#ifndef SG_LIB_H #define SG_LIB_H /* * Copyright (c) 2004-2018 Douglas Gilbert. * All rights reserved. * Use of this source code is governed by a BSD-style * license that can be found in the BSD_LICENSE file. */ /* * * On 5th October 2004 a FreeBSD license was added to this file. * The intention is to keep this file and the related sg_lib.c file * as open source and encourage their unencumbered use. * * Current version number is in the sg_lib.c file and can be accessed * with the sg_lib_version() function. */ /* * This header file contains defines and function declarations that may * be useful to applications that communicate with devices that use a * SCSI command set. These command sets have names like SPC-4, SBC-3, * SSC-3, SES-2 and draft standards defining them can be found at * http://www.t10.org . Virtually all devices in the Linux SCSI subsystem * utilize SCSI command sets. Many devices in other Linux device subsystems * utilize SCSI command sets either natively or via emulation (e.g. a * parallel ATA disk in a USB enclosure). */ #include #include #include #ifdef __cplusplus extern "C" { #endif /* SCSI Peripheral Device Types (PDT) [5 bit field] */ #define PDT_DISK 0x0 /* direct access block device (disk) */ #define PDT_TAPE 0x1 /* sequential access device (magnetic tape) */ #define PDT_PRINTER 0x2 /* printer device (see SSC-1) */ #define PDT_PROCESSOR 0x3 /* processor device (e.g. SAFTE device) */ #define PDT_WO 0x4 /* write once device (some optical disks) */ #define PDT_MMC 0x5 /* CD/DVD/BD (multi-media) */ #define PDT_SCANNER 0x6 /* obsolete */ #define PDT_OPTICAL 0x7 /* optical memory device (some optical disks) */ #define PDT_MCHANGER 0x8 /* media changer device (e.g. tape robot) */ #define PDT_COMMS 0x9 /* communications device (obsolete) */ #define PDT_SAC 0xc /* storage array controller device */ #define PDT_SES 0xd /* SCSI Enclosure Services (SES) device */ #define PDT_RBC 0xe /* Reduced Block Commands (simplified PDT_DISK) */ #define PDT_OCRW 0xf /* optical card read/write device */ #define PDT_BCC 0x10 /* bridge controller commands */ #define PDT_OSD 0x11 /* Object Storage Device (OSD) */ #define PDT_ADC 0x12 /* Automation/drive commands (ADC) */ #define PDT_SMD 0x13 /* Security Manager Device (SMD) */ #define PDT_ZBC 0x14 /* Zoned Block Commands (ZBC) */ #define PDT_WLUN 0x1e /* Well known logical unit (WLUN) */ #define PDT_UNKNOWN 0x1f /* Unknown or no device type */ #ifndef SAM_STAT_GOOD /* The SCSI status codes as found in SAM-4 at www.t10.org */ #define SAM_STAT_GOOD 0x0 #define SAM_STAT_CHECK_CONDITION 0x2 #define SAM_STAT_CONDITION_MET 0x4 #define SAM_STAT_BUSY 0x8 #define SAM_STAT_INTERMEDIATE 0x10 /* obsolete in SAM-4 */ #define SAM_STAT_INTERMEDIATE_CONDITION_MET 0x14 /* obsolete in SAM-4 */ #define SAM_STAT_RESERVATION_CONFLICT 0x18 #define SAM_STAT_COMMAND_TERMINATED 0x22 /* obsolete in SAM-3 */ #define SAM_STAT_TASK_SET_FULL 0x28 #define SAM_STAT_ACA_ACTIVE 0x30 #define SAM_STAT_TASK_ABORTED 0x40 #endif /* The SCSI sense key codes as found in SPC-4 at www.t10.org */ #define SPC_SK_NO_SENSE 0x0 #define SPC_SK_RECOVERED_ERROR 0x1 #define SPC_SK_NOT_READY 0x2 #define SPC_SK_MEDIUM_ERROR 0x3 #define SPC_SK_HARDWARE_ERROR 0x4 #define SPC_SK_ILLEGAL_REQUEST 0x5 #define SPC_SK_UNIT_ATTENTION 0x6 #define SPC_SK_DATA_PROTECT 0x7 #define SPC_SK_BLANK_CHECK 0x8 #define SPC_SK_VENDOR_SPECIFIC 0x9 #define SPC_SK_COPY_ABORTED 0xa #define SPC_SK_ABORTED_COMMAND 0xb #define SPC_SK_RESERVED 0xc #define SPC_SK_VOLUME_OVERFLOW 0xd #define SPC_SK_MISCOMPARE 0xe #define