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-rw-r--r--Makefile9
-rw-r--r--conf.c6
-rw-r--r--passt.c9
-rw-r--r--pasta.c16
-rw-r--r--pcap.c5
-rw-r--r--tap.c3
-rw-r--r--tcp_splice.c11
-rw-r--r--util.c2
8 files changed, 30 insertions, 31 deletions
diff --git a/Makefile b/Makefile
index e972e88..2cb3735 100644
--- a/Makefile
+++ b/Makefile
@@ -180,13 +180,6 @@ pkgs: static
# - readability-isolate-declaration
# Dubious value, would kill readability
#
-# - android-cloexec-open
-# - android-cloexec-pipe
-# - android-cloexec-pipe2
-# - android-cloexec-epoll-create1
-# - android-cloexec-inotify-init1
-# TODO: check, fix except for the few cases where we need to share fds
-#
# - bugprone-narrowing-conversions
# - cppcoreguidelines-narrowing-conversions
# TODO: nice to fix eventually
@@ -228,8 +221,6 @@ clang-tidy: $(wildcard *.c) $(wildcard *.h)
-llvm-include-order,\
-cppcoreguidelines-avoid-magic-numbers,\
-readability-isolate-declaration,\
- -android-cloexec-open,-android-cloexec-pipe,-android-cloexec-pipe2,\
- -android-cloexec-epoll-create1,-android-cloexec-inotify-init1,\
-bugprone-narrowing-conversions,\
-cppcoreguidelines-narrowing-conversions,\
-cppcoreguidelines-avoid-non-const-global-variables,\
diff --git a/conf.c b/conf.c
index 80f4303..ea51de4 100644
--- a/conf.c
+++ b/conf.c
@@ -285,7 +285,7 @@ static void get_dns(struct ctx *c)
if (dns_set && dnss_set)
return;
- if ((fd = open("/etc/resolv.conf", O_RDONLY)) < 0)
+ if ((fd = open("/etc/resolv.conf", O_RDONLY | O_CLOEXEC)) < 0)
goto out;
while (!(*buf = 0) && line_read(buf, BUFSIZ, fd)) {
@@ -406,13 +406,17 @@ static int conf_ns_opt(struct ctx *c,
continue;
}
+ /* Don't pass O_CLOEXEC here: ns_enter() needs those files */
if (!c->netns_only) {
if (*conf_userns)
+ /* NOLINTNEXTLINE(android-cloexec-open) */
ufd = open(conf_userns, O_RDONLY);
else if (*userns)
+ /* NOLINTNEXTLINE(android-cloexec-open) */
ufd = open(userns, O_RDONLY);
}
+ /* NOLINTNEXTLINE(android-cloexec-open) */
nfd = open(netns, O_RDONLY);
if (nfd == -1 || (ufd == -1 && !c->netns_only)) {
diff --git a/passt.c b/passt.c
index 6de9e5e..c63a3cb 100644
--- a/passt.c
+++ b/passt.c
@@ -202,7 +202,7 @@ static void check_root(void)
if (getuid() && geteuid())
return;
- if ((fd = open("/proc/self/uid_map", O_RDONLY)) < 0)
+ if ((fd = open("/proc/self/uid_map", O_RDONLY | O_CLOEXEC)) < 0)
return;
if (read(fd, buf, BUFSIZ) > 0 &&
@@ -359,7 +359,7 @@ int main(int argc, char **argv)
if (!c.debug && (c.stderr || isatty(fileno(stdout))))
__openlog(log_name, LOG_PERROR, LOG_DAEMON);
- c.epollfd = epoll_create1(0);
+ c.epollfd = epoll_create1(c.foreground ? O_CLOEXEC : 0);
if (c.epollfd == -1) {
perror("epoll_create1");
exit(EXIT_FAILURE);
@@ -405,11 +405,12 @@ int main(int argc, char **argv)
