>
> Is there a /var/www/dev/cuaU2
Indeed this is present. created it before as follows:
www# mkdir /var/www/dev
www# cd /var/www/dev
www# sh /dev/MAKEDEV ttyU2
www# ls
cuaU2 ttyU2
www#
>
On 2/8/19, Edgar Pettijohn <ed...@pettijohn-web.com> wrote:
>
> On Feb 8, 2019 9:01 AM, Kihaguru Gathura <pqscr...@gmail.com> wrote:
>>
>> Hi,
>>
>> What effective way can be used to apply permission to /dev/cuaU2 to
>> avoid the error below.
>>
>>
>> www# chroot -u www /var/www cgi-bin/modem
>
> Is there a /var/www/dev/cuaU2
>
>> Status: 200 OK
>> Content-type: text/html
>>
>> cu: open("/dev/cuaU2"): Permission denied
>>
>> Note: chown www:daemon /dev/cuaU2 has not worked. chroot is in the
>> root folder which allows devices.
>>
>> /dev/sd0a (87d0b25f285b037a.a) on /mnt type ffs (rw,
>> asynchronous, local)
>> /dev/sd0e (87d0b25f285b037a.e) on /mnt/home type ffs (rw,
>> asynchronous, local, nodev, nosuid)
>> /dev/sd0d (87d0b25f285b037a.d) on /mnt/usr type ffs (rw,
>> asynchronous, local, nodev)
>>
>>
>>
>> # dmesg
>> OpenBSD 6.4-current (GENERIC.MP) #253: Sun Nov 4 23:26:31 MST 2018
>> dera...@arm64.openbsd.org:/usr/src/sys/arch/arm64/compile/GENERIC.MP
>> real mem = 961421312 (916MB)
>> avail mem = 902914048 (861MB)
>> mainbus0 at root: Raspberry Pi 3 Model B Rev 1.2
>> cpu0 at mainbus0 mpidr 0: ARM Cortex-A53 r0p4
>> cpu0: 32KB 64b/line 2-way L1 VIPT I-cache, 32KB 64b/line 4-way L1 D-cache
>> cpu0: 512KB 64b/line 16-way L2 cache
>> efi0 at mainbus0: UEFI 2.7
>> efi0: Das U-Boot rev 0x20180900
>> simplefb0 at mainbus0: 656x416, 32bpp
>> wsdisplay0 at simplefb0 mux 1
>> wsdisplay0: screen 0-5 added (std, vt100 emulation)
>> simplebus0 at mainbus0: "soc"
>> bcmintc0 at simplebus0
>> bcmdog0 at simplebus0
>> bcmrng0 at simplebus0
>> pluart0 at simplebus0
>> bcmtemp0 at simplebus0
>> bcmaux0 at simplebus0
>> com0 at simplebus0: ns16550, no working fifo
>> com0: console
>> dwctwo0 at simplebus0
>> simplebus1 at mainbus0: "clocks"
>> agtimer0 at mainbus0: tick rate 19200 KHz
>> cpu1 at mainbus0 mpidr 1: ARM Cortex-A53 r0p4
>> cpu1: 32KB 64b/line 2-way L1 VIPT I-cache, 32KB 64b/line 4-way L1 D-cache
>> cpu1: 512KB 64b/line 16-way L2 cache
>> cpu2 at mainbus0 mpidr 2: ARM Cortex-A53 r0p4
>> cpu2: 32KB 64b/line 2-way L1 VIPT I-cache, 32KB 64b/line 4-way L1 D-cache
>> cpu2: 512KB 64b/line 16-way L2 cache
>> cpu3 at mainbus0 mpidr 3: ARM Cortex-A53 r0p4
>> cpu3: 32KB 64b/line 2-way L1 VIPT I-cache, 32KB 64b/line 4-way L1 D-cache
>> cpu3: 512KB 64b/line 16-way L2 cache
>> usb0 at dwctwo0: USB revision 2.0
>> uhub0 at usb0 configuration 1 interface 0 "Broadcom DWC2 root hub" rev
>> 2.00/1.00 addr 1
>> uhub1 at uhub0 port 1 configuration 1 interface 0 "Standard
>> Microsystems product 0x9514" rev 2.00/2.00 addr 2
>> smsc0 at uhub1 port 1 configuration 1 interface 0 "Standard
>> Microsystems SMSC9512/14" rev 2.00/2.00 addr 3
>> smsc0: address b8:27:eb:fd:e2:73
>> ukphy0 at smsc0 phy 1: Generic IEEE 802.3u media interface, rev. 3:
>> OUI 0x0001f0, model 0x000c
>> umass0 at uhub1 port 3 configuration 1 interface 0 "HP v222w" rev
>> 2.00/11.00 addr 4
>> umass0: using SCSI over Bulk-Only
>> scsibus0 at umass0: 2 targets, initiator 0
>> sd0 at scsibus0 targ 1 lun 0: <hp, v222w, 1100> SCSI2 0/direct
>> removable serial.03f03f40AA0000000444
>> sd0: 7680MB, 512 bytes/sector, 15728640 sectors
>> vscsi0 at root
>> scsibus1 at vscsi0: 256 targets
>> softraid0 at root
>> scsibus2 at softraid0: 256 targets
>> bootfile: sd0a:/bsd
>> boot device: sd0
>> root on sd0a (87d0b25f285b037a.a) swap on sd0b dump on sd0b
>> WARNING: CHECK AND RESET THE DATE!
