249 lines
5.1 KiB
C
249 lines
5.1 KiB
C
/*-
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* Copyright (c) 2016 Netflix, Inc.
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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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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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#include <ctype.h>
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#include <efivar.h>
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#include <efivar-dp.h>
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#include <err.h>
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#include <errno.h>
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#include <getopt.h>
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#include <stddef.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#define MAXSIZE 65536 /* Everything will be smaller than this, most 1000x smaller */
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/* options descriptor */
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static struct option longopts[] = {
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{ "to-unix", no_argument, NULL, 'u' },
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{ "to-efi", no_argument, NULL, 'e' },
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{ "format", no_argument, NULL, 'f' },
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{ "parse", no_argument, NULL, 'p' },
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{ NULL, 0, NULL, 0 }
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};
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static int flag_format, flag_parse, flag_unix, flag_efi;
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static void
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usage(void)
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{
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errx(1, "efidp [-efpu]");
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}
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static ssize_t
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read_file(int fd, void **rv)
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{
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uint8_t *retval;
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size_t len;
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off_t off;
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ssize_t red;
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len = MAXSIZE;
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off = 0;
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retval = malloc(len);
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do {
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red = read(fd, retval + off, len - off);
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if (red == 0)
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break;
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off += red;
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if (off == (off_t)len)
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break;
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} while (1);
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*rv = retval;
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return off;
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}
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static void
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parse_args(int argc, char **argv)
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{
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int ch;
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while ((ch = getopt_long(argc, argv, "efpu",
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longopts, NULL)) != -1) {
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switch (ch) {
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case 'e':
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flag_efi++;
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break;
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case 'f':
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flag_format++;
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break;
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case 'p':
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flag_parse++;
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break;
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case 'u':
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flag_unix++;
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break;
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default:
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usage();
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}
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}
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argc -= optind;
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argv += optind;
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if (argc >= 1)
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usage();
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if (flag_parse + flag_format + flag_efi + flag_unix != 1) {
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warnx("Can only use one of -p (--parse), "
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"and -f (--format)");
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usage();
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}
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}
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static char *
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trim(char *s)
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{
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char *t;
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while (isspace(*s))
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s++;
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t = s + strlen(s) - 1;
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while (t > s && isspace(*t))
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*t-- = '\0';
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return s;
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}
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static void
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unix_to_efi(void)
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{
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char buffer[MAXSIZE];
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char efi[MAXSIZE];
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efidp dp;
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char *walker;
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int rv;
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dp = NULL;
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while (fgets(buffer, sizeof(buffer), stdin)) {
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walker= trim(buffer);
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free(dp);
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dp = NULL;
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rv = efivar_unix_path_to_device_path(walker, &dp);
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if (rv != 0 || dp == NULL) {
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errno = rv;
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warn("Can't convert '%s' to efi", walker);
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continue;
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}
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if (efidp_format_device_path(efi, sizeof(efi),
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dp, efidp_size(dp)) < 0) {
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warnx("Can't format dp for '%s'", walker);
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continue;
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}
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printf("%s\n", efi);
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}
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free(dp);
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}
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static void
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efi_to_unix(void)
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{
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char buffer[MAXSIZE];
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char dpbuf[MAXSIZE];
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efidp dp;
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char *walker, *dev, *relpath, *abspath;
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int rv;
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dp = (efidp)dpbuf;
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while (fgets(buffer, sizeof(buffer), stdin)) {
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walker= trim(buffer);
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efidp_parse_device_path(walker, dp, sizeof(dpbuf));
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rv = efivar_device_path_to_unix_path(dp, &dev, &relpath, &abspath);
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if (rv == 0)
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printf("%s:%s %s\n", dev, relpath, abspath);
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else {
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errno = rv;
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warn("Can't convert '%s' to unix", walker);
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}
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}
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}
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static void
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format(void)
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{
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char buffer[MAXSIZE];
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ssize_t fmtlen;
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ssize_t len;
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void *data;
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size_t dplen;
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const_efidp dp;
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len = read_file(STDIN_FILENO, &data);
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if (len == -1)
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err(1, "read");
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dp = (const_efidp)data;
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while (len > 0) {
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dplen = efidp_size(dp);
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fmtlen = efidp_format_device_path(buffer, sizeof(buffer),
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dp, dplen);
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if (fmtlen > 0)
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printf("%s\n", buffer);
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len -= dplen;
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dp = (const_efidp)((const char *)dp + dplen);
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}
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free(data);
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}
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static void
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parse(void)
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{
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char buffer[MAXSIZE];
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efidp dp;
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ssize_t dplen;
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char *walker;
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dplen = MAXSIZE;
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dp = malloc(dplen);
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if (dp == NULL)
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errx(1, "Can't allocate memory.");
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while (fgets(buffer, sizeof(buffer), stdin)) {
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walker= trim(buffer);
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dplen = efidp_parse_device_path(walker, dp, dplen);
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if (dplen == -1)
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errx(1, "Can't parse %s", walker);
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write(STDOUT_FILENO, dp, dplen);
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}
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free(dp);
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}
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int
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main(int argc, char **argv)
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{
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parse_args(argc, argv);
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if (flag_unix)
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efi_to_unix();
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else if (flag_efi)
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unix_to_efi();
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else if (flag_format)
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format();
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else if (flag_parse)
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parse();
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}
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