SPC_SK_COMPLETED 0xf /* Transport protocol identifiers or just Protocol identifiers */ #define TPROTO_FCP 0 #define TPROTO_SPI 1 #define TPROTO_SSA 2 #define TPROTO_1394 3 #define TPROTO_SRP 4 /* SCSI over RDMA */ #define TPROTO_ISCSI 5 #define TPROTO_SAS 6 #define TPROTO_ADT 7 #define TPROTO_ATA 8 #define TPROTO_UAS 9 /* USB attached SCSI */ #define TPROTO_SOP 0xa /* SCSI over PCIe */ #define TPROTO_PCIE 0xb /* includes NVMe */ #define TPROTO_NONE 0xf /* SCSI Feature Sets (sfs) */ #define SCSI_FS_SPC_DISCOVERY_2016 0x1 #define SCSI_FS_SBC_BASE_2010 0x102 #define SCSI_FS_SBC_BASE_2016 0x101 #define SCSI_FS_SBC_BASIC_PROV_2016 0x103 #define SCSI_FS_SBC_DRIVE_MAINT_2016 0x104 /* Often SCSI responses use the highest integer that can fit in a field * to indicate "unbounded" or limit does not apply. Sometimes represented * in output as "-1" for brevity */ #define SG_LIB_UNBOUNDED_16BIT 0xffff #define SG_LIB_UNBOUNDED_32BIT 0xffffffffU #define SG_LIB_UNBOUNDED_64BIT 0xffffffffffffffffULL #if (__STDC_VERSION__ >= 199901L) /* C99 or later */ typedef uintptr_t sg_uintptr_t; #else typedef unsigned long sg_uintptr_t; #endif /* The format of the version string is like this: "2.26 20170906" */ const char * sg_lib_version(); /* Returns length of SCSI command given the opcode (first byte). * Yields the wrong answer for variable length commands (opcode=0x7f) * and potentially some vendor specific commands. */ int sg_get_command_size(unsigned char cdb_byte0); /* Command name given pointer to the cdb. Certain command names * depend on peripheral type (give 0 or -1 if unknown). Places command * name into buff and will write no more than buff_len bytes. */ void sg_get_command_name(const unsigned char * cdbp, int peri_type, int buff_len, char * buff); /* Command name given only the first byte (byte 0) of a cdb and * peripheral type (give 0 or -1 if unknown). */ void sg_get_opcode_name(unsigned char cdb_byte0, int peri_type, int buff_len, char * buff); /* Command name given opcode (byte 0), service action and peripheral type. * If no service action give 0, if unknown peripheral type give 0 or -1 . */ void sg_get_opcode_sa_name(unsigned char cdb_byte0, int service_action, int peri_type, int buff_len, char * buff); /* Fetch scsi status string. */ void sg_get_scsi_status_str(int scsi_status, int buff_len, char * buff); /* This is a slightly stretched SCSI sense "descriptor" format header. * The addition is to allow the 0x70 and 0x71 response codes. The idea * is to place the salient data of both "fixed" and "descriptor" sense * format into one structure to ease application processing. * The original sense buffer should be kept around for those cases * in which more information is required (e.g. the LBA of a MEDIUM ERROR). */ struct sg_scsi_sense_hdr { unsigned char response_code; /* permit: 0x0, 0x70, 0x71, 0x72, 0x73 */ unsigned char sense_key; unsigned char asc; unsigned char ascq; unsigned char byte4; unsigned char byte5; unsigned char byte6; unsigned char additional_length; }; /* Maps the salient data from a sense buffer which is in either fixed or * descriptor format into a structure mimicking a descriptor format * header (i.e. the first 8 bytes of sense descriptor format). * If zero response code returns false. Otherwise returns true and if 'sshp' * is non-NULL then zero all fields and then set the appropriate fields in * that structure. sshp::additional_length is always 0 for response * codes 0x70 and 0x71 (fixed format). */ bool sg_scsi_normalize_sense(const unsigned char * sensep, int sense_len, struct