appinfo\\%s.lsm", pkgname); /* Prepare the appinfo/xxxx.lsm filename string for later use */
/* check if not already installed, if already here, print a message "you might want to use update instead"
* of course this must not be done if we are in the process of upgrading said package */
if (((flags & PKGINST_UPDATE) == 0) && (validate_package_not_installed(pkgname, dosdir) != 0)) {
return(NULL);
}
/* copy zip filename into fname */
strcpy(fname, zipfile);
/* append an .SVP extension if not present */
{
int slen = strlen(fname);
if ((slen < 4) || (fname[slen - 4] != '.')) strcat(fname, ".SVP");
}
/* does the file exist? */
if (!fileexists(fname)) {
puts(svarlang_str(10, 1)); /* ERROR: File not found */
goto RAII;
}
/* now let's check the content of the zip file */
*zipfd = fopen(fname, "rb");
if (*zipfd == NULL) {
puts(svarlang_str(3, 8)); /* "ERROR: Invalid zip archive! Package not installed." */
goto RAII;
}
ziplinkedlist = zip_listfiles(*zipfd);
if (ziplinkedlist == NULL) {
puts(svarlang_str(3, 8)); /* "ERROR: Invalid zip archive! Package not installed." */
goto RAII;
}
/* if updating, load the list of files belonging to the current package */
if ((flags & PKGINST_UPDATE) != 0) {
flist = pkg_loadflist(pkgname, dosdir);
}
/* Verify that there's no collision with existing local files, look for the appinfo presence */
appinfoptr = NULL;
prevzipnode = NULL;
for (curzipnode = ziplinkedlist; curzipnode != NULL;) {
/* change all slashes to backslashes, and switch into all-lowercase */
slash2backslash(curzipnode->filename);
strlwr(curzipnode->filename);
/* remove 'directory' ZIP entries to avoid false alerts about directory already existing */
if ((curzipnode->flags & ZIP_FLAG_ISADIR) != 0) {
curzipnode->filename[0] = 0; /* mark it "empty", will be removed in a short moment */
}
/* is it a "link file"? skip it - link files are no longer supported */
if (strstr(curzipnode->filename, "links\\") == curzipnode->filename) {
curzipnode->filename[0] = 0; /* in fact, I just mark the file as 'empty' on the filename - see later below */
}
/* is it the appinfo file? detach it from the list for now */
if (strcmp(curzipnode->filename, appinfofile) == 0) {
appinfoptr = curzipnode;
curzipnode = curzipnode->nextfile;
if (prevzipnode == NULL) {
ziplinkedlist = curzipnode;
} else {
prevzipnode->nextfile = curzipnode;
}
continue;
}
if (curzipnode->filename[0] == 0) { /* ignore empty filenames (maybe it was empty originally, or has been emptied because it's a dropped source or link) */
if (prevzipnode == NULL) { /* take the item out of the list */
ziplinkedlist = curzipnode->nextfile;
free(curzipnode); /* free the item */
curzipnode = ziplinkedlist;
} else {
prevzipnode->nextfile = curzipnode->nextfile;
free(curzipnode); /* free the item */
curzipnode = prevzipnode->nextfile;
}
continue; /* go to the next item */
}
/* validate that the file has a valid filename (8+3, no shady chars...) */
if (validfilename(curzipnode->filename) != 0) {
puts(svarlang_str(3, 23)); /* "ERROR: Package contains an invalid filename:" */
printf(" %s\n", curzipnode->filename);
goto RAII_ERR;
}
/* look out for collisions with already existing files (unless we are
* updating the package and the local file belongs to it */
shortfile = computelocalpath(curzipnode->filename, fname, dosdir, dirlist);
strcat(fname, shortfile);
if ((findfileinlist(flist, fname) == NULL) && (fileexists(fname) != 0)) {
puts(svarlang_str(3, 9)); /* "ERROR: Package contains a file that already exists locally:" */
printf(" %s\n", fname);
goto RAII_ERR;
}
/* abort if any entry is encrypted */
if ((curzipnode->flags & ZIP_FLAG_ENCRYPTED) != 0) {
puts(svarlang_str(3, 20)); /* "ERROR: Package contains an encrypted file:" */
printf(" %s\n", curzipnode->filename);
goto RAII_ERR;
}
/* abort if any file is compressed with an unsupported method */
if ((curzipnode->compmethod != ZIP_METH_STORE) && (curzipnode->compmethod != ZIP_METH_DEFLATE)) { /* unsupported compression method */
kitten_printf(8, 2, curzipnode->compmethod); /* "ERROR: Package contains a file compressed with an unsupported method (%d):" */
puts("");
printf(" %s\n", curzipnode->filename);
