Subversion Repositories SvarDOS

/*

 * This file is part of the pkg (SvarDOS) project.

 * Copyright (C) Mateusz Viste 2012-2024

 */

#include <direct.h> /* opendir() and friends */

#include <stdio.h>

#include <string.h>    /* strlen() */

#include <stdlib.h>    /* free() */

#include "crc32.h"

#include "helpers.h"

#include "svarlang.lib\svarlang.h"

#include "healthck.h"

static void clrcurline(unsigned short screenwidth);

#pragma aux clrcurline = \

"mov ah, 0x02" \

"mov dl, 0x0D" \

"int 0x21" \

"mov ax, 0x0A20" /* int 10h "write char to screen" */ \

"xor bx, bx"     /* video page and attribute (attr on PCjr) */ \

"int 0x10" \

parm [cx] \

modify [ax bx dx]

/* checks the health of a package (or all packages).

 * Returns 0 on success, non-zero otherwise */

int healthcheck(unsigned char *buff4k, const char *pkgname, const char *dosdir, unsigned char extendedcheck) {

  char *crc, *ext;

  FILE *flist, *fd;

  unsigned long goodcrc, realcrc;

  unsigned short errcount = 0;

  DIR *dp = NULL;

  struct dirent *ep;

  if (pkgname == NULL) {

    sprintf(buff4k, "%s\\appinfo", dosdir);

    dp = opendir(buff4k);

    if (dp == NULL) {

      output(svarlang_str(9, 0)); /* "ERROR: Could not access directory:" */

      outputnl(buff4k);

      return(-1);

    }

    AGAIN:

    /* if check is system-wide then fetch next package */

    while ((ep = readdir(dp)) != NULL) { /* readdir() result must never be freed (static allocation) */

      int tlen = strlen(ep->d_name);

      if (ep->d_name[0] == '.') continue; /* ignore '.', '..', and hidden directories */

      if (tlen < 4) continue; /* files must be at least 5 bytes long ("x.lst") */

      if (strcasecmp(ep->d_name + tlen - 4, ".lsm") != 0) continue;  /* if not an .lsm file, skip it silently */

      ep->d_name[tlen - 4] = 0; /* trim out the ".lsm" suffix */

      break;

    }

    if (ep == NULL) {

      closedir(dp);

      goto DONE;

    }

    pkgname = ep->d_name;

  }

  /************************************************************

   * pkgname is valid now so let's proceed with serious stuff *

   ************************************************************/

  /* open the (legacy) listing file at %DOSDIR%\packages\pkgname.lst

   * if not exists then fall back to appinfo\pkgname.lsm */

  sprintf(buff4k, "%s\\appinfo\\%s.lsm", dosdir, pkgname);

  flist = fopen(buff4k, "rb");

  if (flist == NULL) {

    sprintf(buff4k, svarlang_str(4,0), pkgname); /* "Package %s is not installed, so not removed." */

    outputnl(buff4k);

    return(-1);

  }

  /* iterate over all files listed in pkgname.lsm */

  while (freadtokval(flist, buff4k, 4096, NULL, 0) == 0) {

    /* skip empty lines */

    if (buff4k[0] == 0) continue;

    /* change all slash to backslash */

    slash2backslash(buff4k);

    /* skip garbage */

    if ((buff4k[1] != ':') || (buff4k[2] != '\\')) continue;

    /* trim out CRC information and get the ptr to it (if present) */

    crc = trimfnamecrc(buff4k);

    if (crc == NULL) continue;

    goodcrc = strtoul(crc, NULL, 16);

    ext = getfext(buff4k);

    strlwr(ext);

    /* skip non-executable files (unless healthcheck+) */

    if ((extendedcheck == 0) &&

        (strcmp(ext, "bat") != 0) &&

        (strcmp(ext, "bin") != 0) &&

        (strcmp(ext, "com") != 0) &&

        (strcmp(ext, "dll") != 0) &&

        (strcmp(ext, "drv") != 0) &&

        (strcmp(ext, "exe") != 0) &&

        (strcmp(ext, "ovl") != 0) &&

        (strcmp(ext, "sys") != 0)) continue;

    output("[");

    output(pkgname);

    output("] ");

    output(buff4k);

    realcrc = CRC32_INITVAL;

    fd = fopen(buff4k, "rb");

    if (fd == NULL) {

      outputnl(": NOT FOUND");

      continue;

    }

    for (;;) {

      unsigned short bufflen;

      bufflen = fread(buff4k, 1, 4096, fd);

      if (bufflen == 0) break;

      crc32_feed(&realcrc, buff4k, bufflen);

    }

    fclose(fd);

    crc32_finish(&realcrc);

    if (goodcrc != realcrc) {

      sprintf(buff4k, ": %s", "BAD CRC");

      outputnl(buff4k);

      errcount++;

      continue;

    }

    clrcurline(80);

  }

  /* close the lsm file */

  fclose(flist);

  if (dp != NULL) goto AGAIN;

  DONE:

  if (errcount == 0) {

    outputnl(svarlang_strid(0x0A00));

  } else {

    sprintf(buff4k, "%u errors.", errcount);

    outputnl(buff4k);

  }

  return(0);

}