/* read_full reads exactly |len| bytes from |fd| to |out|. On error or end of
* file, it returns zero. */
static int read_full(int fd, void *out, size_t len) {
while (len > 0) {
ssize_t ret = read_eintr(fd, out, len);
if (ret <= 0) {
return 0;
}
out = (uint8_t *)out + ret;
len -= ret;
}
return 1;
}
/* read_full reads exactly |len| bytes from |fd| to |out|. On error or end of
* file, it returns zero. */
static int read_full(int fd, void *out, size_t len) {
char *outp = out;
while (len > 0) {
ssize_t ret = read_eintr(fd, outp, len);
if (ret <= 0) {
return 0;
}
outp += ret;
len -= ret;
}
return 1;
}
/* read_file opens |path| and reads until end-of-file. On success, it returns
* one and sets |*out_ptr| and |*out_len| to a newly-allocated buffer with the
* contents. Otherwise, it returns zero. */
static int read_file(char **out_ptr, size_t *out_len, const char *path) {
int fd = open_eintr(path, O_RDONLY);
if (fd < 0) {
return 0;
}
static const size_t kReadSize = 1024;
int ret = 0;
size_t cap = kReadSize, len = 0;
char *buf = OPENSSL_malloc(cap);
if (buf == NULL) {
goto err;
}
for (;;) {
if (cap - len < kReadSize) {
size_t new_cap = cap * 2;
if (new_cap < cap) {
goto err;
}
char *new_buf = OPENSSL_realloc(buf, new_cap);
if (new_buf == NULL) {
goto err;
}
buf = new_buf;
cap = new_cap;
}
ssize_t bytes_read = read_eintr(fd, buf + len, kReadSize);
if (bytes_read < 0) {
goto err;
}
if (bytes_read == 0) {
break;
}
len += bytes_read;
}
*out_ptr = buf;
*out_len = len;
ret = 1;
buf = NULL;
err:
OPENSSL_free(buf);
close(fd);
return ret;
}