clnt_spcreateerror - Linux
Overview
clnt_spcreateerror is a command-line tool used to create a Server-Per-Connection (SPC) error service. This service allows RPC applications to handle specific errors within their own processes, providing finer-grained control and customization over error handling.
Syntax
clnt_spcreateerror [options] <transport> <prog> <vers> <proc>
Options/Flags
- -s: Server hostname
- -p: Server port number (default: 0, auto-assigned)
- -t: Transport type (e.g., tcp, udp)
- -u: RPC protocol version (default: 1)
- -R: Request number
- -e: Error number
- -a: Auxiliary string
- -c: Callback function
- -f: Use foreground instead of background mode
- -n: Use non-blocking I/O
Examples
Create a SPC error service for RPC program 1, version 1, procedure 2 with error 5 and auxiliary string "My error":
clnt_spcreateerror -t tcp -p 6000 -R 1 -e 5 -a "My error" 1 1 2
Create a non-blocking SPC error service using foreground mode:
clnt_spcreateerror -t udp -n -f 1 1 2
Common Issues
- Permission denied: Ensure you have proper permissions to create a SPC error service.
- Invalid arguments: Verify that all provided arguments, such as transport type, program, version, and procedure, are valid.
- Service already exists: Avoid creating multiple instances of the same SPC error service.
Integration
clnt_spcreateerror can be combined with other RPC commands and tools to enhance error handling. For example, it can be used with clnt_call to specify error handling callbacks during RPC calls.
Related Commands
- rpcgen: Generates C code for RPC programs
- rpcinfo: Displays information about RPC programs and services
- clnt_call: Invokes RPC procedures on a remote host