There is no tty, no /dev/tty, no controlling terminal. You can create one in several ways, like ssh -tt and expect, but usually one does not want terminal output from a cron job.
You have to build the environment manually, and if you were not careful writing your ~/.profile, it may want a tty. Without the usual PATH, LD_LIBRARY_PATH, etc. many apps fail.
Execuatble scripts should be set up according to man exec to run under the right interpreter. Cron will call scripts using sh, and if you lack exec permissions or first line is not:
then you are in trouble.
I often test run cron script lines using something like:
(no terminal, called from sh).
Hello,
I'm stuck and confused as to why when I execute things form the command line it works but when in a script it doesn't.
My script:
### creating a lock on the console
touch /var/run/console.lock
chmod 600 /var/run/console.lock
echo "$User" >>... (2 Replies)
Howdie everyone...
I have a shell script RemoveFiles.sh
Inside this file, it only has two commands as below:
rm -f ../../reportToday/temp/*
rm -f ../../report/*
My problem is that when i execute this script, nothing happened. Files remained unremoved. I don't see any error message as it... (2 Replies)
Hey there, I'm a total newbie unix guy here and just picking this stuff up. Have a very small script I put together that works fine from the command line but not once I put it in a cron job. Searched and found this thread and am wondering it it has something to do with setting variables, though the... (7 Replies)
I have a script which runs fine through command line, but doesn't run through cron. There are some variables which are set by the .profile file which are used by the script. Is it that cront does not pick these variables.
$/export/home/rahul/bin/createfile.sh >>... (3 Replies)
Hi, I'm new to these forums, and I'm hoping that someone can solve this problem...
To make things short:
I have DD-wrt set up on a router.
I'm trying to run a script in CRON that fetches the daily password from my database using SSH.
CRON is set like so(in web interface):
* * * *... (4 Replies)
Hi all,
I have a script that can be run via cron or via the command line.
Is there any way that I can place something on the script to be able to distinguish/differentiate whether the script was run via a user in the command line or whether it was run from the cron? (3 Replies)
In my cron thare is a line like
24 11 * * * /usr/batch/bin/abc.sh > /usr/batch/log/abc.log 2>&1
along with other entries. I want to comment out this line through a shell script. My local variable 'line'ontains the full entry (i.e. 24 11 * * * /usr/batch/bin/abc.sh > /usr/batch/log/abc.log... (4 Replies)
Hi, I have a script that seems to run to completion when in the command-line, but when it is run using the cron, it seems to time out.
They both start and run fine, but on the CRON it stops prematurely.
The script hits an API every few seconds and grabs data.
Does anyone have any idea on... (4 Replies)
Hi
I have a text file (Input.txt) with two column entries separated by tab as given below:
aaa str1
bbb str2
cccccc str3
dddd str4
eee str3
ssss str2
sdf str3
hhh str1
fff str2
ccc str3
.....
.....
..... (1 Reply)
0
I have a script(main.sh) which calls another script(Get_Files.sh) and gets a value in a variable like the below:
File_to_Refresh="$(sh /Aug/work/Get_Files.sh /Aug/Work/Universal_File.txt)"
Now I have to schedule the script main.sh for 3 different files i.e. the Universal_File.txt with 3... (2 Replies)
Discussion started by: bhartiya007
2 Replies
LEARN ABOUT SUNOS
tty
tty(1) User Commands tty(1)NAME
tty - return user's terminal name
SYNOPSIS
tty [-l] [-s]
DESCRIPTION
The tty utility writes to the standard output the name of the terminal that is open as standard input. The name that is used is equivalent
to the string that would be returned by the ttyname(3C) function.
OPTIONS
The following options are supported:
-l Prints the synchronous line number to which the user's terminal is connected, if it is on an active synchronous line.
-s Inhibits printing of the terminal path name, allowing one to test just the exit status.
ENVIRONMENT VARIABLES
See environ(5) for descriptions of the following environment variables that affect the execution of tty: LANG, LC_ALL, LC_CTYPE, LC_MES-
SAGES, and NLSPATH.
EXIT STATUS
The following exit values are returned:
0 Standard input is a terminal.
1 Standard input is not a terminal.
>1 An error occurred.
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Availability |SUNWcsu |
+-----------------------------+-----------------------------+
|CSI |enabled |
+-----------------------------+-----------------------------+
|Interface Stability |Standard |
+-----------------------------+-----------------------------+
SEE ALSO isatty(3C), ttyname(3C), attributes(5), environ(5), standards(5)DIAGNOSTICS
not on an active synchronous line
The standard input is not a synchronous terminal and -l is specified.
not a tty
The standard input is not a terminal and -s is not specified.
NOTES
The -s option is useful only if the exit status is wanted. It does not rely on the ability to form a valid path name. Portable applications
should use test -t.
SunOS 5.10 1 Feb 1995 tty(1)