sg_scsi_sense_hdr * sshp); /* Attempt to find the first SCSI sense data descriptor that matches the * given 'desc_type'. If found return pointer to start of sense data * descriptor; otherwise (including fixed format sense data) returns NULL. */ const unsigned char * sg_scsi_sense_desc_find(const unsigned char * sensep, int sense_len, int desc_type); /* Get sense key from sense buffer. If successful returns a sense key value * between 0 and 15. If sense buffer cannot be decode, returns -1 . */ int sg_get_sense_key(const unsigned char * sensep, int sense_len); /* Yield string associated with sense_key value. Returns 'buff'. */ char * sg_get_sense_key_str(int sense_key, int buff_len, char * buff); /* Yield string associated with ASC/ASCQ values. Returns 'buff'. */ char * sg_get_asc_ascq_str(int asc, int ascq, int buff_len, char * buff); /* Returns true if valid bit set, false if valid bit clear. Irrespective the * information field is written out via 'info_outp' (except when it is * NULL). Handles both fixed and descriptor sense formats. */ bool sg_get_sense_info_fld(const unsigned char * sensep, int sb_len, uint64_t * info_outp); /* Returns true if fixed format or command specific information descriptor * is found in the descriptor sense; else false. If available the command * specific information field (4 byte integer in fixed format, 8 byte * integer in descriptor format) is written out via 'cmd_spec_outp'. * Handles both fixed and descriptor sense formats. */ bool sg_get_sense_cmd_spec_fld(const unsigned char * sensep, int sb_len, uint64_t * cmd_spec_outp); /* Returns true if any of the 3 bits (i.e. FILEMARK, EOM or ILI) are set. * In descriptor format if the stream commands descriptor not found * then returns false. Writes true or false corresponding to these bits to * the last three arguments if they are non-NULL. */ bool sg_get_sense_filemark_eom_ili(const unsigned char * sensep, int sb_len, bool * filemark_p, bool * eom_p, bool * ili_p); /* Returns true if SKSV is set and sense key is NO_SENSE or NOT_READY. Also * returns true if progress indication sense data descriptor found. Places * progress field from sense data where progress_outp points. If progress * field is not available returns false. Handles both fixed and descriptor * sense formats. N.B. App should multiply by 100 and divide by 65536 * to get percentage completion from given value. */ bool sg_get_sense_progress_fld(const unsigned char * sensep, int sb_len, int * progress_outp); /* Closely related to sg_print_sense(). Puts decoded sense data in 'buff'. * Usually multiline with multiple '\n' including one trailing. If * 'raw_sinfo' set appends sense buffer in hex. 'leadin' is string prepended * to each line written to 'buff', NULL treated as "". Returns the number of * bytes written to 'buff' excluding the trailing '\0'. * N.B. prior to sg3_utils v 1.42 'leadin' was only prepended to the first * line output. Also this function returned type void. */ int sg_get_sense_str(const char * leadin, const unsigned char * sense_buffer, int sb_len, bool raw_sinfo, int buff_len, char * buff); /* Decode descriptor format sense descriptors (assumes sense buffer is * in descriptor format). 'leadin' is string prepended to each line written * to 'b', NULL treated as "". Returns the number of bytes written to 'b' * excluding the trailing '\0'. */ int sg_get_sense_descriptors_str(const char * leadin, const unsigned char * sense_buffer, int sb_len, int blen, char * b); /* Decodes a designation descriptor (e.g. as found in the Device * Identification VPD page (0x83)) into string 'b' whose maximum length is * blen. 