"exit" will always exit, the number is the result code returned by the script from which you exited. An exit code of zero conventionally means "no error", any other number is treated as an error. This doesn't really matter if you are simply ignoring the exit code; but returning a meaningful exit code is useful so that you can use the script from another script.
Hi friends, :)
In a shell script i found the following if condition.
echo -n "Which version of $1 do you want to restore ('0' to quit)? : "
read desired
if ${desired:=1} -ge $index ] ; then
echo "$0: Restore canceled by user: index value too big." >&2
exit 1
fi
Can... (1 Reply)
i have a paramter data_date in which i am passing a string value.i want to find out another paramter file_date from this.the logic is given below
if day of data_date = sunday or monday
then
file_date=data_date-1
else
file_date=data_date-2
i am passing data_date as 20061027.
how can i... (3 Replies)
Hi,
I am trying to execute this command, but is it not working, says "`;' unexpected"
eval $lgrep $SAM_CMD ; if ; then ; echo "No Error" ; fi
What i want is, return the command output, if it is non zero, say "No Error".
Thanks, John. (21 Replies)
Executed the following if conditions .. and got different results .
only (( )) gave correct o/p with all scenarios .
Can anybody please let me know what is the difference between and ] and ((condition)) when used with if condition.
And why each condition gave different result.
1.... (2 Replies)
hi,
I have some problems in my simple script about the redirect echo stdout command inside a condition. Why is the echo command inside the elif still execute in the else command
Here are my simple script
After check on the two diff output the echo stdout redirect is present in two diff... (3 Replies)
HI
My doubt may be basic one but I need to get it clarified..
When i use "if" condition that checks for many AND, OR logical conditions
like
if ]; then
return 0
fi
Even the if condition fails it returns as zero.. Any clue..
But if i add else condition like
if ]; ... (2 Replies)
Hi all
Unix newbie - please be gentle
Am modifying an existing script to error trap a variable with a length of 0
#!/bin/bash
ipfile='/var/data/bin/ipaddress'
] && ipold="$(< "$ipfile" )"
ipnew="$( wget -q -O - checkip.dyndns.org | sed -e 's/.*Current IP Address: //;s/<.*$//' )"
#... (6 Replies)
o/p of my command is given below
My requirement is
if Pnumber is 0 then
stabilization.Build.2013
else
stabilization.PBuild.2013.3 (11 Replies)
Discussion started by: nikhil jain
11 Replies
LEARN ABOUT OSF1
tis_cond_init
tis_cond_init(3) Library Functions Manual tis_cond_init(3)NAME
tis_cond_init - Initializes a condition variable.
LIBRARY
Standard C Library (libc.so, libc.a)
SYNOPSIS
#include <tis.h>
int tis_cond_init(
pthread_cond_t *cond);
STANDARDS
None
PARAMETERS
Address of the condition variable (passed by reference) to be initialized.
DESCRIPTION
This routine initializes a condition variable (cond) with the DECthreads default condition variable attributes.
A condition variable is a synchronization object used in conjunction with a mutex. A mutex controls access to shared data. When threads
are present, a condition variable allows threads to wait for data to enter a defined state.
For more information about actions taken when threads are present, refer to the pthread_cond_init(3) description.
Your program can use the macro PTHREAD_COND_INITIALIZER to initialize statically allocated condition variables to the DECthreads default
condition variable attributes. Static initialization can be used only for a condition variable with storage class extern or static - auto-
matic (stack local) objects must be initialized by calling tis_cond_destroy(3). Use this macro as follows:
pthread_cond_t condition = PTHREAD_COND_INITIALIZER
When statically initialized, a condition variable should not also be initialized using tis_cond_init(3).
RETURN VALUES
If an error condition occurs, the following occurs: The routine returns an integer value indicating the type of error. The condition vari-
able is not initialized. The contents of condition variable cond are undefined.
The possible return values are as follows: Successful completion. The system lacks the necessary resources to initialize another condition
variable, or The system-imposed limit on the total number of condition variables under execution by a single user is exceeded. The imple-
mentation has detected an attempt to reinitialize the object referenced by cond, a previously initialized, but not yet destroyed condition
variable. The value specified by attr is not a valid condition variable. Insufficient memory exists to initialize the condition variable.
ERRORS
None
RELATED INFORMATION
Functions: tis_cond_broadcast(3), tis_cond_destroy(3), tis_cond_signal(3), tis_cond_wait(3)
Manuals: Guide to DECthreads and Programmer's Guide
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tis_cond_init(3)