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fix: resolve dev/urandom mount error inside container using mknod fallback

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joshpatra committed 2026-07-08 10:16:22 -04:00
1 parent 85e4499ebb
commit aa4ce0d5ac
1 file changed
+21 -8
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gamdl-aio/wrapper-v2/src/launcher/wrapper.c
+21 -8
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@@ -33,6 +33,7 @@
#include <sys/stat.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <sys/sysmacros.h>
#include <unistd.h>
extern char** environ;
@@ -109,16 +110,28 @@ int main(int argc, char* argv[], char* envp[]) {
if (ensure_dir(ROOTFS "/dev", 0755) != 0) return 1;
int fd = open(ROOTFS "/dev/urandom", O_CREAT | O_RDWR, 0666);
if (fd < 0) {
fprintf(stderr, "wrapper: open %s/dev/urandom: %s\n", ROOTFS, strerror(errno));
return 1;
struct stat st;
if (stat(ROOTFS "/dev/urandom", &st) == 0) {
if (!S_ISCHR(st.st_mode)) {
unlink(ROOTFS "/dev/urandom");
}
}
close(fd);
if (mount("/dev/urandom", ROOTFS "/dev/urandom", NULL, MS_BIND, NULL) != 0) {
fprintf(stderr, "wrapper: bind-mount /dev/urandom: %s\n", strerror(errno));
return 1;
if (stat(ROOTFS "/dev/urandom", &st) != 0) {
if (mknod(ROOTFS "/dev/urandom", S_IFCHR | 0666, makedev(1, 9)) != 0) {
fprintf(stderr, "wrapper: mknod /dev/urandom failed: %s, trying bind-mount\n", strerror(errno));
int fd = open(ROOTFS "/dev/urandom", O_CREAT | O_RDWR, 0666);
if (fd < 0) {
fprintf(stderr, "wrapper: open %s/dev/urandom: %s\n", ROOTFS, strerror(errno));
return 1;
}
close(fd);
if (mount("/dev/urandom", ROOTFS "/dev/urandom", NULL, MS_BIND, NULL) != 0) {
fprintf(stderr, "wrapper: bind-mount /dev/urandom: %s\n", strerror(errno));
return 1;
}
}
}
if (chdir(ROOTFS) != 0) {