mirror of
https://github.com/systemd/systemd-stable.git
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759 lines
16 KiB
C
759 lines
16 KiB
C
/*
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* scsi_id.c
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*
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* Main section of the scsi_id program
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*
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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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* Author:
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* Patrick Mansfield<patmans@us.ibm.com>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation version 2 of the License.
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*/
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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 <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 <syslog.h>
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#include <stdarg.h>
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#include <ctype.h>
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#include <sys/stat.h>
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#include "../../udev.h"
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#include "scsi_id.h"
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#include "scsi_id_version.h"
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/* temporary names for mknod */
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#define TMP_DIR "/dev"
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#define TMP_PREFIX "tmp-scsi"
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static const char short_options[] = "abd:f:gip:s:uvVx";
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static const char dev_short_options[] = "bgp:";
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static int all_good;
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static int always_info;
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static int dev_specified;
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static int sys_specified;
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static char config_file[MAX_PATH_LEN] = SCSI_ID_CONFIG_FILE;
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static int display_bus_id;
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static enum page_code default_page_code;
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static int use_stderr;
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static int debug;
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static int hotplug_mode;
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static int reformat_serial;
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static int export;
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static char vendor_str[64];
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static char model_str[64];
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static char revision_str[16];
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static char type_str[16];
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#ifdef USE_LOG
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void log_message(int priority, const char *format, ...)
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{
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va_list args;
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static int udev_log = -1;
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if (udev_log == -1) {
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const char *value;
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value = getenv("UDEV_LOG");
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if (value)
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udev_log = log_priority(value);
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else
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udev_log = LOG_ERR;
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}
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if (priority > udev_log)
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return;
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va_start(args, format);
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vsyslog(priority, format, args);
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va_end(args);
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}
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#endif
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static void set_str(char *to, const char *from, size_t count)
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{
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size_t i, j, len;
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/* strip trailing whitespace */
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len = strnlen(from, count);
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while (len && isspace(from[len-1]))
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len--;
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/* strip leading whitespace */
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i = 0;
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while (isspace(from[i]) && (i < len))
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i++;
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j = 0;
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while (i < len) {
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/* substitute multiple whitespace */
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if (isspace(from[i])) {
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while (isspace(from[i]))
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i++;
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to[j++] = '_';
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}
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/* skip chars */
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if (from[i] == '/') {
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i++;
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continue;
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}
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to[j++] = from[i++];
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}
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to[j] = '\0';
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}
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static void set_type(char *to, const char *from, size_t len)
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{
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int type_num;
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char *eptr;