'leadin' is string prepended to each line written to 'b', NULL * treated as "". Returns the number of bytes written to 'b' excluding the * trailing '\0'. */ int sg_get_designation_descriptor_str(const char * leadin, const unsigned char * ddp, int dd_len, bool print_assoc, bool do_long, int blen, char * b); /* Yield string associated with peripheral device type (pdt). Returns * 'buff'. If 'pdt' out of range yields "bad pdt" string. */ char * sg_get_pdt_str(int pdt, int buff_len, char * buff); /* Some lesser used PDTs share a lot in common with a more used PDT. * Examples are PDT_ADC decaying to PDT_TAPE and PDT_ZBC to PDT_DISK. * If such a lesser used 'pdt' is given to this function, then it will * return the more used PDT (i.e. "decays to"); otherwise 'pdt' is returned. * Valid for 'pdt' 0 to 31, for other values returns 0. */ int sg_lib_pdt_decay(int pdt); /* Yield string associated with transport protocol identifier (tpi). Returns * 'buff'. If 'tpi' out of range yields "bad tpi" string. */ char * sg_get_trans_proto_str(int tpi, int buff_len, char * buff); /* Decode TransportID pointed to by 'bp' of length 'bplen'. Place decoded * string output in 'buff' which is also the return value. Each new line * is prefixed by 'leadin'. If leadin NULL treat as "". */ char * sg_decode_transportid_str(const char * leadin, unsigned char * bp, int bplen, bool only_one, int buff_len, char * buff); /* Returns a designator's type string given 'val' (0 to 15 inclusive), * otherwise returns NULL. */ const char * sg_get_desig_type_str(int val); /* Returns a designator's code_set string given 'val' (0 to 15 inclusive), * otherwise returns NULL. */ const char * sg_get_desig_code_set_str(int val); /* Returns a designator's association string given 'val' (0 to 3 inclusive), * otherwise returns NULL. */ const char * sg_get_desig_assoc_str(int val); /* Yield SCSI Feature Set (sfs) string. When 'peri_type' is < -1 (or > 31) * returns pointer to string (same as 'buff') associated with 'sfs_code'. * When 'peri_type' is between -1 (for SPC) and 31 (inclusive) then a match * on both 'sfs_code' and 'peri_type' is required. If 'foundp' is not NULL * then where it points is set to true if a match is found else it is set to * false. If 'buff' is not NULL then in the case of a match a descriptive * string is written to 'buff' while if there is not a not then a string * ending in "Reserved" is written (and may be prefixed with SPC, SBC, SSC * or ZBC). Returns 'buff' (i.e. a pointer value) even if it is NULL. * Example: * char b[64]; * ... * printf("%s\n", sg_get_sfs_str(sfs_code, -2, sizeof(b), b, NULL, 0)); */ const char * sg_get_sfs_str(uint16_t sfs_code, int peri_type, int buff_len, char * buff, bool * foundp, int verbose); /* This is a heuristic that takes into account the command bytes and length * to decide whether the presented unstructured sequence of bytes could be * a SCSI command. If so it returns true otherwise false. Vendor specific * SCSI commands (i.e. opcodes from 0xc0 to 0xff), if presented, are assumed * to follow SCSI conventions (i.e. length of 6, 10, 12 or 16 bytes). The * only SCSI commands considered above 16 bytes of length are the Variable * Length Commands (opcode 0x7f) and the XCDB wrapped commands (opcode 0x7e). * Both have an inbuilt length field which can be cross checked with clen. * No NVMe commands (64 bytes long plus some extra added by some OSes) have * opcodes 0x7e or 0x7f yet. ATA is register based