Hi,
at/batch(1) appears to not retain SSH_AUTH_SOCK and SSH_AGENT_PID
environment variables when commands are executed. According to the man
page:
"(...) The working directory, the environment (except for the variables
TERM, TERMCAP, DISPLAY, and _), and the umask are retained from the
time of invocation. An at or batch command invoked from a su(1) shell
will retain the current user ID."
Why are those variables not preserved?
My use case is an automated backup to a remote server with ssh public
key authentication (passphrased). Since cron + ssh-agent needs some
kind of workaround (e.g. predetermined socket location, Keychain etc.),
I intend to run the backup script with batch from ~/.xsession after
ssh-agent was started by default in /etc/X11/xenodm/Xsession. The
machine is not running continuously.
Example:
$ env
_=/usr/bin/env
LOGNAME=erwin
WINDOWPATH=ttyC4
WINDOWID=12582925
XTERM_SHELL=/bin/ksh
JAVA_HOME=/usr/local/jdk-1.7.0/
HOME=/home/erwin
LC_CTYPE=en_US.UTF-8
VISUAL=/usr/bin/mg
XTERM_VERSION=XTerm/OpenBSD(330)
DISPLAY=:0
SSH_AGENT_PID=73270
HOSTNAME=pc0.erwingeerdink.com
EDITOR=/usr/bin/mg
ENV=/home/erwin/.kshrc
PATH=/home/erwin/bin:/bin:/sbin:/usr/bin:/usr/sbin:/usr/X11R6/bin:/usr/local/bin:/usr/local/sbin:/usr/games:.
SSH_AUTH_SOCK=/tmp/ssh-MmReEdpAhc7D/agent.15964
PAGER=less
TERM=xterm
SHELL=/bin/ksh
USER=erwin
XTERM_LOCALE=en_US.UTF-8
$ echo 'env' | at now
commands will be executed using /bin/ksh
job 1517394411.c at Wed Jan 31 11:26:51 2018
$ doas cat /var/cron/log | fgrep '1517394411.c'
doas (er...@pc0.erwingeerdink.com) password:
Jan 31 11:26:51 pc0 at[16305]: (erwin) CREATE (1517394411.c)
Jan 31 11:26:51 pc0 cron[27096]: (erwin) ATJOB (1517394411.c)
$ cat /var/mail/erwin
(...)
Your "at" job on pc0.erwingeerdink.com
"/var/cron/atjobs/1517394411.c"
produced the following output:
_=/usr/bin/env
LOGNAME=erwin
WINDOWPATH=ttyC4
WINDOWID=12582925
XTERM_SHELL=/bin/ksh
HOME=/home/erwin
JAVA_HOME=/usr/local/jdk-1.7.0/
LC_CTYPE=en_US.UTF-8
VISUAL=/usr/bin/mg
XTERM_VERSION=XTerm/OpenBSD(330)
HOSTNAME=pc0.erwingeerdink.com
EDITOR=/usr/bin/mg
ENV=/home/erwin/.kshrc
PATH=/home/erwin/bin:/bin:/sbin:/usr/bin:/usr/sbin:/usr/X11R6/bin:/usr/local/bin:/usr/local/sbin:/usr/games:.
PAGER=less
XTERM_LOCALE=en_US.UTF-8
USER=erwin
$
dmesg:
OpenBSD 6.2 (GENERIC.MP) #2: Sun Dec 10 21:14:42 CET 2017
r...@syspatch-62-amd64.openbsd.org:/usr/src/sys/arch/amd64/compile/GENERIC.MP
real mem = 8034123776 (7661MB)
avail mem = 7783612416 (7423MB)
mpath0 at root
scsibus0 at mpath0: 256 targets
mainbus0 at root
bios0 at mainbus0: SMBIOS rev. 2.4 @ 0xf0100 (53 entries)
bios0: vendor Award Software International, Inc. version "F4" date
10/19/2012 bios0: Gigabyte Technology Co., Ltd. GA-78LMT-USB3
acpi0 at bios0: rev 0
acpi0: sleep states S0 S3 S4 S5
acpi0: tables DSDT FACP MSDM HPET MCFG TAMG APIC SSDT
acpi0: wakeup devices USB0(S3) USB1(S3) USB2(S3) USB3(S3) USB4(S3) USB5
(S3) USB6(S3) SBAZ(S4) P2P_(S5) PCE2(S4) PCE3(S4) PCE4(S4) PCE5(S4) PCE6
(S4) PCE7(S4) PCE9(S4) [...] acpitimer0 at acpi0: 3579545 Hz, 32 bits
acpihpet0 at acpi0: 14318180 Hz acpimcfg0 at acpi0 addr 0xe000, bus
0-255 acpimadt0 at acpi0 addr 0xfee0: PC-AT compat
cpu0 at mainbus0: apid 0 (boot processor)
cpu0: AMD FX(tm)-8320 Eight-Core Processor, 33398.65 MHz
cpu0:
FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,MMX,FXSR,SSE,SSE2,HTT,SSE3,PCLMUL,MWAIT,SSSE3,FMA3,CX16,SSE4.1,SSE4.2,POPCNT,AES,XSAVE,AVX,F16C,NXE,MMXX,FFXSR,PAGE1GB,RDTSCP,LONG,LAHF,CMPLEG,SVM,EAPICSP,AMCR8,ABM,SSE4A,MASSE,3DNOWP,OSVW,IBS,XOP,SKINIT,WDT,FMA4,NODEID,TBM,TOPEXT,ITSC,BMI1
cpu0: 64KB 64b/line 2-way I-cache, 16KB 64b/line 4-way D-cache, 2MB
64b/line 16-way L2 cache, 8MB 64b/line 64-way L3 cache cpu0: ITLB 48
4KB entries fully associative, 24 4MB entries fully associative cpu0:
DTLB 64 4KB entries fully associative, 64 4MB entries fully associative
cpu0: TSC frequency 33398645960 Hz cpu0: smt 0, core 0, package 0 mtrr:
Pentium Pro MTRR support, 8 var ranges, 88 fixed ranges cpu0: apic
clock running at 200MHz cpu0: mwait min=64, max=64, IBE
cpu1 at mainbus0: apid 1 (application processor)
cpu1: AMD FX(tm)-8320 Eight-Core Processor, 3515.55 MHz
cpu1:
FPU,VME,DE,PSE,TSC,MSR,PAE,MCE,CX8,APIC,SEP,MTRR,PGE,MCA,CMOV,PAT,PSE36,CFLUSH,MMX,FXSR,SSE,SSE2,HTT,SSE3,PCLMUL,MWAIT,SSSE3,FMA3,CX16,SSE4.1,SSE4.2,POPCNT,AES,XSAVE,AVX,F16C,NXE,MMXX,FFXSR,PAGE1GB,RDTSCP,LONG,LAHF,CMPLEG,SVM,EAPICSP,AMCR8,ABM,SSE4A,MASSE,3DNOWP,OSVW,IBS,XOP,SKINIT,WDT,FMA4,NODEID,TBM,TOPEXT,ITSC,BMI1
cpu1: 64KB 64b/line 2-way I-cache, 16KB 64b/line 4-way D-cache, 2MB
64b/line 16-way L2 cache, 8MB 64b/line 64-way L3 cache cpu1: ITLB 48
4KB entries fully associative, 24 4MB entries fully associative cpu1:
DTLB 64 4KB entries fully associative, 64 4MB entries fully associative
cpu1: smt 0, core 3, package 0 cpu2 at mainbus0: apid 2 (application
processor) cpu2: AMD FX(tm)-8320 Eight-Core Processor, 3515.55 MHz
cpu2:
