From: Richard W.M. Jones Date: Fri, 5 Jan 2018 10:35:43 +0000 (+0000) Subject: Initial import from ioport-1.2. X-Git-Url: http://git.annexia.org/?a=commitdiff_plain;h=577964f19e1cd66142a15d0660c7a961dec43a31;p=ioport.git Initial import from ioport-1.2. --- 577964f19e1cd66142a15d0660c7a961dec43a31 diff --git a/.gitignore b/.gitignore new file mode 100644 index 0000000..8714dae --- /dev/null +++ b/.gitignore @@ -0,0 +1,11 @@ +Makefile.in + +/INSTALL +/aclocal.m4 +/compile +/config.h.in +/configure +/depcomp +/install-sh +/ioport.spec +/missing diff --git a/COPYING b/COPYING new file mode 100644 index 0000000..e77696a --- /dev/null +++ b/COPYING @@ -0,0 +1,339 @@ + GNU GENERAL PUBLIC LICENSE + Version 2, June 1991 + + Copyright (C) 1989, 1991 Free Software Foundation, Inc. + 675 Mass Ave, Cambridge, MA 02139, USA + Everyone is permitted to copy and distribute verbatim copies + of this license document, but changing it is not allowed. + + Preamble + + The licenses for most software are designed to take away your +freedom to share and change it. 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Of course, the commands you use may +be called something other than `show w' and `show c'; they could even be +mouse-clicks or menu items--whatever suits your program. + +You should also get your employer (if you work as a programmer) or your +school, if any, to sign a "copyright disclaimer" for the program, if +necessary. Here is a sample; alter the names: + + Yoyodyne, Inc., hereby disclaims all copyright interest in the program + `Gnomovision' (which makes passes at compilers) written by James Hacker. + + , 1 April 1989 + Ty Coon, President of Vice + +This General Public License does not permit incorporating your program into +proprietary programs. If your program is a subroutine library, you may +consider it more useful to permit linking proprietary applications with the +library. If this is what you want to do, use the GNU Library General +Public License instead of this License. diff --git a/Makefile.am b/Makefile.am new file mode 100644 index 0000000..7bc203f --- /dev/null +++ b/Makefile.am @@ -0,0 +1,34 @@ +bin_PROGRAMS = inb + +inb_SOURCES = port.c +inb_CFLAGS = -Wall + +# Make hard links for local testing before installation. +all-local: + for p in outb inw outw inl outl; do \ + rm -f $$p; \ + ln inb $$p; \ + done + +# Make hard links after installation. +install-exec-hook: + for p in outb inw outw inl outl; do \ + rm -f $(DESTDIR)$(bindir)$$p; \ + ln $(DESTDIR)$(bindir)/inb $(DESTDIR)$(bindir)/$$p; \ + done + +# The man page is inb.1 (source: inb.pod). The other pages are +# links to inb.1. +man_MANS = inb.1 outb.1 inw.1 outw.1 inl.1 outl.1 + +inb.1: inb.pod + pod2man \ + -c "I/O Ports" \ + --release "$(PACKAGE_NAME)-$(PACKAGE_VERSION)" \ + $< > $@ + +inb.txt: inb.pod + pod2text $< > $@ + +EXTRA_DIST = inb.pod inw.1 inl.1 outb.1 outw.1 outl.1 \ + ioport.spec ioport.spec.in diff --git a/README b/README new file mode 100644 index 0000000..2847369 --- /dev/null +++ b/README @@ -0,0 +1,33 @@ +I/O port access from the command line +By Richard W.M. Jones +---------------------------------------------------------------------- + +This package adds commands to access machine I/O ports directly. For +example: + + outw 0x443 0xf + inb 0x278 + +Note most of the time you should never use these commands unless you +know what you are doing. + +Usage +---------------------------------------------------------------------- + +The