>> umsm0 at uhub1 port 5 configuration 1 interface 0 "HUAWEI HUAWEI
>> Mobile" rev 2.00/1.02 addr 5
>> umsm1 at uhub1 port 5 configuration 1 interface 1 "HUAWEI HUAWEI
>> Mobile" rev 2.00/1.02 addr 5
>> umsm0 detached
>> umsm1 detached
>> umsm0 at uhub1 port 5 configuration 1 interface 0 "HUAWEI HUAWEI
>> Mobile" rev 2.00/1.02 addr 5
>> ucom0 at umsm0
>> umsm1 at uhub1 port 5 configuration 1 interface 1 "HUAWEI HUAWEI
>> Mobile" rev 2.00/1.02 addr 5
>> ucom1 at umsm1
>> umsm2 at uhub1 port 5 configuration 1 interface 2 "HUAWEI HUAWEI
>> Mobile" rev 2.00/1.02 addr 5
>> ucom2 at umsm2
>> umass1 at uhub1 port 5 configuration 1 interface 3 "HUAWEI HUAWEI
>> Mobile" rev 2.00/1.02 addr 5
>> umass1: using SCSI over Bulk-Only
>> scsibus3 at umass1: 2 targets, initiator 0
>> cd0 at scsibus3 targ 1 lun 0: <HUAWEI, Mass Storage, 2.31> SCSI2
>> 5/cdrom removable
>> uid 503 on /: file system full
>> uid 503 on /: file system full
>> uid 503 on /: file system full
>> uid 503 on /: file system full
>> uid 503 on /: file system full
>> uid 503 on /: file system full
>> uid 503 on /: file system full
>> uid 503 on /: file system full
>> uid 503 on /: file system full
>> uid 503 on /: file system full
>> uid 503 on /: file system full
>> coredump of postgres(24493) failed, filesystem full
>> uid 503 on /: file system full
>> uid 503 on /: file system full
>> ucom0 detached
>> umsm0 detached
>> ucom1 detached
>> umsm1 detached
>> ucom2 detached
>> umsm2 detached
>> cd0 detached
>> scsibus3 detached
>> umass1 detached
>> sd1 detached
>> scsibus4 detached
>> umass2 detached
>> umsm0 at uhub1 port 2 configuration 1 interface 0 "HUAWEI HUAWEI
>> Mobile" rev 2.00/1.02 addr 5
>> umsm1 at uhub1 port 2 configuration 1 interface 1 "HUAWEI HUAWEI
>> Mobile" rev 2.00/1.02 addr 5
>> umsm0 detached
>> umsm1 detached
>> umsm0 at uhub1 port 2 configuration 1 interface 0 "HUAWEI HUAWEI
>> Mobile" rev 2.00/1.02 addr 5
>> ucom0 at umsm0
>> umsm1 at uhub1 port 2 configuration 1 interface 1 "HUAWEI HUAWEI
>> Mobile" rev 2.00/1.02 addr 5
>> ucom1 at umsm1
>> umsm2 at uhub1 port 2 configuration 1 interface 2 "HUAWEI HUAWEI
>> Mobile" rev 2.00/1.02 addr 5
>> ucom2 at umsm2
>> umass1 at uhub1 port 2 configuration 1 interface 3 "HUAWEI HUAWEI
>> Mobile" rev 2.00/1.02 addr 5
>> umass1: using SCSI over Bulk-Only
>> scsibus3 at umass1: 2 targets, initiator 0
>> cd0 at scsibus3 targ 1 lun 0: <HUAWEI, Mass Storage, 2.31> SCSI2
>> 5/cdrom removable
>> umass2 at uhub1 port 2 configuration 1 interface 4 "HUAWEI HUAWEI
>> Mobile" rev 2.00/1.02 addr 5
>> umass2: using SCSI over Bulk-Only
>> scsibus4 at umass2: 2 targets, initiator 0
>> sd1 at scsibus4 targ 1 lun 0: <HUAWEI, SD Storage, 2.31> SCSI2
>> 0/direct removable
>> ucom0 detached
>> umsm0 detached
>> ucom1 detached
>> umsm1 detached
>> ucom2 detached
>> umsm2 detached
>> cd0 detached
>> scsibus3 detached
>> umass1 detached
>> sd1 detached
>> scsibus4 detached
>> umass2 detached
>> umsm0 at uhub1 port 2 configuration 1 interface 0 "HUAWEI HUAWEI
>> Mobile" rev 2.00/1.02 addr 5
>> umsm1 at uhub1 port 2 configuration 1 interface 1 "HUAWEI HUAWEI
>> Mobile" rev 2.00/1.02 addr 5
>> umsm0 detached
>> umsm1 detached
>> umsm0 at uhub1 port 2 configuration 1 interface 0 "HUAWEI HUAWEI
