| #include <stdio.h> |
| #include <stdlib.h> |
| #include <unistd.h> |
| #include <string.h> |
| #include <fcntl.h> |
| #include <getopt.h> |
| |
| #ifdef HAVE_CONFIG_H |
| #include "config.h" |
| #endif |
| #include "sg_lib.h" |
| #include "sg_cmds_basic.h" |
| |
| /* |
| * Copyright (C) 1999-2007 D. Gilbert |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2, or (at your option) |
| * any later version. |
| |
| Start/Stop parameter by Kurt Garloff <garloff at suse dot de>, 6/2000 |
| Sync cache parameter by Kurt Garloff <garloff at suse dot de>, 1/2001 |
| Guard block device answering sg's ioctls. |
| <dgilbert at interlog dot com> 12/2002 |
| Convert to SG_IO ioctl so can use sg or block devices in 2.6.* 3/2003 |
| |
| This utility was written for the Linux 2.4 kernel series. It should |
| now build for the Linux 2.6 kernel series and various other Operating |
| Systems. |
| |
| */ |
| |
| static char * version_str = "0.55 20070714"; |
| |
| static struct option long_options[] = { |
| {"eject", 0, 0, 'e'}, |
| {"fl", 1, 0, 'f'}, |
| {"help", 0, 0, 'h'}, |
| {"immed", 0, 0, 'i'}, |
| {"load", 0, 0, 'l'}, |
| {"loej", 0, 0, 'L'}, |
| {"new", 0, 0, 'N'}, |
| {"old", 0, 0, 'O'}, |
| {"pc", 1, 0, 'p'}, |
| {"start", 0, 0, 's'}, |
| {"stop", 0, 0, 'S'}, |
| {"verbose", 0, 0, 'v'}, |
| {"version", 0, 0, 'V'}, |
| {0, 0, 0, 0}, |
| }; |
| |
| struct opts_t { |
| int do_eject; |
| int do_fl; |
| int do_help; |
| int do_immed; |
| int do_load; |
| int do_loej; |
| int do_pc; |
| int do_start; |
| int do_stop; |
| int do_verbose; |
| int do_version; |
| const char * device_name; |
| int opt_new; |
| }; |
| |
| void usage() |
| { |
| fprintf(stderr, "Usage: sg_start [--eject] [--fl=FL] [--help] " |
| "[--immed] [--load] [--loej]\n" |
| " [--pc=PC] [--start] [--stop] " |
| "[--verbose] [--version]\n" |
| " DEVICE\n" |
| " where:\n" |
| " --eject|-e stop unit then eject the medium\n" |
| " --fl=FL|-f FL format layer number (mmc5)\n" |
| " --help|-h print usage message then exit\n" |
| " --immed|-i device should return control after " |
| "receiving cdb,\n" |
| " default action is to wait until action " |
| "is complete\n" |
| " --load|-l load medium then start the unit\n" |
| " --loej|-L load or eject, corresponds to LOEJ bit " |
| "in cdb;\n" |
| " load when START bit also set, else " |
| "eject\n" |
| " --pc=PC|-p PC power conditions: 0 (default) -> no " |
| "power condition,\n" |
| " 1 -> active, 2 -> idle, 3 -> standby, " |
| "5 -> sleep (MMC)\n" |
| " --start|-s start unit, corresponds to START bit " |
| "in cdb,\n" |
| " default (START=1) if no other options " |
| "given\n" |
| " --stop|-S stop unit (e.g. spin down disk)\n" |
| " --verbose|-v increase verbosity\n" |
| " --version|-V print version string then exit\n\n" |
| " Example: 'sg_start --stop /dev/sdb' stops unit\n" |
| " 'sg_start --eject /dev/scd0' stops unit and " |
| "ejects medium\n\n" |
| "Performs a SCSI START STOP UNIT command\n" |
| ); |
| } |
| |
| void usage_old() |
| { |
| fprintf(stderr, "Usage: sg_start [0] [1] [--eject] [--fl=FL] " |
| "[-i] [--imm=0|1]\n" |
| " [--load] [--loej] [--pc=PC] [--start] " |
| "[--stop] [-v] [-V]\n" |
| " DEVICE\n" |
| " where:\n" |
| " 0 stop unit (e.g. spin down a disk or a " |
| "cd/dvd)\n" |
| " 1 start unit (e.g. spin up a disk or a " |
