X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=blobdiff_plain;f=extras%2Fcdrom_id%2Fcdrom_id.c;h=fd7d482f89a5ab131daed8f053becc64216249e8;hp=921e5346c920f2d10d168c9e97c58d4e196af3be;hb=45b1d780b960f3bcad84ae8a2702cdcf43b3e5cb;hpb=d3c8231e738dd286591c1becc2f327ed55ed89d1 diff --git a/extras/cdrom_id/cdrom_id.c b/extras/cdrom_id/cdrom_id.c index 921e5346c..fd7d482f8 100644 --- a/extras/cdrom_id/cdrom_id.c +++ b/extras/cdrom_id/cdrom_id.c @@ -1,7 +1,7 @@ /* * cdrom_id - optical drive and media information prober * - * Copyright (C) 2008 Kay Sievers + * Copyright (C) 2008-2010 Kay Sievers * * 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 @@ -30,6 +30,7 @@ #include #include #include +#include #include #include #include @@ -37,7 +38,8 @@ #include #include -#include "../../udev/udev.h" +#include "libudev.h" +#include "libudev-private.h" static int debug; @@ -54,63 +56,86 @@ static void log_fn(struct udev *udev, int priority, } /* device info */ -static unsigned int cd_cd_rom; -static unsigned int cd_cd_r; -static unsigned int cd_cd_rw; -static unsigned int cd_dvd_rom; -static unsigned int cd_dvd_r; -static unsigned int cd_dvd_rw; -static unsigned int cd_dvd_ram; -static unsigned int cd_dvd_plus_r; -static unsigned int cd_dvd_plus_rw; -static unsigned int cd_dvd_plus_r_dl; -static unsigned int cd_dvd_plus_rw_dl; -static unsigned int cd_bd; -static unsigned int cd_bd_r; -static unsigned int cd_bd_re; -static unsigned int cd_hddvd; -static unsigned int cd_hddvd_r; -static unsigned int cd_hddvd_rw; -static unsigned int cd_mo; -static unsigned int cd_mrw; -static unsigned int cd_mrw_w; +static unsigned int cd_cd_rom = 0; +static unsigned int cd_cd_r = 0; +static unsigned int cd_cd_rw = 0; +static unsigned int cd_dvd_rom = 0; +static unsigned int cd_dvd_r = 0; +static unsigned int cd_dvd_rw = 0; +static unsigned int cd_dvd_ram = 0; +static unsigned int cd_dvd_plus_r = 0; +static unsigned int cd_dvd_plus_rw = 0; +static unsigned int cd_dvd_plus_r_dl = 0; +static unsigned int cd_dvd_plus_rw_dl = 0; +static unsigned int cd_bd = 0; +static unsigned int cd_bd_r = 0; +static unsigned int cd_bd_re = 0; +static unsigned int cd_hddvd = 0; +static unsigned int cd_hddvd_r = 0; +static unsigned int cd_hddvd_rw = 0; +static unsigned int cd_mo = 0; +static unsigned int cd_mrw = 0; +static unsigned int cd_mrw_w = 0; /* media info */ -static unsigned int cd_media; -static unsigned int cd_media_cd_rom; -static unsigned int cd_media_cd_r; -static unsigned int cd_media_cd_rw; -static unsigned int cd_media_dvd_rom; -static unsigned int cd_media_dvd_r; -static unsigned int cd_media_dvd_rw; -static unsigned int cd_media_dvd_ram; -static unsigned int cd_media_dvd_plus_r; -static unsigned int cd_media_dvd_plus_rw; -static unsigned int cd_media_dvd_plus_r_dl; -static unsigned int cd_media_dvd_plus_rw_dl; -static unsigned int cd_media_bd; -static unsigned int cd_media_bd_r; -static unsigned int cd_media_bd_re; -static unsigned int cd_media_hddvd; -static unsigned int cd_media_hddvd_r; -static unsigned int cd_media_hddvd_rw; -static unsigned