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