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- /* LATER.C -- Exit with a 1 if any file has a higher create
- date than the last or if the last file does not exist.
- A 2 is returned if any other files do not exist.
- Later only works on MS-DOS V2.0.
-
- A>LATER FILE1.C FILE1.O
- Later will set completion code to 1 if FILE1.C was
- created after FILE1.O.
-
- A>LATER FILE1.C FILE1.H FILE1.O
- Later will set completion code to 1 if FILE1.C or
- FILE1.H was created after FILE1.O. */
-
-
-
- main(argc,argv)
- int argc;
- char *argv[]; {
-
- unsigned ifile,ofile,i;
- long odate,dateof();
-
- puts("LATER V1.0 ");
-
- if (argc < 3 ) {
- puts("need two or more arguments");
- exit(0);
- }
-
- if ((ofile=open(argv[argc-1],0)) == -1)
- exit(1); /* the last file does not exist */
-
- odate=dateof(ofile);
- close(ofile);
-
- /* for each file see if it is later than the last one */
-
- for (i=1; i < argc-1; i++) {
- if ((ifile=open(argv[i],0)) == -1) {
- puts(argv[i]);
- puts(" does not exist");
- exit(2); /* an early file does not exist */
- }
- if (dateof(ifile) > odate) exit(1); /* found a later file */
- close(ifile);
- }
-
- /* none of the files are later. set completion code of zero */
-
- exit(0);
- }
-
-
- /* return a long encoding the date and time of a file */
-
- long dateof(fil)
- int fil; {
- static long ret_dt;
-
- #asm
- mov bx,[bp+4] ;file handle is here. only argument.
- and bx,0ffh ;low byte of file id is MS-DOS handle.
- mov al,0 ;code to retrieve date and time.
- mov ah,57h ;dos code for get file date and time.
- int 21h ;call dos.
- mov word dateof_ret_dt_+2,dx;store date in high word of ret_dt.
- mov word dateof_ret_dt_,cx ;store time in low word of ret_dt.
- ;note: "dateof_" is added to name
- ;because ret_dt is static.
- #
- return ret_dt;
- }
-