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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-06 02:25:50 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-06 02:25:50 +0000 |
commit | 19f4f86bfed21c5326ed2acebe1163f3a83e832b (patch) | |
tree | d59b9989ce55ed23693e80974d94c856f1c2c8b1 /src/udev/scsi_id/scsi_id.c | |
parent | Initial commit. (diff) | |
download | systemd-19f4f86bfed21c5326ed2acebe1163f3a83e832b.tar.xz systemd-19f4f86bfed21c5326ed2acebe1163f3a83e832b.zip |
Adding upstream version 241.upstream/241upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/udev/scsi_id/scsi_id.c')
-rw-r--r-- | src/udev/scsi_id/scsi_id.c | 597 |
1 files changed, 597 insertions, 0 deletions
diff --git a/src/udev/scsi_id/scsi_id.c b/src/udev/scsi_id/scsi_id.c new file mode 100644 index 0000000..2698cdd --- /dev/null +++ b/src/udev/scsi_id/scsi_id.c @@ -0,0 +1,597 @@ +/* SPDX-License-Identifier: GPL-2.0+ */ +/* + * Copyright © IBM Corp. 2003 + * Copyright © SUSE Linux Products GmbH, 2006 + */ + +#include <ctype.h> +#include <errno.h> +#include <fcntl.h> +#include <getopt.h> +#include <signal.h> +#include <stdarg.h> +#include <stdbool.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <sys/stat.h> +#include <unistd.h> + +#include "alloc-util.h" +#include "build.h" +#include "fd-util.h" +#include "libudev-util.h" +#include "scsi_id.h" +#include "string-util.h" +#include "strxcpyx.h" +#include "udev-util.h" + +static const struct option options[] = { + { "device", required_argument, NULL, 'd' }, + { "config", required_argument, NULL, 'f' }, + { "page", required_argument, NULL, 'p' }, + { "blacklisted", no_argument, NULL, 'b' }, + { "whitelisted", no_argument, NULL, 'g' }, + { "replace-whitespace", no_argument, NULL, 'u' }, + { "sg-version", required_argument, NULL, 's' }, + { "verbose", no_argument, NULL, 'v' }, + { "version", no_argument, NULL, 'V' }, /* don't advertise -V */ + { "export", no_argument, NULL, 'x' }, + { "help", no_argument, NULL, 'h' }, + {} +}; + +static bool all_good = false; +static bool dev_specified = false; +static char config_file[MAX_PATH_LEN] = "/etc/scsi_id.config"; +static enum page_code default_page_code = PAGE_UNSPECIFIED; +static int sg_version = 4; +static bool reformat_serial = false; +static bool export = false; +static char vendor_str[64]; +static char model_str[64]; +static char vendor_enc_str[256]; +static char model_enc_str[256]; +static char revision_str[16]; +static char type_str[16]; + +static void set_type(const char *from, char *to, size_t len) { + int type_num; + char *eptr; + const char *type = "generic"; + + type_num = strtoul(from, &eptr, 0); + if (eptr != from) { + switch (type_num) { + case 0: + type = "disk"; + break; + case 1: + type = "tape"; + break; + case 4: + type = "optical"; + break; + case 5: + type = "cd"; + break; + case 7: + type = "optical"; + break; + case 0xe: + type = "disk"; + break; + case 0xf: + type = "optical"; + break; + default: + break; + } + } + strscpy(to, len, type); +} + +/* + * get_value: + * + * buf points to an '=' followed by a quoted string ("foo") or a string ending + * with a space or ','. + * + * Return a pointer to the NUL terminated string, returns NULL if no + * matches. + */ +static char *get_value(char **buffer) { + static const char *quote_string = "\"\n"; + static const char *comma_string = ",\n"; + char *val; + const char *end; + + if (**buffer == '"') { + /* + * skip leading quote, terminate when quote seen + */ + (*buffer)++; + end = quote_string; + } else { + end = comma_string; + } + val = strsep(buffer, end); + if (val && end == quote_string) + /* + * skip trailing quote + */ + (*buffer)++; + + while (isspace(**buffer)) + (*buffer)++; + + return val; +} + +static int argc_count(char *opts) { + int i = 0; + while (*opts != '\0') + if (*opts++ == ' ') + i++; + return i; +} + +/* + * get_file_options: + * + * If vendor == NULL, find a line in the config file with only "OPTIONS="; + * if vendor and model are set find the first OPTIONS line in the config + * file that matches. Set argc and argv to match the OPTIONS string. + * + * vendor and model can end in '\n'. + */ +static int get_file_options(const char *vendor, const char *model, + int *argc, char ***newargv) { + _cleanup_free_ char *buffer = NULL; + _cleanup_fclose_ FILE *f; + char *buf; + char *str1; + char *vendor_in, *model_in, *options_in; /* read in from file */ + int lineno; + int c; + int retval = 0; + + f = fopen(config_file, "re"); + if (f == NULL) { + if (errno == ENOENT) + return 1; + else { + log_error_errno(errno, "can't open %s: %m", config_file); + return -1; + } + } + + /* + * Allocate a buffer rather than put it on the stack so we can + * keep it around to parse any options (any allocated newargv + * points into this buffer for its strings). + */ + buffer = malloc(MAX_BUFFER_LEN); + if (!buffer) + return log_oom(); + + *newargv = NULL; + lineno = 0; + for (;;) { + vendor_in = model_in = options_in = NULL; + + buf = fgets(buffer, MAX_BUFFER_LEN, f); + if (buf == NULL) + break; + lineno++; + if (buf[strlen(buffer) - 1] != '\n') { + log_error("Config file line %d too long", lineno); + break; + } + + while (isspace(*buf)) + buf++; + + /* blank or all whitespace line */ + if (*buf == '\0') + continue; + + /* comment line */ + if (*buf == '#') + continue; + + str1 = strsep(&buf, "="); + if (str1 && strcaseeq(str1, "VENDOR")) { + str1 = get_value(&buf); + if (!str1) { + retval = log_oom(); + break; + } + vendor_in = str1; + + str1 = strsep(&buf, "="); + if (str1 && strcaseeq(str1, "MODEL")) { + str1 = get_value(&buf); + if (!str1) { + retval = log_oom(); + break; + } + model_in = str1; + str1 = strsep(&buf, "="); + } + } + + if (str1 && strcaseeq(str1, "OPTIONS")) { + str1 = get_value(&buf); + if (!str1) { + retval = log_oom(); + break; + } + options_in = str1; + } + + /* + * Only allow: [vendor=foo[,model=bar]]options=stuff + */ + if (!options_in || (!vendor_in && model_in)) { + log_error("Error parsing config file line %d '%s'", lineno, buffer); + retval = -1; + break; + } + if (vendor == NULL) { + if (vendor_in == NULL) + break; + } else if (vendor_in && + startswith(vendor, vendor_in) && + (!model_in || startswith(model, model_in))) { + /* + * Matched vendor and optionally model. + * + * Note: a short vendor_in or model_in can + * give a partial match (that is FOO + * matches FOOBAR). + */ + break; + } + } + + if (retval == 0) { + if (vendor_in != NULL || model_in != NULL || + options_in != NULL) { + /* + * Something matched. Allocate newargv, and store + * values found in options_in. + */ + strcpy(buffer, options_in); + c = argc_count(buffer) + 2; + *newargv = calloc(c, sizeof(**newargv)); + if (!*newargv) + retval = log_oom(); + else { + *argc = c; + c = 0; + /* + * argv[0] at 0 is skipped by getopt, but + * store the buffer address there for + * later freeing + */ + (*newargv)[c] = buffer; + for (c = 1; c < *argc; c++) + (*newargv)[c] = strsep(&buffer, " \t"); + buffer = NULL; + } + } else { + /* No matches */ + retval = 1; + } + } + return retval; +} + +static void help(void) { + printf("Usage: %s [OPTION...] DEVICE\n\n" + "SCSI device identification.