mirror of
https://github.com/xen-project/xen.git
synced 2026-10-28 02:01:24 +01:00
Juergen Gross
5b18843067
In order to better reflect the contents of the header and to make it more appropriate to use it for different runtime environments like programs, libraries, and firmware, rename the libs.h include file to common-macros.h. Additionally add a comment pointing out the need to be self-contained. Suggested-by: Andrew Cooper <andrew.cooper3@citrix.com> Signed-off-by: Juergen Gross <jgross@suse.com> Acked-by: Marek Marczykowski-Górecki <marmarek@invisiblethingslab.com> # tools/python/xen/lowlevel/xc/xc.c Acked-by: Christian Lindig <christian.lindig@cloud.com> Acked-by: Anthony PERARD <anthony.perard@citrix.com> Acked-by: Jan Beulich <jbeulich@suse.com>
128 lines
2.7 KiB
C
128 lines
2.7 KiB
C
/*
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* Copyright (c) 2017 Oracle and/or its affiliates. All rights reserved.
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*/
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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 <errno.h>
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#include <unistd.h>
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#include <string.h>
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#include <xenctrl.h>
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#include <xen/errno.h>
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#include <xen-tools/common-macros.h>
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static xc_interface *xch;
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void show_help(void)
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{
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fprintf(stderr,
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"xen-diag: xen diagnostic utility\n"
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"Usage: xen-diag command [args]\n"
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"Commands:\n"
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" help display this help\n"
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" gnttab_query_size <domid> dump the current and max grant frames for <domid>\n");
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}
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/* wrapper function */
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static int help_func(int argc, char *argv[])
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{
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show_help();
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return 0;
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}
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static int gnttab_query_size_func(int argc, char *argv[])
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{
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int domid, rc = 1;
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struct gnttab_query_size query;
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if ( argc != 1 )
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{
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show_help();
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return rc;
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}
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domid = strtol(argv[0], NULL, 10);
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query.dom = domid;
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rc = xc_gnttab_query_size(xch, &query);
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if ( rc == 0 && (query.status == GNTST_okay) )
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printf("domid=%d: nr_frames=%d, max_nr_frames=%d\n",
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query.dom, query.nr_frames, query.max_nr_frames);
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return rc == 0 && (query.status == GNTST_okay) ? 0 : 1;
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}
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struct {
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const char *name;
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int (*function)(int argc, char *argv[]);
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} main_options[] = {
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{ "help", help_func },
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{ "gnttab_query_size", gnttab_query_size_func},
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};
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int main(int argc, char *argv[])
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{
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int ret, i;
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/*
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* Set stdout to be unbuffered to avoid having to fflush when
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* printing without a newline.
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*/
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setvbuf(stdout, NULL, _IONBF, 0);
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if ( argc <= 1 )
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{
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show_help();
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return 0;
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}
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for ( i = 0; i < ARRAY_SIZE(main_options); i++ )
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if ( !strncmp(main_options[i].name, argv[1], strlen(argv[1])) )
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break;
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if ( i == ARRAY_SIZE(main_options) )
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{
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show_help();
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return 0;
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}
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else
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{
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xch = xc_interface_open(0, 0, 0);
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if ( !xch )
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{
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fprintf(stderr, "failed to get the handler\n");
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return 0;
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}
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ret = main_options[i].function(argc - 2, argv + 2);
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xc_interface_close(xch);
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}
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/*
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* Exitcode 0 for success.
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* Exitcode 1 for an error.
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* Exitcode 2 if the operation should be retried for any reason (e.g. a
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* timeout or because another operation was in progress).
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*/
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#define EXIT_TIMEOUT (EXIT_FAILURE + 1)
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BUILD_BUG_ON(EXIT_SUCCESS != 0);
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BUILD_BUG_ON(EXIT_FAILURE != 1);
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BUILD_BUG_ON(EXIT_TIMEOUT != 2);
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switch ( ret )
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{
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case 0:
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return EXIT_SUCCESS;
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case EAGAIN:
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case EBUSY:
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return EXIT_TIMEOUT;
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default:
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return EXIT_FAILURE;
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}
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}
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