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/*
* This file is part of FDNPKG
* Copyright (C) 2012-2021 Mateusz Viste
* Changes by TK Chia
*/
#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 "crc32.h" /* all CRC32 related stuff */
#include "fdnpkg.h" /* PKGINST_NOSOURCE, PKGINST_SKIPLINKS... */
#include "http.h"
#include "helpers.h" /* slash2backslash(), strtolower() */
#include "fileexst.h"
#include "kprintf.h"
#include "libunzip.h" /* zip_listfiles()... */
#include "showinst.h" /* pkg_loadflist() */
#include "pkginst.h" /* include self for control */
#include "version.h"
/* return 1 if fname looks like a link filename, 0 otherwise */
static int islinkfile(char *fname) {
char *link1 = "LINKS\\";
char *link2 = "links\\";
int x;
for (x = 0; ; x++) {
if (link1[x] == 0) return(1);
if ((fname[x] != link1[x]) && (fname[x] != link2[x])) return(0);
}
}
/* validate a filename (8+3, no weird characters, etc). returns 0 on success,
* nonzero otherwise. */
static int validfilename(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);
}
/* processes a link file - that is, reads the target inside, and overwrite
* the file with new content */
static void processlinkfile(char *linkfile, char *dosdir, struct customdirs *dirlist, char *buff) {
char origtarget[512];
int x;
char *shortfile;
unsigned char comstub[] = { /* machine code of a COM stub launcher */
0xBC,0x00,0x00,0xBB,0x00,0x10,0xB4,0x4A,0xCD,0x21,0xBB,0x2A,0x01,0x8C,0x5F,0x04,
0x8C,0x5F,0x08,0x8C,0x5F,0x0C,0xB8,0x00,0x4B,0xBA,0x38,0x01,0xCD,0x21,0xB0,0x7F,
0x72,0x04,0xB4,0x4D,0xCD,0x21,0xB4,0x4C,0xCD,0x21,0x00,0x00,0x80,0x00,0x00,0x00,
0x5C,0x00,0x00,0x00,0x6C,0x00,0x00,0x00}; /* read comlink.asm for details */
const unsigned stack_paras = 12;
unsigned alloc_paras, alloc_bytes;
FILE *fd;
/* open the link file and read the original target */
fd = fopen(linkfile, "r");
if (fd == NULL) {
kitten_printf(3, 21, "Error: Failed to open link file '%s' for read access.", linkfile);
puts("");
return;
}
x = fread(origtarget, 1, sizeof(origtarget) - 1, fd);
origtarget[x] = 0;
fclose(fd);
/* validate the original target (ltrim to first \r or \n) */
for (x = 0; origtarget[x] != 0; x++) {
if ((origtarget[x] == '\r') || (origtarget[x] == '\n')) {
origtarget[x] = 0;
break;
}
}
/* translate the original target to a local path */
shortfile = computelocalpath(origtarget, buff, dosdir, dirlist);
/* compute the amount of memory the stub should leave for itself:
- 16 paragraphs needed for the PSP
- sizeof(comstub) bytes needed for code and data
- strlen(shortfile) + 1 for the command line
- stack_paras paragraphs for the stack */
alloc_paras = 16 + (sizeof(comstub) + strlen(shortfile) + 16) / 16 + stack_paras;
alloc_bytes = 16 * alloc_paras;
comstub[1] = alloc_bytes & 0xff;
comstub[2] = alloc_bytes >> 8;
comstub[4] = alloc_paras & 0xff;
comstub[5] = alloc_paras >> 8;
/* write new content into the link file */
fd = fopen(linkfile, "wb");
if (fd == NULL) {
kitten_printf(3, 22, "Error: Failed to open link file '%s' for write access.", linkfile);
puts("");
return;
}
fwrite(comstub, 1, sizeof(comstub), fd);
fprintf(fd, "%s%s%c", buff, shortfile, 0);
fclose(fd);
}
/* returns 0 if pkgname is not installed, non-zero otherwise */
int is_package_installed(char *pkgname, char *dosdir, char *mapdrv) {
char fname[512];
sprintf(fname, "%s\\packages\\%s.lst", dosdir, pkgname);
mapdrives(fname, mapdrv);
if (fileexists(fname) != 0) { /* file exists -> package is installed */
return(1);
} else {
return(0);
}
}
/* checks that pkgname is NOT installed. return 0 on success, non-zero otherwise. */
int validate_package_not_installed(char *pkgname, char *dosdir, char *mapdrv) {
if (is_package_installed(pkgname, dosdir, mapdrv) != 0) {
kitten_printf(3, 18, "Package %s is already installed! You might want to use the 'update' action.", pkgname);
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, char *fname) {
while (flist != NULL) {
if (strcmp(flist->fname, fname) == 0) return(flist);
flist = flist->next;
}
return(NULL);
}
/* prepare a package for installation. this is mandatory before actually installing it!
