fw_printfenv不可用(Error locking file /var/lock/fw_printenv.lock)

htujun LV 3

tina-v851s 的fw_printfenv报错。

分区表如下：

[partition_start]

[partition]
    name         = boot
    size         = 7040
    downloadfile = "boot.fex"
    user_type    = 0x8000

[partition]
    name         = rootfs
    size         = 11264
    downloadfile = "rootfs.fex"
    user_type    = 0x8000

[partition]
    name         = extend
    size         = 7040
    downloadfile = "usr.fex"
    user_type    = 0x8000

[partition]
    name         = rootfs_data
    size         = 1024
    user_type    = 0x8000

[partition]
   name         = env
   size         = 512
   downloadfile = "env_nor.fex"
   user_type    = 0x8000

fw_env.config如下:

# Configuration file for fw_(printenv/setenv) utility.
# Up to two entries are valid, in this case the redundant
# environment sector is assumed present.
# Notice, that the "Number of sectors" is not required on NOR and SPI-dataflash.
# Futhermore, if the Flash sector size is omitted, this value is assumed to
# be the same as the Environment size, which is valid for NOR and SPI-dataflash
# Device offset must be prefixed with 0x to be parsed as a hexadecimal value.

# NOR example
# MTD device name       Device offset   Env. size       Flash sector size       Number of sectors
# /dev/mtd1             0x0000          0x4000          0x4000
# /dev/mtd2             0x0000          0x4000          0x4000

# MTD SPI-dataflash example
# MTD device name       Device offset   Env. size       Flash sector size       Number of sectors
#/dev/mtd5              0x4200          0x4200
#/dev/mtd6              0x4200          0x4200

# NAND example
#/dev/mtd0              0x4000          0x4000          0x20000                 2

# On a block device a negative offset is treated as a backwards offset from the
# end of the device/partition, rather than a forwards offset from the start.

# Block device example
#/dev/mmcblk0           0xc0000         0x20000
#/dev/mmcblk0           -0x20000        0x20000

# VFAT example
#/boot/uboot.env        0x0000          0x4000

# UBI volume
#/dev/ubi0_0            0x0             0x1f000         0x1f000
#/dev/ubi0_1            0x0             0x1f000         0x1f000

# UBI volume by name
#/dev/ubi0:env          0x0             0x1f000         0x1f000
#/dev/ubi0:env-redund   0x0             0x1f000         0x1f000

# Allwinner Tina
/dev/by-name/env        0x0000          0x20000

分区如下：

root@(none):/mnt/extsd# cat /proc/mtd 
dev:    size   erasesize  name
mtd0: 00200000 00010000 "uboot"
mtd1: 00370000 00010000 "boot"
mtd2: 00580000 00010000 "rootfs"
mtd3: 00370000 00010000 "extend"
mtd4: 00040000 00010000 "env"
mtd5: 00080000 00010000 "rootfs_data"
mtd6: 010e0000 00010000 "UDISK"

root@(none):/mnt/extsd# fw_printenv 
Error locking file /var/lock/fw_printenv.lock
root@(none):/mnt/extsd# fw_setenv 
Error locking file /var/lock/fw_printenv.lock

htujun LV 3

v851s-fastboot的麻烦看下？给个方向

TEVET LV 7

@lishengyin 遇到相同问题，我的是SPI NAND 作为存储器，大佬解决了吗

htujun LV 3

@tevet - make_kernel_menuconfig 搜索 CONFIG_FILE_LOCKING，打开如下配置，重新编译即可。

默认不编译POSIX标准文件锁定API，所以程序执行到文件加锁与解锁的flock()时失败。

# fw_env_main.c
    if (-1 == flock(lockfd, LOCK_EX)) {
        fprintf(stderr, "Error locking file %s\n", lockname);
        close(lockfd);
        return EXIT_FAILURE;
    }

TEVET LV 7

@lishengyin 非常感谢