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util/nvmutil: don't initialise rbuf unless needed 

previously, it was always initialised, but now it's only
initialised if '?' is used on a mac address character in
command `setmac`

this is done by simply moving mac address character
randomisation to a separate function
fsdg20230625
Leah Rowe 2022-12-03 12:27:53 +00:00
parent 851892b464
commit 036d710776
1 changed files with 22 additions and 15 deletions
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37
util/nvmutil/nvmutil.c
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@ -36,6 +36,7 @@ ssize_t readFromFile(int *fd, uint8_t *buf, const char *path, int flags,
size_t size);
void cmd_setmac(const char *strMac);
uint8_t hextonum(char chs);
uint8_t rhex(void);
void cmd_dump(void);
void showmac(int partnum);
void hexdump(int partnum);
@ -217,6 +218,26 @@ uint8_t
hextonum(char chs)
{
uint8_t val8, ch;
ch = (uint8_t) chs;
if ((ch >= '0') && ch <= '9') {
val8 = ch - '0';
} else if ((ch >= 'A') && (ch <= 'F')) {
val8 = ch - 'A' + 10;
} else if ((ch >= 'a') && (ch <= 'f')) {
val8 = ch - 'a' + 10;
} else if (ch == '?') {
val8 = rhex();
} else {
return 16;
}
return val8;
}
uint8_t
rhex(void)
{
static int rfd = -1;
static uint8_t *rbuf = NULL;
static size_t rindex = BUFSIZ;
@ -237,21 +258,7 @@ hextonum(char chs)
}
}
ch = (uint8_t) chs;
if ((ch >= '0') && ch <= '9') {
val8 = ch - '0';
} else if ((ch >= 'A') && (ch <= 'F')) {
val8 = ch - 'A' + 10;
} else if ((ch >= 'a') && (ch <= 'f')) {
val8 = ch - 'a' + 10;
} else if (ch == '?') {
val8 = rbuf[rindex++] & 0xf;
} else {
return 16;
}
return val8;
return rbuf[rindex++] & 0xf;
}
void