summaryrefslogtreecommitdiff
path: root/util/nvmutil
diff options
context:
space:
mode:
authorLeah Rowe <leah@libreboot.org>2026-03-16 18:14:53 +0000
committerLeah Rowe <leah@libreboot.org>2026-03-16 18:14:53 +0000
commit8bd04bc5ada5f8e952632503027034e27b9811de (patch)
tree57076390d0245d271fc5ed3504eb3a440a5f31f1 /util/nvmutil
parent3c4ad4231ff22240abd7f0f8b4ed44805d98d313 (diff)
util/nvmutil: remove integer typedefs
better to just use standard names Signed-off-by: Leah Rowe <leah@libreboot.org>
Diffstat (limited to 'util/nvmutil')
-rw-r--r--util/nvmutil/nvmutil.c240
1 files changed, 116 insertions, 124 deletions
diff --git a/util/nvmutil/nvmutil.c b/util/nvmutil/nvmutil.c
index fc652347..b76f44eb 100644
--- a/util/nvmutil/nvmutil.c
+++ b/util/nvmutil/nvmutil.c
@@ -234,30 +234,22 @@ also consider:
#include <time.h>
#include <unistd.h>
-typedef unsigned char u8;
-typedef unsigned short ushort;
-typedef unsigned int uint;
-typedef unsigned long ulong;
-
/* type asserts */
typedef char static_assert_char_is_8_bits[(CHAR_BIT == 8) ? 1 : -1];
typedef char static_assert_char_is_1[(sizeof(char) == 1) ? 1 : -1];
-typedef char static_assert_u8_is_1[
- (sizeof(u8) == 1) ? 1 : -1];
-typedef char static_assert_ushort_is_2[
- (sizeof(ushort) >= 2) ? 1 : -1];
+typedef char static_assert_unsigned_char_is_1[
+ (sizeof(unsigned char) == 1) ? 1 : -1];
+typedef char static_assert_unsigned_short_is_2[
+ (sizeof(unsigned short) >= 2) ? 1 : -1];
typedef char static_assert_short_is_2[(sizeof(short) >= 2) ? 1 : -1];
-typedef char static_assert_uint_is_4[
- (sizeof(uint) >= 4) ? 1 : -1];
-typedef char static_assert_ulong_is_4[
- (sizeof(ulong) >= 4) ? 1 : -1];
+typedef char static_assert_unsigned_int_is_4[
+ (sizeof(unsigned int) >= 4) ? 1 : -1];
+typedef char static_assert_unsigned_long_is_4[
+ (sizeof(unsigned long) >= 4) ? 1 : -1];
typedef char static_assert_int_ge_32[(sizeof(int) >= 4) ? 1 : -1];
typedef char static_assert_twos_complement[
((-1 & 3) == 3) ? 1 : -1
];
-typedef char assert_ulong_ptr[
- (sizeof(ulong) >= sizeof(void *)) ? 1 : -1
-];
typedef char assert_unsigned_long_ptr[
(sizeof(unsigned long) >= sizeof(void *)) ? 1 : -1
];
@@ -365,7 +357,7 @@ int good_checksum(unsigned long partnum);
*/
void run_cmd(unsigned long c);
void check_command_num(unsigned long c);
-u8 valid_command(unsigned long c);
+unsigned char valid_command(unsigned long c);
/*
* portable timeval
@@ -384,10 +376,10 @@ unsigned long xstrxlen(const char *scmp, unsigned long maxlen);
void set_mac_byte(unsigned long mac_byte_pos);
void set_mac_nib(unsigned long mac_str_pos,
unsigned long mac_byte_pos, unsigned long mac_nib_pos);
-ushort hextonum(char ch_s);
-ushort rhex(void);
-ushort read_urandom(void);
-ulong entropy_jitter(void);
+unsigned short hextonum(char ch_s);
+unsigned short rhex(void);
+unsigned short read_urandom(void);
+unsigned long entropy_jitter(void);
int x_i_gettimeofday(struct x_st_timeval *tv, void *tz);
void write_mac_part(unsigned long partnum);
@@ -413,7 +405,7 @@ void cmd_helper_copy(void);
* cat, cat16 and cat128
*/
void cmd_helper_cat(void);
-void cat_buf(u8 *b);
+void cat_buf(unsigned char *b);
/*
* After command processing, write
@@ -424,14 +416,14 @@ void cat_buf(u8 *b);
*/
void write_gbe_file(void);
void set_checksum(unsigned long part);
-ushort calculated_checksum(unsigned long p);
+unsigned short calculated_checksum(unsigned long p);
/*
* Helper functions for accessing
* the NVM area during operation.
