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remctl_set_ccache(3) [debian man page]

REMCTL_SET_CCACHE(3)					     remctl Library Reference					      REMCTL_SET_CCACHE(3)

NAME

       remctl_set_ccache - Set credential cache for remctl client connections

SYNOPSIS

       #include <remctl.h>

       int remctl_set_ccache(struct remctl *r, const char *ccache);

DESCRIPTION

       remctl_set_ccache() tells the underlying GSS-API library used by the remctl client library to use ccache as the credential cache for
       authentication to a remctl server.  It will affect any subsequent remctl_open() calls on the same struct remctl object (and may have
       broader effects; see below).  ccache is normally a path to a file in the file system that holds Kerberos credentials, but may take other
       values depending on the underlying Kerberos implementation used by GSS-API.

       Calling this function will normally override any KRB5CCNAME environment setting.  If the caller wishes to honor that setting, it should
       either not call this function or check whether that environment variable is set first.

RETURN VALUE

       remctl_set_ccache() returns true on success and false on failure.  On failure, the caller should call remctl_error() to retrieve the error
       message.

       This function will always return failure if the underlying GSS-API implementation against which the remctl client library was compiled does
       not support setting the Kerberos credential cache.  The caller should be prepared for that.  Falling back on setting the KRB5CCNAME
       environment variable is often a reasonable choice.

EXAMPLES

       Here's an example of attempting to use this function to set a ticket cache location and falling back on setting KRB5CCNAME in the
       environment if this function is not supported.

	   struct remctl r;

	   r = remctl_new();
	   if (r != NULL)
	       if (!remctl_set_ccache(r, "/tmp/krb5cc_example"))
		   putenv("KRB5CCNAME=/tmp/krb5cc_example");

       This assumes that any failure is due to lack of support from the underlying library rather than some other cause.

WARNINGS

       Calling this function normally sets the credential cache used by the underlying GSS-API library for every GSS-API operation in the current
       execution context (process or thread), not just for this remctl object or even just for remctl operations.  This function therefore changes
       global execution state and may affect other GSS-API operations done elsewhere in the same process.  This is an inherent limitation in the
       current GSS-API.

SEE ALSO

       remctl_new(3), remctl_open(3), remctl_error(3)

       The current version of the remctl library and complete details of the remctl protocol are available from its web page at
       <http://www.eyrie.org/~eagle/software/remctl/>.

AUTHOR

       Russ Allbery <rra@stanford.edu>

COPYRIGHT AND LICENSE

       Copyright 2011 The Board of Trustees of the Leland Stanford Junior University

       Copying and distribution of this file, with or without modification, are permitted in any medium without royalty provided the copyright
       notice and this notice are preserved.  This file is offered as-is, without any warranty.

3.2								    2012-06-19						      REMCTL_SET_CCACHE(3)

Check Out this Related Man Page

REMCTL_COMMAND(3)					     remctl Library Reference						 REMCTL_COMMAND(3)

NAME

       remctl_command, remctl_commandv - Send a command to a remctl server

SYNOPSIS

       #include <remctl.h>

       int remctl_command(struct remctl *r, const char **command);

       #include <sys/uio.h>

       int remctl_commandv(struct remctl *r, const struct iovec *iov,
			   size_t count);

DESCRIPTION

       remctl_command() and remctl_commandv() send a command to a remote remctl server.  The remctl client object r, created with remctl_new(),
       should have previously been passed to remctl_open() to open a connection to the server.

       remctl_command() takes the command as a NULL-terminated array of NUL-terminated strings (the same layout as an argv array).  This function
       is most convenient when passing simple text commands.

       remctl_commandv() takes the command as an array of iovec structs of length count.  This function is most convenient when passing arbitrary
       data to the command, since the iovec struct takes a pointer and a length for each chunk of data.  See writev(2) for the layout of the iovec
       struct.

       After calling one of these functions, call remctl_output() to get the results of the command.

RETURN VALUE

       remctl_command() and remctl_commandv() return true on success and false on failure.  On failure, the caller should call remctl_error() to
       retrieve the error message.

SEE ALSO

       remctl_new(3), remctl_open(3), remctl_output(3), remctl_error(3)

       The current version of the remctl library and complete details of the remctl protocol are available from its web page at
       <http://www.eyrie.org/~eagle/software/remctl/>.

AUTHOR

       Russ Allbery <rra@stanford.edu>

COPYRIGHT AND LICENSE

       Copyright 2007, 2009 The Board of Trustees of the Leland Stanford Junior University

       Copying and distribution of this file, with or without modification, are permitted in any medium without royalty provided the copyright
       notice and this notice are preserved.  This file is offered as-is, without any warranty.

3.2								    2012-06-19							 REMCTL_COMMAND(3)
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