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/*
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* Copyright (C) 2018 ABRT team
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* Copyright (C) 2018 RedHat Inc
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <stdio.h>
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#include <unistd.h>
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#include <sys/types.h>
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#include <string.h>
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#define INIT_PROC_STDERR_FD_PATH "/proc/1/fd/2"
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#define DEFAULT_TAG "container-exception-logger"
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int main(int argc, char *argv[])
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{
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const char *program_usage_string =
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Martin Kutlak |
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"Usage: container-exception-logger [--no-tag | --tag STRING | --help]"
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"\n"
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"\nThe tool reads from standard input and writes to '"INIT_PROC_STDERR_FD_PATH"'";
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int opt_notag = 0;
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const char * opt_tag = NULL;
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if (argc > 1)
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{
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for (int i = 1; i < argc; ++i)
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{
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if (strcmp(argv[i], "--help") == 0 || strcmp(argv[i], "-h") == 0)
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{
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fprintf(stderr, "%s\n", program_usage_string);
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return 1;
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}
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else if (strcmp(argv[i], "--no-tag") == 0)
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{
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opt_notag = 1;
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}
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else if (strcmp(argv[i], "--tag") == 0
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&& i + 1 < argc
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&& argv[i + 1][0] != '-')
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{
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opt_tag = argv[++i];
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}
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else
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{
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fprintf(stderr, "%s\n", program_usage_string);
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return 1;
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}
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}
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}
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FILE *f = fopen(INIT_PROC_STDERR_FD_PATH, "w");
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if (f == NULL)
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{
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perror("Failed to open '"INIT_PROC_STDERR_FD_PATH"'");
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return 2;
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}
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setvbuf (f, NULL, _IONBF, 0);
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if (!opt_notag)
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fprintf(f, "%s - ", opt_tag ? opt_tag : DEFAULT_TAG);
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char buffer[BUFSIZ];
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ssize_t bytes_read = 0;
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while (1)
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{
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bytes_read = read(0, buffer, sizeof buffer);
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if (bytes_read <= 0)
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break;
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if (fwrite(buffer, bytes_read, 1, f) != 1)
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{
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perror("Failed to write to '"INIT_PROC_STDERR_FD_PATH"'");
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fclose(f);
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return 3;
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}
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}
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fclose(f);
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return 0;
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}
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