| "cd/dvd)\n" |
| " --eject stop then eject the medium\n" |
| " --fl=FL format layer number (mmc5)\n" |
| " -i return immediately (same as '--imm=1')\n" |
| " --imm=0|1 0->await completion(def), 1->return " |
| "immediately\n" |
| " --load load then start the medium\n" |
| " --loej load the medium if '-start' option is " |
| "also given\n" |
| " or stop unit and eject\n" |
| " --pc=PC power conditions (in hex, default 0 -> no " |
| "power condition)\n" |
| " 1 -> active, 2 -> idle, 3 -> standby, " |
| "5 -> sleep (MMC)\n" |
| " --start start unit (same as '1'), default " |
| "action\n" |
| " --stop stop unit (same as '0')\n" |
| " -v verbose (print out SCSI commands)\n" |
| " -V print version string then exit\n\n" |
| " Example: 'sg_start --stop /dev/sdb' stops unit\n" |
| " 'sg_start --eject /dev/scd0' stops unit and " |
| "ejects medium\n\n" |
| "Performs a SCSI START STOP UNIT command\n" |
| ); |
| } |
| |
| static int process_cl_new(struct opts_t * optsp, int argc, char * argv[]) |
| { |
| int c, n, err; |
| |
| while (1) { |
| int option_index = 0; |
| |
| c = getopt_long(argc, argv, "ef:hilLNOp:sSvV", long_options, |
| &option_index); |
| if (c == -1) |
| break; |
| |
| switch (c) { |
| case 'e': |
| ++optsp->do_eject; |
| ++optsp->do_loej; |
| break; |
| case 'f': |
| n = sg_get_num(optarg); |
| if ((n < 0) || (n > 3)) { |
| fprintf(stderr, "bad argument to '--fl='\n"); |
| usage(); |
| return SG_LIB_SYNTAX_ERROR; |
| } |
| ++optsp->do_loej; |
| ++optsp->do_start; |
| optsp->do_fl = n; |
| break; |
| case 'h': |
| case '?': |
| ++optsp->do_help; |
| break; |
| case 'i': |
| ++optsp->do_immed; |
| break; |
| case 'l': |
| ++optsp->do_load; |
| ++optsp->do_loej; |
| break; |
| case 'L': |
| ++optsp->do_loej; |
| break; |
| case 'N': |
| break; /* ignore */ |
| case 'O': |
| optsp->opt_new = 0; |
| return 0; |
| case 'p': |
| n = sg_get_num(optarg); |
| if ((n < 0) || (n > 15)) { |
| fprintf(stderr, "bad argument to '--pc='\n"); |
| usage(); |
| return SG_LIB_SYNTAX_ERROR; |
| } |
| optsp->do_pc = n; |
| break; |
| case 's': |
| ++optsp->do_start; |
| break; |
| case 'S': |
| ++optsp->do_stop; |
| break; |
| case 'v': |
| ++optsp->do_verbose; |
| break; |
| case 'V': |
| ++optsp->do_version; |
| break; |
| default: |
| fprintf(stderr, "unrecognised option code %c [0x%x]\n", c, c); |
| if (optsp->do_help) |
| break; |
| usage(); |
| return SG_LIB_SYNTAX_ERROR; |
| } |
| } |
| err = 0; |
| for (; optind < argc; ++optind) { |
| if (1 == strlen(argv[optind])) { |
| if (0 == strcmp("0", argv[optind])) { |
| ++optsp->do_stop; |
| continue; |
| } else if (0 == strcmp("1", argv[optind])) { |
| ++optsp->do_start; |
| continue; |
| } |
| } |
| if (NULL == optsp->device_name) |
| optsp->device_name = argv[optind]; |
| else { |
| fprintf(stderr, "Unexpected extra argument: %s\n", argv[optind]); |
| ++err; |
| } |
| } |
| if (err) { |
| usage(); |
| return SG_LIB_SYNTAX_ERROR; |
| } else |
| return 0; |
| } |
| |
| static int process_cl_old(struct opts_t * optsp, int argc, char * argv[]) |
| { |
| int k, jmp_out, plen, num; |
| int ambigu = 0; |
| int startstop = -1; |
| unsigned int u; |
| const char * cp; |
| |
| for (k = 1; k < argc; ++k) { |
| cp = argv[k]; |
| plen = strlen(cp); |
| if (plen <= 0) |
| continue; |
| if ('-' == *cp) { |