commands are pretty much used as you would expect. For additional +help, use '--help' and/or read the manual page. + +You will need to run the commands as root. Strictly speaking you will +need CAP_SYS_RAWIO capability. + +Implementation +---------------------------------------------------------------------- + +At first glance it would seem that /dev/port would be the best way to +access I/O ports. However /dev/port under Linux is fundamentally +flawed because it only allows byte-sized access to ports. For example +if you write a single long (4 bytes) it will turn that into 4 +individual outb operations. + +Instead we use iopl(2) to raise our I/O privilege level so that we can +do the correct in and out operation as requested. diff --git a/configure.ac b/configure.ac new file mode 100644 index 0000000..5cb6c2c --- /dev/null +++ b/configure.ac @@ -0,0 +1,14 @@ +AC_INIT(ioport,1.2) +AM_INIT_AUTOMAKE + +AC_PROG_CC +AM_PROG_CC_C_O + +AC_CHECK_PROG(PERLDOC,[perldoc],[perldoc],[no]) +if test "x$PERLDOC" = "xno" ; then + AC_MSG_FAILURE([perldoc not found - install perl to make man pages]) +fi + +AC_CONFIG_HEADERS([config.h]) +AC_CONFIG_FILES([Makefile ioport.spec]) +AC_OUTPUT diff --git a/inb.pod b/inb.pod new file mode 100644 index 0000000..cd1c3bf --- /dev/null +++ b/inb.pod @@ -0,0 +1,99 @@ +=head1 NAME + +inb, outb, inw, outw, inl, outl - access I/O ports + +=head1 SYNOPSIS + + inb ADDRESS + inw ADDRESS + inl ADDRESS + outb ADDRESS DATA + outw ADDRESS DATA + outl ADDRESS DATA + +=head1 EXAMPLES + + inb 0x278 + outw 0x440 0xffff + +=head1 DESCRIPTION + +These commands enable command line and script access directly to I/O +ports on PC hardware. + +The C, C and C commands perform an input (read) +operation on the given I/O port, and print the result. + +The C, C and C commands perform an output (write) +operation to the given I/O port, sending the given data. Note that +the order of the parameters is ADDRESS DATA. + +The size of the operation is selected according to the suffix, with +C meaning byte, C meaning word (16 bits) and C meaning long +(32 bits). + +Port numbers are in the range 0-0xffff. We don't support access to +memory mapped devices. + +Hexadecimal numbers (prefixed by C<0x>), decimal numbers, and octal +numbers (prefixed by C<0>), are allowed as parameters. + +=head1 RETURN FROM "IN" OPERATIONS + +The value read from the port by an "in" operation is normally printed +in decimal. + +Use the C<--hex> option to print the result as hexadecimal (C<0x> +prefix is NOT printed). + +Use the C<--code> option to turn the result into an exit status. Note +that Unix/shell can only reliably return exit status in the range +0-0x7f, so this is not particularly useful in practice. + +=head1 TYPE AND SIZE OF OPERATION + +The type and size of the operation is normally determined by the name +of the command, eg. C is a read operation of 1 byte. + +You can override this by using the C<--read>, C<--write> and/or +C<--size N> options. For C<--size N>, C should be C<1>, C<2> or +C<4> meaning byte, word and long respectively. + +=head1 PERMISSIONS + +You would normally need to be root or have the C +capability in order to run these commands. + +=head1 WARNING + +Using these commands can cause Bad Things to happen to your hardware. + +=head1 SEE ALSO + +L, +L, +L, +L. + +=head1 AUTHORS + +Richard W.M. Jones + +=head1 COPYRIGHT + +(C) Copyright 2009 Red Hat Inc., +L. + +This program is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2 