624 lines
21 KiB
C
624 lines
21 KiB
C
/*
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* Copyright (C) IBM Corp. 2003
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* Copyright (C) SUSE Linux Products GmbH, 2006
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <stdarg.h>
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#include <stdbool.h>
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#include <unistd.h>
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#include <signal.h>
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#include <fcntl.h>
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#include <errno.h>
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#include <string.h>
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#include <ctype.h>
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#include <getopt.h>
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#include <sys/stat.h>
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#include "libudev.h"
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#include "libudev-private.h"
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#include "scsi_id.h"
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#include "udev-util.h"
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static const struct option options[] = {
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{ "device", required_argument, NULL, 'd' },
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{ "config", required_argument, NULL, 'f' },
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{ "page", required_argument, NULL, 'p' },
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{ "blacklisted", no_argument, NULL, 'b' },
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{ "whitelisted", no_argument, NULL, 'g' },
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{ "replace-whitespace", no_argument, NULL, 'u' },
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{ "sg-version", required_argument, NULL, 's' },
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{ "verbose", no_argument, NULL, 'v' },
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{ "version", no_argument, NULL, 'V' }, /* don't advertise -V */
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{ "export", no_argument, NULL, 'x' },
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{ "help", no_argument, NULL, 'h' },
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{}
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};
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static bool all_good = false;
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static bool dev_specified = false;
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static char config_file[MAX_PATH_LEN] = "/etc/scsi_id.config";
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static enum page_code default_page_code = PAGE_UNSPECIFIED;
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static int sg_version = 4;
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static bool reformat_serial = false;
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static bool export = false;
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static char vendor_str[64];
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static char model_str[64];
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static char vendor_enc_str[256];
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static char model_enc_str[256];
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static char revision_str[16];
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static char type_str[16];
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static void set_type(const char *from, char *to, size_t len)
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{
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int type_num;
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char *eptr;
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const char *type = "generic";
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type_num = strtoul(from, &eptr, 0);
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if (eptr != from) {
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switch (type_num) {
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case 0:
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type = "disk";
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break;
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case 1:
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type = "tape";
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break;
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case 4:
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type = "optical";
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break;
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case 5:
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type = "cd";
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break;
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case 7:
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type = "optical";
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break;
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case 0xe:
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type = "disk";
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break;
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case 0xf:
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type = "optical";
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break;
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default:
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break;
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}
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}
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strscpy(to, len, type);
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}
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/*
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* get_value:
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*
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* buf points to an '=' followed by a quoted string ("foo") or a string ending
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* with a space or ','.
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*
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* Return a pointer to the NUL terminated string, returns NULL if no
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* matches.
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*/
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static char *get_value(char **buffer)
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{
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static const char *quote_string = "\"\n";
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static const char *comma_string = ",\n";
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char *val;
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const char *end;
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if (**buffer == '"') {
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/*
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* skip leading quote, terminate when quote seen
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*/
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(*buffer)++;
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end = quote_string;
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} else {
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end = comma_string;
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}
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val = strsep(buffer, end);
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if (val && end == quote_string)
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/*
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* skip trailing quote
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*/
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(*buffer)++;
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while (isspace(**buffer))
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(*buffer)++;
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return val;
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}
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static int argc_count(char *opts)
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{
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int i = 0;
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while (*opts != '\0')
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if (*opts++ == ' ')
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i++;
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return i;
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}
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/*
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* get_file_options:
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*
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* If vendor == NULL, find a line in the config file with only "OPTIONS=";
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* if vendor and model are set find the first OPTIONS line in the config
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* file that matches. Set argc and argv to match the OPTIONS string.
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*
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* vendor and model can end in '\n'.
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*/
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static int get_file_options(struct udev *udev,
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const char *vendor, const char *model,
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int *argc, char ***newargv)
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{
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char *buffer;
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_cleanup_fclose_ FILE *f;
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char *buf;
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char *str1;
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char *vendor_in, *model_in, *options_in; /* read in from file */
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int lineno;
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int c;
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int retval = 0;
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f = fopen(config_file, "re");
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if (f == NULL) {
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if (errno == ENOENT)
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return 1;
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else {
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log_error("can't open %s: %m", config_file);
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return -1;
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}
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}
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/*
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* Allocate a buffer rather than put it on the stack so we can
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* keep it around to parse any options (any allocated newargv
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* points into this buffer for its strings).