| for (--plen, ++cp, jmp_out = 0; plen > 0; |
| --plen, ++cp) { |
| switch (*cp) { |
| case 'i': |
| if ('\0' == *(cp + 1)) |
| optsp->do_immed = 1; |
| else |
| jmp_out = 1; |
| break; |
| case 'v': |
| ++optsp->do_verbose; |
| break; |
| case 'V': |
| ++optsp->do_version; |
| break; |
| case 'h': |
| case '?': |
| ++optsp->do_help; |
| break; |
| case 'N': |
| optsp->opt_new = 1; |
| return 0; |
| case 'O': |
| break; |
| case '-': |
| ++cp; |
| --plen; |
| jmp_out = 1; |
| break; |
| default: |
| jmp_out = 1; |
| break; |
| } |
| if (jmp_out) |
| break; |
| } |
| if (plen <= 0) |
| continue; |
| |
| if (0 == strncmp(cp, "eject", 5)) { |
| optsp->do_loej = 1; |
| if (startstop == 1) |
| ambigu = 1; |
| else |
| startstop = 0; |
| } else if (0 == strncmp("fl=", cp, 3)) { |
| num = sscanf(cp + 3, "%x", &u); |
| if (1 != num) { |
| fprintf(stderr, "Bad value after 'fl=' option\n"); |
| usage_old(); |
| return SG_LIB_SYNTAX_ERROR; |
| } |
| startstop = 1; |
| optsp->do_loej = 1; |
| optsp->do_fl = u; |
| } else if (0 == strncmp("imm=", cp, 4)) { |
| num = sscanf(cp + 4, "%x", &u); |
| if ((1 != num) || (u > 1)) { |
| fprintf(stderr, "Bad value after 'imm=' option\n"); |
| usage_old(); |
| return SG_LIB_SYNTAX_ERROR; |
| } |
| optsp->do_immed = u; |
| } else if (0 == strncmp(cp, "load", 4)) { |
| optsp->do_loej = 1; |
| if (startstop == 0) |
| ambigu = 1; |
| else |
| startstop = 1; |
| } else if (0 == strncmp(cp, "loej", 4)) |
| optsp->do_loej = 1; |
| else if (0 == strncmp("pc=", cp, 3)) { |
| num = sscanf(cp + 3, "%x", &u); |
| if ((1 != num) || (u > 15)) { |
| fprintf(stderr, "Bad value after after 'pc=' option\n"); |
| usage_old(); |
| return SG_LIB_SYNTAX_ERROR; |
| } |
| optsp->do_pc = u; |
| } else if (0 == strncmp(cp, "start", 5)) { |
| if (startstop == 0) |
| ambigu = 1; |
| else |
| startstop = 1; |
| } else if (0 == strncmp(cp, "stop", 4)) { |
| if (startstop == 1) |
| ambigu = 1; |
| else |
| startstop = 0; |
| } else if (0 == strncmp(cp, "old", 3)) |
| ; |
| else if (jmp_out) { |
| fprintf(stderr, "Unrecognized option: %s\n", cp); |
| usage_old(); |
| return SG_LIB_SYNTAX_ERROR; |
| } |
| } else if (0 == strcmp("0", cp)) { |
| if (1 == startstop) |
| ambigu = 1; |
| else |
| startstop = 0; |
| } else if (0 == strcmp("1", cp)) { |
| if (0 == startstop) |
| ambigu = 1; |
| else |
| startstop = 1; |
| } else if (0 == optsp->device_name) |
| optsp->device_name = cp; |
| else { |
| fprintf(stderr, "too many arguments, got: %s, not " |
| "expecting: %s\n", optsp->device_name, cp); |
| usage_old(); |
| return SG_LIB_SYNTAX_ERROR; |
| } |
| if (ambigu) { |
| fprintf(stderr, "please, only one of 0, 1, --eject, " |
| "--load, --start or --stop\n"); |
| usage_old(); |
| return SG_LIB_SYNTAX_ERROR; |
| } else if (0 == startstop) |
| ++optsp->do_stop; |
| else if (1 == startstop) |
| ++optsp->do_start; |
| } |
| return 0; |
| } |
| |
| static int process_cl(struct opts_t * optsp, int argc, char * argv[]) |
| { |
| int res; |
| char * cp; |
| |
| cp = getenv("SG3_UTILS_OLD_OPTS"); |
| if (cp) { |
| optsp->opt_new = 0; |
| res = process_cl_old(optsp, argc, argv); |
| if ((0 == res) && optsp->opt_new) |
| res = process_cl_new(optsp, argc, argv); |
| } else { |
| optsp->opt_new = 1; |
| res = process_cl_new(optsp, argc, argv); |