but SATA has FIS * structures that are sent across the wire. The 'FIS register' structure is * used to move a command from a SATA host to device, but the ATA 'command' * is not the first byte. So it is harder to say what will happen if a * FIS structure is presented as a SCSI command, hopfully there is a low * probability this function will yield true in that case. */ bool sg_is_scsi_cdb(const uint8_t * cdbp, int clen); /* Yield string associated with NVMe command status value in sct_sc. It * expects to decode DW3 bits 27:17 from the completion queue. Bits 27:25 * are the Status Code Type (SCT) and bits 24:17 are the Status Code (SC). * Bit 17 in DW3 should be bit 0 in sct_sc. If no status string is found * a string of the form "Reserved [0x]" is generated. * Returns 'buff'. Does nothing if buff_len<=0 or if buff is NULL.*/ char * sg_get_nvme_cmd_status_str(uint16_t sct_sc, int buff_len, char * buff); /* Attempts to map NVMe status value ((SCT << 8) | SC) n sct_sc to a SCSI * status, sense_key, asc and ascq tuple. If successful returns true and * writes to non-NULL pointer arguments; otherwise returns false. */ bool sg_nvme_status2scsi(uint16_t sct_sc, uint8_t * status_p, uint8_t * sk_p, uint8_t * asc_p, uint8_t * ascq_p); extern FILE * sg_warnings_strm; void sg_set_warnings_strm(FILE * warnings_strm); /* The following "print" functions send ACSII to 'sg_warnings_strm' file * descriptor (default value is stderr). 'leadin' is string prepended to * each line printed out, NULL treated as "". */ void sg_print_command(const unsigned char * command); void sg_print_scsi_status(int scsi_status); /* 'leadin' is string prepended to each line printed out, NULL treated as * "". N.B. prior to sg3_utils v 1.42 'leadin' was only prepended to the * first line printed. */ void sg_print_sense(const char * leadin, const unsigned char * sense_buffer, int sb_len, bool raw_info); /* Following examines exit_status and outputs a clear error message to * warnings_strm (usually stderr) if one is known and returns true. * Otherwise it doesn't print anything and returns false. Note that if * exit_status==0 then returns true but prints nothing and if * exit_status<0 ("some error occurred") false is returned. If leadin is * non-NULL is will be printed before error message. */ bool sg_if_can2stderr(const char * leadin, int exit_status); /* Utilities can use these exit status values for syntax errors and * file (device node) problems (e.g. not found or permissions). */ #define SG_LIB_SYNTAX_ERROR 1 /* command line syntax problem */ #define SG_LIB_FILE_ERROR 15 /* device or other file problem */ /* The sg_err_category_sense() function returns one of the following. * These may be used as exit status values (from a process). Notice that * some of the lower values correspond to SCSI sense key values. */ #define SG_LIB_CAT_CLEAN 0 /* No errors or other information */ /* Value 1 left unused for utilities to use SG_LIB_SYNTAX_ERROR */ #define SG_LIB_CAT_NOT_READY 2 /* sense key, unit stopped? */ /* [sk,asc,ascq: 0x2,*,*] */ #define SG_LIB_CAT_MEDIUM_HARD 3 /* medium or hardware error, blank check */ /* [sk,asc,ascq: 0x3/0x4/0x8,*,*] */ #define SG_LIB_CAT_ILLEGAL_REQ 5 /* Illegal request (other than invalid */ /* opcode): [sk,asc,ascq: 0x5,*,*] */ #define SG_LIB_CAT_UNIT_ATTENTION 6 /* sense key, device state changed */ /* [sk,asc,ascq: 0x6,*,*] */ /* was SG_LIB_CAT_MEDIA_CHANGED earlier [sk,asc,ascq: 0x6,0x28,*] */ #define SG_LIB_CAT_DATA_PROTECT 7 /* sense key, media write protected? */ /* [sk,asc,ascq: 0x7,*,*] */ #define SG_LIB_CAT_INVALID_OP 9 /* (Illegal request,) Invalid opcode: */ /* [sk,asc,ascq: 0x5,0x20,0x0] */ #define SG_LIB_CAT_COPY_ABORTED 10 /* sense key, some data transferred */ /* [sk,asc,ascq: 0xa,*,*] */ #define SG_LIB_CAT_ABORTED_COMMAND 11 /* interpreted from sense buffer */ /* [sk,asc,ascq: 0xb,! 