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util/nvmutil: code cleanup (pledge/unveil calls) 

Signed-off-by: Leah Rowe <leah@libreboot.org>
fsdg20230625
Leah Rowe 2023-06-01 14:04:44 +01:00
parent 69fa333e25
commit 99258a38ae
2 changed files with 6 additions and 11 deletions
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13
util/nvmutil/nvmutil.c
View File

@ -18,7 +18,6 @@ main(int argc, char *argv[])
if (argc == 3) {
if (strcmp(COMMAND, "dump") == 0) {
xpledge("stdio", NULL);
cmd = &cmd_dump;
} else if (strcmp(COMMAND, "setmac") == 0) {
strMac = (char *) strRMac; /* random mac address */
@ -41,7 +40,6 @@ main(int argc, char *argv[])
nf = SIZE_4KB;
}
}
err_if((errno = ((strMac == NULL) && (cmd == NULL)) ? EINVAL : errno));
skipread[part ^ 1] = (cmd == &cmd_copy) | (cmd == &cmd_setchecksum)
@ -61,10 +59,11 @@ main(int argc, char *argv[])
void
openFiles(const char *path)
{
(void)rhex();
struct stat st;
xopen(fd, path, flags);
if ((st.st_size != SIZE_8KB))
err(errno = ECANCELED, "File `%s` not 8KiB", path);
xopen(rfd, "/dev/urandom", O_RDONLY);
errno = errno != ENOTDIR ? errno : 0;
xunveil("/dev/urandom", "r");
if (flags != O_RDONLY) {
@ -145,14 +144,10 @@ hextonum(char ch)
uint8_t
rhex(void)
{
static int rfd = -1, n = 0;
static int n = 0;
static uint8_t rnum[16];
if (!n) {
if (rfd == -1) {
xopen(rfd, "/dev/urandom", O_RDONLY);
}
if (!n)
xpread(rfd, (uint8_t *) &rnum, (n = 15) + 1, 0, "/dev/urandom");
}
return rnum[n--] & 0xf;
}

4
util/nvmutil/nvmutil.h
View File

@ -43,7 +43,7 @@ uint8_t *buf = (uint8_t *) &buf16;
size_t nf = 128, gbe[2];
uint8_t skipread[2] = {0, 0};
int flags = O_RDWR, fd = -1, part, gbeFileModified = 0;
int flags = O_RDWR, rfd, fd, part, gbeFileModified = 0;
uint8_t nvmPartModified[2] = {0, 0};
int test = 1;
@ -54,7 +54,7 @@ int big_endian;
#define xopen(f,l,p) 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)
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)
#define xpwrite(f, b, n, o, l) if (pwrite(f, b, n, o) == -1) err(ERR(), "%s", l)