* returns a pointer to the zip file's index on success, NULL on failure. the *zipfile pointer is updated with a file descriptor to the open zip file to install. */
struct ziplist *pkginstall_preparepackage(struct pkgdb *pkgdb, char *pkgname, char *tempdir, char *localfile, int flags, char **repolist, FILE **zipfd, char *proxy, int proxyport, char *downloadingstring, char *dosdir, struct customdirs *dirlist, char *buffmem1k, char *mapdrv) {
char *fname;
char *zipfile;
char *appinfofile;
int appinfopresence;
char *shortfile;
struct ziplist *ziplinkedlist, *curzipnode, *prevzipnode;
struct flist_t *flist;
fname = buffmem1k;
zipfile = buffmem1k + 256;
appinfofile = buffmem1k + 512;
strtolower(pkgname); /* convert pkgname to lower case, because the http repo is probably case sensitive */
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, mapdrv) != 0)) {
return(NULL);
}
if (localfile != NULL) { /* if it's a local file, then we will have to skip all the network stuff */
strcpy(zipfile, localfile);
} else {
zipfile[0] = 0;
}
#ifndef NOREPOS
if (zipfile[0] == 0) { /* need to download the package from a repository */
char *instrepo;
struct pkgdb *pkgnode, *lastnode;
struct pkgrepo *pkgrepo;
int repoid;
unsigned long zipfilecrc, remotecrc;
unsigned char *buff;
int buffreadres;
char *pkgext; /* zip or zib */
/* look into the db to find the package */
pkgnode = findpkg(pkgdb, pkgname, &lastnode);
if (pkgnode == NULL) { /* no such package found in repositories */
kitten_printf(3, 1, "No package '%s' found in online repositories.", pkgname);
puts("");
return(NULL);
}
/* if found - check the list of repositories */
if (pkgnode->repolist == NULL) {
kitten_printf(3, 2, "Package '%s' is not available in repositories.", pkgname);
puts("");
return(NULL);
}
if (pkgnode->repolist->nextrepo != NULL) { /* available from more than 1 repo.. */
char userchoicestr[8];
int userchoice, latestver_repoid = 1;
struct pkgrepo *xrepo, *latestver = pkgnode->repolist;
/* check out if we are able to find out the newest version */
repoid = 2; /* setting to 2, because we start iterating at the second repo entry */
for (xrepo = pkgnode->repolist->nextrepo; xrepo != NULL; xrepo = xrepo->nextrepo) {
int versionnewerres = isversionnewer(latestver->version, xrepo->version);
if (versionnewerres > 0) {
latestver = xrepo;
latestver_repoid = repoid;
} else if (versionnewerres < 0) { /* unable to tell which version is newer */
latestver_repoid = -1;
break;
}
repoid += 1;
}
if (latestver_repoid > 0) {
repoid = latestver_repoid;
} else { /* newest version could not be figured out, so let's ask the user to choose */
puts("");
kitten_printf(3, 3, "%s is available from several repositories. Choose which one to use:", pkgname);
puts("");
repoid = 1;
for (xrepo = pkgnode->repolist; xrepo != NULL; xrepo = xrepo->nextrepo) {
printf(" %d) %s %s (%s)\n", repoid, pkgnode->name, xrepo->version, repolist[xrepo->repo]);
repoid += 1;
}
for (;;) {
kitten_printf(3, 4, "Your choice:");
printf(" ");
fgets(userchoicestr, 6, stdin);
userchoice = atoi(userchoicestr);
if ((userchoice < 1) || (userchoice >= repoid)) {
kitten_puts(3, 5, "Invalid choice!");
} else {
break;
}
}
repoid = userchoice;
}
} else { /* available only from one repository - get it there */
repoid = 1;
}
pkgrepo = pkgnode->repolist;
for (; repoid > 1; repoid--) pkgrepo = pkgrepo->nextrepo;
instrepo = repolist[pkgrepo->repo];
/* select the package extension: zip or zib */
if ((flags & PKGINST_NOSOURCE) && (pkgrepo->crc32zib != 0)) { /* use zib if available and if no sources needed */
pkgext = "zib"; /* zib is the same thing as zip, but binary-only (no sources) */
remotecrc = pkgrepo->crc32zib;
} else { /* otherwise use the full-blown zip package */
pkgext = "zip";
remotecrc = pkgrepo->crc32zip;
}
