diff options
Diffstat (limited to 'miscutils')
| -rw-r--r-- | miscutils/hdparm.c | 32 |
1 files changed, 16 insertions, 16 deletions
diff --git a/miscutils/hdparm.c b/miscutils/hdparm.c index 24962dd25..5ac7bdcb7 100644 --- a/miscutils/hdparm.c +++ b/miscutils/hdparm.c @@ -565,10 +565,8 @@ static void print_ascii(uint16_t *p, uint8_t length) { printf("\n"); } -/* identify() is the only extern function used across two source files. The - others, though, were declared in hdparm.c with global scope; since other - functions in that file have static (file) scope, I assume the difference is - intentional. */ +// Parse 512 byte disk identification block and print much crap. + static void identify(uint16_t *id_supplied) { uint16_t buf[256]; @@ -581,6 +579,8 @@ static void identify(uint16_t *id_supplied) uint64_t bbbig; /* (:) */ const char *strng; + // Adjust for endianness if necessary. + if (BB_BIG_ENDIAN) { swab(id_supplied, buf, sizeof(buf)); val = buf; @@ -1997,16 +1997,12 @@ static void process_dev(char *devname) if (get_IDentity) { unsigned char args1[4+512]; /* = { ... } will eat 0.5k of rodata! */ - unsigned i; memset(args1, 0, sizeof(args1)); args1[0] = WIN_IDENTIFY; args1[3] = 1; - if (!bb_ioctl_alt(fd, HDIO_DRIVE_CMD, args1, WIN_PIDENTIFY, "HDIO_DRIVE_CMD(identify)")) { - uint16_t *ptr = (uint16_t *)args1; - for (i=0; i<sizeof(args1)/2; i++) ptr[i] = SWAP_LE16(ptr[i]); - identify((void *)(ptr+2)); - } + if (!bb_ioctl_alt(fd, HDIO_DRIVE_CMD, args1, WIN_PIDENTIFY, "HDIO_DRIVE_CMD(identify)")) + identify((void *)(args1 + 4)); } #endif #ifdef CONFIG_FEATURE_HDPARM_HDIO_TRISTATE_HWIF @@ -2053,19 +2049,23 @@ static int fromhex(unsigned char c) static void identify_from_stdin(void) { - uint16_t sbuf[800]; - unsigned char buf[1600], *b = (unsigned char *)buf; + uint16_t sbuf[256]; + unsigned char buf[1280], *b = (unsigned char *)buf; int i, count = read(0, buf, 1280); if (count != 1280) bb_error_msg_and_die("read(%d bytes) failed (rc=%d)", 1280, count); - for (i = 0; count >= 4; ++i) + // Convert the newline-separated hex data into an identify block. + + for (i = 0; i<256; i++) { - sbuf[i] = SWAP_LE16((fromhex(b[0]) << 12) | (fromhex(b[1]) << 8) | (fromhex(b[2]) << 4) | fromhex(b[3])); - b += 5; - count -= 5; + int j; + for(j=0;j<4;j++) sbuf[i] = (sbuf[i] <<4) + fromhex(*(b++)); } + + // Parse the data. + identify(sbuf); } #endif |