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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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strncpy(to, type, len);
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to[len-1] = '\0';
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}
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static int create_tmp_dev(const char *devpath, char *tmpdev, int dev_type)
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{
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unsigned int maj, min;
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const char *attr;
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dbg("%s", devpath);
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attr = sysfs_attr_get_value(devpath, "dev");
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if (attr == NULL) {
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dbg("%s: could not get dev attribute: %s", devpath, strerror(errno));
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return -1;
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}
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dbg("dev value %s", attr);
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if (sscanf(attr, "%u:%u", &maj, &min) != 2) {
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err("%s: invalid dev major/minor", devpath);
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return -1;
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}
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snprintf(tmpdev, MAX_PATH_LEN, "%s/%s-maj%d-min%d-%u",
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TMP_DIR, TMP_PREFIX, maj, min, getpid());
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dbg("tmpdev '%s'", tmpdev);
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if (mknod(tmpdev, 0600 | dev_type, makedev(maj, min))) {
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err("mknod failed: %s", strerror(errno));
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return -1;
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}
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return 0;
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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 char *quote_string = "\"\n";
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static char *comma_string = ",\n";
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char *val;
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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(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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FILE *fd;
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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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dbg("vendor='%s'; model='%s'\n", vendor, model);
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fd = fopen(config_file, "r");
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if (fd == NULL) {
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dbg("can't open %s\n", config_file);
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if (errno == ENOENT) {
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return 1;
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} else {
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err("can't open %s: %s", config_file, strerror(errno));
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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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err("Can't allocate memory.");
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return -1;
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}
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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, fd);
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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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info("Config file line %d too long.\n", 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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dbg("lineno %d: '%s'\n", lineno, buf);
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str1 = strsep(&buf, "=");
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if (str1 && strcasecmp(str1, "VENDOR") == 0) {
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str1 = get_value(&buf);
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if (!str1) {
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retval = -1;
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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 && strcasecmp(str1, "MODEL") == 0) {
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str1 = get_value(&buf);
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if (!str1) {
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retval = -1;
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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 && strcasecmp(str1, "OPTIONS") == 0) {
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str1 = get_value(&buf);
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if (!str1) {
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retval = -1;
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break;
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}
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options_in = str1;
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}
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dbg("config file line %d:"
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" vendor '%s'; model '%s'; options '%s'\n",
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lineno, vendor_in, model_in, options_in);
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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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info("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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dbg("matched global option\n");
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break;
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}
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} else if ((vendor_in && strncmp(vendor, vendor_in,
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strlen(vendor_in)) == 0) &&
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(!model_in || (strncmp(model, model_in,
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strlen(model_in)) == 0))) {
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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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dbg("matched vendor/model\n");
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break;
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} else {
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dbg("no match\n");
