diff options
| -rw-r--r-- | include/usage.h | 5 | ||||
| -rw-r--r-- | miscutils/mountpoint.c | 80 |
2 files changed, 46 insertions, 39 deletions
diff --git a/include/usage.h b/include/usage.h index 502fea7..000b864 100644 --- a/include/usage.h +++ b/include/usage.h @@ -2788,12 +2788,13 @@ "Returns 0 for success, number of failed mounts for -a, or errno for one mount." #define mountpoint_trivial_usage \ - "[-q] <[-d] DIR | -x DEVICE>" + "[-q] <[-dn] DIR | -x DEVICE>" #define mountpoint_full_usage "\n\n" \ - "mountpoint checks if the directory is a mountpoint\n" \ + "Check if the directory is a mountpoint\n" \ "\nOptions:" \ "\n -q Quiet" \ "\n -d Print major/minor device number of the filesystem" \ + "\n -n Print device name of the filesystem" \ "\n -x Print major/minor device number of the blockdevice" \ #define mountpoint_example_usage \ diff --git a/miscutils/mountpoint.c b/miscutils/mountpoint.c index 81ce429..b541ce2 100644 --- a/miscutils/mountpoint.c +++ b/miscutils/mountpoint.c @@ -12,55 +12,61 @@ #include "libbb.h" int mountpoint_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE; -int mountpoint_main(int argc, char **argv) +int mountpoint_main(int argc UNUSED_PARAM, char **argv) { struct stat st; + const char *msg; char *arg; - int opt = getopt32(argv, "qdx"); + int rc, opt; + + opt_complementary = "=1"; /* must have one argument */ + opt = getopt32(argv, "qdxn"); #define OPT_q (1) #define OPT_d (2) #define OPT_x (4) +#define OPT_n (8) + arg = argv[optind]; + msg = "%s"; - if (optind != argc - 1) - bb_show_usage(); + rc = (opt & OPT_x) ? stat(arg, &st) : lstat(arg, &st); + if (rc != 0) + goto err; - arg = argv[optind]; + if (opt & OPT_x) { + if (S_ISBLK(st.st_mode)) { + printf("%u:%u\n", major(st.st_rdev), + minor(st.st_rdev)); + return EXIT_SUCCESS; + } + errno = 0; /* make perror_msg work as error_msg */ + msg = "%s: not a block device"; + goto err; + } + + errno = ENOTDIR; + if (S_ISDIR(st.st_mode)) { + dev_t st_dev = st.st_dev; + ino_t st_ino = st.st_ino; + char *p = xasprintf("%s/..", arg); - if ( (opt & OPT_x && stat(arg, &st) == 0) || (lstat(arg, &st) == 0) ) { - if (opt & OPT_x) { - if (S_ISBLK(st.st_mode)) { - printf("%u:%u\n", major(st.st_rdev), - minor(st.st_rdev)); - return EXIT_SUCCESS; - } else { - if (opt & OPT_q) - bb_putchar('\n'); - else - bb_error_msg("%s: not a block device", arg); - } - return EXIT_FAILURE; - } else - if (S_ISDIR(st.st_mode)) { - dev_t st_dev = st.st_dev; - ino_t st_ino = st.st_ino; - char *p = xasprintf("%s/..", arg); + if (stat(p, &st) == 0) { + //int is_mnt = (st_dev != st.st_dev) || (st_dev == st.st_dev && st_ino == st.st_ino); + int is_not_mnt = (st_dev == st.st_dev) && (st_ino != st.st_ino); - if (stat(p, &st) == 0) { - int ret = (st_dev != st.st_dev) || - (st_dev == st.st_dev && st_ino == st.st_ino); - if (opt & OPT_d) - printf("%u:%u\n", major(st_dev), minor(st_dev)); - else if (!(opt & OPT_q)) - printf("%s is %sa mountpoint\n", arg, ret?"":"not "); - return !ret; - } - } else { - if (!(opt & OPT_q)) - bb_error_msg("%s: not a directory", arg); - return EXIT_FAILURE; + if (opt & OPT_d) + printf("%u:%u\n", major(st_dev), minor(st_dev)); + if (opt & OPT_n) + printf("%s %s\n", find_block_device(arg), arg); + if (!(opt & (OPT_q | OPT_d | OPT_n))) + printf("%s is %sa mountpoint\n", arg, is_not_mnt ? "not " : ""); + return is_not_mnt; } + arg = p; + /* else: stat had set errno, just fall through */ } + + err: if (!(opt & OPT_q)) - bb_simple_perror_msg(arg); + bb_perror_msg(msg, arg); return EXIT_FAILURE; } |