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*/
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buffer = malloc(MAX_BUFFER_LEN);
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if (!buffer)
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return log_oom();
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*newargv = NULL;
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lineno = 0;
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while (1) {
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vendor_in = model_in = options_in = NULL;
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buf = fgets(buffer, MAX_BUFFER_LEN, f);
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if (buf == NULL)
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break;
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lineno++;
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if (buf[strlen(buffer) - 1] != '\n') {
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log_error("Config file line %d too long", lineno);
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break;
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}
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while (isspace(*buf))
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buf++;
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/* blank or all whitespace line */
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if (*buf == '\0')
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continue;
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/* comment line */
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if (*buf == '#')
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continue;
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str1 = strsep(&buf, "=");
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if (str1 && strcaseeq(str1, "VENDOR")) {
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str1 = get_value(&buf);
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if (!str1) {
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retval = log_oom();
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break;
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}
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vendor_in = str1;
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str1 = strsep(&buf, "=");
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if (str1 && strcaseeq(str1, "MODEL")) {
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str1 = get_value(&buf);
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if (!str1) {
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retval = log_oom();
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break;
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}
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model_in = str1;
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str1 = strsep(&buf, "=");
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}
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}
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if (str1 && strcaseeq(str1, "OPTIONS")) {
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str1 = get_value(&buf);
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if (!str1) {
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retval = log_oom();
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break;
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}
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options_in = str1;
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}
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/*
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* Only allow: [vendor=foo[,model=bar]]options=stuff
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*/
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if (!options_in || (!vendor_in && model_in)) {
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log_error("Error parsing config file line %d '%s'", lineno, buffer);
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retval = -1;
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break;
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}
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if (vendor == NULL) {
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if (vendor_in == NULL)
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break;
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} else if (vendor_in &&
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strneq(vendor, vendor_in, strlen(vendor_in)) &&
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(!model_in ||
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(strneq(model, model_in, strlen(model_in))))) {
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/*
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* Matched vendor and optionally model.
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*
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* Note: a short vendor_in or model_in can
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* give a partial match (that is FOO
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* matches FOOBAR).
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*/
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break;
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}
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}
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if (retval == 0) {
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if (vendor_in != NULL || model_in != NULL ||
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options_in != NULL) {
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/*
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* Something matched. Allocate newargv, and store
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* values found in options_in.
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*/
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strcpy(buffer, options_in);
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c = argc_count(buffer) + 2;
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*newargv = calloc(c, sizeof(**newargv));
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if (!*newargv) {
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retval = log_oom();
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} else {
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*argc = c;
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c = 0;
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/*
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* argv[0] at 0 is skipped by getopt, but
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* store the buffer address there for
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* later freeing
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*/
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(*newargv)[c] = buffer;
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for (c = 1; c < *argc; c++)
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(*newargv)[c] = strsep(&buffer, " \t");
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}
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} else {
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/* No matches */
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retval = 1;
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}
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}
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if (retval != 0)
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free(buffer);
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return retval;
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}
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static void help(void) {
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printf("Usage: scsi_id [OPTION...] DEVICE\n"
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" -d,--device= device node for SG_IO commands\n"
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" -f,--config= location of config file\n"
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" -p,--page=0x80|0x83|pre-spc3-83 SCSI page (0x80, 0x83, pre-spc3-83)\n"
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" -s,--sg-version=3|4 use SGv3 or SGv4\n"
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" -b,--blacklisted treat device as blacklisted\n"
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" -g,--whitelisted treat device as whitelisted\n"
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" -u,--replace-whitespace replace all whitespace by underscores\n"
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" -v,--verbose verbose logging\n"
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" --version print version\n"
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" -x,--export print values as environment keys\n"
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" -h,--help print this help text\n\n");
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}
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static int set_options(struct udev *udev,
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int argc, char **argv,
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char *maj_min_dev)
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{
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int option;
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/*
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* optind is a global extern used by getopt. Since we can call
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* set_options twice (once for command line, and once for config
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* file) we have to reset this back to 1.