of the License, or +(at your option) any later version. + +This program is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with this program; if not, write to the Free Software +Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. diff --git a/inl.1 b/inl.1 new file mode 100644 index 0000000..7c37ff4 --- /dev/null +++ b/inl.1 @@ -0,0 +1 @@ +.so man1/inb.1 diff --git a/inw.1 b/inw.1 new file mode 100644 index 0000000..7c37ff4 --- /dev/null +++ b/inw.1 @@ -0,0 +1 @@ +.so man1/inb.1 diff --git a/ioport.spec.in b/ioport.spec.in new file mode 100644 index 0000000..98a2cb4 --- /dev/null +++ b/ioport.spec.in @@ -0,0 +1,71 @@ +# @configure_input@ + +Summary: Access I/O ports +Name: ioport +Version: @VERSION@ +Release: 1%{?dist} +License: GPLv2+ +Group: Development/Tools +URL: http://et.redhat.com/~rjones/ioport/ +Source0: http://et.redhat.com/~rjones/ioport/files/%{name}-%{version}.tar.gz +BuildRoot: %{_tmppath}/%{name}-%{version}-%{release}-root +ExclusiveArch: %{ix86} x86_64 + + +%description +These commands enable command line and script access directly to I/O +ports on PC hardware. + +The inb, inw and inl commands perform an input (read) operation on the +given I/O port, and print the result. + +The outb, outw and outl commands perform an output (write) operation +to the given I/O port, sending the given data. Note that the order of +the parameters is ADDRESS DATA. + +The size of the operation is selected according to the suffix, with +'b' meaning byte, 'w' meaning word (16 bits) and 'l' meaning long +(32 bits). + + +%prep +%setup -q + + +%build +%configure +make + + +%install +rm -rf $RPM_BUILD_ROOT +make DESTDIR=$RPM_BUILD_ROOT install + + +%clean +rm -rf $RPM_BUILD_ROOT + + +%files +%defattr(-,root,root,-) +%doc COPYING README +%{_bindir}/inb +%{_bindir}/inw +%{_bindir}/inl +%{_bindir}/outb +%{_bindir}/outw +%{_bindir}/outl +%{_mandir}/man1/inb.1* +%{_mandir}/man1/inw.1* +%{_mandir}/man1/inl.1* +%{_mandir}/man1/outb.1* +%{_mandir}/man1/outw.1* +%{_mandir}/man1/outl.1* + + +%changelog +* Mon Mar 16 2009 Richard Jones - 1.1-1 +- Only offer to build on x86 and x86-64 architectures. + +* Mon Mar 9 2009 Richard Jones - 1.0-1 +- Initial build. diff --git a/outb.1 b/outb.1 new file mode 100644 index 0000000..7c37ff4 --- /dev/null +++ b/outb.1 @@ -0,0 +1 @@ +.so man1/inb.1 diff --git a/outl.1 b/outl.1 new file mode 100644 index 0000000..7c37ff4 --- /dev/null +++ b/outl.1 @@ -0,0 +1 @@ +.so man1/inb.1 diff --git a/outw.1 b/outw.1 new file mode 100644 index 0000000..7c37ff4 --- /dev/null +++ b/outw.1 @@ -0,0 +1 @@ +.so man1/inb.1 diff --git a/port.c b/port.c new file mode 100644 index 0000000..9dcaeac --- /dev/null +++ b/port.c @@ -0,0 +1,216 @@ +/* I/O port access + * Copyright (C) 2009 Red Hat Inc. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. + */ + +#include + +#include +#include +#include +#include +#include +#include +#include + +#include + +static int op = 0; /* Operation, 0 = read, 1 = write. */ +static int size = 1; /* Operation size in bytes. */ +static int rcode = 0; /* If set, inX exits with return value. */ +static int rhex = 0; /* If set, print result in hex. */ + +static struct option long_options[] = { + { "code", 0, 0, 'c' }, + { "read", 0, 0, 'r' }, + { "size", 1, 0, 's' }, + { "write", 0, 0, 'w' }, + { "hex", 0, 0, 'x' }, + { NULL, 0, 0, 0 }, +}; +static const char *options = "crs:w"; + +static void +usage () +{ + printf ("\n\ +Usage:\n\ + inb|inw|inl [--options] address\n\ + outb|outw|outl [--options] address data\n\ +Options:\n\ +--code Exit with status code instead of printing value (inX only).