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/* 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 (2.4 kb)"
//config: default y
//config: #select PLATFORM_LINUX
//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, unsigned *bufsize_p)
{
unsigned bufsize = *bufsize_p;
ssize_t sz;
if ((int)(bufsize - 2) <= 0)
return buf;
sz = open_read_close(filename, buf, bufsize - 2);
if (sz < 0)
sz = 0;
buf[sz] = '\0';
sz = (trim(buf) - buf) + 1;
bufsize -= sz;
buf += sz;
buf[0] = '\0';
*bufsize_p = bufsize;
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;
unsigned bufsize;
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;
bufsize = sizeof(buf);
vendor = buf;
ptr = get_line("vendor", buf, &bufsize);
type_str = ptr;
ptr = get_line("type", ptr, &bufsize);
model = ptr;
ptr = get_line("model", ptr, &bufsize);
rev = ptr;
ptr = get_line("rev", ptr, &bufsize);
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;
}
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