goto RAII_ERR;
}
/* add node to list */
prevzipnode = curzipnode;
curzipnode = curzipnode->nextfile;
}
/* if appinfo file not found, this is not a real SvarDOS package */
if (appinfoptr == NULL) {
kitten_printf(3, 12, appinfofile); /* "ERROR: Package do not contain the %s file! Not a valid SvarDOS package." */
puts("");
goto RAII_ERR;
}
/* attach the appinfo node to the top of the list (installation second stage
* relies on this) */
appinfoptr->nextfile = ziplinkedlist;
ziplinkedlist = appinfoptr;
goto RAII;
RAII_ERR:
zip_freelist(&ziplinkedlist);
ziplinkedlist = NULL;
if ((zipfd != NULL) && (*zipfd != NULL)) {
fclose(*zipfd);
*zipfd = NULL;
}
RAII:
pkg_freeflist(flist);
return(ziplinkedlist);
}
/* look for a "warn" field in the package's LSM file and display it if found */
static void display_warn_if_exists(const char *pkgname, const char *dosdir, char *buff, size_t buffsz) {
FILE *fd;
char *msgptr;
int warncount = 0, i;
sprintf(buff, "%s\\appinfo\\%s.lsm", dosdir, pkgname);
fd = fopen(buff, "rb");
if (fd == NULL) return;
while (freadtokval(fd, buff, buffsz, &msgptr, ':') == 0) {
if (msgptr != NULL) {
if (strcasecmp(buff, "warn") == 0) {
/* print a visual delimiter */
if (warncount == 0) {
puts("");
for (i = 0; i < 79; i++) putchar('*');
puts("");
}
/* there may be more than one "warn" line */
puts(msgptr);
warncount++;
}
}
}
fclose(fd);
/* if one or more warn lines have been displayed then close with a delimiter again */
if (warncount > 0) {
for (i = 0; i < 79; i++) putchar('*');
puts("");
}
}
/* install a package that has been prepared already. returns 0 on success,
* or a negative value on error, or a positive value on warning */
int pkginstall_installpackage(const char *pkgname, const char *dosdir, const struct customdirs *dirlist, struct ziplist *ziplinkedlist, FILE *zipfd) {
char buff[256];
char fulldestfilename[256];
char *shortfile;
long filesextractedsuccess = 0, filesextractedfailure = 0;
struct ziplist *curzipnode;
FILE *lsmfd;
int unzip_result;
/* create the %DOSDIR%/APPINFO directory, just in case it doesn't exist yet */
sprintf(buff, "%s\\appinfo\\%s.lsm", dosdir, pkgname);
mkpath(buff);
/* start by extracting the APPINFO (LSM) file - I need it so I can append the
* list of files belonging to the packages later */
unzip_result = zip_unzip(zipfd, ziplinkedlist, buff);
if (unzip_result != 0) {
kitten_printf(8, 3, ziplinkedlist, buff); /* "ERROR: failed extracting '%s' to '%s'!" */
printf(" [%d]\n", unzip_result);
return(-1);
}
printf(" %s -> %s\n", ziplinkedlist->filename, buff);
filesextractedsuccess++;
/* open the (freshly created) LSM file */
lsmfd = fopen(buff, "ab"); /* opening in APPEND mode so I do not loose the LSM content */
if (lsmfd == NULL) {
kitten_printf(3, 10, buff); /* "ERROR: Could not create %s!" */
puts("");
return(-2);
}
fprintf(lsmfd, "\r\n"); /* in case the LSM does not end with a clear line already */
/* write list of files in zip into the lst, and create the directories structure */
for (curzipnode = ziplinkedlist->nextfile; curzipnode != NULL; curzipnode = curzipnode->nextfile) {
/* substitute paths to custom dirs */
shortfile = computelocalpath(curzipnode->filename, buff, dosdir, dirlist);
/* log the filename to LSM metadata file + its CRC */
fprintf(lsmfd, "%s%s?%08lX\r\n", buff, shortfile, curzipnode->crc32);
/* create the path, just in case it doesn't exist yet */
mkpath(buff);
sprintf(fulldestfilename, "%s%s", buff, shortfile);
/* Now unzip the file */
unzip_result = zip_unzip(zipfd, curzipnode, fulldestfilename);
if (unzip_result != 0) {
kitten_printf(8, 3, curzipnode->filename, fulldestfilename); /* "ERROR: failed extracting '%s' to '%s'!" */
printf(" [%d]\n", unzip_result);
filesextractedfailure += 1;
} else {
printf(" %s -> %s\n", curzipnode->filename, buff);
filesextractedsuccess += 1;
}
}
fclose(lsmfd);
kitten_printf(3, 19, pkgname, filesextractedfailure, filesextractedsuccess); /* "Package %s installed: %ld errors, %ld files extracted." */
puts("");
/* scan the LSM file for a "warn" message to display */
display_warn_if_exists(pkgname, dosdir, buff, sizeof(buff));
return(filesextractedfailure);
}