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*/
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optind = 1;
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while ((option = getopt_long(argc, argv, "d:f:gp:uvVxh", options, NULL)) >= 0)
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switch (option) {
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case 'b':
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all_good = false;
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break;
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case 'd':
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dev_specified = true;
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strscpy(maj_min_dev, MAX_PATH_LEN, optarg);
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break;
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case 'f':
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strscpy(config_file, MAX_PATH_LEN, optarg);
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break;
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case 'g':
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all_good = true;
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break;
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case 'h':
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help();
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exit(0);
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case 'p':
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if (streq(optarg, "0x80"))
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default_page_code = PAGE_80;
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else if (streq(optarg, "0x83"))
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default_page_code = PAGE_83;
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else if (streq(optarg, "pre-spc3-83"))
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default_page_code = PAGE_83_PRE_SPC3;
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else {
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log_error("Unknown page code '%s'", optarg);
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return -1;
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}
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break;
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case 's':
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sg_version = atoi(optarg);
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if (sg_version < 3 || sg_version > 4) {
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log_error("Unknown SG version '%s'", optarg);
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return -1;
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}
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break;
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case 'u':
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reformat_serial = true;
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break;
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case 'v':
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log_set_target(LOG_TARGET_CONSOLE);
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log_set_max_level(LOG_DEBUG);
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log_open();
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break;
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case 'V':
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printf("%s\n", VERSION);
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exit(0);
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case 'x':
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export = true;
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break;
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case '?':
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return -1;
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default:
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assert_not_reached("Unknown option");
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}
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if (optind < argc && !dev_specified) {
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dev_specified = true;
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strscpy(maj_min_dev, MAX_PATH_LEN, argv[optind]);
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}
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return 0;
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}
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static int per_dev_options(struct udev *udev,
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struct scsi_id_device *dev_scsi, int *good_bad, int *page_code)
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{
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int retval;
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int newargc;
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char **newargv = NULL;
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int option;
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*good_bad = all_good;
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*page_code = default_page_code;
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retval = get_file_options(udev, vendor_str, model_str, &newargc, &newargv);
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optind = 1; /* reset this global extern */
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while (retval == 0) {
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option = getopt_long(newargc, newargv, "bgp:", options, NULL);
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if (option == -1)
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break;
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switch (option) {
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case 'b':
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*good_bad = 0;
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break;
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case 'g':
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*good_bad = 1;
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break;
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case 'p':
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if (streq(optarg, "0x80")) {
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*page_code = PAGE_80;
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} else if (streq(optarg, "0x83")) {
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*page_code = PAGE_83;
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} else if (streq(optarg, "pre-spc3-83")) {
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*page_code = PAGE_83_PRE_SPC3;
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} else {
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log_error("Unknown page code '%s'", optarg);
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retval = -1;
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}
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break;
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default:
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log_error("Unknown or bad option '%c' (0x%x)", option, option);
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retval = -1;
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break;
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}
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}
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if (newargv) {
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free(newargv[0]);
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free(newargv);
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}
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return retval;
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}
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static int set_inq_values(struct udev *udev, struct scsi_id_device *dev_scsi, const char *path)
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{
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int retval;
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dev_scsi->use_sg = sg_version;
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retval = scsi_std_inquiry(udev, dev_scsi, path);
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if (retval)
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return retval;
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udev_util_encode_string(dev_scsi->vendor, vendor_enc_str, sizeof(vendor_enc_str));
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udev_util_encode_string(dev_scsi->model, model_enc_str, sizeof(model_enc_str));
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util_replace_whitespace(dev_scsi->vendor, vendor_str, sizeof(vendor_str));
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util_replace_chars(vendor_str, NULL);
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util_replace_whitespace(dev_scsi->model, model_str, sizeof(model_str));
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util_replace_chars(model_str, NULL);
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set_type(dev_scsi->type, type_str, sizeof(type_str));
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util_replace_whitespace(dev_scsi->revision, revision_str, sizeof(revision_str));
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util_replace_chars(revision_str, NULL);
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return 0;
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}
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/*
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* scsi_id: try to get an id, if one is found, printf it to stdout.
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* returns a value passed to exit() - 0 if printed an id, else 1.