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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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err("Can't allocate memory.");
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retval = -1;
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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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* alter 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, " ");
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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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fclose(fd);
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return retval;
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}
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static int set_options(int argc, char **argv, const char *short_opts,
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char *target, 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 (1) {
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option = getopt(argc, argv, short_opts);
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if (option == -1)
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break;
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if (optarg)
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dbg("option '%c' arg '%s'\n", option, optarg);
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else
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dbg("option '%c'\n", option);
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switch (option) {
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case 'a':
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always_info = 1;
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break;
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case 'b':
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all_good = 0;
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break;
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case 'd':
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dev_specified = 1;
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strncpy(maj_min_dev, optarg, MAX_PATH_LEN);
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maj_min_dev[MAX_PATH_LEN-1] = '\0';
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break;
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case 'e':
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use_stderr = 1;
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break;
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case 'f':
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strncpy(config_file, optarg, MAX_PATH_LEN);
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config_file[MAX_PATH_LEN-1] = '\0';
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break;
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case 'g':
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all_good = 1;
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break;
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case 'i':
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display_bus_id = 1;
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break;
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case 'p':
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if (strcmp(optarg, "0x80") == 0) {
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default_page_code = PAGE_80;
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} else if (strcmp(optarg, "0x83") == 0) {
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default_page_code = PAGE_83;
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} else if (strcmp(optarg, "pre-spc3-83") == 0) {
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default_page_code = PAGE_83_PRE_SPC3;
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} else {
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info("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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sys_specified = 1;
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strncpy(target, optarg, MAX_PATH_LEN);
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target[MAX_PATH_LEN-1] = '\0';
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break;
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case 'u':
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reformat_serial = 1;
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break;
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case 'x':
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export = 1;
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break;
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case 'v':
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debug++;
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break;
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case 'V':
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info("scsi_id version: %s\n", SCSI_ID_VERSION);
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exit(0);
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break;
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default:
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info("Unknown or bad option '%c' (0x%x)", option, option);
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return -1;
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}
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}
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return 0;
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}
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static int per_dev_options(struct sysfs_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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const char *vendor, *model, *type;
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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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vendor = sysfs_attr_get_value(dev_scsi->devpath, "vendor");
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if (!vendor) {
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info("%s: cannot get vendor attribute", dev_scsi->devpath);
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return -1;
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}
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set_str(vendor_str, vendor, sizeof(vendor_str)-1);
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model = sysfs_attr_get_value(dev_scsi->devpath, "model");
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if (!model) {
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info("%s: cannot get model attribute\n", dev_scsi->devpath);
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return -1;
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}
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set_str(model_str, model, sizeof(model_str)-1);