pcap_init(&c);
if (!c.foreground)
+ /* NOLINTNEXTLINE(android-cloexec-open): see __daemon() */
devnull_fd = open("/dev/null", O_RDWR);
if (*c.pid_file)
- pidfile_fd = open(c.pid_file,
- O_CREAT | O_WRONLY, S_IRUSR | S_IWUSR);
+ pidfile_fd = open(c.pid_file, O_CREAT | O_WRONLY | O_CLOEXEC,
+ S_IRUSR | S_IWUSR);
if (sandbox(&c)) {
err("Failed to sandbox process, exiting\n");
diff --git a/pasta.c b/pasta.c
index 96866c6..18df5d2 100644
--- a/pasta.c
+++ b/pasta.c
@@ -78,6 +78,7 @@ void pasta_child_handler(int signal)
static int pasta_wait_for_ns(void *arg)
{
struct ctx *c = (struct ctx *)arg;
+ int flags = O_RDONLY | O_CLOEXEC;
char ns[PATH_MAX];
if (c->netns_only)
@@ -85,14 +86,14 @@ static int pasta_wait_for_ns(void *arg)
snprintf(ns, PATH_MAX, "/proc/%i/ns/user", pasta_child_pid);
do
- while ((c->pasta_userns_fd = open(ns, O_RDONLY)) < 0);
+ while ((c->pasta_userns_fd = open(ns, flags)) < 0);
while (setns(c->pasta_userns_fd, CLONE_NEWUSER) &&
!close(c->pasta_userns_fd));
netns:
snprintf(ns, PATH_MAX, "/proc/%i/ns/net", pasta_child_pid);
do
- while ((c->pasta_netns_fd = open(ns, O_RDONLY)) < 0);
+ while ((c->pasta_netns_fd = open(ns, flags)) < 0);
while (setns(c->pasta_netns_fd, CLONE_NEWNET) &&
!close(c->pasta_netns_fd));
@@ -126,23 +127,23 @@ static int pasta_setup_ns(void *arg)
snprintf(buf, BUFSIZ, "%i %i %i", 0, a->euid, 1);
- fd = open("/proc/self/uid_map", O_WRONLY);
+ fd = open("/proc/self/uid_map", O_WRONLY | O_CLOEXEC);
if (write(fd, buf, strlen(buf)) < 0)
warn("Cannot set uid_map in namespace");
close(fd);
- fd = open("/proc/self/setgroups", O_WRONLY);
+ fd = open("/proc/self/setgroups", O_WRONLY | O_CLOEXEC);
if (write(fd, "deny", sizeof("deny")) < 0)
warn("Cannot write to setgroups in namespace");
close(fd);
- fd = open("/proc/self/gid_map", O_WRONLY);
+ fd = open("/proc/self/gid_map", O_WRONLY | O_CLOEXEC);
if (write(fd, buf, strlen(buf)) < 0)
warn("Cannot set gid_map in namespace");
close(fd);
}
- fd = open("/proc/sys/net/ipv4/ping_group_range", O_WRONLY);
+ fd = open("/proc/sys/net/ipv4/ping_group_range", O_WRONLY | O_CLOEXEC);
if (write(fd, "0 0", strlen("0 0")) < 0)
warn("Cannot set ping_group_range, ICMP requests might fail");
close(fd);
@@ -231,13 +232,14 @@ void pasta_ns_conf(struct ctx *c)
*/
int pasta_netns_quit_init(struct ctx *c)
{
+ int flags = O_NONBLOCK | (c->foreground ? O_CLOEXEC : 0);
struct epoll_event ev = { .events = EPOLLIN };
int inotify_fd;
if (c->mode != MODE_PASTA || c->no_netns_quit || !*c->netns_base)
return -1;
- if ((inotify_fd = inotify_init1(O_NONBLOCK)) < 0) {
+ if ((inotify_fd = inotify_init1(flags)) < 0) {
perror("inotify_init(): won't quit once netns is gone");
return -1;
}
diff --git a/pcap.c b/pcap.c
index e5b8b72..296bbb5 100644
--- a/pcap.c
+++ b/pcap.c
