diff options
| author | Leah Rowe <leah@libreboot.org> | 2023-06-01 11:56:01 +0100 |
|---|---|---|
| committer | Leah Rowe <leah@libreboot.org> | 2023-06-01 12:02:16 +0100 |
| commit | 18f39ab6fafde132af48350d7c976afa5716038f (patch) | |
| tree | 326e4626e92bbf3dbbb51df9f56de6a73913fa3d /util/nvmutil | |
| parent | 4d91bcc2d75ba9874ed352ef0fde5cfa128c4ebd (diff) | |
util/nvmutil: clean up rhex()
Signed-off-by: Leah Rowe <leah@libreboot.org>
Diffstat (limited to 'util/nvmutil')
| -rw-r--r-- | util/nvmutil/nvmutil.c | 5 | ||||
| -rw-r--r-- | util/nvmutil/nvmutil.h | 6 |
2 files changed, 6 insertions, 5 deletions
diff --git a/util/nvmutil/nvmutil.c b/util/nvmutil/nvmutil.c index d047e2a..fcdab9e 100644 --- a/util/nvmutil/nvmutil.c +++ b/util/nvmutil/nvmutil.c @@ -140,10 +140,9 @@ rhex(void) { static int rfd = -1, n = 0; static uint8_t rnum[16]; - if (!n) { - xopen(rfd, "/dev/urandom", O_RDONLY); + xopen(rfd, "/dev/urandom", O_RDONLY); + if (!n) xpread(rfd, (uint8_t *) &rnum, (n = 15) + 1, 0, "/dev/urandom"); - } return rnum[n--] & 0xf; } diff --git a/util/nvmutil/nvmutil.h b/util/nvmutil/nvmutil.h index c951148..1b928a3 100644 --- a/util/nvmutil/nvmutil.h +++ b/util/nvmutil/nvmutil.h @@ -51,8 +51,10 @@ int big_endian; #define ERR() errno = errno ? errno : ECANCELED #define err_if(x) if (x) err(ERR(), NULL) -#define xopen(f,l,p) if (opendir(l) != NULL) err(errno = EISDIR, "%s", l); \ - if (f == -1) if ((f = open(l, p)) == -1) err(ERR(), "%s", l); \ +#define xopen(f,l,p) \ + if (f == -1) \ + if (opendir(l) != NULL) err(errno = EISDIR, "%s", l); \ + if ((f = open(l, p)) == -1) err(ERR(), "%s", l); \ struct stat st; if (fstat(f, &st) == -1) err(ERR(), "%s", l) #define xpread(f, b, n, o, l) if (pread(f, b, n, o) == -1) err(ERR(), "%s", l) #define handle_endianness() if (big_endian) xorswap_buf(p) |