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type = sysfs_attr_get_value(dev_scsi->devpath, "type");
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if (!type) {
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info("%s: cannot get type attribute", dev_scsi->devpath);
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return -1;
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}
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set_type(type_str, type, sizeof(type_str));
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type = sysfs_attr_get_value(dev_scsi->devpath, "rev");
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if (!type) {
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info("%s: cannot get type attribute\n", dev_scsi->devpath);
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return -1;
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}
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set_str(revision_str, type, sizeof(revision_str)-1);
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retval = get_file_options(vendor, model, &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(newargc, newargv, dev_short_options);
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if (option == -1)
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break;
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if (optarg)
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dbg("option '%c' arg '%s'\n", option, optarg);
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else
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dbg("option '%c'\n", option);
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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 (strcmp(optarg, "0x80") == 0) {
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*page_code = PAGE_80;
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} else if (strcmp(optarg, "0x83") == 0) {
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*page_code = PAGE_83;
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} else if (strcmp(optarg, "pre-spc3-83") == 0) {
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*page_code = PAGE_83_PRE_SPC3;
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} else {
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info("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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info("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);
|
|
}
|
|
return retval;
|
|
}
|
|
|
|
/*
|
|
* format_serial: replace to whitespaces by underscores for calling
|
|
* programs that use the serial for device naming (multipath, Suse
|
|
* naming, etc...)
|
|
*/
|
|
static void format_serial(char *serial)
|
|
{
|
|
char *p = serial, *q;
|
|
|
|
q = p;
|
|
while (*p != '\0') {
|
|
if (isspace(*p)) {
|
|
if (q > serial && q[-1] != '_') {
|
|
*q = '_';
|
|
q++;
|
|
}
|
|
} else {
|
|
*q = *p;
|
|
q++;
|
|
}
|
|
p++;
|
|
}
|
|
*q = '\0';
|
|
}
|
|
|
|
/*
|
|
* scsi_id: try to get an id, if one is found, printf it to stdout.
|
|
* returns a value passed to exit() - 0 if printed an id, else 1. This
|
|
* could be expanded, for example, if we want to report a failure like no
|
|
* memory etc. return 2, and return 1 for expected cases (like broken
|
|
* device found) that do not print an id.
|
|
*/
|
|
static int scsi_id(const char *devpath, char *maj_min_dev)
|
|
{
|
|
int retval;
|
|
int dev_type = 0;
|
|
struct sysfs_device *dev;
|
|
struct sysfs_device *dev_scsi;
|
|
int good_dev;
|
|
int page_code;
|
|
char serial[MAX_SERIAL_LEN];
|
|
char serial_short[MAX_SERIAL_LEN];
|
|
|
|
dbg("devpath %s\n", devpath);
|
|
|
|
dev = sysfs_device_get(devpath);
|
|
if (dev == NULL) {
|
|
err("unable to access '%s'", devpath);
|
|
return 1;
|
|
}
|
|
|
|
if (strcmp(dev->subsystem, "block") == 0)
|
|
dev_type = S_IFBLK;
|
|
else
|
|
dev_type = S_IFCHR;
|
|
|
|
/* get scsi parent device */
|
|
dev_scsi = sysfs_device_get_parent_with_subsystem(dev, "scsi");
|
|
if (dev_scsi == NULL) {
|
|
err("unable to access parent device of '%s'", devpath);
|
|
return 1;
|
|
}
|
|
|
|
/* mknod a temp dev to communicate with the device */
|
|
if (!dev_specified && create_tmp_dev(dev->devpath, maj_min_dev, dev_type)) {
|
|
dbg("create_tmp_dev failed\n");
|
|
return 1;
|
|
}
|
|
|
|
/* get per device (vendor + model) options from the config file */
|
|
retval = per_dev_options(dev_scsi, &good_dev, &page_code);
|
|
dbg("per dev options: good %d; page code 0x%x", good_dev, page_code);
|
|
|
|
if (!good_dev) {
|
|
retval = 1;
|
|
} else if (scsi_get_serial(dev_scsi, maj_min_dev, page_code,
|
|
serial, serial_short, MAX_SERIAL_LEN)) {
|
|
retval = always_info?0:1;
|
|
} else {
|
|
retval = 0;
|
|
}
|
|
if (!retval) {
|
|
if (export) {
|
|
char serial_str[MAX_SERIAL_LEN];
|
|
|
|
printf("ID_VENDOR=%s\n", vendor_str);
|
|
printf("ID_MODEL=%s\n", model_str);
|
|
printf("ID_REVISION=%s\n", revision_str);
|
|
set_str(serial_str, serial, sizeof(serial_str));
|
|
printf("ID_SERIAL=%s\n", serial_str);
|
|
set_str(serial_str, serial_short, sizeof(serial_str));
|
|
printf("ID_SERIAL_SHORT=%s\n", serial_str);
|
|
printf("ID_TYPE=%s\n", type_str);
|
|
printf("ID_BUS=scsi\n");
|
|
} else {
|
|
if (reformat_serial)
|
|
format_serial(serial);
|
|
if (display_bus_id)
|
|
printf("%s: ", dev_scsi->kernel);
|
|
printf("%s\n", serial);
|
|
}
|
|
dbg("%s\n", serial);
|
|
retval = 0;
|
|
}
|
|
|
|
if (!dev_specified)
|
|
unlink(maj_min_dev);
|
|
|
|
return retval;
|
|
}
|
|
|
|
int main(int argc, char **argv)
|
|
{
|
|
int retval = 0;
|
|
char devpath[MAX_PATH_LEN];
|
|
char maj_min_dev[MAX_PATH_LEN];
|
|
int newargc;
|
|
const char *env;
|
|
char **newargv;
|
|
|
|
logging_init("scsi_id");
|
|
sysfs_init();
|
|
dbg("argc is %d\n", argc);
|
|
|
|
/* sysfs path can be overridden for testing */
|
|
env = getenv("SYSFS_PATH");
|
|
if (env) {
|
|
strncpy(sysfs_path, env, sizeof(sysfs_path));
|
|
sysfs_path[sizeof(sysfs_path)-1] = '\0';
|
|
} else
|
|
strcpy(sysfs_path, "/sys");
|
|
|
|
env = getenv("DEVPATH");
|
|
if (env) {
|
|
hotplug_mode = 1;
|
|
sys_specified = 1;
|
|
strncpy(devpath, env, MAX_PATH_LEN);
|
|
devpath[sizeof(devpath)-1] = '\0';
|
|
}
|
|
|
|
/*
|
|
* Get config file options.
|
|
*/
|
|
newargv = NULL;
|
|
retval = get_file_options(NULL, NULL, &newargc, &newargv);
|
|
if (retval < 0) {
|
|
retval = 1;
|
|
goto exit;
|
|
}
|
|
if (newargv && (retval == 0)) {
|
|
if (set_options(newargc, newargv, short_options, devpath,
|
|
maj_min_dev) < 0) {
|
|
retval = 2;
|
|
goto exit;
|
|
}
|
|
free(newargv);
|
|
}
|
|
|
|
/*
|
|
* Get command line options (overriding any config file or DEVPATH
|
|
* settings).
|
|
*/
|
|
if (set_options(argc, argv, short_options, devpath, maj_min_dev) < 0)
|
|
exit(1);
|
|
|
|
if (!sys_specified) {
|
|
info("-s must be specified\n");
|
|
retval = 1;
|
|
goto exit;
|
|
}
|
|
|
|
retval = scsi_id(devpath, maj_min_dev);
|
|
|
|
exit:
|
|
sysfs_cleanup();
|
|
logging_close();
|
|
return retval;
|
|
}
|