diff options
Diffstat (limited to 'workspace/customdhcpcd/src/common.c')
| -rw-r--r-- | workspace/customdhcpcd/src/common.c | 249 |
1 files changed, 0 insertions, 249 deletions
diff --git a/workspace/customdhcpcd/src/common.c b/workspace/customdhcpcd/src/common.c deleted file mode 100644 index 99471bc..0000000 --- a/workspace/customdhcpcd/src/common.c +++ /dev/null @@ -1,249 +0,0 @@ -/* - * dhcpcd - DHCP client daemon - * Copyright 2006-2008 Roy Marples <roy@marples.name> - * All rights reserved - - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in the - * documentation and/or other materials provided with the distribution. - * - * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND - * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE - * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE - * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE - * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL - * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS - * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) - * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY - * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF - * SUCH DAMAGE. - */ - -#include <sys/time.h> -#include <errno.h> -#include <fcntl.h> -#include <stdio.h> -#include <stdlib.h> -#include <string.h> -#include <time.h> -#include <unistd.h> - -#include "common.h" -#include "logger.h" - -/* Handy routine to read very long lines in text files. - * This means we read the whole line and avoid any nasty buffer overflows. */ -char *get_line (FILE *fp) -{ - char *line = NULL; - char *p; - size_t len = 0; - size_t last = 0; - - if (feof (fp)) - return (NULL); - - do { - len += BUFSIZ; - line = xrealloc (line, sizeof (char) * len); - p = line + last; - memset (p, 0, BUFSIZ); - fgets (p, BUFSIZ, fp); - last += strlen (p); - } while (! feof (fp) && line[last - 1] != '\n'); - - /* Trim the trailing newline */ - if (*line && line[--last] == '\n') - line[last] = '\0'; - - return (line); -} - -/* OK, this should be in dhcpcd.c - * It's here to make dhcpcd more readable */ -#ifndef HAVE_SRANDOMDEV -void srandomdev (void) -{ - int fd; - unsigned long seed; - - fd = open ("/dev/urandom", 0); - if (fd == -1 || read (fd, &seed, sizeof (seed)) == -1) { - logger (LOG_WARNING, "Could not read from /dev/urandom: %s", - strerror (errno)); - seed = time (0); - } - if (fd >= 0) - close(fd); - - srandom (seed); -} -#endif - -/* strlcpy is nice, shame glibc does not define it */ -#ifndef HAVE_STRLCPY -size_t strlcpy (char *dst, const char *src, size_t size) -{ - const char *s = src; - size_t n = size; - - if (n && --n) - do { - if (! (*dst++ = *src++)) - break; - } while (--n); - - if (! n) { - if (size) - *dst = '\0'; - while (*src++); - } - - return (src - s - 1); -} -#endif - -/* Close our fd's */ -int close_fds (void) -{ - int fd; - - if ((fd = open ("/dev/null", O_RDWR)) == -1) { - logger (LOG_ERR, "open `/dev/null': %s", strerror (errno)); - return (-1); - } - - dup2 (fd, fileno (stdin)); - dup2 (fd, fileno (stdout)); - dup2 (fd, fileno (stderr)); - if (fd > 2) - close (fd); - return (0); -} - -int close_on_exec (int fd) -{ - int flags; - - if ((flags = fcntl (fd, F_GETFD, 0)) == -1 - || fcntl (fd, F_SETFD, flags | FD_CLOEXEC) == -1) - { - logger (LOG_ERR, "fcntl: %s", strerror (errno)); - return (-1); - } - return (0); -} - -/* Handy function to get the time. - * We only care about time advancements, not the actual time itself - * Which is why we use CLOCK_MONOTONIC, but it is not available on all - * platforms. - */ -int get_time (struct timeval *tp) -{ -#if defined(_POSIX_MONOTONIC_CLOCK) && defined(CLOCK_MONOTONIC) - struct timespec ts; - static clockid_t posix_clock; - static int posix_clock_set = 0; - - if (! posix_clock_set) { - if (sysconf (_SC_MONOTONIC_CLOCK) >= 0) - posix_clock = CLOCK_MONOTONIC; - else - posix_clock = CLOCK_REALTIME; - posix_clock_set = 1; - } - - if (clock_gettime (posix_clock, &ts) == -1) { - logger (LOG_ERR, "clock_gettime: %s", strerror (errno)); - return (-1); - } - - tp->tv_sec = ts.tv_sec; - tp->tv_usec = ts.tv_nsec / 1000; - return (0); -#else - if (gettimeofday (tp, NULL) == -1) { - logger (LOG_ERR, "gettimeofday: %s", strerror (errno)); - return (-1); - } - return (0); -#endif -} - -time_t uptime (void) -{ - struct timeval tp; - - if (get_time (&tp) == -1) - return (-1); - - return (tp.tv_sec); -} - -void writepid (int fd, pid_t pid) -{ - char spid[16]; - if (ftruncate (fd, (off_t) 0) == -1) { - logger (LOG_ERR, "ftruncate: %s", strerror (errno)); - } else { - ssize_t len; - snprintf (spid, sizeof (spid), "%u", pid); - len = pwrite (fd, spid, strlen (spid), (off_t) 0); - if (len != (ssize_t) strlen (spid)) - logger (LOG_ERR, "pwrite: %s", strerror (errno)); - } -} - -void *xmalloc (size_t s) -{ - void *value = malloc (s); - - if (value) - return (value); - - logger (LOG_ERR, "memory exhausted"); - - exit (EXIT_FAILURE); - /* NOTREACHED */ -} - -void *xzalloc (size_t s) -{ - void *value = xmalloc (s); - memset (value, 0, s); - return (value); -} - -void *xrealloc (void *ptr, size_t s) -{ - void *value = realloc (ptr, s); - - if (value) - return (value); - - logger (LOG_ERR, "memory exhausted"); - exit (EXIT_FAILURE); - /* NOTREACHED */ -} - -char *xstrdup (const char *str) -{ - char *value; - - if (! str) - return (NULL); - - if ((value = strdup (str))) - return (value); - - logger (LOG_ERR, "memory exhausted"); - exit (EXIT_FAILURE); - /* NOTREACHED */ -} |