int cd_media_mo; -static unsigned int cd_media_mrw; -static unsigned int cd_media_mrw_w; - -static const char *cd_media_state; -static unsigned int cd_media_session_next; -static unsigned int cd_media_session_count; -static unsigned int cd_media_track_count; -static unsigned int cd_media_track_count_data; -static unsigned int cd_media_track_count_audio; -static unsigned long long int cd_media_session_last_offset; +static unsigned int cd_media = 0; +static unsigned int cd_media_cd_rom = 0; +static unsigned int cd_media_cd_r = 0; +static unsigned int cd_media_cd_rw = 0; +static unsigned int cd_media_dvd_rom = 0; +static unsigned int cd_media_dvd_r = 0; +static unsigned int cd_media_dvd_rw = 0; +static unsigned int cd_media_dvd_ram = 0; +static unsigned int cd_media_dvd_plus_r = 0; +static unsigned int cd_media_dvd_plus_rw = 0; +static unsigned int cd_media_dvd_plus_r_dl = 0; +static unsigned int cd_media_dvd_plus_rw_dl = 0; +static unsigned int cd_media_bd = 0; +static unsigned int cd_media_bd_r = 0; +static unsigned int cd_media_bd_re = 0; +static unsigned int cd_media_hddvd = 0; +static unsigned int cd_media_hddvd_r = 0; +static unsigned int cd_media_hddvd_rw = 0; +static unsigned int cd_media_mo = 0; +static unsigned int cd_media_mrw = 0; +static unsigned int cd_media_mrw_w = 0; + +static const char *cd_media_state = NULL; +static unsigned int cd_media_session_next = 0; +static unsigned int cd_media_session_count = 0; +static unsigned int cd_media_track_count = 0; +static unsigned int cd_media_track_count_data = 0; +static unsigned int cd_media_track_count_audio = 0; +static unsigned long long int cd_media_session_last_offset = 0; #define ERRCODE(s) ((((s)[2] & 0x0F) << 16) | ((s)[12] << 8) | ((s)[13])) #define SK(errcode) (((errcode) >> 16) & 0xF) #define ASC(errcode) (((errcode) >> 8) & 0xFF) #define ASCQ(errcode) ((errcode) & 0xFF) +static int is_mounted(const char *device) +{ + struct stat statbuf; + FILE *fp; + int maj, min; + int mounted = 0; + + if (stat(device, &statbuf) < 0) + return -ENODEV; + + fp = fopen("/proc/self/mountinfo", "r"); + if (fp == NULL) + return -ENOSYS; + while (fscanf(fp, "%*s %*s %i:%i %*[^\n]", &maj, &min) == 2) { + if (makedev(maj, min) == statbuf.st_rdev) { + mounted = 1; + break; + } + } + fclose(fp); + return mounted; +} + static void info_scsi_cmd_err(struct udev *udev, char *cmd, int err) { if (err == -1) { @@ -129,19 +154,22 @@ struct scsi_cmd { struct sg_io_hdr sg_io; }; -static void scsi_cmd_set(struct udev *udev, struct scsi_cmd *cmd, size_t i, int arg) +static void scsi_cmd_init(struct udev *udev, struct scsi_cmd *cmd, unsigned char *buf, size_t bufsize) +{ + memset(cmd, 0x00, sizeof(struct scsi_cmd)); + memset(buf, 0x00, bufsize); + cmd->cgc.quiet = 1; + cmd->cgc.sense = &cmd->_sense.s; + memset(&cmd->sg_io, 0, sizeof(cmd->sg_io)); + cmd->sg_io.interface_id = 'S'; + cmd->sg_io.mx_sb_len = sizeof(cmd->_sense); + cmd->sg_io.cmdp = cmd->cgc.cmd; + cmd->sg_io.sbp = cmd->_sense.u; + cmd->sg_io.flags = SG_FLAG_LUN_INHIBIT | SG_FLAG_DIRECT_IO; +} + +static void scsi_cmd_set(struct