\n\ +--hex Print hex instead of decimal (inX only).\n\ +--read Perform a read (in) operation.\n\ +--write Perform a write (out) operation.\n\ +--size N Set size to N bytes where N = 1, 2 or 4.\n\ +\n\ +For detailed information, see the manual page inb(1).\n\ +"); +} + +static unsigned get_int_or_die (const char *); + +int +main (int argc, char *argv[]) +{ + int c, option_index; + char *p; + unsigned addr = 0; + unsigned data = 0; + + /* Find out how the program was invoked. */ + p = strrchr (argv[0], '/'); + if (p == NULL) p = argv[0]; else p++; + + if (strncasecmp (p, "inb", 3) == 0) { + op = 0; size = 1; + } else if (strncasecmp (p, "outb", 4) == 0) { + op = 1; size = 1; + } else if (strncasecmp (p, "inw", 3) == 0) { + op = 0; size = 2; + } else if (strncasecmp (p, "outw", 4) == 0) { + op = 1; size = 2; + } else if (strncasecmp (p, "inl", 3) == 0) { + op = 0; size = 4; + } else if (strncasecmp (p, "outl", 4) == 0) { + op = 1; size = 4; + } + + /* Parse command line arguments. */ + while (1) { + option_index = 0; + c = getopt_long (argc, argv, options, long_options, &option_index); + if (c == -1) break; + + switch (c) { + case 'c': + rcode = 1; + break; + + case 'r': + op = 0; + break; + + case 's': + size = get_int_or_die (optarg); + if (!(size == 1 || size == 2 || size == 4)) { + fprintf (stderr, "%s: size can only be 1, 2 or 4.\n", optarg); + exit (1); + } + break; + + case 'w': + op = 1; + break; + + case 'x': + rhex = 1; + break; + + case 0: + fprintf (stderr, "internal error in getopt_long\n"); + exit (1); + + default: + usage (); + exit (1); + } + } + + /* Parse the address (for read/write) and data (for writes). */ + if (optind >= argc) { + missing: + fprintf (stderr, "%s: missing parameter, see --help or man page\n", + argv[0]); + exit (1); + } + + addr = get_int_or_die (argv[optind++]); + + if (op == 1) { + if (optind >= argc) goto missing; + data = get_int_or_die (argv[optind++]); + } + + if (optind != argc) { + fprintf (stderr, + "%s: extra parameters on command line, see --help or man page\n", + argv[0]); + exit (1); + } + + /* Raise our privilege level. */ + if (iopl (3) == -1) { + fprintf (stderr, "iopl failed: You may need to run as root or give the process the CAP_SYS_RAWIO\ncapability. On non-x86 architectures, this operation probably isn't possible.\n"); + perror ("iopl"); + exit (1); + } + + /* Perform the operation. */ + switch (op) { + case 0: + switch (size) { + case 1: data = inb (addr); break; + case 2: data = inw (addr); break; + case 4: data = inl (addr); break; + } + break; + case 1: + switch (size) { + case 1: outb (data, addr); break; + case 2: outw (data, addr); break; + case 4: outl (data, addr); break; + } + break; + } + + if (op == 0) { + if (rcode == 0) { + if (rhex == 0) + printf ("%d\n", data); + else + printf ("%x\n", data); + } else + exit (data); + } + exit (0); +} + +static unsigned +get_int_or_die (const char *str) +{ + char *endp; + unsigned r; + + errno = 0; + r = strtoul (str, &endp, 0); + if ((errno == ERANGE && r == ULONG_MAX) + || (errno != 0 && r == 0)) { + perror (str); + exit (1); + } + + if (str == endp) { + fprintf (stderr, "expecting a number, but found an empty string\n"); + exit (1); + } + if (*endp != '\0') { + fprintf (stderr, "%s: trailing garbage after number\n", str); + exit (1); + } + + return r; +}