/*  * inp.c -- read all the ports specified in hex on the command line. *     The program uses the faster ioperm/iopl calls on x86, /dev/port *     on other platforms. The program acts as inb/inw/inl according *     to its own name */#include <stdio.h>#include <stdlib.h>#include <string.h>#include <unistd.h>#include <errno.h>#include <fcntl.h>#include <sys/types.h>#include <sys/stat.h>#include <asm/io.h> /* linux-specific */#ifdef __GLIBC__#  include <sys/perm.h>#endif#define PORT_FILE "/dev/port"char *prgname;#ifdef __i386__static int read_and_print_one(unsigned int port,int size){    static int iopldone = 0;    if (port > 1024) {	if (!iopldone && iopl(3)) {	    fprintf(stderr, "%s: iopl(): %s\n", prgname, strerror(errno));	    return 1;	}	iopldone++;    } else if (ioperm(port,size,1)) {	fprintf(stderr, "%s: ioperm(%x): %s\n", prgname,		port, strerror(errno));	return 1;    }    if (size == 4)	printf("%04x: %08x\n", port, inl(port));    else if (size == 2)	printf("%04x: %04x\n", port, inw(port));    else	printf("%04x: %02x\n", port, inb(port));    return 0;}#else /* not i386 */static int read_and_print_one(unsigned int port,int size){    static int fd = -1;    unsigned char b; unsigned short w; unsigned int l;    if (fd < 0)	fd = open(PORT_FILE, O_RDONLY);    if (fd < 0) {	fprintf(stderr, "%s: %s: %s\n", prgname, PORT_FILE, strerror(errno));	return 1;    }    lseek(fd, port, SEEK_SET);        if (size == 4) {	read(fd, &l, 4);	printf("%04x: 0x%08x\n", port, l);    } else if (size == 2) {	read(fd, &w, 2);	printf("%04x: 0x%04x\n", port, w & 0xffff);    } else {	read(fd, &b, 1);	printf("%04x: 0x%02x\n", port, b & 0xff);    }    return 0;}#endif /* i386 */int main(int argc, char **argv){    unsigned int i, n, port, size, error = 0;        prgname = argv[0];    /* find the data size */    switch (prgname[strlen(prgname)-1]) {        case 'w': size = 2; break;        case 'l': size = 4; break;        case 'b': case 'p': default:	    size = 1;    }    setuid(0); /* if we're setuid, force it on */    for (i = 1; i < argc; i++) {        if ( sscanf(argv[i], "%x%n", &port, &n) < 1	      || n != strlen(argv[i]) ) {	    fprintf(stderr, "%s: argument \"%s\" is not a hex number\n",		    argv[0], argv[i]);	    error++; continue;	}	if (port & (size-1)) {	    fprintf(stderr, "%s: argument \"%s\" is not properly aligned\n",		    argv[0], argv[i]);	    error++; continue;	}	error += read_and_print_one(port, size);    }    exit (error ? 1 : 0);}