*/
-ushort nvm_word(unsigned long pos16, unsigned long part);
-void set_nvm_word(unsigned long pos16, unsigned long part, ushort val16);
+unsigned short nvm_word(unsigned long pos16, unsigned long part);
+void set_nvm_word(unsigned long pos16, unsigned long part, unsigned short val16);
void set_part_modified(unsigned long p);
void check_nvm_bound(unsigned long pos16, unsigned long part);
void check_bin(unsigned long a, const char *a_name);
@@ -447,13 +439,13 @@ int gbe_mv(void);
void check_written_part(unsigned long p);
void report_io_err_rw(void);
int fsync_dir(const char *path);
-u8 *gbe_mem_offset(unsigned long part, const char *f_op);
+unsigned char *gbe_mem_offset(unsigned long part, const char *f_op);
off_t gbe_file_offset(unsigned long part, const char *f_op);
off_t gbe_x_offset(unsigned long part, const char *f_op,
const char *d_type, off_t nsize, off_t ncmp);
-long rw_gbe_file_exact(int fd, u8 *mem, unsigned long nrw,
+long rw_gbe_file_exact(int fd, unsigned char *mem, unsigned long nrw,
off_t off, int rw_type);
-long rw_file_exact(int fd, u8 *mem, unsigned long len,
+long rw_file_exact(int fd, unsigned char *mem, unsigned long len,
off_t off, int rw_type, int loop_eagain, int loop_eintr,
unsigned long max_retries, int off_reset);
long prw(int fd, void *mem, unsigned long nrw,
@@ -542,19 +534,19 @@ unsigned long x_conv_fd(char *buf,
*
* The code will handle this properly.
*/
-u8 real_buf[GBE_BUF_SIZE];
-u8 bufcmp[GBE_BUF_SIZE]; /* compare gbe/tmp/reads */
-u8 pad[GBE_WORK_SIZE]; /* the file that wouldn't die */
-u8 *buf = real_buf;
+unsigned char real_buf[GBE_BUF_SIZE];
+unsigned char bufcmp[GBE_BUF_SIZE]; /* compare gbe/tmp/reads */
+unsigned char pad[GBE_WORK_SIZE]; /* the file that wouldn't die */
+unsigned char *buf = real_buf;
-ushort mac_buf[3];
+unsigned short mac_buf[3];
off_t gbe_file_size;
off_t gbe_tmp_size;
int gbe_fd = -1;
unsigned long part;
-u8 part_modified[2];
-u8 part_valid[2];
+unsigned char part_modified[2];
+unsigned char part_valid[2];
const char rmac[] = "xx:xx:xx:xx:xx:xx";
const char *mac_str = rmac;
@@ -615,9 +607,9 @@ struct commands {
const char *str;
void (*run)(void);
int argc;
- u8 arg_part;
- u8 chksum_read;
- u8 chksum_write;
+ unsigned char arg_part;
+ unsigned char chksum_read;
+ unsigned char chksum_write;
unsigned long rw_size; /* within the 4KB GbE part */
int flags; /* e.g. O_RDWR or O_RDONLY */
};
@@ -788,7 +780,7 @@ main(int argc, char *argv[])
err(errno, "pledge (kill unveil)");
#endif
- srand((uint)(time(NULL) ^ getpid()));
+ srand((unsigned int)(time(NULL) ^ getpid()));
open_gbe_file();
@@ -840,24 +832,24 @@ sanitize_command_index(unsigned long c)
if (command[c].argc < 3)
err(EINVAL, "cmd index %lu: argc below 3, %d",
- (ulong)c, command[c].argc);
+ (unsigned long)c, command[c].argc);
if (command[c].str == NULL)
err(EINVAL, "cmd index %lu: NULL str",
- (ulong)c);
+ (unsigned long)c);
if (*command[c].str == '\0')
err(EINVAL, "cmd index %lu: empty str",
- (ulong)c);
+ (unsigned long)c);
if (xstrxlen(command[c].str, MAX_CMD_LEN + 1) >
