78 lines
2.4 KiB
C
78 lines
2.4 KiB
C
/*
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* Copyright (c) 1995 Andrew McRae. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#ifndef lint
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static const char rcsid[] =
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"$Id: wrattr.c,v 1.10 1997/11/18 21:08:08 nate Exp $";
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#endif /* not lint */
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#include <err.h>
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#include <fcntl.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include <sys/types.h>
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#include <sys/ioctl.h>
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#include <pccard/cardinfo.h>
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static void
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usage()
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{
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fprintf(stderr, "usage: pccardc wrattr slot offs value\n");
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exit(1);
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}
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int
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wrattr_main(argc, argv)
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int argc;
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char *argv[];
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{
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int reg, value;
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char name[64], c;
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int fd;
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off_t offs;
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if (argc != 4)
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usage();
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sprintf(name, CARD_DEVICE, atoi(argv[1]));
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fd = open(name, O_RDWR);
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if (fd < 0)
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err(1, "%s", name);
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reg = MDF_ATTR;
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if (ioctl(fd, PIOCRWFLAG, ®))
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err(1, "ioctl (PIOCRWFLAG)");
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if (sscanf(argv[2], "%x", ®) != 1 ||
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sscanf(argv[3], "%x", &value) != 1)
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errx(1, "arg error");
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offs = reg;
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c = value;
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lseek(fd, offs, SEEK_SET);
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if (write(fd, &c, 1) != 1)
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warn("%s", name);
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return 0;
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}
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