9c7ee1439
Markus Gothe
2017-04-18
Subject
lsscsi: new applet
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miscutils/lsscsi.c+123 -0
| @@ -0,0 +1,123 @@ | |
| + | /* vi: set sw=4 ts=4: */ |
| + | /* |
| + | * lsscsi implementation for busybox |
| + | * |
| + | * Copyright (C) 2017 Markus Gothe <[email protected]> |
| + | * |
| + | * 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; |
| + | } |