\n\n" + " -h --help Print this message\n" + " --version Print version of the program\n\n" + " -d --device= Device node for SG_IO commands\n" + " -f --config= Location of config file\n" + " -p --page=0x80|0x83|pre-spc3-83 SCSI page (0x80, 0x83, pre-spc3-83)\n" + " -s --sg-version=3|4 Use SGv3 or SGv4\n" + " -b --blacklisted Treat device as blacklisted\n" + " -g --whitelisted Treat device as whitelisted\n" + " -u --replace-whitespace Replace all whitespace by underscores\n" + " -v --verbose Verbose logging\n" + " -x --export Print values as environment keys\n" + , program_invocation_short_name); + +} + +static int set_options(int argc, char **argv, + char *maj_min_dev) { + int option; + + /* + * optind is a global extern used by getopt. Since we can call + * set_options twice (once for command line, and once for config + * file) we have to reset this back to 1. + */ + optind = 1; + while ((option = getopt_long(argc, argv, "d:f:gp:uvVxhbs:", options, NULL)) >= 0) + switch (option) { + case 'b': + all_good = false; + break; + + case 'd': + dev_specified = true; + strscpy(maj_min_dev, MAX_PATH_LEN, optarg); + break; + + case 'f': + strscpy(config_file, MAX_PATH_LEN, optarg); + break; + + case 'g': + all_good = true; + break; + + case 'h': + help(); + exit(EXIT_SUCCESS); + + case 'p': + if (streq(optarg, "0x80")) + default_page_code = PAGE_80; + else if (streq(optarg, "0x83")) + default_page_code = PAGE_83; + else if (streq(optarg, "pre-spc3-83")) + default_page_code = PAGE_83_PRE_SPC3; + else { + log_error("Unknown page code '%s'", optarg); + return -1; + } + break; + + case 's': + sg_version = atoi(optarg); + if (sg_version < 3 || sg_version > 4) { + log_error("Unknown SG version '%s'", optarg); + return -1; + } + break; + + case 'u': + reformat_serial = true; + break; + + case 'v': + log_set_target(LOG_TARGET_CONSOLE); + log_set_max_level(LOG_DEBUG); + log_open(); + break; + + case 'V': + printf("%s\n", GIT_VERSION); + exit(EXIT_SUCCESS); + + case 'x': + export = true; + break; + + case '?': + return -1; + + default: + assert_not_reached("Unknown option"); + } + + if (optind < argc && !dev_specified) { + dev_specified = true; + strscpy(maj_min_dev, MAX_PATH_LEN, argv[optind]); + } + + return 0; +} + +static int per_dev_options(struct scsi_id_device *dev_scsi, int *good_bad, int *page_code) { + int retval; + int newargc; + char **newargv = NULL; + int option; + + *good_bad = all_good; + *page_code = default_page_code; + + retval = get_file_options(vendor_str, model_str, &newargc, &newargv); + + optind = 1; /* reset this global extern */ + while (retval == 0) { + option = getopt_long(newargc, newargv, "bgp:", options, NULL); + if (option == -1) + break; + + switch (option) { + case 'b': + *good_bad = 0; + break; + + case 'g': + *good_bad = 1; + break; + + case 'p': + if (streq(optarg, "0x80")) { + *page_code = PAGE_80; + } else if (streq(optarg, "0x83")) { + *page_code = PAGE_83; + } else if (streq(optarg, "pre-spc3-83")) { + *page_code = PAGE_83_PRE_SPC3; + } else { + log_error("Unknown page code '%s'", optarg); + retval = -1; + } + break; + + default: + log_error("Unknown or bad option '%c' (0x%x)", option, option); + retval = -1; + break; + } + } + + if (newargv) { + free(newargv[0]); + free(newargv); + } + return retval; +} + +static int set_inq_values(struct scsi_id_device *dev_scsi, const char *path) { + int retval; + + dev_scsi->use_sg = sg_version; + + retval = scsi_std_inquiry(dev_scsi, path); + if (retval) + return