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.TH pbs_alterjob 3B "3 March 2015" Local "PBS Professional"
.SH NAME
pbs_alterjob - alter PBS batch job
.SH SYNOPSIS
#include <pbs_error.h>
.br
#include <pbs_ifl.h>
.sp
.B "int pbs_alterjob(\^int connect, char\ *job_id, struct\ attrl\ *attrib, char\ *extend\^)"

.SH DESCRIPTION
Issue a batch request to alter a batch job.
.LP
A
.I "Modify Job"
batch request is generated and sent to the server over the connection
specified by
.I connect 
which is the return value of \f3pbs_connect\f1().
.LP 
The argument,
.I job_id ,
identifies which job is to be altered.  It is specified in the form:
.br
.RS 4
.I sequence_number.server
.RE
.LP
The parameter,
.I attrib ,
is a pointer to an
.I attrl
structure which is defined in pbs_ifl.h as:
.sp
.Ty
.nf
    struct attrl {
        char *name;
        char *resource;
        char *value
        struct attrl *next;
    };
.fi
The 
.I attrib
list is terminated by the first entry where
.I next
is a null pointer.
.LP
The
.I name
member points to a string which is the name of the attribute.  The
.I value
member points to a string which is the value of the attribute.
The attribute names are defined in pbs_ifl.h.
.br

.LP
If
.I attrib
itself is a null pointer, then no attributes are altered.
.LP
Associated with an attribute of type ATTR_l (the letter ell)
is a resource name indicated by
.I resource 
in the
.I attrl
structure.
All other attribute types should have a pointer to a null string ("") for
.I resource .
.LP
If the resource of the specified resource name is already present in the job's
.I Resource_List
attribute, it will be altered to the specified value.  If the resource
is not present in the attribute, it is added.
.LP
Certain attributes of a job may or may not be alterable depending on
the state of the job;  see \f3qalter\f1(1B).
.sp
.LP
The parameter,
.I extend ,
is reserved for implementation-defined extensions.
.SH "SEE ALSO"
qalter(1B), qhold(1B), qrls(1B), qsub(1B), pbs_connect(3B), pbs_holdjob(3B),
and pbs_rlsjob(3B)
.SH DIAGNOSTICS
When the batch request generated by \f3pbs_alterjob\f1()
function has been completed successfully by a batch server, the routine will
return 0 (zero).
Otherwise, a non zero error is returned.  The error number is also set
in pbs_errno.