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Environment Variables Across DOS Sessions
Keywords: DOS environment variables
Question:
I am having problems with enviroment varibles. I am creating a winbatch file to run during our NT logonscipts which works fine. The program is doing a ping and redirecting the output to a file and parsing out the "time=" part to see how fast of a connection you have. If the connection is over 50ms I would like to set an enviroment varible for the loginscript to read and exit the the loginscript so it doesn't try to load the SMS. The problem I have is when I set the enviroment varible it doesn't stay set in the logonscript DOS window. Here is my code:
RunWait("cmd.exe","/c ping -n 1 Eueud034226 >c:\pt.txt")
handle = FileOpen("c:\pt.txt","READ")
while @TRUE
x = FileRead(handle)
if x == "*EOF*"
Break
endif
start=0
ptime=strIndexNC(x, "time=", start, @FWDSCAN)
If ptime == 0
;I will put code here later
else
a=StrSub(x, ptime, 11)
b=StrTrim(a)
ns=strindexnc(b, "time=", 0, @FWDSCAN)
ne=strindexnc(b, "ms", 0, @FWDSCAN)
sl=StrLen(b)
pn=strsub(b, ns+5, -1)
pn2=strsub(pn, 1, strlen(pn)-2)
If pn2 > 50
Runwait("c:\s.bat", 2)
endif
endif
endwhile
I am sure this can be done my brain is just not working right.
Answer:
The environment variables are difficult to move across DOS sessions like that. Mostly the various DOS bat files get a copy of the environment when they start up. It need to be set by then.I recommend a flag file.
C:\NORUNSMS.TXTIf you want to squelch SMS, just create the file, otherwise make sure it is deleted.
THen in your LOGIN.BAT file you can do an:
IF EXIST C:\NORUNSMS goto SKIPSMSor something like that.
The environment variable does not persist across those DOS sessions.
Article ID: W14585
Filename: Environment Variables Across DOS Sessions.txt
File Created: 2000:07:28:14:27:42
Last Updated: 2000:07:28:14:27:42