MAX_CMD_LEN) {
err(EINVAL, "cmd index %lu: str too long: %s",
- (ulong)c, command[c].str);
+ (unsigned long)c, command[c].str);
}
if (command[c].run == NULL)
err(EINVAL, "cmd index %lu: cmd ptr null",
- (ulong)c);
+ (unsigned long)c);
check_bin(command[c].arg_part, "cmd.arg_part");
check_bin(command[c].chksum_read, "cmd.chksum_read");
@@ -871,12 +863,12 @@ sanitize_command_index(unsigned long c)
break;
default:
err(EINVAL, "Unsupported rw_size: %lu",
- (ulong)gbe_rw_size);
+ (unsigned long)gbe_rw_size);
}
if (gbe_rw_size > GBE_PART_SIZE)
err(EINVAL, "rw_size larger than GbE part: %lu",
- (ulong)gbe_rw_size);
+ (unsigned long)gbe_rw_size);
if (command[c].flags != O_RDONLY &&
command[c].flags != O_RDWR)
@@ -905,7 +897,7 @@ set_cmd(int argc, char *argv[])
void
set_cmd_args(int argc, char *argv[])
{
- u8 arg_part;
+ unsigned char arg_part;
if (!valid_command(cmd_index) || argc < 3)
usage();
@@ -929,13 +921,13 @@ set_cmd_args(int argc, char *argv[])
unsigned long
conv_argv_part_num(const char *part_str)
{
- u8 ch;
+ unsigned char ch;
if (part_str[0] == '\0' || part_str[1] != '\0')
err(EINVAL, "Partnum string '%s' wrong length", part_str);
/* char signedness is implementation-defined */
- ch = (u8)part_str[0];
+ ch = (unsigned char)part_str[0];
if (ch < '0' || ch > '1')
err(EINVAL, "Bad part number (%c)", ch);
@@ -958,8 +950,8 @@ xstrxcmp(const char *a, const char *b, unsigned long maxlen)
err(EINVAL, "Empty string in xstrxcmp");
for (i = 0; i < maxlen; i++) {
- u8 ac = (u8)a[i];
- u8 bc = (u8)b[i];
+ unsigned char ac = (unsigned char)a[i];
+ unsigned char bc = (unsigned char)b[i];
if (ac == '\0' || bc == '\0') {
if (ac == bc)
@@ -1000,7 +992,7 @@ open_gbe_file(void)
if (gbe_st.st_nlink > 1)
fprintf(stderr,
"%s: warning: file has %lu hard links\n",
- fname, (ulong)gbe_st.st_nlink);
+ fname, (unsigned long)gbe_st.st_nlink);
if (gbe_st.st_nlink == 0)
err(EIO, "%s: file unlinked while open", fname);
@@ -1157,9 +1149,9 @@ read_checksums(void)
{
unsigned long p;
unsigned long skip_part;
- u8 arg_part;
- u8 num_invalid;
- u8 max_invalid;
+ unsigned char arg_part;
+ unsigned char num_invalid;
+ unsigned char max_invalid;
part_valid[0] = 0;
part_valid[1] = 0;
@@ -1195,7 +1187,7 @@ read_checksums(void)
if (num_invalid >= max_invalid) {
if (max_invalid == 1)
err(ECANCELED, "%s: part %lu has a bad checksum",
- fname, (ulong)part);
+ fname, (unsigned long)part);
err(ECANCELED, "%s: No valid checksum found in file",
fname);
}
@@ -1204,8 +1196,8 @@ read_checksums(void)
int
good_checksum(unsigned long partnum)
{
- ushort expected_checksum = calculated_checksum(partnum);
- ushort current_checksum = nvm_word(NVM_CHECKSUM_WORD, partnum);
+ unsigned short expected_checksum = calculated_checksum(partnum);
+ unsigned short current_checksum = nvm_word(NVM_CHECKSUM_WORD, partnum);
if (current_checksum == expected_checksum)
return 1;
@@ -1219,7 +1211,7 @@ run_cmd(unsigned long c)
check_command_num(c);
if (command[c].run == NULL)
- err(EINVAL, "Command %lu: null ptr", (ulong)c);
+ err(EINVAL, "Command %lu: null ptr", (unsigned long)c);
command[c].run();
}
@@ -1229,10 +1221,10 @@ check_command_num(unsigned long c)
{
if (!valid_command(c))
err(EINVAL, "Invalid run_cmd arg: %lu",
- (ulong)c);
+ (unsigned long)c);
}
-u8
+unsigned char
valid_command(unsigned long c)
{
if (c >= N_COMMANDS)
@@ -1240,7 +1232,7 @@ valid_command(unsigned long c)
if (c != command[c].chk)
err(EINVAL, "Invalid cmd chk value (%lu) vs arg: %lu",
- (ulong)command[c].chk, (ulong)c);
+ (unsigned long)command[c].chk, (unsigned long)c);
return 1;
}
@@ -1326,7 +1318,7 @@ set_mac_nib(unsigned long mac_str_pos,
unsigned long mac_byte_pos, unsigned long mac_nib_pos)
{
char mac_ch;
- ushort hex_num;
+ unsigned short hex_num;
mac_ch = mac_str[mac_str_pos + mac_nib_pos];
@@ -1351,17 +1343,17 @@ set_mac_nib(unsigned long mac_str_pos,
| ((mac_nib_pos ^ 1) << 2)); /* left or right nib? */
}
-ushort
+unsigned short
hextonum(char ch_s)
{
- u8 ch = (u8)ch_s;
+ unsigned char ch = (unsigned char)ch_s;
- if ((uint)(ch - '0') <= 9)
+ if ((unsigned int)(ch - '0') <= 9)
return ch - '0';
ch |= 0x20;
- if ((uint)(ch - 'a') <= 5)
+ if ((unsigned int)(ch - 'a') <= 5)
return ch - 'a' + 10;
if (ch == '?' || ch == 'x')
@@ -1370,13 +1362,13 @@ hextonum(char ch_s)
return 16; /* invalid character */
}
-ushort
+unsigned short
rhex(void)
{
struct x_st_timeval tv;
- ulong mix;
- static ulong counter = 0;
- ushort r;
+ unsigned long mix;
+ static unsigned long counter = 0;
+ unsigned short r;
/* Read /dev/urandom
* if possible */
@@ -1388,10 +1380,10 @@ rhex(void)
x_i_gettimeofday(&tv, NULL);
- mix = (ulong)tv.tv_sec
- ^ (ulong)tv.tv_usec
- ^ (ulong)getpid()
- ^ (ulong)&mix
+ mix = (unsigned long)tv.tv_sec
+ ^ (unsigned long)tv.tv_usec
+ ^ (unsigned long)getpid()
+ ^ (unsigned long)&mix
^ counter++
^ entropy_jitter();
@@ -1399,20 +1391,20 @@ rhex(void)
* Stack addresses can vary between
* calls, thus increasing entropy.
*/
- mix ^= (ulong)&mix;
- mix ^= (ulong)&tv;
- mix ^= (ulong)&counter;
+ mix ^= (unsigned long)&mix;
+ mix ^= (unsigned long)&tv;
+ mix ^= (unsigned long)&counter;
- return (ushort)(mix & 0xf);
+ return (unsigned short)(mix & 0xf);
}
-ushort
+unsigned short
read_urandom(void)
{
static int fd = -1;
static long n = -1;
- static u8 r[256];
+ static unsigned char r[256];
if (fd < 0) {
@@ -1444,11 +1436,11 @@ read_urandom(void)
return r[n--] & 0xf;
}
-ulong
+unsigned long
entropy_jitter(void)
{
struct x_st_timeval a, b;
- ulong mix = 0;
+ unsigned long mix = 0;
long mix_diff;
int i;
@@ -1465,8 +1457,8 @@ entropy_jitter(void)
if (mix_diff < 0)
mix_diff = -mix_diff;
- mix ^= (ulong)(mix_diff);
- mix ^= (ulong)&mix;
+ mix ^= (unsigned long)(mix_diff);
+ mix ^= (unsigned long)&mix;
}
return mix;
@@ -1502,7 +1494,7 @@ write_mac_part(unsigned long partnum)
set_nvm_word(w, partnum, mac_buf[w]);
printf("Wrote MAC address to part %lu: ",
- (ulong)partnum);
+ (unsigned long)partnum);
print_mac_from_nvm(partnum);
}
@@ -1519,11 +1511,11 @@ cmd_helper_dump(void)
fprintf(stderr,
"BAD checksum %04x in part %lu (expected %04x)\n",
nvm_word(NVM_CHECKSUM_WORD, partnum),
