| /* vi: set sw=4 ts=4: */ |
| /* |
| * lsscsi implementation for busybox |
| * |
| * Copyright (C) 2017 Markus Gothe <nietzsche@lysator.liu.se> |
| * |
| * Licensed under GPLv2 or later, see file LICENSE in this source tree. |
| */ |
| //config:config LSSCSI |
| //config: bool "lsscsi (2.5 kb)" |
| //config: default y |
| //config: help |
| //config: lsscsi is a utility for displaying information about SCSI buses in the |
| //config: system and devices connected to them. |
| //config: |
| //config: This version uses sysfs (/sys/bus/scsi/devices) only. |
| |
| //applet:IF_LSSCSI(APPLET_NOEXEC(lsscsi, lsscsi, BB_DIR_USR_BIN, BB_SUID_DROP, lsscsi)) |
| |
| //kbuild:lib-$(CONFIG_LSSCSI) += lsscsi.o |
| |
| //usage:#define lsscsi_trivial_usage NOUSAGE_STR |
| //usage:#define lsscsi_full_usage "" |
| |
| #include "libbb.h" |
| |
| static const char scsi_dir[] ALIGN1 = "/sys/bus/scsi/devices"; |
| |
| static char *get_line(const char *filename, char *buf, char *bufend) |
| { |
| ssize_t sz = bufend - buf - 2; /* -2 for two NULs */ |
| |
| if (sz <= 0) |
| return buf; |
| |
| sz = open_read_close(filename, buf, sz); |
| if (sz < 0) |
| sz = 0; |
| buf[sz] = '\0'; |
| |
| buf = trim(buf) + 1; |
| buf[0] = '\0'; |
| |
| return buf; |
| } |
| |
| int lsscsi_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; |
| int lsscsi_main(int argc UNUSED_PARAM, char **argv UNUSED_PARAM) |
| { |
| struct dirent *de; |
| DIR *dir; |
| |
| xchdir(scsi_dir); |
| |
| dir = xopendir("."); |
| while ((de = readdir(dir)) != NULL) { |
| char buf[256]; |
| char *ptr; |
| const char *vendor; |
| const char *type_str; |
| const char *type_name; |
| const char *model; |
| const char *rev; |
| unsigned type; |
| |
| if (!isdigit(de->d_name[0])) |
| continue; |
| if (!strchr(de->d_name, ':')) |
| continue; |
| if (chdir(de->d_name) != 0) |
| continue; |
| |
| vendor = buf; |
| ptr = get_line("vendor", buf, buf + sizeof(buf)); |
| |
| type_str = ptr; |
| ptr = get_line("type", ptr, buf + sizeof(buf)); |
| |
| model = ptr; |
| ptr = get_line("model", ptr, buf + sizeof(buf)); |
| |
| rev = ptr; |
| /*ptr =*/ get_line("rev", ptr, buf + sizeof(buf)); |
| |
| printf("[%s]\t", de->d_name); |
| |
| #define scsi_device_types \ |
| "disk\0" "tape\0" "printer\0" "process\0" \ |
| "worm\0" "\0" "scanner\0" "optical\0" \ |
| "mediumx\0" "comms\0" "\0" "\0" \ |
| "storage\0" "enclosu\0" "sim dsk\0" "opti rd\0" \ |
| "bridge\0" "osd\0" "adi\0" "\0" \ |
| "\0" "\0" "\0" "\0" \ |
| "\0" "\0" "\0" "\0" \ |
| "\0" "\0" "wlun\0" "no dev" |
| type = bb_strtou(type_str, NULL, 10); |
| if (errno |
| || type >= 0x20 |
| || (type_name = nth_string(scsi_device_types, type))[0] == '\0' |
| ) { |
| printf("(%s)\t", type_str); |
| } else { |
| printf("%s\t", type_name); |
| } |
| |
| printf("%s\t""%s\t""%s\n", |
| vendor, |
| model, |
| rev |
| ); |
| /* TODO: also output device column, e.g. "/dev/sdX" */ |
| |
| /* chdir("..") may not work as expected, |
| * since we might have followed a symlink. |
| */ |
| xchdir(scsi_dir); |
| } |
| |
| if (ENABLE_FEATURE_CLEAN_UP) |
| closedir(dir); |
| |
| return EXIT_SUCCESS; |
| } |