udev *udev, struct scsi_cmd *cmd, size_t i, unsigned char arg) { - if (i == 0) { - memset(cmd, 0x00, sizeof(struct scsi_cmd)); - cmd->cgc.quiet = 1; - cmd->cgc.sense = &cmd->_sense.s; - memset(&cmd->sg_io, 0, sizeof(cmd->sg_io)); - cmd->sg_io.interface_id = 'S'; - cmd->sg_io.mx_sb_len = sizeof(cmd->_sense); - cmd->sg_io.cmdp = cmd->cgc.cmd; - cmd->sg_io.sbp = cmd->_sense.u; - cmd->sg_io.flags = SG_FLAG_LUN_INHIBIT | SG_FLAG_DIRECT_IO; - } cmd->sg_io.cmd_len = i + 1; cmd->cgc.cmd[i] = arg; } @@ -172,27 +200,27 @@ static int scsi_cmd_run(struct udev *udev, struct scsi_cmd *cmd, int fd, unsigne static int cd_capability_compat(struct udev *udev, int fd) { - int capabilty; + int capability; - capabilty = ioctl(fd, CDROM_GET_CAPABILITY, NULL); - if (capabilty < 0) { + capability = ioctl(fd, CDROM_GET_CAPABILITY, NULL); + if (capability < 0) { info(udev, "CDROM_GET_CAPABILITY failed\n"); return -1; } - if (capabilty & CDC_CD_R) + if (capability & CDC_CD_R) cd_cd_r = 1; - if (capabilty & CDC_CD_RW) + if (capability & CDC_CD_RW) cd_cd_rw = 1; - if (capabilty & CDC_DVD) + if (capability & CDC_DVD) cd_dvd_rom = 1; - if (capabilty & CDC_DVD_R) + if (capability & CDC_DVD_R) cd_dvd_r = 1; - if (capabilty & CDC_DVD_RAM) + if (capability & CDC_DVD_RAM) cd_dvd_ram = 1; - if (capabilty & CDC_MRW) + if (capability & CDC_MRW) cd_mrw = 1; - if (capabilty & CDC_MRW_W) + if (capability & CDC_MRW_W) cd_mrw_w = 1; return 0; } @@ -212,11 +240,12 @@ static int cd_inquiry(struct udev *udev, int fd) { unsigned char inq[128]; int err; + scsi_cmd_init(udev, &sc, inq, sizeof(inq)); scsi_cmd_set(udev, &sc, 0, 0x12); scsi_cmd_set(udev, &sc, 4, 36); scsi_cmd_set(udev, &sc, 5, 0); err = scsi_cmd_run(udev, &sc, fd, inq, 36); - if ((err < 0)) { + if ((err != 0)) { info_scsi_cmd_err(udev, "INQUIRY", err); return -1; } @@ -230,174 +259,286 @@ static int cd_inquiry(struct udev *udev, int fd) { return 0; } -static int cd_profiles(struct udev *udev, int fd) +static int feature_profiles(struct udev *udev, const unsigned char *profiles, size_t size) { - struct scsi_cmd sc; - unsigned char header[8]; - unsigned char profiles[512]; - unsigned int cur_profile; - unsigned int len; unsigned int i; - int err; - - scsi_cmd_set(udev, &sc, 0, 0x46); - scsi_cmd_set(udev, &sc, 1, 0); - scsi_cmd_set(udev, &sc, 8, sizeof(header)); - scsi_cmd_set(udev, &sc, 9, 0); - err = scsi_cmd_run(udev, &sc, fd, header, sizeof(header)); - if ((err < 0)) { - info_scsi_cmd_err(udev, "GET CONFIGURATION", err); - return -1; - } - - len = 4 + (header[0] << 24 | header[1] << 16 | header[2] << 8 | header[3]); - info(udev, "GET CONFIGURATION: number of profiles %i\n", len); - if (len > sizeof(profiles)) { - info(udev, "invalid number of profiles\n"); - return -1; - } - - scsi_cmd_set(udev, &sc, 0, 0x46); - scsi_cmd_set(udev, &sc, 1, 1); - scsi_cmd_set(udev, &sc, 6, len >> 16); - scsi_cmd_set(udev, &sc, 7, len >> 8); - scsi_cmd_set(udev, &sc, 8, len); - scsi_cmd_set(udev, &sc, 9, 0); - err = scsi_cmd_run(udev, &sc, fd, profiles, len); - if ((err < 0)) { - info_scsi_cmd_err(udev, "GET CONFIGURATION", err); - return -1; - } - /* device profiles */ - for (i = 12; i < profiles[11]; i += 4) { - unsigned int profile = (profiles[i] << 8 | profiles[i + 1]); - if (profile == 0) - continue; - info(udev, "profile 0x%02x\n", profile); + for (i = 0; i+4 <= size; i += 4) { + int profile; + profile = profiles[i] << 8 | profiles[i+1]; switch (profile) { case 0x03: case 0x04: case 0x05: + info(udev, "profile 0x%02x mo\n", profile); cd_mo = 1; - break; + break; + case 0x08: + info(udev, "profile 0x%02x cd_rom\n", profile); + cd_cd_rom = 1; + break; + case 0x09: + info(udev, "profile 0x%02x cd_r\n", profile); + cd_cd_r = 1; + break; + case 0x0A: + info(udev, "profile 0x%02x cd_rw\n", profile); + cd_cd_rw = 1; + break; case 0x10: + info(udev, "profile 0x%02x dvd_rom\n", profile); cd_dvd_rom = 1; break; case 0x12: + info(udev, "profile 0x%02x dvd_ram\n", profile); cd_dvd_ram = 1; break; case 0x13: case 0x14: + info(udev, "profile 0x%02x dvd_rw\n", profile); cd_dvd_rw = 1; break; case 0x1B: + info(udev, "profile 0x%02x dvd_plus_r\n", profile); cd_dvd_plus_r = 1; break; case 0x1A: + info(udev, "profile 0x%02x dvd_plus_rw\n", profile); cd_dvd_plus_rw = 1; break; case 0x2A: + info(udev, "profile 0x%02x dvd_plus_rw_dl\n", profile); cd_dvd_plus_rw_dl = 1; break; case 0x2B: + info(udev, "profile 0x%02x dvd_plus_r_dl\n", profile); cd_dvd_plus_r_dl = 1; break; case 0x40: cd_bd = 1; + info(udev, "profile 0x%02x bd\n", profile); break; case 0x41: case 0x42: cd_bd_r = 1; + info(udev, "profile 0x%02x bd_r\n", profile); break; case 0x43: cd_bd_re = 1; + info(udev, "profile 0x%02x bd_re\n", profile); break; case 0x50: cd_hddvd = 1; + info(udev, "profile 0x%02x hddvd\n", profile); break; case 0x51: cd_hddvd_r = 1; + info(udev, "profile 0x%02x hddvd_r\n", profile); break; case 0x52: cd_hddvd_rw = 1; + info(udev, "profile 0x%02x hddvd_rw\n", profile); break; default: + info(udev, "profile 0x%02x \n", profile); break; } } + return 0; +} + +static int cd_profiles_old_mmc(struct udev *udev, int fd) +{ + struct scsi_cmd sc; + int err; + + unsigned char header[32]; - /* current media profile */ - cur_profile = header[6] << 8 | header[7]; - info(udev, "current profile 0x%02x\n", cur_profile); - if (cur_profile == 0) { + scsi_cmd_init(udev, &sc, header, sizeof(header)); + scsi_cmd_set(udev, &sc, 0, 0x51); + scsi_cmd_set(udev, &sc, 8, sizeof(header)); + scsi_cmd_set(udev, &sc, 9, 0); + err = scsi_cmd_run(udev, &sc, fd, header, sizeof(header)); + if ((err != 0)) { + info_scsi_cmd_err(udev, "READ DISC INFORMATION", err); info(udev, "no current profile, assuming no media\n"); return -1; - } + }; cd_media = 1; + if (header[2] & 16) { + cd_media_cd_rw = 1; + info(udev, "profile 0x0a media_cd_rw\n"); + } + else if ((header[2] & 3) < 2 && cd_cd_r) { + cd_media_cd_r = 1; + info(udev, "profile 0x09 media_cd_r\n"); + } + else { + cd_media_cd_rom = 1; + info(udev, "profile 0x08 media_cd_rom\n"); + } + return 0; +} + +static int cd_profiles(struct udev *udev, int fd) +{ + struct scsi_cmd sc; + unsigned char features[65530]; + unsigned int cur_profile = 0; + unsigned int