/* if it's a network repo, download the package from repoid into the temp directory */
if (detect_localpath(instrepo) == 0) {
sprintf(fname, "%s%s.%s", instrepo, pkgname, pkgext);
sprintf(zipfile, "%s\\fdnpkg.tmp", tempdir);
kitten_printf(3, 6, "Downloading package %s...", fname);
puts("");
if (http_get(fname, zipfile, proxy, proxyport, downloadingstring) <= 0) {
kitten_puts(3, 7, "Error downloading package. Aborted.");
return(NULL);
}
} else { /* else it's an on-disk repo, so we can use the package right from there */
sprintf(zipfile, "%s%s.%s", instrepo, pkgname, pkgext);
}
/* check the CRC of the downloaded file */
buff = malloc(4096); /* use a 4K buffer to compute file's CRC */
if (buff == NULL) {
kitten_puts(3, 15, "Error: Out of memory while computing the CRC of the package!");
return(NULL);
}
*zipfd = fopen(zipfile, "rb");
if (*zipfd == NULL) {
kitten_puts(3, 14, "Error: Failed to open the downloaded package. Installation aborted.");
free(buff);
return(NULL);
}
zipfilecrc = crc32_init();
while ((buffreadres = read(fileno(*zipfd), buff, 4096)) > 0) {
crc32_feed(&zipfilecrc, buff, buffreadres);
}
crc32_finish(&zipfilecrc);
fclose(*zipfd);
free(buff);
if (zipfilecrc != remotecrc) {
kitten_puts(3, 13, "Error: Downloaded package had wrong CRC. Installation aborted.");
return(NULL);
}
} /* if (zipfile[0] == 0) */
#endif
/* Now let's check the content of the zip file */
*zipfd = fopen(zipfile, "rb");
if (*zipfd == NULL) {
kitten_puts(3, 8, "Error: Invalid zip archive! Package not installed.");
return(NULL);
}
ziplinkedlist = zip_listfiles(*zipfd);
if (ziplinkedlist == NULL) {
kitten_puts(3, 8, "Error: Invalid zip archive! Package not installed.");
fclose(*zipfd);
return(NULL);
}
/* if updating, load the list of files belonging to the current package */
if ((flags & PKGINST_UPDATE) != 0) {
flist = pkg_loadflist(pkgname, dosdir);
} else {
flist = NULL;
}
/* Verify that there's no collision with existing local files, look for the appinfo presence, get rid of sources if required, and rename BAT links into COM files */
appinfopresence = 0;
prevzipnode = NULL;
for (curzipnode = ziplinkedlist; curzipnode != NULL;) {
/* change all slashes to backslashes, and switch into all-lowercase */
slash2backslash(curzipnode->filename);
strtolower(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 */
}
/* if --nosource specified, skip sources */
if ((flags & PKGINST_NOSOURCE) != 0) {
if (fdnpkg_strcasestr(curzipnode->filename, "source\\") == curzipnode->filename) { /* drop this file */
curzipnode->filename[0] = 0; /* in fact, we just mark the file as 'empty' on the filename.. see below */
}
}
/* is it a "link file"? */
if (fdnpkg_strcasestr(curzipnode->filename, "links\\") == curzipnode->filename) {
/* skip links, if that's what the user wants */
if ((flags & PKGINST_SKIPLINKS) != 0) {
curzipnode->filename[0] = 0; /* in fact, we just mark the file as 'empty' on the filename.. see later below */
} else {
/* if it's a *.BAT link, then rename it to *.COM */
char *ext = getfext(curzipnode->filename);
if (strcasecmp(ext, "bat") == 0) sprintf(ext, "com");
}
}
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) {
kitten_puts(3, 23, "Error: Package contains an invalid filename:");
printf(" %s\n", curzipnode->filename);
zip_freelist(&ziplinkedlist);
fclose(*zipfd);
return(NULL);
}
/* 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);
mapdrives(fname, mapdrv);
strcat(fname, shortfile);
if ((findfileinlist(flist, fname) == NULL) && (fileexists(fname) != 0)) {
kitten_puts(3, 9, "Error: Package contains a file that already exists locally:");
printf(" %s\n", fname);
zip_freelist(&ziplinkedlist);
fclose(*zipfd);
return(NULL);
}
/* abort if any entry is encrypted */
if ((curzipnode->flags & ZIP_FLAG_ENCRYPTED) != 0) {
