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vms.c
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C/C++ Source or Header
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1993-08-30
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2KB
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82 lines
/*
** A wildcard expansion function for VAX/VMS
** -- Rahul Dhesi
*/
/* ::[[ @(#) vms.c 1.5 89/03/10 19:09:28 ]]:: */
#ifndef LINT
static char sccsid[]="::[[ @(#) vms.c 1.5 89/03/10 19:09:28 ]]::";
#endif
/*
Checksum: 3221488897 (verify or update with "brik")
*/
#include <descrip.h>
#define FMAX 3 /* Number of different filename patterns */
#define PATHSIZE 1024 /* buffer area to store pathname */
char *nextfile (what, filespec, fileset)
int what; /* whether to initialize or match */
register char *filespec; /* filespec to match if initializing */
register int fileset; /* which set of files */
{
int status;
char *p; /* temp ptr */
struct dsc$descriptor_s d_fwild, d_ffound;
static int first_time [FMAX+1];
static char saved_fspec [FMAX+1][PATHSIZE]; /* our own copy of filespec */
static char found_fspec [FMAX+1][PATHSIZE]; /* matched filename */
static unsigned long context [FMAX+1]; /* needed by VMS */
if (what == 0) {
strcpy (saved_fspec[fileset], filespec); /* save the filespec */
first_time[fileset] = 1;
return (0);
}
/* Reach here if what is not 0, so it must be 1 */
/* Create a descriptor for the wildcarded filespec */
d_fwild.dsc$w_length = strlen (saved_fspec[fileset]);
d_fwild.dsc$a_pointer = saved_fspec[fileset];
d_fwild.dsc$b_class = DSC$K_CLASS_S;
d_fwild.dsc$b_dtype = DSC$K_DTYPE_T;
d_ffound.dsc$w_length = sizeof (found_fspec[fileset]);
d_ffound.dsc$a_pointer = found_fspec[fileset];
d_ffound.dsc$b_class = DSC$K_CLASS_S;
d_ffound.dsc$b_dtype = DSC$K_DTYPE_T;
if (first_time[fileset]) {
first_time[fileset] = 0;
context[fileset] = 0L; /* tell VMS this is first search */
}
status = LIB$FIND_FILE (&d_fwild, &d_ffound, &context[fileset]);
status = status & 1; /* use only lowest bit */
if (status == 0) {
LIB$FIND_FILE_END (&context[fileset]);
return ((char *) 0);
} else {
found_fspec[fileset][d_ffound.dsc$w_length] = '\0'; /* just in case */
p = found_fspec[fileset];
while (*p != ' ' && *p != '\0')
p++;
if (*p != '\0')
*p = '\0';
return (found_fspec[fileset]);
}
}
/* Compensate for bug in VAX/VMS C exit() function */
#ifdef exit
# undef exit
#endif
int bugexit (n)
int n;
{
exit (1);
}