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path: root/src/random-seed/random-seed.c
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Diffstat (limited to 'src/random-seed/random-seed.c')
-rw-r--r--src/random-seed/random-seed.c60
1 files changed, 30 insertions, 30 deletions
diff --git a/src/random-seed/random-seed.c b/src/random-seed/random-seed.c
index ce1bd195d2..92176b1e9f 100644
--- a/src/random-seed/random-seed.c
+++ b/src/random-seed/random-seed.c
@@ -38,7 +38,7 @@ int main(int argc, char *argv[]) {
ssize_t k;
int r;
FILE *f;
- bool cleanup_seed_file = true;
+ bool refresh_seed_file = true;
if (argc != 2) {
log_error("This program requires one argument.");
@@ -87,33 +87,29 @@ int main(int argc, char *argv[]) {
if (seed_fd < 0) {
seed_fd = open(RANDOM_SEED, O_RDONLY|O_CLOEXEC|O_NOCTTY);
if (seed_fd < 0) {
- log_error_errno(errno, "Failed to open " RANDOM_SEED ": %m");
- r = -errno;
+ r = log_error_errno(errno, "Failed to open " RANDOM_SEED ": %m");
goto finish;
}
- cleanup_seed_file = false;
+
+ refresh_seed_file = false;
}
random_fd = open("/dev/urandom", O_RDWR|O_CLOEXEC|O_NOCTTY, 0600);
if (random_fd < 0) {
random_fd = open("/dev/urandom", O_WRONLY|O_CLOEXEC|O_NOCTTY, 0600);
if (random_fd < 0) {
- log_error_errno(errno, "Failed to open /dev/urandom: %m");
- r = -errno;
+ r = log_error_errno(errno, "Failed to open /dev/urandom: %m");
goto finish;
}
}
k = loop_read(seed_fd, buf, buf_size, false);
- if (k <= 0) {
-
- if (r != 0)
- log_error_errno(errno, "Failed to read seed from " RANDOM_SEED ": %m");
-
- r = k == 0 ? -EIO : (int) k;
-
- } else {
- lseek(seed_fd, 0, SEEK_SET);
+ if (k < 0)
+ r = log_error_errno(k, "Failed to read seed from " RANDOM_SEED ": %m");
+ else if (k == 0)
+ log_debug("Seed file " RANDOM_SEED " not yet initialized, proceeding.");
+ else {
+ (void) lseek(seed_fd, 0, SEEK_SET);
r = loop_write(random_fd, buf, (size_t) k, false);
if (r < 0)
@@ -124,40 +120,44 @@ int main(int argc, char *argv[]) {
seed_fd = open(RANDOM_SEED, O_WRONLY|O_CLOEXEC|O_NOCTTY|O_CREAT, 0600);
if (seed_fd < 0) {
- log_error_errno(errno, "Failed to open " RANDOM_SEED ": %m");
- r = -errno;
+ r = log_error_errno(errno, "Failed to open " RANDOM_SEED ": %m");
goto finish;
}
random_fd = open("/dev/urandom", O_RDONLY|O_CLOEXEC|O_NOCTTY);
if (random_fd < 0) {
- log_error_errno(errno, "Failed to open /dev/urandom: %m");
- r = -errno;
+ r = log_error_errno(errno, "Failed to open /dev/urandom: %m");
goto finish;
}
} else {
- log_error("Unknown verb %s.", argv[1]);
+ log_error("Unknown verb '%s'.", argv[1]);
r = -EINVAL;
goto finish;
}
- if (cleanup_seed_file) {
+ if (refresh_seed_file) {
+
/* This is just a safety measure. Given that we are root and
* most likely created the file ourselves the mode and owner
* should be correct anyway. */
- fchmod(seed_fd, 0600);
- fchown(seed_fd, 0, 0);
+ (void) fchmod(seed_fd, 0600);
+ (void) fchown(seed_fd, 0, 0);
k = loop_read(random_fd, buf, buf_size, false);
- if (k <= 0) {
- log_error("Failed to read new seed from /dev/urandom: %s", r < 0 ? strerror(-r) : "EOF");
- r = k == 0 ? -EIO : (int) k;
- } else {
- r = loop_write(seed_fd, buf, (size_t) k, false);
- if (r < 0)
- log_error_errno(r, "Failed to write new random seed file: %m");
+ if (k < 0) {
+ r = log_error_errno(k, "Failed to read new seed from /dev/urandom: %m");
+ goto finish;
}
+ if (k == 0) {
+ log_error("Got EOF while reading from /dev/urandom.");
+ r = -EIO;
+ goto finish;
+ }
+
+ r = loop_write(seed_fd, buf, (size_t) k, false);
+ if (r < 0)
+ log_error_errno(r, "Failed to write new random seed file: %m");
}
finish: