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/*
* This file is part of pkg (SvarDOS)
* Copyright (C) 2012-2022 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[512];
sprintf(fname, "%s\\packages\\%s.lst", 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 actually installing it!
* returns a pointer to the zip file's index on success, NULL on failure. the **zipfd pointer is updated with a file descriptor to the open zip file to install. */
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[256];
int appinfopresence;
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);
}
/* Now let's check the content of the zip file */
*zipfd = fopen(zipfile, "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 */
appinfopresence = 0;
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 (fdnpkg_strcasestr(curzipnode->filename, "links\\") == curzipnode->filename) {
curzipnode->filename[0] = 0; /* in fact, I just mark the file as 'empty' on the filename - see later below */
}
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;
}
if (strcmp(curzipnode->filename, appinfofile) == 0) appinfopresence = 1;
prevzipnode = curzipnode;
curzipnode = curzipnode->nextfile;
}
/* if appinfo file not found, this is not a real SvarDOS package */
if (appinfopresence != 1) {
kitten_printf(3, 12, appinfofile); /* "ERROR: Package do not contain the %s file! Not a valid SvarDOS package." */
puts("");
goto RAII_ERR;
}
goto RAII;
RAII_ERR:
zip_freelist(&ziplinkedlist);
ziplinkedlist = NULL;
if ((zipfd != NULL) && (*zipfd != NULL)) {
fclose(*zipfd);
*zipfd = NULL;
}
RAII:
pkg_freeflist(flist);
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(const char *pkgname, const char *dosdir, const struct customdirs *dirlist, struct ziplist *ziplinkedlist, FILE *zipfd) {
char buff[256];
char fulldestfilename[256];
char packageslst[32];
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 */
/* 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);
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, buff); /* "ERROR: Could not create %s!" */
puts("");
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 */
shortfile = computelocalpath(curzipnode->filename, buff, dosdir, dirlist); /* substitute paths to custom dirs */
/* log the filename to packages\pkg.lst */
fprintf(lstfd, "%s%s\r\n", buff, shortfile);
/* 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(lstfd);
kitten_printf(3, 19, pkgname, filesextractedsuccess, filesextractedfailure); /* "Package %s installed: %ld files extracted, %ld errors." */
puts("");
return(filesextractedfailure);
}