diff options
Diffstat (limited to 'c_src/tools-util.c')
| -rw-r--r-- | c_src/tools-util.c | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/c_src/tools-util.c b/c_src/tools-util.c index 3b9f149d..d8371c24 100644 --- a/c_src/tools-util.c +++ b/c_src/tools-util.c @@ -579,6 +579,49 @@ int dev_mounted(char *dev) return 2; } +static char *dev_to_sysfs_path(dev_t dev) +{ + return mprintf("/sys/dev/block/%u:%u", major(dev), minor(dev)); +} + +char *fd_to_dev_model(int fd) +{ + struct stat stat = xfstat(fd); + + if (S_ISBLK(stat.st_mode)) { + char *sysfs_path = dev_to_sysfs_path(stat.st_rdev); + + char *model_path = mprintf("%s/device/model", sysfs_path); + if (!access(model_path, R_OK)) + goto got_model; + free(model_path); + + /* partition? try parent */ + + char buf[1024]; + if (readlink(sysfs_path, buf, sizeof(buf)) < 0) + die("readlink error on %s: %m", sysfs_path); + + free(sysfs_path); + sysfs_path = strdup(buf); + + *strrchr(sysfs_path, '/') = 0; + model_path = mprintf("%s/device/model", sysfs_path); + if (!access(model_path, R_OK)) + goto got_model; + + return strdup("(unknown device)"); + char *model; +got_model: + model = read_file_str(AT_FDCWD, model_path); + free(model_path); + free(sysfs_path); + return model; + } else { + return strdup("(reg file)"); + } +} + static int kstrtoull_symbolic(const char *s, unsigned int base, unsigned long long *res) { if (!strcmp(s, "U64_MAX")) { |