@@ -170,6 +170,7 @@ fail:
*/
void pcap_init(struct ctx *c)
{
+ int flags = O_WRONLY | O_CREAT | O_TRUNC;
struct timeval tv;
if (pcap_fd != -1)
@@ -200,8 +201,8 @@ void pcap_init(struct ctx *c)
strncpy(c->pcap, name, PATH_MAX);
}
- pcap_fd = open(c->pcap, O_WRONLY | O_CREAT | O_TRUNC,
- S_IRUSR | S_IWUSR);
+ flags |= c->foreground ? O_CLOEXEC : 0;
+ pcap_fd = open(c->pcap, flags, S_IRUSR | S_IWUSR);
if (pcap_fd == -1) {
perror("open");
return;
diff --git a/tap.c b/tap.c
index 8415d5a..6333015 100644
--- a/tap.c
+++ b/tap.c
@@ -875,12 +875,13 @@ static int tun_ns_fd = -1;
static int tap_ns_tun(void *arg)
{
struct ifreq ifr = { .ifr_flags = IFF_TAP | IFF_NO_PI };
+ int flags = O_RDWR | O_NONBLOCK | O_CLOEXEC;
struct ctx *c = (struct ctx *)arg;
strncpy(ifr.ifr_name, c->pasta_ifn, IFNAMSIZ);
if (ns_enter(c) ||
- (tun_ns_fd = open("/dev/net/tun", O_RDWR | O_NONBLOCK)) < 0 ||
+ (tun_ns_fd = open("/dev/net/tun", flags)) < 0 ||
ioctl(tun_ns_fd, TUNSETIFF, &ifr) ||
!(c->pasta_ifi = if_nametoindex(c->pasta_ifn)))
tun_ns_fd = -1;
diff --git a/tcp_splice.c b/tcp_splice.c
index 0f4f485..714571c 100644
--- a/tcp_splice.c
+++ b/tcp_splice.c
@@ -370,8 +370,8 @@ static int tcp_splice_connect_finish(const struct ctx *c,
}
if (conn->pipe_a_b[0] < 0) {
- if (pipe2(conn->pipe_a_b, O_NONBLOCK) ||
- pipe2(conn->pipe_b_a, O_NONBLOCK)) {
+ if (pipe2(conn->pipe_a_b, O_NONBLOCK | O_CLOEXEC) ||
+ pipe2(conn->pipe_b_a, O_NONBLOCK | O_CLOEXEC)) {
conn_flag(c, conn, CLOSING);
return -EIO;
}
@@ -773,7 +773,7 @@ static void tcp_set_pipe_size(struct ctx *c)
smaller:
for (i = 0; i < TCP_SPLICE_PIPE_POOL_SIZE * 2; i++) {
- if (pipe2(probe_pipe[i], 0)) {
+ if (pipe2(probe_pipe[i], O_CLOEXEC)) {
i++;
break;
}
@@ -809,9 +809,9 @@ static void tcp_splice_pipe_refill(const struct ctx *c)
for (i = 0; i < TCP_SPLICE_PIPE_POOL_SIZE; i++) {
if (splice_pipe_pool[i][0][0] >= 0)
break;
- if (pipe2(splice_pipe_pool[i][0], O_NONBLOCK))
+ if (pipe2(splice_pipe_pool[i][0], O_NONBLOCK | O_CLOEXEC))
continue;
- if (pipe2(splice_pipe_pool[i][1], O_NONBLOCK)) {
+ if (pipe2(splice_pipe_pool[i][1], O_NONBLOCK | O_CLOEXEC)) {
close(splice_pipe_pool[i][1][0]);
close(splice_pipe_pool[i][1][1]);
continue;
@@ -832,7 +832,6 @@ void tcp_splice_init(struct ctx *c)
{
memset(splice_pipe_pool, 0xff, sizeof(splice_pipe_pool));
tcp_set_pipe_size(c);
- tcp_splice_pipe_refill(c);
}
/**
diff --git a/util.c b/util.c
index 83eba82..81cf744 100644
--- a/util.c
+++ b/util.c
@@ -495,7 +495,7 @@ void procfs_scan_listen(struct ctx *c, uint8_t proto, int ip_version, int ns,
if (*fd != -1)
lseek(*fd, 0, SEEK_SET);
- else if ((*fd = open(path, O_RDONLY)) < 0)
+ else if ((*fd = open(path, O_RDONLY | O_CLOEXEC)) < 0)
return;
*line = 0;
generated by cgit v1.2.3 (git 2.25.1) at 2024-12-24 18:35:58 +0000