Article View: comp.sys.ibm.pc.misc
Article #2652Re: DOS Batch files (help) (long)
From: Markus Fischer
Date: Thu, 23 Aug 1990 13:50
Date: Thu, 23 Aug 1990 13:50
306 lines
16253 bytes
16253 bytes
In article <3078@orbit.cts.com>, griggs@pnet51.orb.mn.org (Griggs Nichols)
writes:
> Batch file aficionados, I need some help.
>
> I am trying to figure out a way to read/verify a VOL label on a disk in drive
> A, through a command line in a batch file.
It would be nice to read the volume into some variable, but then DOS's batch
language is so limited to start with, that I wouldn't know what to do with
it.
The testing of the volume is much simpler, and it's funny enough that a friend
just asked me to write such a program. Here it is, feel free to do anything
you want with it (yes, even a porting to basic is allowed :-).
----- cut here -----
/*
* volis.c : checks for correct volume name
*
* usage: volis [-v] [D:] "volume name"
* returns: 0 if volume of drive D: (dflt: current) is the same.
* (case sensitive comparaison)
* 1 if volume exists and is different
* 2 if volume is not set (exept "volume name" is ".")
* 3 on error or help message
* notes: the special name "." means `no volume'
* the -v (verbose) flag produces a short message
*
* Writen for TC 1.5 by Markus Fischer, Geneva, August 1990
*/
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <dir.h>
char verbose = 0;
char drive[] = "?:\\*.*";
struct ffblk ffblk;
#define LABEL ffblk.ff_name
#define FA_LABEL 0x08 /* file attribute for volume label */
void done(int el)
{
if (verbose) switch (el) {
case 0: printf("(0) volume is ok\n"); break;
case 1: printf("(1) volume in drive %.2s is %s\n", drive, LABEL); break;
case 2: printf("(2) volume not set in drive %.2s\n", drive); break;
case 3: printf("(3) can't read from %.2s\n", drive); break;
default: printf("bug!\n");
}
exit(el);
}
void main (int argc, char *argv[])
{
/* check for verbose flag */
if (argc>1 && strcmp("-v", argv[1]) == 0) {
verbose = 1;
argc--; argv++;
}
/* check for valid disk name */
if (argc>1 && argv[1][1]==':' && argv[1][2]=='\0') {
drive[0] = argv[1][0];
argc--; argv++;
}
else {
drive[0] = (char) getdisk() + 'A';
}
/* print usage */
if (argc==1) {
puts("usage: volis [-v] [D:] \"volume name\"");
puts("returns error level 0 if volume of drive D: compares ok");
puts(" 1 if volume of drive D: is different");
puts(" 2 if volume is not set");
puts(" 3 on error");
puts(" the special name \".\" means `no volume name'");
puts(" the -v (verbose) flag produces a short message");
puts("Markus Fischer, Geneva, August 1990");
exit(3);
}
/* trying to find the label */
if (findfirst(drive, &ffblk, FA_LABEL)) { /* unsucessful */
strcpy(drive+3, "NUL");
if (fopen(drive, "r") != NULL) /* drive exists */
if (strcmp(".", argv[1]) == 0) done(0); /* ok, no volume */
else done(2); /* volume not found */
else done(3); /* error */
}
else {
/* get rid of the extension sepeartor at LABEL[8] */
if (strlen(LABEL)>8) {
register char *c;
for (c=LABEL+8; *c=c[1]; c++);
}
done(strcmp(LABEL, argv[1]) != 0);
}
}
----- end -----
For convinience, I enclose the uuencoded *.com file
----- cut here -----
section 1 of uuencode 4.02 of file volis.com by R.E.M.
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6P);`F("D@6;!9L%FP4%)
``
end
sum -r/size 24845/11138 section (from "begin" to "end")
sum -r/size 15304/7934 entire input file
----- end -----
NOTE: I guarantee that the source file in this posting is the one I used to
produce the executable, without any changes, and that to my knowledge, no virus
has attached itself to it. On the other hand I will in no circomstances be
liable for any damage caused by this program.
Enjoy!
Markus Fischer -|--|--|--|--|--|--I Department of Anthropology
-|--|--|--|--|--|--|-(#)-I University of Geneva
-|--|--|--|--|--|--|--|--|-(#)-|-(#)(#)(_)-I CH-1227 Carouge (GE)
-&-(_)-|--|--|-(#)-&--|-(#)(#)(_)(#)-&-(_)(#)-I Switzerland
-|--|--|--|--|-(#)(_)-|-(_)(_)(_)(#)-I
black (#) to kill ! --|--|-(#)(_)(_)(_)(#)(#)(_)(_) fisher@sc2a.unige.ch
=+==+==+==+==+==+==+==+==+==+==+==+==+==+==+=(#)=+ fisher@cgeuge52.bitnet
Technical Details
Message-ID:
<244@sc2a.unige.ch>Path:
arc1-ca.pugleaf.net!utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!uunet!mcsun!cernvax!chx400!ugun2b!ugsc2a!fisherReferences:
<3078@orbit.cts.com>Show Full Headers
Complete Article Headers
Path: arc1-ca.pugleaf.net!utzoo!utgpu!news-server.csri.toronto.edu!cs.utexas.edu!uunet!mcsun!cernvax!chx400!ugun2b!ugsc2a!fisher From: fisher@sc2a.unige.ch (Markus Fischer) Newsgroups: comp.sys.ibm.pc.misc Subject: Re: DOS Batch files (help) (long) Message-ID: <244@sc2a.unige.ch> Date: 23 Aug 90 13:50:20 GMT References: <3078@orbit.cts.com> Organization: University of Geneva, Switzerland Lines: 306