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fsck_minix: optimizations. ~130 bytes
This commit is contained in:
Denis Vlasenko
parent
24cfe8fe0c
commit
6dd392a252
@ -122,7 +122,11 @@ struct minix2_inode {
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uint32_t i_zone[10];
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};
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/* Believe it or not, but mount.h has this one */
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#undef BLOCK_SIZE
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enum {
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BLOCK_SIZE = 1024,
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MINIX_ROOT_INO = 1,
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MINIX_LINK_MAX = 250,
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MINIX2_LINK_MAX = 65530,
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@ -190,7 +194,7 @@ enum { ROOT_INO = 1 };
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#define BITS_PER_BLOCK (BLOCK_SIZE<<3)
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static char *program_version = "1.2 - 11/11/96";
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#define PROGRAM_VERSION "1.2 - 11/11/96"
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static char *device_name;
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static int IN;
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static smallint repair, automatic, verbose, list, show, warn_mode, force;
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@ -335,7 +339,8 @@ static int ask(const char *string, int def)
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printf(def ? "%s (y/n)? " : "%s (n/y)? ", string);
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for (;;) {
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fflush(stdout);
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if ((c = getchar()) == EOF) {
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c = getchar();
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if (c == EOF) {
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if (!def)
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errors_uncorrected = 1;
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return def;
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@ -371,7 +376,8 @@ static void check_mount(void)
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int cont;
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int fd;
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if ((f = setmntent(MOUNTED, "r")) == NULL)
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f = setmntent(MOUNTED, "r");
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if (f == NULL)
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return;
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while ((mnt = getmntent(f)) != NULL)
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if (strcmp(device_name, mnt->mnt_fsname) == 0)
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@ -388,7 +394,6 @@ static void check_mount(void)
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fd = open(MOUNTED, O_RDWR);
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if (fd < 0 && errno == EROFS)
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return;
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else
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close(fd);
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printf("%s is mounted. ", device_name);
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@ -585,16 +590,14 @@ static void write_super_block(void)
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* are uncorrected errors. The filesystem valid flag is
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* unconditionally set if we get this far.
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*/
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Super.s_state |= MINIX_VALID_FS;
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if (errors_uncorrected)
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Super.s_state |= MINIX_ERROR_FS;
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else
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Super.s_state |= MINIX_VALID_FS | MINIX_ERROR_FS;
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if (!errors_uncorrected)
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Super.s_state &= ~MINIX_ERROR_FS;
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if (BLOCK_SIZE != lseek(IN, BLOCK_SIZE, SEEK_SET))
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die("seek failed in write_super_block");
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if (BLOCK_SIZE != write(IN, super_block_buffer, BLOCK_SIZE))
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die("unable to write super-block");
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die("cannot write super-block");
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}
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static void write_tables(void)
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@ -602,11 +605,11 @@ static void write_tables(void)
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write_super_block();
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if (IMAPS * BLOCK_SIZE != write(IN, inode_map, IMAPS * BLOCK_SIZE))
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die("unable to write inode map");
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die("cannot write inode map");
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if (ZMAPS * BLOCK_SIZE != write(IN, zone_map, ZMAPS * BLOCK_SIZE))
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die("unable to write zone map");
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die("cannot write zone map");
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if (INODE_BUFFER_SIZE != write(IN, inode_buffer, INODE_BUFFER_SIZE))
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die("unable to write inodes");
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die("cannot write inodes");
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}
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static void get_dirsize(void)
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@ -637,7 +640,7 @@ static void read_superblock(void)
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if (BLOCK_SIZE != lseek(IN, BLOCK_SIZE, SEEK_SET))
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die("seek failed");
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if (BLOCK_SIZE != read(IN, super_block_buffer, BLOCK_SIZE))
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die("unable to read super block");
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die("cannot read super block");
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/* already initialized to:
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namelen = 14;
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dirsize = 16;
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@ -673,11 +676,11 @@ static void read_tables(void)
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inode_count = xmalloc(INODES + 1);
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zone_count = xmalloc(ZONES);
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if (IMAPS * BLOCK_SIZE != read(IN, inode_map, IMAPS * BLOCK_SIZE))
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die("unable to read inode map");
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die("cannot read inode map");
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if (ZMAPS * BLOCK_SIZE != read(IN, zone_map, ZMAPS * BLOCK_SIZE))
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die("unable to read zone map");
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die("cannot read zone map");
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if (INODE_BUFFER_SIZE != read(IN, inode_buffer, INODE_BUFFER_SIZE))
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die("unable to read inodes");
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die("cannot read inodes");
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if (NORM_FIRSTZONE != FIRSTZONE) {
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printf("warning: firstzone!=norm_firstzone\n");
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errors_uncorrected = 1;
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@ -1024,18 +1027,16 @@ static void check_file(struct minix_inode *dir, unsigned int offset)
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inode = get_inode(ino);
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pop_filename();
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if (!offset) {
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if (!inode || strcmp(".", name)) {
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if (inode && LONE_CHAR(name, '.'))