0x10,*] */ #define SG_LIB_CAT_MISCOMPARE 14 /* sense key, probably verify */ /* [sk,asc,ascq: 0xe,*,*] */ #define SG_LIB_CAT_NO_SENSE 20 /* sense data with key of "no sense" */ /* [sk,asc,ascq: 0x0,*,*] */ #define SG_LIB_CAT_RECOVERED 21 /* Successful command after recovered err */ /* [sk,asc,ascq: 0x1,*,*] */ #define SG_LIB_CAT_RES_CONFLICT SAM_STAT_RESERVATION_CONFLICT /* 24: this is a SCSI status, not sense. */ /* It indicates reservation by another */ /* machine blocks this command */ #define SG_LIB_CAT_CONDITION_MET 25 /* SCSI status, not sense key. */ /* Only from PRE-FETCH (SBC-4) */ #define SG_LIB_CAT_BUSY 26 /* SCSI status, not sense. Invites retry */ #define SG_LIB_CAT_TS_FULL 27 /* SCSI status, not sense. Wait then retry */ #define SG_LIB_CAT_ACA_ACTIVE 28 /* SCSI status; ACA seldom used */ #define SG_LIB_CAT_TASK_ABORTED 29 /* SCSI status, this command aborted by? */ #define SG_LIB_CAT_PROTECTION 40 /* subset of aborted command (for PI, DIF) */ /* [sk,asc,ascq: 0xb,0x10,*] */ #define SG_LIB_NVME_STATUS 48 /* NVMe Status Field (SF) other than 0 */ #define SG_LIB_WILD_RESID 49 /* Residual value for data-in transfer of a */ /* SCSI command is nonsensical */ #define SG_LIB_OS_BASE_ERR 50 /* in Linux: values found in: */ /* include/uapi/asm-generic/errno-base.h */ /* Example: ENOMEM reported as 62 (=50+12) */ #define SG_LIB_CAT_MALFORMED 97 /* Response to SCSI command malformed */ #define SG_LIB_CAT_SENSE 98 /* Something else is in the sense buffer */ #define SG_LIB_CAT_OTHER 99 /* Some other error/warning has occurred */ /* (e.g. a transport or driver error) */ /* Returns a SG_LIB_CAT_* value. If cannot decode sense_buffer or a less * common sense key then return SG_LIB_CAT_SENSE .*/ int sg_err_category_sense(const unsigned char * sense_buffer, int sb_len); /* Here are some additional sense data categories that are not returned * by sg_err_category_sense() but are returned by some related functions. */ #define SG_LIB_CAT_ILLEGAL_REQ_WITH_INFO 17 /* Illegal request (other than */ /* invalid opcode) plus 'info' field: */ /* [sk,asc,ascq: 0x5,*,*] */ #define SG_LIB_CAT_MEDIUM_HARD_WITH_INFO 18 /* medium or hardware error */ /* sense key plus 'info' field: */ /* [sk,asc,ascq: 0x3/0x4,*,*] */ #define SG_LIB_CAT_PROTECTION_WITH_INFO 41 /* aborted command sense key, */ /* protection plus 'info' field: */ /* [sk,asc,ascq: 0xb,0x10,*] */ #define SG_LIB_CAT_TIMEOUT 33 /* Yield string associated with sense category. Returns 'buff' (or pointer * to "Bad sense category" if 'buff' is NULL). If sense_cat unknown then * yield "Sense category: " string. */ const char * sg_get_category_sense_str(int sense_cat, int buff_len, char * buff, int verbose); /* Iterates to next designation descriptor in the device identification * VPD page. The 'initial_desig_desc' should point to start of first * descriptor with 'page_len' being the number of valid bytes in that * and following descriptors. To start, 'off' should point to a negative * value, thereafter it should point to the value yielded by the previous * call. If 0 returned then 'initial_desig_desc + *off' should be a valid * descriptor; returns -1 if normal end condition and -2 for an abnormal * termination. Matches association, designator_type