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snip9_91.arc
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GETDCWD.C
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C/C++ Source or Header
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1991-09-17
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1KB
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65 lines
/*
** GETDCWD.C - returns the current working directory for a specific drive
**
** for ZTC/C++ by Bob Jarvis
*/
#include <dos.h>
#include <stdlib.h>
#include <stdio.h>
#include <ctype.h>
char *getdcwd(unsigned int drive) /* 0 = current, 1 = A, 2 = B, etc */
{
union REGS regs;
struct SREGS sregs;
char *retptr;
retptr = malloc(67);
if(retptr == NULL)
return NULL;
if(drive == 0) /* figure out which drive is current */
{
dos_getdrive(&drive);
drive += 1;
}
*retptr = (drive-1) + 'A';
*(retptr+1) = ':';
*(retptr+2) = '\\';
regs.h.ah = 0x47;
regs.h.dl = drive;
#if SPTR
sregs.ds = getDS();
regs.x.si = (unsigned)retptr+3;
#else
sregs.ds = FP_SEG(retptr);
regs.x.si = FP_OFF(retptr)+3;
#endif
intdosx(®s, ®s, &sregs);
if(regs.x.ax == 15) /* drive number invalid */
{
free(retptr);
return NULL;
}
else return retptr;
}
main(int argc, char *argv[])
{
char *curpath;
unsigned int n;
if(argc > 1)
n = (tolower(*argv[1]) - 'a') + 1;
else dos_getdrive(&n);
curpath = getdcwd(n);
printf("curpath = '%s'\n", curpath);
}