- (ulong)partnum,
+ (unsigned long)partnum,
calculated_checksum(partnum));
printf("MAC (part %lu): ",
- (ulong)partnum);
+ (unsigned long)partnum);
print_mac_from_nvm(partnum);
hexdump(partnum);
}
@@ -1533,13 +1525,13 @@ void
print_mac_from_nvm(unsigned long partnum)
{
unsigned long c;
- ushort val16;
+ unsigned short val16;
for (c = 0; c < 3; c++) {
val16 = nvm_word(c, partnum);
printf("%02x:%02x",
- (uint)(val16 & 0xff),
- (uint)(val16 >> 8));
+ (unsigned int)(val16 & 0xff),
+ (unsigned int)(val16 >> 8));
if (c == 2)
printf("\n");
else
@@ -1552,17 +1544,17 @@ hexdump(unsigned long partnum)
{
unsigned long c;
unsigned long row;
- ushort val16;
+ unsigned short val16;
for (row = 0; row < 8; row++) {
- printf("%08lx ", (ulong)((unsigned long)row << 4));
+ printf("%08lx ", (unsigned long)((unsigned long)row << 4));
for (c = 0; c < 8; c++) {
val16 = nvm_word((row << 3) + c, partnum);
if (c == 4)
printf(" ");
printf(" %02x %02x",
- (uint)(val16 & 0xff),
- (uint)(val16 >> 8));
+ (unsigned int)(val16 & 0xff),
+ (unsigned int)(val16 >> 8));
}
printf("\n");
}
@@ -1635,7 +1627,7 @@ cmd_helper_cat(void)
}
void
-cat_buf(u8 *b)
+cat_buf(unsigned char *b)
{
if (rw_file_exact(STDOUT_FILENO, b,
GBE_PART_SIZE, 0, IO_WRITE, LOOP_EAGAIN, LOOP_EINTR,
@@ -1650,7 +1642,7 @@ write_gbe_file(void)
struct stat tmp_st;
unsigned long p;
- u8 update_checksum;
+ unsigned char update_checksum;
if (command[cmd_index].flags == O_RDONLY)
return;
@@ -1693,16 +1685,16 @@ set_checksum(unsigned long p)
set_nvm_word(NVM_CHECKSUM_WORD, p, calculated_checksum(p));
}
-ushort
+unsigned short
calculated_checksum(unsigned long p)
{
unsigned long c;
- uint val16 = 0;
+ unsigned int val16 = 0;
for (c = 0; c < NVM_CHECKSUM_WORD; c++)
- val16 += (uint)nvm_word(c, p);
+ val16 += (unsigned int)nvm_word(c, p);
- return (ushort)((NVM_CHECKSUM - val16) & 0xffff);
+ return (unsigned short)((NVM_CHECKSUM - val16) & 0xffff);
}
/*
@@ -1713,7 +1705,7 @@ calculated_checksum(unsigned long p)
* file, but we assume otherwise and adapt accordingly.
*/
-ushort
+unsigned short
nvm_word(unsigned long pos16, unsigned long p)
{
unsigned long pos;
@@ -1721,20 +1713,20 @@ nvm_word(unsigned long pos16, unsigned long p)
check_nvm_bound(pos16, p);
pos = (pos16 << 1) + (p * GBE_PART_SIZE);
- return (ushort)buf[pos] |
- ((ushort)buf[pos + 1] << 8);
+ return (unsigned short)buf[pos] |
+ ((unsigned short)buf[pos + 1] << 8);
}
void
-set_nvm_word(unsigned long pos16, unsigned long p, ushort val16)
+set_nvm_word(unsigned long pos16, unsigned long p, unsigned short val16)
{
unsigned long pos;
check_nvm_bound(pos16, p);
pos = (pos16 << 1) + (p * GBE_PART_SIZE);
- buf[pos] = (u8)(val16 & 0xff);
- buf[pos + 1] = (u8)(val16 >> 8);
+ buf[pos] = (unsigned char)(val16 & 0xff);
+ buf[pos + 1] = (unsigned char)(val16 >> 8);
set_part_modified(p);
}
@@ -1759,7 +1751,7 @@ check_nvm_bound(unsigned long c, unsigned long p)
if (c >= NVM_WORDS)
err(ECANCELED, "check_nvm_bound: out of bounds %lu",
- (ulong)c);
+ (unsigned long)c);
}
void
