wip: do not expose helper functions

Signed-off-by: Jake Correnti <jakecorrenti+github@proton.me>

Author: jakecorrenti

init/fs.c

@@ -1,5 +1,8 @@
 #include "fs.h"
 
+static int try_mount(const char *source, const char *target, const char *fstype,
+              unsigned long mountflags, const void *data);
+
 void setup_root_block_device(void)
 {
     int fd;
@@ -116,7 +119,7 @@ int mount_filesystems()
     return 0;
 }
 
-int try_mount(const char *source, const char *target, const char *fstype,
+static int try_mount(const char *source, const char *target, const char *fstype,
               unsigned long mountflags, const void *data)
 {
     FILE *f;

init/fs.h

@@ -17,7 +17,5 @@
 void setup_root_block_device(void);
 int is_virtiofs(const char *path);
 int mount_filesystems();
-int try_mount(const char *source, const char *target, const char *fstype,
-              unsigned long mountflags, const void *data);
 
 #endif

init/utils.c

@@ -6,8 +6,11 @@ char DEFAULT_KRUN_INIT[] = "/bin/sh";
 static int reopen_fd(int fd, char *path, int flags);
 static void exec_child(char **exec_argv, int *saved_errno);
 static void parent_proc_wait(int child, int *status);
+static void set_exit_code(int code);
+static int setup_redirects(void);
+static void set_rlimits(const char *rlimits);
 
-void set_exit_code(int code)
+static void set_exit_code(int code)
 {
     int fd;
     int ret;
@@ -38,7 +41,7 @@ void set_exit_code(int code)
     close(fd);
 }
 
-int setup_redirects()
+static int setup_redirects()
 {
     DIR *ports_dir = opendir("/sys/class/virtio-ports");
     if (ports_dir == NULL) {
@@ -107,7 +110,7 @@ static int reopen_fd(int fd, char *path, int flags)
     return 0;
 }
 
-void set_rlimits(const char *rlimits)
+static void set_rlimits(const char *rlimits)
 {
     unsigned long long int lim_id, lim_cur, lim_max;
     struct rlimit rlim;

init/utils.h

@@ -16,15 +16,10 @@
 #include <sys/resource.h>
 
 #define KRUN_EXIT_CODE_IOCTL 0x7602
-
 #define MAX_PASS_SIZE 512
-
 #define KRUN_MAGIC "KRUN"
 #define KRUN_FOOTER_LEN 12
 
-void set_exit_code(int code);
-int setup_redirects(void);
-void set_rlimits(const char *rlimits);
 void setup_socket(void);
 void exec_init(char ***config_argv, char ***exec_argv);
 void handle_env_variables(char *config_workdir);