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97 lines
2.7 KiB
C
97 lines
2.7 KiB
C
/*
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Copyright (c) 2021. The YARA Authors. All Rights Reserved.
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Redistribution and use in source and binary forms, with or without modification,
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are permitted provided that the following conditions are met:
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1. Redistributions of source code must retain the above copyright notice, this
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list of conditions and the following disclaimer.
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2. Redistributions in binary form must reproduce the above copyright notice,
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this list of conditions and the following disclaimer in the documentation and/or
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other materials provided with the distribution.
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3. Neither the name of the copyright holder nor the names of its contributors
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may be used to endorse or promote products derived from this software without
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specific prior written permission.
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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 COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR
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ANY 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 ON
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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 <errno.h>
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#include <fcntl.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 <sys/mman.h>
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#include <sys/stat.h>
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#include <sys/types.h>
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#include <unistd.h>
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char str[] = "!dlrow ,olleH";
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int fd;
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char* map_file(char* path)
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{
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if ((fd = open(path, O_RDONLY)) < 0)
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{
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fprintf(stderr, "open: %s: %s\n", path, strerror(errno));
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exit(1);
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}
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char* rv = mmap(NULL, 4096, PROT_READ | PROT_WRITE, MAP_PRIVATE, fd, 0);
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if (rv == NULL)
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{
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fprintf(stderr, "mmap: %s: failed: %s\n", path, strerror(errno));
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exit(1);
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}
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close(fd);
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return rv;
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}
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int main(int argc, char** argv)
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{
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char* buf;
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if (argc < 2)
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{
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fprintf(stderr, "no argument\n");
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exit(1);
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}
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else if (strcmp(argv[1], "open") == 0)
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{
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if (argc < 3)
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exit(1);
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printf("%s: %s %s\n", argv[0], argv[1], argv[2]);
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buf = map_file(argv[2]);
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}
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else if (strcmp(argv[1], "patch") == 0)
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{
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if (argc < 3)
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exit(1);
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printf("%s: %s %s\n", argv[0], argv[1], argv[2]);
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buf = map_file(argv[2]);
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for (int i = 0; i < sizeof(str) - 1; i++)
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{
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buf[i] = str[sizeof(str) - i - 2];
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}
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}
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else
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{
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fprintf(stderr, "unknown argument <%s>\n", argv[1]);
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exit(1);
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}
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sleep(3600);
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}
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