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return;
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printf("%s: bad directory: '.' isn't first\n", current_name);
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errors_uncorrected = 1;
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} else
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return;
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}
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if (offset == dirsize) {
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if (!inode || strcmp("..", name)) {
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if (inode && strcmp("..", name) == 0)
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return;
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printf("%s: bad directory: '..' isn't second\n", current_name);
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errors_uncorrected = 1;
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} else
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return;
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}
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if (!inode)
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return;
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@ -1077,18 +1078,16 @@ static void check_file2(struct minix2_inode *dir, unsigned int offset)
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inode = get_inode2(ino);
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pop_filename();
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if (!offset) {
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if (!inode || strcmp(".", name)) {
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if (inode && LONE_CHAR(name, '.'))
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return;
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printf("%s: bad directory: '.' isn't first\n", current_name);
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errors_uncorrected = 1;
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} else
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return;
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}
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if (offset == dirsize) {
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if (!inode || strcmp("..", name)) {
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if (inode && strcmp("..", name) == 0)
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return;
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printf("%s: bad directory: '..' isn't second\n", current_name);
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errors_uncorrected = 1;
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} else
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return;
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}
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if (!inode)
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return;
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@ -1141,7 +1140,7 @@ static void recursive_check2(unsigned int ino)
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static int bad_zone(int i)
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{
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char buffer[1024];
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char buffer[BLOCK_SIZE];
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if (BLOCK_SIZE * i != lseek(IN, BLOCK_SIZE * i, SEEK_SET))
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die("seek failed in bad_zone");
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@ -1276,6 +1275,8 @@ int fsck_minix_main(int argc, char **argv)
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struct termios tmp;
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int retcode = 0;
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xfunc_exitcode = 8;
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alloc_current_name();
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#ifdef CONFIG_FEATURE_CLEAN_UP
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/* Don't bother to free memory. Exit does
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@ -1289,15 +1290,14 @@ int fsck_minix_main(int argc, char **argv)
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if (INODE_SIZE2 * MINIX2_INODES_PER_BLOCK != BLOCK_SIZE)
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die("bad v2 inode size");
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#endif
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while (argc-- > 1) {
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while (--argc != 0) {
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argv++;
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if (argv[0][0] != '-') {
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if (device_name)
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bb_show_usage();
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else
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device_name = argv[0];
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} else
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while (*++argv[0])
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} else {
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while (*++argv[0]) {
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switch (argv[0][0]) {
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case 'l':
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list = 1;
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@ -1326,8 +1326,11 @@ int fsck_minix_main(int argc, char **argv)
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bb_show_usage();
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}
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}
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}
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}
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if (!device_name)
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bb_show_usage();
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check_mount(); /* trying to check a mounted filesystem? */
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if (repair && !automatic) {
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if (!isatty(0) || !isatty(1))
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@ -1335,10 +1338,9 @@ int fsck_minix_main(int argc, char **argv)
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}
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IN = open(device_name, repair ? O_RDWR : O_RDONLY);
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if (IN < 0) {
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printf("unable to open device '%s'\n", device_name);
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leave(8);
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bb_error_msg_and_die("cannot open device '%s'", device_name);
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}
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sync(); /* paranoia? */
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/*sync(); paranoia? */
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read_superblock();
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/*
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@ -1347,13 +1349,14 @@ int fsck_minix_main(int argc, char **argv)
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* flags and whether or not the -f switch was specified on the
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* command line.
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*/
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printf("%s, %s\n", applet_name, program_version);
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printf("%s, "PROGRAM_VERSION"\n", applet_name);
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if (!(Super.s_state & MINIX_ERROR_FS)
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&& (Super.s_state & MINIX_VALID_FS) && !force
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) {
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if (repair)
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printf("%s is clean, check is skipped\n", device_name);
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return retcode;
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return 0;
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} else if (force)
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printf("Forcing filesystem check on %s\n", device_name);
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else if (repair)
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