I found the source code for dspcat.c: http://www.smart.net/~rlhamil/. Specifically in this tarball. I tried compiling it and was missing a variable:
$ make
cc -O -DSOLARIS dspcat.c -o dspcat
dspcat.c: In function ‘format_msg’:
dspcat.c:11:23: error: ‘NL_TEXTMAX’ undeclared (first use in this function)
static char result[NL_TEXTMAX*2+1];
^
dspcat.c:11:23: note: each undeclared identifier is reported only once for each function it appears in
dspcat.c: In function ‘print_file’:
dspcat.c:240:23: error: ‘NL_SETMAX’ undeclared (first use in this function)
int setlo=1, sethi=NL_SETMAX, msglo=1, msghi=NL_MSGMAX, x, y;
^
dspcat.c:240:49: error: ‘NL_MSGMAX’ undeclared (first use in this function)
int setlo=1, sethi=NL_SETMAX, msglo=1, msghi=NL_MSGMAX, x, y;
^
dspcat.c: In function ‘main’:
dspcat.c:338:30: error: ‘NL_MSGMAX’ undeclared (first use in this function)
if (msg_nr<1 || msg_nr>NL_MSGMAX) {
^
dspcat.c:353:32: error: ‘NL_SETMAX’ undeclared (first use in this function)
if (msg_set<1 || msg_set>NL_SETMAX) {
^
make: *** [dspcat] Error 1
The variable NL_SETMAX does not appear to be defined on my system. I did locate this header file, bits/xopen_lim.h that did have this variable so I added this to the list of headers on a whim.
$ make
cc -O -DSOLARIS dspcat.c -o dspcat
dspcat.c: In function ‘format_msg’:
dspcat.c:11:33: warning: integer overflow in expression [-Woverflow]
static char result[NL_TEXTMAX*2+1];
^
dspcat.c:11:16: error: size of array ‘result’ is negative
static char result[NL_TEXTMAX*2+1];
^
dspcat.c:11:16: error: storage size of ‘result’ isn’t constant
dspcat.c:15:29: warning: integer overflow in expression [-Woverflow]
for (x=0; x < (NL_TEXTMAX*2) && *s != '\0'; s++)
^
make: *** [dspcat] Error 1
If I have more time I'll play with this, but I believe if you statically set that variable within the code directly you may be able to compile this yourself.