mirror of
https://github.com/systemd/systemd.git
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82 lines
1.7 KiB
C
82 lines
1.7 KiB
C
/*
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* Copyright (C) 2004-2008 Kay Sievers <kay.sievers@vrfy.org>
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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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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <stdlib.h>
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#include <stdio.h>
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#include <stddef.h>
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#include <unistd.h>
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#include <string.h>
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#include <fcntl.h>
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#include <errno.h>
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#include <ctype.h>
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#include <dirent.h>
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#include <sys/stat.h>
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#include <sys/mman.h>
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#include "udev.h"
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int file_map(const char *filename, char **buf, size_t *bufsize)
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{
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struct stat stats;
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int fd;
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fd = open(filename, O_RDONLY);
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if (fd < 0) {
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return -1;
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}
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if (fstat(fd, &stats) < 0) {
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close(fd);
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return -1;
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}
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*buf = mmap(NULL, stats.st_size, PROT_READ, MAP_SHARED, fd, 0);
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if (*buf == MAP_FAILED) {
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close(fd);
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return -1;
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}
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*bufsize = stats.st_size;
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close(fd);
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return 0;
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}
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void file_unmap(void *buf, size_t bufsize)
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{
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munmap(buf, bufsize);
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}
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/* return number of chars until the next newline, skip escaped newline */
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size_t buf_get_line(const char *buf, size_t buflen, size_t cur)
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{
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int escape = 0;
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size_t count;
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for (count = cur; count < buflen; count++) {
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if (!escape && buf[count] == '\n')
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break;
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if (buf[count] == '\\')
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escape = 1;
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else
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escape = 0;
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}
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return count - cur;
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}
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