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| -rw-r--r-- | miscutils/lsscsi.c | 123 |
1 files changed, 123 insertions, 0 deletions
diff --git a/miscutils/lsscsi.c b/miscutils/lsscsi.c new file mode 100644 index 0000000..1521680 --- /dev/null +++ b/miscutils/lsscsi.c @@ -0,0 +1,123 @@ +/* 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" +//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(lsscsi, BB_DIR_USR_BIN, BB_SUID_DROP)) + +//kbuild:lib-$(CONFIG_LSSCSI) += lsscsi.o + +//usage:#define lsscsi_trivial_usage NOUSAGE_STR +//usage:#define lsscsi_full_usage "" + +#include "libbb.h" + +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'; + trim(buf); + + sz = strlen(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("/sys/bus/scsi/devices"); + + 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" */ + + xchdir(".."); + } + + if (ENABLE_FEATURE_CLEAN_UP) + closedir(dir); + + return EXIT_SUCCESS; +} |