ide/dlight.nativeexecution/tools/killall/src/error.c

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you under the Apache License, Version 2.0 (the
 * "License"); you may not use this file except in compliance
 * with the License.  You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing,
 * software distributed under the License is distributed on an
 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */

#include "error.h"

extern const char* progname;

/*
 * Print a message and return to caller.
 * Caller specifies "errnoflag".
 */
static void err_doit(int errnoflag, int error, const char *fmt, va_list ap) {
    char buf[MAXLINE];

    snprintf(buf, MAXLINE, "%s: ", progname);
    vsnprintf(buf + strlen(buf), MAXLINE, fmt, ap);

    if (errnoflag) {
        snprintf(buf + strlen(buf), MAXLINE - strlen(buf), ": %s", strerror(error));
    }

    strcat(buf, "\n");
    fflush(stdout); /* in case stdout and stderr are the same */
    fputs(buf, stderr);
    fflush(NULL); /* flushes all stdio output streams */
}

/*
 * Fatal error related to a system call.
 * Print a message and terminate.
 */
void err_sys(const char *fmt, ...) {
    va_list ap;
    va_start(ap, fmt);
    err_doit(1, errno, fmt, ap);
    va_end(ap);
    exit(1);
}

void warn_sys(const char *fmt, ...) {
    va_list ap;
    va_start(ap, fmt);
    err_doit(1, errno, fmt, ap);
    va_end(ap);
}

/*
 * Fatal error unrelated to a system call.
 * Print a message and terminate.
 */
void err_quit(const char *fmt, ...) {
    va_list ap;
    va_start(ap, fmt);
    err_doit(0, 0, fmt, ap);
    va_end(ap);
    exit(1);
}