len; + unsigned int i; + int err; + + scsi_cmd_init(udev, &sc, features, sizeof(features)); + scsi_cmd_set(udev, &sc, 0, 0x46); + scsi_cmd_set(udev, &sc, 7, (sizeof(features) >> 8) & 0xff); + scsi_cmd_set(udev, &sc, 8, sizeof(features) & 0xff); + scsi_cmd_set(udev, &sc, 9, 0); + err = scsi_cmd_run(udev, &sc, fd, features, sizeof(features)); + if ((err != 0)) { + info_scsi_cmd_err(udev, "GET CONFIGURATION", err); + /* handle pre-MMC2 drives which do not support GET CONFIGURATION */ + if (SK(err) == 0x5 && ASC(err) == 0x20) { + info(udev, "drive is pre-MMC2 and does not support 46h get configuration command\n"); + info(udev, "trying to work around the problem\n"); + return cd_profiles_old_mmc(udev, fd); + } + return -1; + } + + len = features[0] << 24 | features[1] << 16 | features[2] << 8 | features[3]; + info(udev, "GET CONFIGURATION: size of features buffer 0x%04x\n", len); + + if (len > sizeof(features)) { + info(udev, "can not get features in a single query, truncating\n"); + len = sizeof(features); + } + + /* device features */ + for (i = 8; i+4 < len; i += (4 + features[i+3])) { + unsigned int feature; + + feature = features[i] << 8 | features[i+1]; + + switch (feature) { + case 0x00: + info(udev, "GET CONFIGURATION: feature 'profiles', with %i entries\n", features[i+3] / 4); + feature_profiles(udev, &features[i]+4, features[i+3]); + break; + default: + info(udev, "GET CONFIGURATION: feature 0x%04x , with 0x%02x bytes\n", feature, features[i+3]); + break; + } + } + + cur_profile = features[6] << 8 | features[7]; + if (cur_profile > 0) { + info(udev, "current profile 0x%02x\n", cur_profile); + } else { + info(udev, "no current profile, assuming no media\n"); + return -1; + } + switch (cur_profile) { case 0x03: case 0x04: case 0x05: + info(udev, "profile 0x%02x \n", cur_profile); + cd_media = 1; cd_media_mo = 1; break; case 0x08: + info(udev, "profile 0x%02x media_cd_rom\n", cur_profile); + cd_media = 1; cd_media_cd_rom = 1; break; case 0x09: + info(udev, "profile 0x%02x media_cd_r\n", cur_profile); + cd_media = 1; cd_media_cd_r = 1; break; case 0x0a: + info(udev, "profile 0x%02x media_cd_rw\n", cur_profile); + cd_media = 1; cd_media_cd_rw = 1; break; case 0x10: + info(udev, "profile 0x%02x media_dvd_ro\n", cur_profile); + cd_media = 1; cd_media_dvd_rom = 1; break; case 0x11: + info(udev, "profile 0x%02x media_dvd_r\n", cur_profile); + cd_media = 1; cd_media_dvd_r = 1; break; case 0x12: + info(udev, "profile 0x%02x media_dvd_ram\n", cur_profile); + cd_media = 1; cd_media_dvd_ram = 1; break; case 0x13: case 0x14: + info(udev, "profile 0x%02x media_dvd_rw\n", cur_profile); + cd_media = 1; cd_media_dvd_rw = 1; break; case 0x1B: + info(udev, "profile 0x%02x media_dvd_plus_r\n", cur_profile); + cd_media = 1; cd_media_dvd_plus_r = 1; break; case 0x1A: + info(udev, "profile 0x%02x media_dvd_plus_rw\n", cur_profile); + cd_media = 1; cd_media_dvd_plus_rw = 1; break; case 0x2A: + info(udev, "profile 0x%02x media_dvd_plus_rw_dl\n", cur_profile); + cd_media = 1; cd_media_dvd_plus_rw_dl = 1; break; case 0x2B: + info(udev, "profile 