146 lines
2.8 KiB
C++
146 lines
2.8 KiB
C++
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/*_ chmod.c Mon Feb 29 1988 Modified by: Walter Bright */
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/* Copyright (C) 1987-1988 by Walter Bright */
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/* All Rights Reserved */
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/* Written by Walter Bright */
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/* To compile with Zortech C: */
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/* ztc -mti chmod */
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#include <stdio.h>
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#include <dos.h>
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#include <stdlib.h>
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#include <ctype.h>
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/* Prototypes */
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void usage(void);
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void faterr(char*, char*);
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int chmod(char* filename, int mode);
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/* Attribute bits: */
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#define R 1
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#define H 2
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#define S 4
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#define V 8
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#define D 0x10
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#define A 0x20
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main(argc,argv)
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int argc;
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char *argv[];
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{ int i,j,c;
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char *p;
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struct FIND *find;
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unsigned onmask,offmask;
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static char flag[9] = "RHSVDAUU";
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if (argc <= 1)
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usage();
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p = argv[1];
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if (*p == '+' || *p == '-')
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{
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onmask = 0;
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offmask = 0;
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while (1)
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{
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c = toupper(p[1]);
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if (*p == '+')
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{ switch (c)
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{ case 'R': onmask |= R; break;
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case 'H': onmask |= H; break;
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case 'S': onmask |= S; break;
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case 'V': onmask |= V; break;
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case 'D': onmask |= D; break;
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case 'A': onmask |= A; break;
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default:
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faterr("unrecognized flag '%s'",p);
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}
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}
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else if (*p == '-')
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{ switch (c)
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{ case 'R': offmask |= R; break;
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case 'H': offmask |= H; break;
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case 'S': offmask |= S; break;
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case 'V': offmask |= V; break;
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case 'D': offmask |= D; break;
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case 'A': offmask |= A; break;
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default:
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faterr("unrecognized flag '%s'",p);
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}
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}
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else if (*p == 0)
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break;
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else
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faterr("unrecognized flag '%s'",p);
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p += 2;
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}
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for (i = 2; i < argc; i++)
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{
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find = findfirst(argv[i],0xFF);
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while (find)
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{ c = find->attribute;
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c = (c & ~offmask) | onmask;
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chmod(find->name,c);
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find = findnext();
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}
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}
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}
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else /* merely print the attributes of the files */
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{
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for (i = 1; i < argc; i++)
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{
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find = findfirst(argv[i],0xFF);
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while (find)
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{ c = find->attribute;
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for (j = 7; j >= 0; j--)
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if ((1 << j) & c)
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printf("%c",flag[j]);
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else
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printf("-");
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printf("\t0x%02x\t%s\n",c,find->name);
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find = findnext();
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}
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}
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}
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}
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/********************
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* Change attribute of file.
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*/
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int chmod(char* filename, int mode)
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{ union REGS regs;
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regs.x.ax = 0x4301;
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regs.x.cx = mode;
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regs.x.dx = (int) filename;
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intdos(®s,®s);
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}
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void faterr(f,p)
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char *f,*p;
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{
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printf("Fatal error: ");
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printf(f,p);
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printf("\n");
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exit(1);
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}
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void usage(void)
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{
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printf("\
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File attribute byte display/modification program.\n\
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Use:\n\
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chmod {(+|-)flag} file...\n\
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Where:\n\
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flag is one of R,H,S,V,D,A\n\
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R Read-only\n\
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H Hidden\n\
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S System\n\
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V Volume label\n\
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D Sub-directory\n\
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A Archive\n\
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\n\
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If no flags are given, the attributes are displayed.\n\
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");
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}
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