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https://github.com/xen-project/xen.git
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Juergen Gross
cbc86340ac
When xenstored crashes due to an unrecoverable condition it is calling either barf() or barf_perror() to issue a message and then exit(). Make sure the message is visible somewhere by using syslog() additionally to xprintf(), as the latter will be visible only with tracing active. Signed-off-by: Juergen Gross <jgross@suse.com> Reviewed-by: Paul Durrant <paul@xen.org> Reviewed-by: Julien Grall <jgrall@amazon.com>
65 lines
1.1 KiB
C
65 lines
1.1 KiB
C
#define _GNU_SOURCE
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#include <stdio.h>
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#include <stdarg.h>
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#include <stdlib.h>
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#include <string.h>
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#include <syslog.h>
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#include <errno.h>
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#include <unistd.h>
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#include <fcntl.h>
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#include <sys/types.h>
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#include <signal.h>
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#include "utils.h"
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static void default_xprintf(const char *fmt, ...)
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{
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va_list args;
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va_start(args, fmt);
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vfprintf(stderr, fmt, args);
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va_end(args);
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fflush(stderr);
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}
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void (*xprintf)(const char *fmt, ...) = default_xprintf;
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void barf(const char *fmt, ...)
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{
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char *str;
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int bytes;
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va_list arglist;
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xprintf("FATAL: ");
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va_start(arglist, fmt);
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bytes = vasprintf(&str, fmt, arglist);
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va_end(arglist);
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if (bytes >= 0) {
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syslog(LOG_CRIT, "%s\n", str);
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xprintf("%s\n", str);
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free(str);
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}
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exit(1);
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}
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void barf_perror(const char *fmt, ...)
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{
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char *str;
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int bytes, err = errno;
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va_list arglist;
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xprintf("FATAL: ");
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va_start(arglist, fmt);
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bytes = vasprintf(&str, fmt, arglist);
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va_end(arglist);
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if (bytes >= 0) {
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syslog(LOG_CRIT, "%s: %s\n", str, strerror(err));
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xprintf("%s: %s\n", str, strerror(err));
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free(str);
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}
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exit(1);
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}
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