kitten_printf(3, 20, "Error: Package contains an encrypted file:");
puts("");
printf(" %s\n", curzipnode->filename);
zip_freelist(&ziplinkedlist);
fclose(*zipfd);
return(NULL);
}
/* abort if any file is compressed with an unsupported method */
if ((curzipnode->compmethod != 0/*store*/) && (curzipnode->compmethod != 8/*deflate*/) && (curzipnode->compmethod != 14/*lzma*/)) { /* unsupported compression method */
kitten_printf(8, 2, "Error: Package contains a file compressed with an unsupported method (%d):", curzipnode->compmethod);
puts("");
printf(" %s\n", curzipnode->filename);
zip_freelist(&ziplinkedlist);
fclose(*zipfd);
return(NULL);
}
if (strcmp(curzipnode->filename, appinfofile) == 0) appinfopresence = 1;
prevzipnode = curzipnode;
curzipnode = curzipnode->nextfile;
}
/* if appinfo file not found, this is not a real FreeDOS package */
if (appinfopresence != 1) {
kitten_printf(3, 12, "Error: Package do not contain the %s file! Not a valid FreeDOS package.", appinfofile);
puts("");
zip_freelist(&ziplinkedlist);
fclose(*zipfd);
return(NULL);
}
return(ziplinkedlist);
}
/* 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(char *pkgname, char *dosdir, struct customdirs *dirlist, struct ziplist *ziplinkedlist, FILE *zipfd, char *mapdrv) {
char *buff;
char *fulldestfilename;
char packageslst[64];
char *shortfile;
long filesextractedsuccess = 0, filesextractedfailure = 0;
struct ziplist *curzipnode;
FILE *lstfd;
sprintf(packageslst, "packages\\%s.lst", pkgname); /* Prepare the packages/xxxx.lst filename string for later use */
buff = malloc(512);
fulldestfilename = malloc(1024);
if ((buff == NULL) || (fulldestfilename == NULL)) {
kitten_puts(8, 0, "Out of memory!");
zip_freelist(&ziplinkedlist);
free(buff);
free(fulldestfilename);
return(-1);
}
/* create the %DOSDIR%/packages directory, just in case it doesn't exist yet */
sprintf(buff, "%s\\packages\\", dosdir);
mkpath(buff);
/* open the lst file */
sprintf(buff, "%s\\%s", dosdir, packageslst);
mapdrives(buff, mapdrv);
lstfd = fopen(buff, "wb"); /* opening it in binary mode, because I like to have control over line terminators (CR/LF) */
if (lstfd == NULL) {
kitten_printf(3, 10, "Error: Could not create %s!", buff);
puts("");
zip_freelist(&ziplinkedlist);
free(buff);
free(fulldestfilename);
return(-2);
}
/* write list of files in zip into the lst, and create the directories structure */
for (curzipnode = ziplinkedlist; curzipnode != NULL; curzipnode = curzipnode->nextfile) {
int unzip_result;
if ((curzipnode->flags & ZIP_FLAG_ISADIR) != 0) continue; /* skip directories */
if (strcasecmp(curzipnode->filename, packageslst) == 0) continue; /* skip silently the package.lst file, if found */
shortfile = computelocalpath(curzipnode->filename, buff, dosdir, dirlist); /* substitute paths to custom dirs */
/* log the filename to packages\pkg.lst (with original, unmapped drive) */
fprintf(lstfd, "%s%s\r\n", buff, shortfile);
/* remap drive letter, if needed (AFTER writing to lstfd) */
mapdrives(buff, mapdrv);
/* 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, "Error while extracting '%s' to '%s'!", curzipnode->filename, fulldestfilename);
printf(" [%d]\n", unzip_result);
filesextractedfailure += 1;
} else {
printf(" %s -> %s\n", curzipnode->filename, buff);
filesextractedsuccess += 1;
}
/* if it's a LINK file, recompute a new content */
if (islinkfile(curzipnode->filename) != 0) {
unmapdrives(buff, mapdrv);
processlinkfile(fulldestfilename, dosdir, dirlist, buff);
}
}
fclose(lstfd);
/* free the ziplist and close file descriptor */
zip_freelist(&ziplinkedlist);
free(buff);
free(fulldestfilename);
kitten_printf(3, 19, "Package %s installed: %ld files extracted, %ld errors.", pkgname, filesextractedsuccess, filesextractedfailure);
puts("");
return(filesextractedfailure);
}