0,0 → 1,520 |
/* |
* 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 */ |
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#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" |
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/* 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); |
} |
} |
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/* 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); |
} |
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/* 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); |
} |
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/* 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); |
} |
} |
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/* 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); |
} |
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/* 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); |
} |
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/* 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; |
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fname = buffmem1k; |
zipfile = buffmem1k + 256; |
appinfofile = buffmem1k + 512; |
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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 */ |
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/* 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); |
} |
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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; |
} |
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#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 */ |
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/* 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); |
} |
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/* 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); |
} |
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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]; |
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/* 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; |
} |
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/* 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 |
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/* Now let's check the content of the zip file */ |
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*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"); |
} |
} |
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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); |
} |
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return(ziplinkedlist); |
} |
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/* 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; |
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sprintf(packageslst, "packages\\%s.lst", pkgname); /* Prepare the packages/xxxx.lst filename string for later use */ |
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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); |
} |
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/* create the %DOSDIR%/packages directory, just in case it doesn't exist yet */ |
sprintf(buff, "%s\\packages\\", dosdir); |
mkpath(buff); |
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/* 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); |
} |
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/* 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); |
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/* free the ziplist and close file descriptor */ |
zip_freelist(&ziplinkedlist); |
free(buff); |
free(fulldestfilename); |
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kitten_printf(3, 19, "Package %s installed: %ld files extracted, %ld errors.", pkgname, filesextractedsuccess, filesextractedfailure); |
puts(""); |
return(filesextractedfailure); |
} |