0x%02x media_dvd_plus_r_dl\n", cur_profile); + cd_media = 1; cd_media_dvd_plus_r_dl = 1; break; case 0x40: + info(udev, "profile 0x%02x media_bd\n", cur_profile); + cd_media = 1; cd_media_bd = 1; break; case 0x41: case 0x42: + info(udev, "profile 0x%02x media_bd_r\n", cur_profile); + cd_media = 1; cd_media_bd_r = 1; break; case 0x43: + info(udev, "profile 0x%02x media_bd_re\n", cur_profile); + cd_media = 1; cd_media_bd_re = 1; break; case 0x50: + info(udev, "profile 0x%02x media_hddvd\n", cur_profile); + cd_media = 1; cd_media_hddvd = 1; break; case 0x51: + info(udev, "profile 0x%02x media_hddvd_r\n", cur_profile); + cd_media = 1; cd_media_hddvd_r = 1; break; case 0x52: + info(udev, "profile 0x%02x media_hddvd_rw\n", cur_profile); + cd_media = 1; cd_media_hddvd_rw = 1; break; default: + info(udev, "profile 0x%02x \n", cur_profile); break; } return 0; @@ -415,22 +556,130 @@ static int cd_media_info(struct udev *udev, int fd) }; int err; + scsi_cmd_init(udev, &sc, header, sizeof(header)); scsi_cmd_set(udev, &sc, 0, 0x51); - scsi_cmd_set(udev, &sc, 8, sizeof(header)); + scsi_cmd_set(udev, &sc, 8, sizeof(header) & 0xff); scsi_cmd_set(udev, &sc, 9, 0); err = scsi_cmd_run(udev, &sc, fd, header, sizeof(header)); - if ((err < 0)) { + if ((err != 0)) { info_scsi_cmd_err(udev, "READ DISC INFORMATION", err); return -1; }; + cd_media = 1; info(udev, "disk type %02x\n", header[8]); /* exclude plain CDROM, some fake cdroms return 0 for "blank" media here */ - if (!cd_media_cd_rom && (header[2] & 3) < 4) + if (!cd_media_cd_rom) cd_media_state = media_status[header[2] & 3]; - if ((header[2] & 3) != 2) + /* DVD+RW discs (and DVD-RW in restricted mode) once formatted are + * always "complete", DVD-RAM are "other" or "complete" if the disc is + * write protected; we need to check the contents if it is blank */ + if ((cd_media_dvd_rw || cd_media_dvd_plus_rw || cd_media_dvd_plus_rw_dl || cd_media_dvd_ram) && (header[2] & 3) > 1) { + unsigned char buffer[17 * 2048]; + unsigned char result, len; + int block, offset; + + if (cd_media_dvd_ram) { + /* a write protected dvd-ram may report "complete" status */ + + unsigned char dvdstruct[8]; + unsigned char format[12]; + + scsi_cmd_init(udev, &sc, dvdstruct, sizeof(dvdstruct)); + scsi_cmd_set(udev, &sc, 0, 0xAD); + scsi_cmd_set(udev, &sc, 7, 0xC0); + scsi_cmd_set(udev, &sc, 9, sizeof(dvdstruct)); + scsi_cmd_set(udev, &sc, 11, 0); + err = scsi_cmd_run(udev, &sc, fd, dvdstruct, sizeof(dvdstruct)); + if ((err != 0)) { + info_scsi_cmd_err(udev, "READ DVD STRUCTURE", err); + return -1; + } + if (dvdstruct[4] & 0x02) { + cd_media_state = media_status[2]; + info(udev, "write-protected DVD-RAM media inserted\n"); + goto determined; + } + + /* let's make sure we don't try to read unformatted media */ + scsi_cmd_init(udev, &sc, format, sizeof(format)); + scsi_cmd_set(udev, &sc, 0, 0x23); + scsi_cmd_set(udev, &sc, 8, sizeof(format)); + scsi_cmd_set(udev, &sc, 9, 0); + err = scsi_cmd_run(udev, &sc, fd, format, sizeof(format)); + if ((err != 0)) { + info_scsi_cmd_err(udev, "READ DVD FORMAT CAPACITIES", err); + return -1; + } + + len = format[3]; + if (len & 7 || len < 16) { + info(udev, "invalid format capacities length\n"); + return -1; + } + + switch(format[8] & 3) { + case 1: + info(udev, "unformatted DVD-RAM media inserted\n"); + /* This means that last format was interrupted + * or failed, blank dvd-ram discs are factory + * formatted. Take no action here as it takes + * quite a while to reformat a dvd-ram and it's + * not automatically started */ + goto determined; + + case 2: + info(udev, "formatted DVD-RAM media inserted\n"); + break; + + case 3: + cd_media = 0; //return no media + info(udev, "format capacities returned no media\n"); + return -1; + } + } + + /* Take a closer look at formatted media (unformatted DVD+RW + * has "blank" status", DVD-RAM was examined earlier) and check + * for ISO and UDF PVDs or a fs superblock presence and do it + * in one ioctl (we need just sectors 0 and 16) */ + scsi_cmd_init(udev, &sc, buffer, sizeof(buffer)); + scsi_cmd_set(udev, &sc, 0, 0x28); + scsi_cmd_set(udev, &sc, 5, 0); + scsi_cmd_set(udev, &sc, 8, 17); + scsi_cmd_set(udev, &sc, 9, 0); + err = scsi_cmd_run(udev, &sc, fd, buffer, sizeof(buffer)); + if ((err != 0)) { + info_scsi_cmd_err(udev, "READ FIRST 32 BLOCKS", err); + return -1; + } + + /* if any non-zero data is found in sector 16 (iso and udf) or + * eventually 0 (fat32 boot sector, ext2 superblock, etc), disc + * is assumed non-blank */ + result = 0; + + for (block = 32768; block >= 0 && !result; block -= 32768) { + offset = block; + while (offset < (block + 2048) && !result) { + result = buffer [offset]; + offset++; + } + } + + if (!result) { + cd_media_state = media_status[0]; + info(udev, "no data in blocks 0 or 16, assuming blank\n"); + } else { + info(udev, "data in blocks 0 or 16, assuming complete\n"); + } + } + +determined: + /* "other" is e. g. DVD-RAM, can't append sessions there either */ + if ((header[2] & 3) < 2) cd_media_session_next = header[10] << 8 | header[5]; cd_media_session_count = header[9] << 8 | header[4]; cd_media_track_count = header[11] << 8 | header[6]; @@ -447,12 +696,13 @@ static int cd_media_toc(struct udev *udev, int fd) unsigned char *p; int err; + scsi_cmd_init(udev, &sc, header, sizeof(header)); scsi_cmd_set(udev, &sc, 0, 0x43); scsi_cmd_set(udev, &sc, 6, 1); - scsi_cmd_set(udev, &sc, 8, sizeof(header)); + scsi_cmd_set(udev, &sc, 8, sizeof(header) & 0xff); scsi_cmd_set(udev, &sc, 9, 0); err = scsi_cmd_run(udev, &sc, fd, header, sizeof(header)); - if ((err < 0)) { + if ((err != 0)) { info_scsi_cmd_err(udev, "READ TOC", err); return -1; } @@ -468,13 +718,14 @@ static int cd_media_toc(struct udev *udev, int fd) if (len < 8) return 0; + scsi_cmd_init(udev, &sc, toc, sizeof(toc)); scsi_cmd_set(udev, &sc, 0, 0x43); scsi_cmd_set(udev, &sc, 6, header[2]); /* First Track/Session Number */ - scsi_cmd_set(udev, &sc, 7, len >> 8); - scsi_cmd_set(udev, &sc, 8, len); + scsi_cmd_set(udev, &sc, 7, (len >> 8) & 0xff); + scsi_cmd_set(udev, &sc, 8, len & 0xff); scsi_cmd_set(udev, &sc, 9, 0); err = scsi_cmd_run(udev, &sc, fd, toc, len); - if ((err < 