and/or code_set when * any of those values are greater than or equal to zero. */ int sg_vpd_dev_id_iter(const unsigned char * initial_desig_desc, int page_len, int * off, int m_assoc, int m_desig_type, int m_code_set); /* <<< General purpose (i.e. not SCSI specific) utility functions >>> */ /* Always returns valid string even if errnum is wild (or library problem). * If errnum is negative, flip its sign. */ char * safe_strerror(int errnum); /* Print (to stdout) 'str' of bytes in hex, 16 bytes per line optionally * followed at the right hand side of the line with an ASCII interpretation. * Each line is prefixed with an address, starting at 0 for str[0]..str[15]. * All output numbers are in hex. 'no_ascii' allows for 3 output types: * > 0 each line has address then up to 16 ASCII-hex bytes * = 0 in addition, the bytes are listed in ASCII to the right * < 0 only the ASCII-hex bytes are listed (i.e. without address) */ void dStrHex(const char * str, int len, int no_ascii); /* Print (to sg_warnings_strm (stderr)) 'str' of bytes in hex, 16 bytes per * line optionally followed at right by its ASCII interpretation. Same * logic as dStrHex() with different output stream (i.e. stderr). */ void dStrHexErr(const char * str, int len, int no_ascii); /* Read 'len' bytes from 'str' and output as ASCII-Hex bytes (space * separated) to 'b' not to exceed 'b_len' characters. Each line * starts with 'leadin' (NULL for no leadin) and there are 16 bytes * per line with an extra space between the 8th and 9th bytes. 'format' * is 0 for repeat in printable ASCII ('.' for non printable chars) to * right of each line; 1 don't (so just output ASCII hex). Returns * number of bytes written to 'b' excluding the trailing '\0'. */ int dStrHexStr(const char * str, int len, const char * leadin, int format, int cb_len, char * cbp); /* The following 3 functions are equivalent to dStrHex(), dStrHexErr() and * dStrHexStr() respectively. The difference is the type of the first of * argument: uint8_t instead of char. The name of the argument is changed * to b_str to stress it is a pointer to the start of a binary string. */ void hex2stdout(const uint8_t * b_str, int len, int no_ascii); void hex2stderr(const uint8_t * b_str, int len, int no_ascii); int hex2str(const uint8_t * b_str, int len, const char * leadin, int format, int cb_len, char * cbp); /* Returns true when executed on big endian machine; else returns false. * Useful for displaying ATA identify words (which need swapping on a * big endian machine). */ bool sg_is_big_endian(); /* Returns true if byte sequence starting at bp with a length of b_len is * all zeros (for sg_all_zeros()) or all 0xff_s (for sg_all_ffs()); * otherwise returns false. If bp is NULL ir b_len <= 0 returns false. */ bool sg_all_zeros(const uint8_t * bp, int b_len); bool sg_all_ffs(const uint8_t * bp, int b_len); /* Extract character sequence from ATA words as in the model string * in a IDENTIFY DEVICE response. Returns number of characters * written to 'ochars' before 0 character is found or 'num' words * are processed. */ int sg_ata_get_chars(const uint16_t * word_arr, int start_word, int num_words, bool is_big_endian, char * ochars); /* Print (to stdout) 16 bit 'words' in hex, 8 words per line optionally * followed at the right hand side of the line with an ASCII interpretation * (pairs of ASCII characters in big endian order (upper first)). * Each line is prefixed with an address, starting at 0. * All output numbers are in hex. 