03-03-2010
if, sed or awk with conditions
I do not know how to do this unless I use a bunch of if statements. I need a script to replace numbers in each record in a file. I am really getting tangled in this web.
If a fieldA (19 positions) is greater than 14 digits, I have to change the data (resulting fieldA is fixed 19 postions).
If there are preceding zeros. For example:
'000123456789012 ' would be changed to '123456789012 '
'001234567890123 ' would be changed to 1234567890123 '
'012345678901234 ' would be changed to 12345678901234 '
'123456789012345 ' would not be changed but would report error
I would appreciate any help or direction. Thanks.
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LEARN ABOUT HPUX
pthread_sigmask
pthread_sigmask(3T) pthread_sigmask(3T)
NAME
pthread_sigmask() - examine/change signal mask of calling thread
SYNOPSIS
PARAMETERS
how This parameter defines how the signal mask of the calling thread will be changed.
set Pointer to the set of signals that will be used to change the currently blocked signal set.
oset Pointer to where the previous signal mask will be returned.
DESCRIPTION
allows the calling thread to examine and/or change its signal mask.
Unless it is a null pointer, the argument set points to a set of signals which are to be used to change the currently blocked signal set.
The argument how indicates how the set is changed. The legal values are:
The resulting set is the union of the current set and the signal
set pointed to by set.
The resulting set is the intersection of the current set
and the complement of the signal set pointed to by set.
The resulting set is the signal set pointed to by
set.
If the argument oset is not a null pointer, the previous signal mask is returned in oset. If set is a null pointer, the value of the argu-
ment how is insignificant and the thread's signal mask is unchanged; thus, the call can be used to inquire about currently blocked signals.
If there any pending unblocked signals after the call to at least one of those signals is delivered before the call to returns.
It is impossible to block the or signal. This is enforced by the system without causing an error to be indicated.
The thread's signal mask is not changed if fails for any reason.
RETURN VALUE
Upon successful completion, returns zero. Otherwise, an error number is returned to indicate the error (the variable is not set).
ERRORS
If any of the following occur, the function returns the corresponding error number:
how contains an invalid value.
set or oset points to an invalid address. The reliable detection of this error is implementation dependent.
AUTHOR
was derived from the IEEE POSIX P1003.1c standard.
SEE ALSO
sigprocmask(2).
STANDARDS CONFORMANCE
Pthread Library pthread_sigmask(3T)