[Sony Xperia S, Acro S, Ion] letama:
It could but access rights on /dev/smd* are ok, and accessing the file would be displayed in strace.

Anyway, here is my ueventd.semc.rc if you want to compare...

/dev/msm_vpe_standalone 0777 system system

/sys/devices/i2c-3/3-0040/leds/lcd-backlight als/enable 0600 system system

# delay_* don't trigger uevent, they are useless here. kernel is hacked to support them
# /sys/devices/i2c-3/3-0040/leds/* delay_on 0600 system system
# /sys/devices/i2c-3/3-0040/leds/* delay_off 0600 system system
/sys/devices/i2c-3/3-0040/leds/* brightness 0600 system system
/sys/devices/i2c-3/3-0040/leds/* trigger 0600 system system

### start from CAF/system/core/rootdir/ueventd.rc
/dev/rtc0 0600 system system

# the DIAG device node is world writable/readable.
/dev/diag 0666 root root

# the genlock client device node is world writable/readable.
/dev/genlock 0666 root root

# gpu driver for adreno200 is globally accessible
/dev/kgsl-3d0 0666 root root
/dev/kgsl-2d0 0666 root root
/dev/kgsl-2d1 0666 root root

/dev/ion 0664 system system

/dev/rfkill 0660 wifi wifi

# these should not be world writable
/dev/ttyHS0 0600 bluetooth bluetooth
/dev/sdio_tty_ciq_00 0660 system system
/dev/msm_rotator 0664 system system
/dev/pmem_audio 0660 system audio
/dev/pmem_swiqi 0660 system audio
/dev/pmem_tzcom 0660 system audio
/dev/pmem_smipool* 0660 system camera
/dev/msm_camera/* 0660 system camera
/dev/video* 0660 system camera
/dev/media* 0660 system camera
/dev/v4l-subdev* 0660 system camera
/dev/gemini0 0660 system camera
/dev/gemini/ 0660 system camera
/dev/radio0 0644 fm_radio fm_radio
/dev/i2c-2 0664 root system
/dev/i2c-4 0664 root system
/dev/msm_mvs 0660 system audio
/dev/msm_voicememo 0660 system audio
/dev/tzcom 0660 system audio
/dev/qseecom 0660 system audio
/dev/qce 0660 system audio
/dev/msm_pcm_lp_dec 0660 system audio
/dev/smd4 0660 system system
/dev/smd7 0640 radio radio
/dev/smdcntl0 0640 radio radio
/dev/smdcntl1 0640 radio radio
/dev/smdcntl2 0640 radio radio
/dev/smdcntl3 0640 radio radio
/dev/smdcntl4 0640 radio radio
/dev/smdcntl5 0640 radio radio
/dev/smdcntl6 0640 radio radio
/dev/smdcntl7 0640 radio radio
/dev/sdioctl0 0640 radio radio
/dev/sdioctl1 0640 radio radio
/dev/sdioctl2 0640 radio radio
/dev/sdioctl3 0640 radio radio
/dev/sdioctl4 0640 radio radio
/dev/sdioctl4 0640 radio radio
/dev/sdioctl5 0640 radio radio
/dev/sdioctl6 0640 radio radio
/dev/sdioctl7 0640 radio radio
/dev/sdioctl8 0640 radio radio
/dev/qemu_trace 0666 system system
/dev/rmnet_ctrl 0640 radio radio
/dev/hsicctl0 0640 radio radio
/dev/hsicctl1 0640 radio radio
/dev/hsicctl2 0640 radio radio
/dev/hsicctl3 0640 radio radio
/dev/gemini0 0660 system camera
/dev/mdm 0660 system system
/dev/ttyHSL1 0660 system system
/dev/tty_sdio_00 0660 system system
/dev/block/mmcblk0 0440 system system

#permissions for video
/dev/msm_vidc_reg 0660 system audio
/dev/msm_vidc_dec 0660 system audio
/dev/msm_vidc_dec_sec 0660 system audio
/dev/msm_vidc_enc 0660 system audio
#permissions for audio
/dev/msm_audio_dev_ctrl 0660 system audio
/dev/msm_amrnb 0660 system audio
/dev/msm_amrwb 0660 system audio
/dev/msm_aac 0660 system audio
/dev/msm_multi_aac 0660 system audio
/dev/msm_aac_in 0660 system audio
/dev/msm_qcelp 0660 system audio
/dev/msm_evrc 0660 system audio
/dev/msm_fm 0660 system audio
/dev/msm_acdb 0660 system audio
/dev/msm_rtac 0660 system audio
/dev/msm_wma 0660 system audio
/dev/msm_wmapro 0660 system audio
/dev/msm_qcelp_in 0660 system audio
/dev/msm_evrc_in 0660 system audio
/dev/msm_preproc_ctl 0660 system audio
/dev/msm_a2dp_in 0640 system audio
/dev/msm_amrnb_in 0640 system audio

/dev/cpu_dma_latency 0660 system system

/dev/rmnet_mux_ctrl 0640 radio radio

#permissions for sensors
/dev/msm_dsps 0660 system system
### end from CAF

/dev/oncrpc/* 0660 root system
/dev/oncrpc/30000017:* 0660 radio radio
/dev/oncrpc/30000000:* 0660 radio radio
/dev/oncrpc/30000016:* 0660 radio radio
/dev/oncrpc/3000003c:* 0660 radio radio
/dev/oncrpc/30000019:* 0660 radio radio
/dev/oncrpc/3000000e:* 0660 radio radio
/dev/oncrpc/30000012:* 0660 radio radio
/dev/oncrpc/30000003:* 0660 radio radio
/dev/oncrpc/3000001b:* 0660 radio radio
/dev/oncrpc/30eeeeee:* 0660 root system
/dev/oncrpc/3000006b:* 0660 root system

# NFC device permission
/dev/pn544 0600 nfc nfc

# USB device permission
/sys/devices/platform/msm_hsusb_host.0/usb* uevent 0660 root usb

# Gyroscope device permission
/dev/mpu 0600 system system
/dev/mpuirq 0600 system system
/dev/timerirq 0600 system system

# Accelerometer device permission
/sys/devices/virtual/input/input* bma250_rate 0640 system system