retval; + + udev_util_encode_string(dev_scsi->vendor, vendor_enc_str, sizeof(vendor_enc_str)); + udev_util_encode_string(dev_scsi->model, model_enc_str, sizeof(model_enc_str)); + + util_replace_whitespace(dev_scsi->vendor, vendor_str, sizeof(vendor_str)-1); + util_replace_chars(vendor_str, NULL); + util_replace_whitespace(dev_scsi->model, model_str, sizeof(model_str)-1); + util_replace_chars(model_str, NULL); + set_type(dev_scsi->type, type_str, sizeof(type_str)); + util_replace_whitespace(dev_scsi->revision, revision_str, sizeof(revision_str)-1); + util_replace_chars(revision_str, NULL); + return 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. + */ +static int scsi_id(char *maj_min_dev) { + struct scsi_id_device dev_scsi = {}; + int good_dev; + int page_code; + int retval = 0; + + if (set_inq_values(&dev_scsi, maj_min_dev) < 0) { + retval = 1; + goto out; + } + + /* get per device (vendor + model) options from the config file */ + per_dev_options(&dev_scsi, &good_dev, &page_code); + if (!good_dev) { + retval = 1; + goto out; + } + + /* read serial number from mode pages (no values for optical drives) */ + scsi_get_serial(&dev_scsi, maj_min_dev, page_code, MAX_SERIAL_LEN); + + if (export) { + char serial_str[MAX_SERIAL_LEN]; + + printf("ID_SCSI=1\n"); + printf("ID_VENDOR=%s\n", vendor_str); + printf("ID_VENDOR_ENC=%s\n", vendor_enc_str); + printf("ID_MODEL=%s\n", model_str); + printf("ID_MODEL_ENC=%s\n", model_enc_str); + printf("ID_REVISION=%s\n", revision_str); + printf("ID_TYPE=%s\n", type_str); + if (dev_scsi.serial[0] != '\0') { + util_replace_whitespace(dev_scsi.serial, serial_str, sizeof(serial_str)-1); + util_replace_chars(serial_str, NULL); + printf("ID_SERIAL=%s\n", serial_str); + util_replace_whitespace(dev_scsi.serial_short, serial_str, sizeof(serial_str)-1); + util_replace_chars(serial_str, NULL); + printf("ID_SERIAL_SHORT=%s\n", serial_str); + } + if (dev_scsi.wwn[0] != '\0') { + printf("ID_WWN=0x%s\n", dev_scsi.wwn); + if (dev_scsi.wwn_vendor_extension[0] != '\0') { + printf("ID_WWN_VENDOR_EXTENSION=0x%s\n", dev_scsi.wwn_vendor_extension); + printf("ID_WWN_WITH_EXTENSION=0x%s%s\n", dev_scsi.wwn, dev_scsi.wwn_vendor_extension); + } else + printf("ID_WWN_WITH_EXTENSION=0x%s\n", dev_scsi.wwn); + } + if (dev_scsi.tgpt_group[0] != '\0') + printf("ID_TARGET_PORT=%s\n", dev_scsi.tgpt_group); + if (dev_scsi.unit_serial_number[0] != '\0') + printf("ID_SCSI_SERIAL=%s\n", dev_scsi.unit_serial_number); + goto out; + } + + if (dev_scsi.serial[0] == '\0') { + retval = 1; + goto out; + } + + if (reformat_serial) { + char serial_str[MAX_SERIAL_LEN]; + + util_replace_whitespace(dev_scsi.serial, serial_str, sizeof(serial_str)-1); + util_replace_chars(serial_str, NULL); + printf("%s\n", serial_str); + goto out; + } + + printf("%s\n", dev_scsi.serial); +out: + return retval; +} + +int main(int argc, char **argv) { + int retval = 0; + char maj_min_dev[MAX_PATH_LEN]; + int newargc; + char **newargv = NULL; + + log_set_target(LOG_TARGET_AUTO); + udev_parse_config(); + log_parse_environment(); + log_open(); + + /* + * Get config file options. + */ + retval = get_file_options(NULL, NULL, &newargc, &newargv); + if (retval < 0) { + retval = 1; + goto exit; + } + if (retval == 0) { + assert(newargv); + + if (set_options(newargc, newargv, maj_min_dev) < 0) { + retval = 2; + goto exit; + } + } + + /* + * Get command line options (overriding any config file settings). + */ + if (set_options(argc, argv, maj_min_dev) < 0) + exit(EXIT_FAILURE); + + if (!dev_specified) { + log_error("No device specified."); + retval = 1; + goto exit; + } + + retval = scsi_id(maj_min_dev); + +exit: + if (newargv) { + free(newargv[0]); + free(newargv); + } + log_close(); + return retval; +} |