'no_ascii' allows for 3 output types: * > 0 each line has address then up to 8 ASCII-hex words * = 0 in addition, the words are listed in ASCII pairs to the right * = -1 only the ASCII-hex words are listed (i.e. without address) * = -2 only the ASCII-hex words, formatted for "hdparm --Istdin" * < -2 same as -1 * If 'swapb' is true then bytes in each word swapped. Needs to be set * for ATA IDENTIFY DEVICE response on big-endian machines. */ void dWordHex(const uint16_t * words, int num, int no_ascii, bool swapb); /* If the number in 'buf' can not be decoded or the multiplier is unknown * then -1 is returned. Accepts a hex prefix (0x or 0X) or a 'h' (or 'H') * suffix. Otherwise a decimal multiplier suffix may be given. Recognised * multipliers: c C *1; w W *2; b B *512; k K KiB *1,024; * KB *1,000; m M MiB *1,048,576; MB *1,000,000; g G GiB *1,073,741,824; * GB *1,000,000,000 and x which multiplies by . Ignore leading * spaces and tabs; accept comma, hyphen, space, tab and hash as terminator. */ int sg_get_num(const char * buf); /* If the number in 'buf' can not be decoded then -1 is returned. Accepts a * hex prefix (0x or 0X) or a 'h' (or 'H') suffix; otherwise decimal is * assumed. Does not accept multipliers. Accept a comma (","), hyphen ("-"), * a whitespace or newline as terminator. Only decimal numbers can represent * negative numbers and '-1' must be treated separately. */ int sg_get_num_nomult(const char * buf); /* If the number in 'buf' can not be decoded or the multiplier is unknown * then -1LL is returned. Accepts a hex prefix (0x or 0X) or a 'h' (or 'H') * suffix. Otherwise a decimal multiplier suffix may be given. In addition * to supporting the multipliers of sg_get_num(), this function supports: * t T TiB *(2**40); TB *(10**12); p P PiB *(2**50); PB *(10**15) . * Ignore leading spaces and tabs; accept comma, hyphen, space, tab and hash * as terminator. */ int64_t sg_get_llnum(const char * buf); /* If the number in 'buf' can not be decoded then -1 is returned. Accepts a * hex prefix (0x or 0X) or a 'h' (or 'H') suffix; otherwise decimal is * assumed. Does not accept multipliers. Accept a comma (","), hyphen ("-"), * a whitespace or newline as terminator. Only decimal numbers can represent * negative numbers and '-1' must be treated separately. */ int64_t sg_get_llnum_nomult(const char * buf); /* Returns pointer to heap (or NULL) that is aligned to a align_to byte * boundary. Sends back *buff_to_free pointer in third argument that may be * different from the return value. If it is different then the *buff_to_free * pointer should be freed (rather than the returned value) when the heap is * no longer needed. If align_to is 0 then aligns to OS's page size. Sets all * returned heap to zeros. If num_bytes is 0 then set to page size. */ uint8_t * sg_memalign(uint32_t num_bytes, uint32_t align_to, uint8_t ** buff_to_free, bool vb); /* Returns OS page size in bytes. If uncertain returns 4096. */ uint32_t sg_get_page_size(void); /* If os_err_num is within bounds then the returned value is 'os_err_num + * SG_LIB_OS_BASE_ERR' otherwise -1 is returned. If os_err_num is 0 then 0 * is returned. */ int sg_convert_errno(int os_err_num); /* <<< Architectural support functions [is there a better place?] >>> */ /* Non Unix OSes distinguish between text and binary files. * Set text mode on fd. Does nothing in Unix. Returns negative number on * failure. */ int sg_set_text_mode(int fd); /* Set binary mode on fd. Does nothing in Unix. Returns negative number on * failure. */ int sg_set_binary_mode(int fd); #ifdef __cplusplus } #endif #endif /* SG_LIB_H */