0)) { + if ((err != 0)) { info_scsi_cmd_err(udev, "READ TOC (tracks)", err); return -1; } @@ -495,12 +746,13 @@ static int cd_media_toc(struct udev *udev, int fd) cd_media_track_count_audio++; } + scsi_cmd_init(udev, &sc, header, sizeof(header)); scsi_cmd_set(udev, &sc, 0, 0x43); scsi_cmd_set(udev, &sc, 2, 1); /* Session Info */ - scsi_cmd_set(udev, &sc, 8, 12); + scsi_cmd_set(udev, &sc, 8, sizeof(header)); scsi_cmd_set(udev, &sc, 9, 0); err = scsi_cmd_run(udev, &sc, fd, header, sizeof(header)); - if ((err < 0)) { + if ((err != 0)) { info_scsi_cmd_err(udev, "READ TOC (multi session)", err); return -1; } @@ -522,13 +774,14 @@ int main(int argc, char *argv[]) const char *node = NULL; int export = 0; int fd = -1; + int cnt; int rc = 0; udev = udev_new(); if (udev == NULL) goto exit; - logging_init("cdrom_id"); + udev_log_init("cdrom_id"); udev_set_log_fn(udev, log_fn); while (1) { @@ -567,9 +820,20 @@ int main(int argc, char *argv[]) goto exit; } - fd = open(node, O_RDONLY | O_NONBLOCK); + srand((unsigned int)getpid()); + for (cnt = 20; cnt > 0; cnt--) { + struct timespec duration; + + fd = open(node, O_RDONLY|O_NONBLOCK|(is_mounted(node) ? 0 : O_EXCL)); + if (fd >= 0 || errno != EBUSY) + break; + duration.tv_sec = 0; + duration.tv_nsec = (100 * 1000 * 1000) + (rand() % 100 * 1000 * 1000); + nanosleep(&duration, NULL); + } if (fd < 0) { info(udev, "unable to open '%s'\n", node); + fprintf(stderr, "unable to open '%s'\n", node); rc = 1; goto exit; } @@ -581,9 +845,9 @@ int main(int argc, char *argv[]) goto exit; } - /* check for media */ - if (cd_media_compat(udev, fd) < 0) - goto print; + /* check for media - don't bail if there's no media as we still need to + * to read profiles */ + cd_media_compat(udev, fd); /* check if drive talks MMC */ if (cd_inquiry(udev, fd) < 0) @@ -593,14 +857,14 @@ int main(int argc, char *argv[]) if (cd_profiles(udev, fd) < 0) goto print; - /* get session/track info */ - if (cd_media_toc(udev, fd) < 0) - goto print; - /* get writable media state */ if (cd_media_info(udev, fd) < 0) goto print; + /* get session/track info */ + if (cd_media_toc(udev, fd) < 0) + goto print; + print: printf("ID_CDROM=1\n"); if (cd_cd_rom) @@ -693,19 +957,19 @@ print: printf("ID_CDROM_MEDIA_SESSION_NEXT=%d\n", cd_media_session_next); if (cd_media_session_count > 0) printf("ID_CDROM_MEDIA_SESSION_COUNT=%d\n", cd_media_session_count); + if (cd_media_session_count > 1 && cd_media_session_last_offset > 0) + printf("ID_CDROM_MEDIA_SESSION_LAST_OFFSET=%llu\n", cd_media_session_last_offset); if (cd_media_track_count > 0) printf("ID_CDROM_MEDIA_TRACK_COUNT=%d\n", cd_media_track_count); if (cd_media_track_count_audio > 0) printf("ID_CDROM_MEDIA_TRACK_COUNT_AUDIO=%d\n", cd_media_track_count_audio); if (cd_media_track_count_data > 0) printf("ID_CDROM_MEDIA_TRACK_COUNT_DATA=%d\n", cd_media_track_count_data); - if (cd_media_session_last_offset > 0) - printf("ID_CDROM_MEDIA_SESSION_LAST_OFFSET=%llu\n", cd_media_session_last_offset); exit: if (fd >= 0) close(fd); udev_unref(udev); - logging_close(); + udev_log_close(); return rc; }