Tobias Brunner
5947d48fb9
fgetc() returns an int and EOF is usually -1 so when this gets casted to a char the result depends on whether `char` means `signed char` or `unsigned char` (the C standard does not specify it). If it is unsigned then its value is 0xff so the comparison with EOF will fail as that is an implicit signed int.
106 lines
2.1 KiB
C
106 lines
2.1 KiB
C
/*
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* Copyright (C) 2012 Martin Willi
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* Copyright (C) 2012 revosec AG
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version. See <http://www.fsf.org/copyleft/gpl.txt>.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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* for more details.
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*/
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#include "load_tester_control.h"
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#include <sys/socket.h>
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#include <sys/un.h>
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#include <unistd.h>
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#include <stddef.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <errno.h>
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/**
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* Connect to the daemon, return stream
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*/
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static FILE* make_connection()
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{
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struct sockaddr_un addr;
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FILE *stream;
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int fd;
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addr.sun_family = AF_UNIX;
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strcpy(addr.sun_path, LOAD_TESTER_SOCKET);
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fd = socket(AF_UNIX, SOCK_STREAM, 0);
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if (fd < 0)
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{
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fprintf(stderr, "opening socket failed: %s\n", strerror(errno));
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return NULL;
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}
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if (connect(fd, (struct sockaddr *)&addr,
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offsetof(struct sockaddr_un, sun_path) + strlen(addr.sun_path)) < 0)
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{
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fprintf(stderr, "connecting to %s failed: %s\n",
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LOAD_TESTER_SOCKET, strerror(errno));
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close(fd);
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return NULL;
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}
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stream = fdopen(fd, "r+");
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if (!stream)
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{
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close(fd);
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return NULL;
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}
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return stream;
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}
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/**
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* Initiate load-tests
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*/
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static int initiate(unsigned int count, unsigned int delay)
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{
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FILE *stream;
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int c;
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stream = make_connection();
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if (!stream)
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{
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return 1;
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}
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fprintf(stream, "%u %u\n", count, delay);
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while (1)
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{
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fflush(stream);
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c = fgetc(stream);
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if (c == EOF)
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{
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break;
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}
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if (fputc(c, stdout) == EOF)
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{
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break;
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}
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fflush(stdout);
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}
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fclose(stream);
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return 0;
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}
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int main(int argc, char *argv[])
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{
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if (argc >= 3 && strcmp(argv[1], "initiate") == 0)
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{
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return initiate(atoi(argv[2]), argc > 3 ? atoi(argv[3]) : 0);
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}
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fprintf(stderr, "Usage:\n");
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fprintf(stderr, " %s initiate <count> [<delay in ms>]\n", argv[0]);
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return 1;
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}
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