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*/
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static int scsi_id(struct udev *udev, char *maj_min_dev)
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{
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struct scsi_id_device dev_scsi = {};
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int good_dev;
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int page_code;
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int retval = 0;
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if (set_inq_values(udev, &dev_scsi, maj_min_dev) < 0) {
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retval = 1;
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goto out;
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}
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/* get per device (vendor + model) options from the config file */
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per_dev_options(udev, &dev_scsi, &good_dev, &page_code);
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if (!good_dev) {
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retval = 1;
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goto out;
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}
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/* read serial number from mode pages (no values for optical drives) */
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scsi_get_serial(udev, &dev_scsi, maj_min_dev, page_code, MAX_SERIAL_LEN);
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if (export) {
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char serial_str[MAX_SERIAL_LEN];
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printf("ID_SCSI=1\n");
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printf("ID_VENDOR=%s\n", vendor_str);
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printf("ID_VENDOR_ENC=%s\n", vendor_enc_str);
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printf("ID_MODEL=%s\n", model_str);
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printf("ID_MODEL_ENC=%s\n", model_enc_str);
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printf("ID_REVISION=%s\n", revision_str);
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printf("ID_TYPE=%s\n", type_str);
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if (dev_scsi.serial[0] != '\0') {
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util_replace_whitespace(dev_scsi.serial, serial_str, sizeof(serial_str));
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util_replace_chars(serial_str, NULL);
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printf("ID_SERIAL=%s\n", serial_str);
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util_replace_whitespace(dev_scsi.serial_short, serial_str, sizeof(serial_str));
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util_replace_chars(serial_str, NULL);
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printf("ID_SERIAL_SHORT=%s\n", serial_str);
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}
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if (dev_scsi.wwn[0] != '\0') {
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printf("ID_WWN=0x%s\n", dev_scsi.wwn);
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if (dev_scsi.wwn_vendor_extension[0] != '\0') {
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printf("ID_WWN_VENDOR_EXTENSION=0x%s\n", dev_scsi.wwn_vendor_extension);
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printf("ID_WWN_WITH_EXTENSION=0x%s%s\n", dev_scsi.wwn, dev_scsi.wwn_vendor_extension);
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} else {
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printf("ID_WWN_WITH_EXTENSION=0x%s\n", dev_scsi.wwn);
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}
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}
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|
if (dev_scsi.tgpt_group[0] != '\0') {
|
|
printf("ID_TARGET_PORT=%s\n", dev_scsi.tgpt_group);
|
|
}
|
|
if (dev_scsi.unit_serial_number[0] != '\0') {
|
|
printf("ID_SCSI_SERIAL=%s\n", dev_scsi.unit_serial_number);
|
|
}
|
|
goto out;
|
|
}
|
|
|
|
if (dev_scsi.serial[0] == '\0') {
|
|
retval = 1;
|
|
goto out;
|
|
}
|
|
|
|
if (reformat_serial) {
|
|
char serial_str[MAX_SERIAL_LEN];
|
|
|
|
util_replace_whitespace(dev_scsi.serial, serial_str, sizeof(serial_str));
|
|
util_replace_chars(serial_str, NULL);
|
|
printf("%s\n", serial_str);
|
|
goto out;
|
|
}
|
|
|
|
printf("%s\n", dev_scsi.serial);
|
|
out:
|
|
return retval;
|
|
}
|
|
|
|
int main(int argc, char **argv)
|
|
{
|
|
_cleanup_udev_unref_ struct udev *udev;
|
|
int retval = 0;
|
|
char maj_min_dev[MAX_PATH_LEN];
|
|
int newargc;
|
|
char **newargv = NULL;
|
|
|
|
log_parse_environment();
|
|
log_open();
|
|
|
|
udev = udev_new();
|
|
if (udev == NULL)
|
|
goto exit;
|
|
|
|
/*
|
|
* Get config file options.
|
|
*/
|
|
retval = get_file_options(udev, NULL, NULL, &newargc, &newargv);
|
|
if (retval < 0) {
|
|
retval = 1;
|
|
goto exit;
|
|
}
|
|
if (retval == 0) {
|
|
assert(newargv);
|
|
|
|
if (set_options(udev, newargc, newargv, maj_min_dev) < 0) {
|
|
retval = 2;
|
|
goto exit;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Get command line options (overriding any config file settings).
|
|
*/
|
|
if (set_options(udev, argc, argv, maj_min_dev) < 0)
|
|
exit(1);
|
|
|
|
if (!dev_specified) {
|
|
log_error("no device specified");
|
|
retval = 1;
|
|
goto exit;
|
|
}
|
|
|
|
retval = scsi_id(udev, maj_min_dev);
|
|
|
|
exit:
|
|
if (newargv) {
|
|
free(newargv[0]);
|
|
free(newargv);
|
|
}
|
|
log_close();
|
|
return retval;
|
|
}
|