86 lines
2.6 KiB
Go
86 lines
2.6 KiB
Go
package gokrazy
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import (
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"fmt"
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"io/ioutil"
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"log"
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"os"
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"syscall"
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)
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func mountfs() error {
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if err := syscall.Mount("tmpfs", "/tmp", "tmpfs", syscall.MS_NOSUID|syscall.MS_NODEV|syscall.MS_RELATIME, "size=50M"); err != nil {
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return fmt.Errorf("tmpfs on /tmp: %v", err)
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}
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// Symlink /etc/resolv.conf. We cannot do this in the root file
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// system itself, as FAT does not support symlinks.
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if err := syscall.Mount("tmpfs", "/etc", "tmpfs", syscall.MS_NOSUID|syscall.MS_NODEV|syscall.MS_RELATIME, "size=1M"); err != nil {
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return fmt.Errorf("tmpfs on /etc: %v", err)
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}
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if err := os.Symlink("/proc/net/pnp", "/etc/resolv.conf"); err != nil {
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return fmt.Errorf("etc: %v", err)
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}
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// Symlink /etc/localtime. We cannot do this in the root file
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// system, as FAT filenames are limited to 8.3.
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if err := os.Symlink("/localtim", "/etc/localtime"); err != nil {
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return fmt.Errorf("etc: %v", err)
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}
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if err := os.Mkdir("/etc/ssl", 0755); err != nil {
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return fmt.Errorf("/etc/ssl: %v", err)
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}
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if err := os.Symlink("/cacerts", "/etc/ssl/ca-bundle.pem"); err != nil {
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return fmt.Errorf("/etc/ssl: %v", err)
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}
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if err := ioutil.WriteFile("/etc/hosts", []byte("127.0.0.1 localhost\n::1 localhost\n"), 0644); err != nil {
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return fmt.Errorf("/etc/hosts: %v", err)
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}
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if err := syscall.Mount("devtmpfs", "/dev", "devtmpfs", 0, ""); err != nil {
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if sce, ok := err.(syscall.Errno); ok && sce == syscall.EBUSY {
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// /dev was already mounted (common in setups using nfsroot= or initramfs)
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} else {
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return fmt.Errorf("devtmpfs: %v", err)
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}
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}
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if err := os.MkdirAll("/dev/pts", 0755); err != nil {
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return fmt.Errorf("mkdir /dev/pts: %v", err)
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}
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if err := syscall.Mount("devpts", "/dev/pts", "devpts", 0, ""); err != nil {
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return fmt.Errorf("devpts: %v", err)
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}
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// /proc is useful for exposing process details and for
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// interactive debugging sessions.
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if err := syscall.Mount("proc", "/proc", "proc", 0, ""); err != nil {
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if sce, ok := err.(syscall.Errno); ok && sce == syscall.EBUSY {
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// /proc was already mounted (common in setups using nfsroot= or initramfs)
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} else {
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return fmt.Errorf("proc: %v", err)
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}
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}
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// /sys is useful for retrieving additional status from the
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// kernel, e.g. ethernet device carrier status.
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if err := syscall.Mount("sysfs", "/sys", "sysfs", 0, ""); err != nil {
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if sce, ok := err.(syscall.Errno); ok && sce == syscall.EBUSY {
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// /sys was already mounted (common in setups using nfsroot= or initramfs)
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} else {
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return fmt.Errorf("sys: %v", err)
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}
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}
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if err := syscall.Mount("/dev/mmcblk0p4", "/perm", "ext4", 0, ""); err != nil {
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log.Printf("Could not mount permanent storage partition: %v", err)
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}
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return nil
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}
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