| if ((0 == res) && (0 == optsp->opt_new)) |
| res = process_cl_old(optsp, argc, argv); |
| } |
| return res; |
| } |
| |
| |
| int main(int argc, char * argv[]) |
| { |
| int fd, res; |
| int ret = 0; |
| struct opts_t opts; |
| |
| memset(&opts, 0, sizeof(opts)); |
| opts.do_fl = -1; /* only when >= 0 set FL bit */ |
| res = process_cl(&opts, argc, argv); |
| if (res) |
| return SG_LIB_SYNTAX_ERROR; |
| if (opts.do_help) { |
| if (opts.opt_new) |
| usage(); |
| else |
| usage_old(); |
| return 0; |
| } |
| if (opts.do_version) { |
| fprintf(stderr, "Version string: %s\n", version_str); |
| return 0; |
| } |
| |
| if (opts.do_start && opts.do_stop) { |
| fprintf(stderr, "Ambiguous to give both '--start' and '--stop'\n"); |
| return SG_LIB_SYNTAX_ERROR; |
| } |
| if (opts.do_load && opts.do_eject) { |
| fprintf(stderr, "Ambiguous to give both '--load' and '--eject'\n"); |
| return SG_LIB_SYNTAX_ERROR; |
| } |
| if (opts.do_load) |
| opts.do_start = 1; |
| else if ((opts.do_eject) || (opts.do_stop)) |
| opts.do_start = 0; |
| else if (opts.opt_new && opts.do_loej && (0 == opts.do_start)) |
| opts.do_start = 1; /* --loej alone in new interface is load */ |
| else if ((0 == opts.do_loej) && (-1 == opts.do_fl) && (0 == opts.do_pc)) |
| opts.do_start = 1; |
| /* default action is to start when no other active options */ |
| |
| if (0 == opts.device_name) { |
| fprintf(stderr, "No DEVICE argument given\n"); |
| if (opts.opt_new) |
| usage(); |
| else |
| usage_old(); |
| return SG_LIB_SYNTAX_ERROR; |
| } |
| |
| if (opts.do_fl >= 0) { |
| if (opts.do_start == 0) { |
| fprintf(stderr, "Giving '--fl=FL' with '--stop' (or " |
| "'--eject') is invalid\n"); |
| return SG_LIB_SYNTAX_ERROR; |
| } |
| if (opts.do_pc > 0) { |
| fprintf(stderr, "Giving '--fl=FL' with '--pc=PC' " |
| "when PC is non-zero is invalid\n"); |
| return SG_LIB_SYNTAX_ERROR; |
| } |
| } |
| |
| fd = sg_cmds_open_device(opts.device_name, 0 /* rw */, opts.do_verbose); |
| if (fd < 0) { |
| fprintf(stderr, "Error trying to open %s: %s\n", |
| opts.device_name, safe_strerror(-fd)); |
| return SG_LIB_FILE_ERROR; |
| } |
| |
| res = 0; |
| if (opts.do_fl >= 0) |
| res = sg_ll_start_stop_unit(fd, opts.do_immed, opts.do_fl, 0 /* pc */, |
| 1 /* fl */, 1 /* loej */, |
| 1 /*start */, 1 /* noisy */, |
| opts.do_verbose); |
| else if (opts.do_pc > 0) |
| res = sg_ll_start_stop_unit(fd, opts.do_immed, 0, opts.do_pc, 0, 0, |
| 0, 1, opts.do_verbose); |
| else |
| res = sg_ll_start_stop_unit(fd, opts.do_immed, 0, 0, 0, opts.do_loej, |
| opts.do_start, 1, opts.do_verbose); |
| ret = res; |
| if (res) { |
| if (opts.do_verbose < 2) { |
| if (SG_LIB_CAT_INVALID_OP == res) |
| fprintf(stderr, "command not supported\n"); |
| else if (SG_LIB_CAT_NOT_READY == res) |
| fprintf(stderr, "device not ready\n"); |
| else if (SG_LIB_CAT_UNIT_ATTENTION == res) |
| fprintf(stderr, "unit attention\n"); |
| else if (SG_LIB_CAT_ABORTED_COMMAND == res) |
| fprintf(stderr, "aborted command\n"); |
| else if (SG_LIB_CAT_ILLEGAL_REQ == res) |
| fprintf(stderr, "invalid field in cdb\n"); |
| } |
| fprintf(stderr, "START STOP UNIT command failed\n"); |
| } |
| res = sg_cmds_close_device(fd); |
| if ((res < 0) && (0 == ret)) |
| return SG_LIB_FILE_ERROR; |
| return (ret >= 0) ? ret : SG_LIB_CAT_OTHER; |
| } |
