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This patch prevents code duplication in vmcp related programs. Some applications such as vmur, vmcp, and lsqeth use z/VM CP commands to query information. Each program uses its own defines and code. Supply a library and common header file to use common code. Signed-off-by: Thomas Richter <tmricht@linux.vnet.ibm.com> Reviewed-by: Hendrik Brueckner <brueckner@linux.vnet.ibm.com> Reviewed-by: Jan Höppner <hoeppner@linux.vnet.ibm.com> Signed-off-by: Jan Höppner <hoeppner@linux.ibm.com>
66 lines
1.4 KiB
C
66 lines
1.4 KiB
C
/**
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* vmcp_example - Example program for vmcp.c
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*
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* Copyright 2018 IBM Corp.
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*
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* s390-tools is free software; you can redistribute it and/or modify
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* it under the terms of the MIT license. See LICENSE for details.
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*/
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//! [code]
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#include <stdio.h>
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#include <stdlib.h>
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#include <err.h>
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#include "lib/vmcp.h"
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/*
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* Demonstrate vmcp() function usage
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*/
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int main(void)
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{
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struct vmcp_parm cp;
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int rc;
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cp.cpcmd = "q osa";
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cp.buffer_size = VMCP_DEFAULT_BUFSZ;
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cp.do_upper = true;
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rc = vmcp(&cp);
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switch (rc) {
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case VMCP_SUCCESS:
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printf("%s\n", cp.response);
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free(cp.response);
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break;
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case VMCP_ERR_OPEN:
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errx(EXIT_FAILURE, "Could not open device %s", VMCP_DEVICE_NODE);
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break;
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case VMCP_ERR_SETBUF:
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errx(EXIT_FAILURE, "Could not set buffer size");
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break;
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case VMCP_ERR_GETCODE:
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errx(EXIT_FAILURE, "Could not query return code");
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break;
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case VMCP_ERR_GETSIZE:
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errx(EXIT_FAILURE, "Could not query response size");
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break;
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case VMCP_ERR_WRITE:
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errx(EXIT_FAILURE, "Could not issue CP command");
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break;
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case VMCP_ERR_READ:
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errx(EXIT_FAILURE, "Could not read CP response");
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break;
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case VMCP_ERR_TOOSMALL:
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free(cp.response);
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printf("Response truncated (requires %u bytes)\n",
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cp.response_size);
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errx(EXIT_FAILURE, "Response buffer (%u bytes) too small",
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cp.buffer_size);
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break;
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}
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return EXIT_SUCCESS;
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}
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//! [code]
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