>> Mobile" rev 2.00/1.02 addr 5
>> ucom0 at umsm0
>> umsm1 at uhub1 port 2 configuration 1 interface 1 "HUAWEI HUAWEI
>> Mobile" rev 2.00/1.02 addr 5
>> ucom1 at umsm1
>> umsm2 at uhub1 port 2 configuration 1 interface 2 "HUAWEI HUAWEI
>> Mobile" rev 2.00/1.02 addr 5
>> ucom2 at umsm2
>> umass1 at uhub1 port 2 configuration 1 interface 3 "HUAWEI HUAWEI
>> Mobile" rev 2.00/1.02 addr 5
>> umass1: using SCSI over Bulk-Only
>> scsibus3 at umass1: 2 targets, initiator 0
>> cd0 at scsibus3 targ 1 lun 0: <HUAWEI, Mass Storage, 2.31> SCSI2
>> 5/cdrom removable
>> umass2 at uhub1 port 2 configuration 1 interface 4 "HUAWEI HUAWEI
>> Mobile" rev 2.00/1.02 addr 5scsibus4 at umass2: 2 targets, initiator 0
>> sd1 at scsibus4 targ 1 lun 0: <HUAWEI, SD Storage, 2.31> SCSI2
>> 0/direct removable
>> ucom0 detached
>> umsm0 detached
>> ucom1 detached
>> umsm1 detached
>> ucom2 detached
>> umsm2 detached
>> cd0 detached
>> scsibus3 detached
>> umass1 detached
>> sd1 detached
>> scsibus4 detached
>> umass2 detached
>> umsm0 at uhub1 port 2 configuration 1 interface 0 "HUAWEI HUAWEI
>> Mobile" rev 2.00/1.02 addr 5
>> umsm1 at uhub1 port 2 configuration 1 interface 1 "HUAWEI HUAWEI
>> Mobile" rev 2.00/1.02 addr 5
>> umsm0 detached
>> umsm1 detached
>> umsm0 at uhub1 port 2 configuration 1 interface 0 "HUAWEI HUAWEI
>> Mobile" rev 2.00/1.02 addr 5
>> ucom0 at umsm0
>> umsm1 at uhub1 port 2 configuration 1 interface 1 "HUAWEI HUAWEI
>> Mobile" rev 2.00/1.02 addr 5
>> ucom1 at umsm1
>> umsm2 at uhub1 port 2 configuration 1 interface 2 "HUAWEI HUAWEI
>> Mobile" rev 2.00/1.02 addr 5
>> ucom2 at umsm2
>> umass1 at uhub1 port 2 configuration 1 interface 3 "HUAWEI HUAWEI
>> Mobile" rev 2.00/1.02 addr 5
>> umass1: using SCSI over Bulk-Only
>> scsibus3 at umass1: 2 targets, initiator 0
>> cd0 at scsibus3 targ 1 lun 0: <HUAWEI, Mass Storage, 2.31> SCSI2
>> 5/cdrom removable
>> umass2 at uhub1 port 2 configuration 1 interface 4 "HUAWEI HUAWEI
>> Mobile" rev 2.00/1.02 addr 5
>> umass2: using SCSI over Bulk-Only
>> scsibus4 at umass2: 2 targets, initiator 0
>> sd1 at scsibus4 targ 1 lun 0: <HUAWEI, SD Storage, 2.31> SCSI2
>> 0/direct removable
>>
>> Thanks,
>>
>> Kihaguru.
>>
>> On 9/11/18, Kihaguru Gathura <pqscr...@gmail.com> wrote:
>> > Hi,
>> >
>> > I am able to send SMS using AT commands and C outside chroot using
>> > code spinet below
>> >
>> > -------------------------------------------------------------------
>> > #include <stdio.h>
>> > #include <time.h>
>> > #include <unistd.h>
>> >
>> > #define MODEM_PATH "cu -l /dev/cuaU0 -s 115200"
>> >
>> > int main()
>> > {
>> > FILE *out;
>> > char s[40];
>> >
>> > printf("Content-type: text/html\n\n");
>> >
>> > snprintf(s, sizeof(s), "%s", MODEM_PATH);
>> > ~
>> > ~
>> > ~
>> > ~
>> > ~
>> > ~
>> > return(0);
>> > }
>> > --------------------------------------------------------------------
>> >
>> > however, running the program from within chroot, I get the message
>> >
>> > /dev/cuaU0 - No such file or directory
>> >
>> > All files needed by cu are properly copied to chroot and cu works fine.
>> >
>> > Question:
>> >
>> > 1: How do i get /dev/cuaU0 device accessible under chroot?
>> >
>> > 2: Is there a better i.e more secure approach to access modem from
>> > within chroot?
>> >
>>
>
