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76 lines
2.5 KiB
C
76 lines
2.5 KiB
C
/*
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* Copyright (c) 2010, Stefan Lankes, RWTH Aachen University
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* * Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this
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* software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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* (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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* LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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* ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <stdlib.h>
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#include <stdio.h>
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#include <string.h>
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#include <unistd.h>
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#include <errno.h>
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#include <signal.h>
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#define N 255
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static void test_handler(int s)
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{
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printf("Receive signal with number %d\n", s);
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}
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int main(int argc, char** argv)
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{
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int i, random;
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FILE* file;
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// register test handler
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signal(SIGUSR1, test_handler);
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printf("Hello World!!!\n");
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//for(i=0; environ[i]; i++)
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// printf("environ[%d] = %s\n", i, environ[i]);
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for(i=0; i<argc; i++)
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printf("argv[%d] = %s\n", i, argv[i]);
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raise(SIGUSR1);
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file = fopen("/etc/hostname", "r");
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if (file)
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{
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char fname[N] = "";
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fscanf(file, "%s", fname);
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printf("Hostname: %s\n", fname);
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fclose(file);
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} else fprintf(stderr, "Unable to open file /etc/hostname\n");
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file = fopen("/tmp/test.txt", "w");
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if (file)
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{
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fprintf(file, "Hello World!!!\n");
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fclose(file);
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} else fprintf(stderr, "Unable to open file /tmp/test.txt\n");
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return 0;
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}
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