@@ -1767,7 +1759,7 @@ check_bin(unsigned long a, const char *a_name)
{
if (a > 1)
err(EINVAL, "%s must be 0 or 1, but is %lu",
- a_name, (ulong)a);
+ a_name, (unsigned long)a);
}
void
@@ -1777,12 +1769,12 @@ rw_gbe_file_part(unsigned long p, int rw_type,
long r;
unsigned long gbe_rw_size = command[cmd_index].rw_size;
- u8 *mem_offset;
+ unsigned char *mem_offset;
off_t file_offset;
if (rw_type < IO_PREAD || rw_type > IO_PWRITE)
err(errno, "%s: %s: part %lu: invalid rw_type, %d",
- fname, rw_type_str, (ulong)p, rw_type);
+ fname, rw_type_str, (unsigned long)p, rw_type);
mem_offset = gbe_mem_offset(p, rw_type_str);
file_offset = (off_t)gbe_file_offset(p, rw_type_str);
@@ -1792,11 +1784,11 @@ rw_gbe_file_part(unsigned long p, int rw_type,
if (r == -1)
err(errno, "%s: %s: part %lu",
- fname, rw_type_str, (ulong)p);
+ fname, rw_type_str, (unsigned long)p);
if ((unsigned long)r != gbe_rw_size)
err(EIO, "%s: partial %s: part %lu",
- fname, rw_type_str, (ulong)p);
+ fname, rw_type_str, (unsigned long)p);
}
void
@@ -1890,9 +1882,9 @@ check_written_part(unsigned long p)
{
long r;
unsigned long gbe_rw_size;
- u8 *mem_offset;
+ unsigned char *mem_offset;
off_t file_offset;
- u8 *buf_restore;
+ unsigned char *buf_restore;
struct stat st;
if (!part_modified[p])
@@ -1956,22 +1948,22 @@ report_io_err_rw(void)
if (rw_check_err_read[p])
fprintf(stderr,
"%s: pread: p%lu (post-verification)\n",
- fname, (ulong)p);
+ fname, (unsigned long)p);
if (rw_check_partial_read[p])
fprintf(stderr,
"%s: partial pread: p%lu (post-verification)\n",
- fname, (ulong)p);
+ fname, (unsigned long)p);
if (rw_check_bad_part[p])
fprintf(stderr,
"%s: pwrite: corrupt write on p%lu\n",
- fname, (ulong)p);
+ fname, (unsigned long)p);
if (rw_check_err_read[p] ||
rw_check_partial_read[p]) {
fprintf(stderr,
"%s: p%lu: skipped checksum verification "
"(because read failed)\n",
- fname, (ulong)p);
+ fname, (unsigned long)p);
continue;
}
@@ -1984,7 +1976,7 @@ report_io_err_rw(void)
fprintf(stderr, "BAD");
fprintf(stderr, " checksum in p%lu on-disk.\n",
- (ulong)p);
+ (unsigned long)p);
if (post_rw_checksum[p]) {
fprintf(stderr,
@@ -2205,13 +2197,13 @@ err_fsync_dir:
* but used to check Gbe bounds in memory,
* and it is *also* used during file I/O.
*/
-u8 *
+unsigned char *
gbe_mem_offset(unsigned long p, const char *f_op)
{
off_t gbe_off = gbe_x_offset(p, f_op, "mem",
GBE_PART_SIZE, GBE_WORK_SIZE);
- return (u8 *)(buf + (unsigned long)gbe_off);
+ return (unsigned char *)(buf + (unsigned long)gbe_off);
}
/*
@@ -2252,7 +2244,7 @@ gbe_x_offset(unsigned long p, const char *f_op, const char *d_type,
}
long
-rw_gbe_file_exact(int fd, u8 *mem, unsigned long nrw,
+rw_gbe_file_exact(int fd, unsigned char *mem, unsigned long nrw,
off_t off, int rw_type)
{
unsigned long mem_addr;
@@ -2324,7 +2316,7 @@ err_rw_gbe_file_exact:
* otherwise it will return an error.
*/
long
-rw_file_exact(int fd, u8 *mem, unsigned long nrw,
+rw_file_exact(int fd, unsigned char *mem, unsigned long nrw,
off_t off, int rw_type, int loop_eagain,
int loop_eintr, unsigned long max_retries,
int off_reset)