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/*
mtr -- a network diagnostic tool
Copyright (C) 1997,1998 Matt Kimball
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License version 2 as
published by the Free Software Foundation.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License along
with this program; if not, write to the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "config.h"
#include <ctype.h>
#include <errno.h>
#include <limits.h>
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <unistd.h>
#ifdef HAVE_ERROR_H
#include <error.h>
#else
#include "portability/error.h"
#endif
#ifdef HAVE_STDIO_EXT_H
#include <stdio_ext.h>
#endif
#include "utils.h"
char *trim(
char *str,
const char c)
{
char *p = str;
size_t len;
/* left trim */
while (*p && (isspace((unsigned char) *p) || (c && *p == c)))
p++;
if (str < p) {
len = strlen(str);
memmove(str, p, len + 1);
}
/* right trim */
len = strlen(str);
while (len) {
len--;
if (isspace((unsigned char) str[len]) || (c && str[len] == c)) {
continue;
}
len++;
break;
}
str[len] = '\0';
return str;
}
/* Parse string, and return positive signed int. */
int strtonum_or_err(
const char *str,
const char *errmesg,
const int type)
{
unsigned long int num;
char *end = NULL;
if (str != NULL && *str != '\0') {
errno = 0;
num = strtoul(str, &end, 10);
if (errno == 0 && str != end && end != NULL && *end == '\0') {
switch (type) {
case STRTO_INT:
if (num < INT_MAX)
return num;
break;
case STRTO_U32INT:
if (num < UINT32_MAX)
return num;
break;
}
}
}
error(EXIT_FAILURE, errno, "%s: '%s'", errmesg, str);
return 0;
}
float strtofloat_or_err(
const char *str,
const char *errmesg)
{
double num;
char *end = NULL;
if (str != NULL && *str != '\0') {
errno = 0;
num = strtod(str, &end);
if (errno == 0 && str != end && end != NULL && *end == '\0'
#ifdef FLT_MAX
&& num < FLT_MAX
#endif
)
return num;
}
error(EXIT_FAILURE, errno, "%s: '%s'", errmesg, str);
return 0;
}
void *xmalloc(
const size_t size)
{
void *ret = malloc(size);
if (!ret && size)
error(EXIT_FAILURE, errno, "cannot allocate %zu bytes", size);
return ret;
}
char *xstrdup(
const char *str)
{
char *ret;
if (!str)
return NULL;
ret = strdup(str);
if (!ret)
error(EXIT_FAILURE, errno, "cannot duplicate string: %s", str);
return ret;
}
#ifndef HAVE___FPENDING
static inline int __fpending(
FILE * stream __attribute__ ((__unused__)))
{
return 0;
}
#endif
static inline int close_stream(
FILE * stream)
{
const int some_pending = (__fpending(stream) != 0);
const int prev_fail = (ferror(stream) != 0);
const int fclose_fail = (fclose(stream) != 0);
if (prev_fail || (fclose_fail && (some_pending || errno != EBADF))) {
if (!fclose_fail && !(errno == EPIPE))
errno = 0;
return EOF;
}
return 0;
}
/* Meant to be used atexit(close_stdout); */
void close_stdout(
void)
{
if (close_stream(stdout) != 0 && !(errno == EPIPE)) {
error(0, errno, "write error");
_exit(EXIT_FAILURE);
}
if (close_stream(stderr) != 0)
_exit(EXIT_FAILURE);
}
/* ctime() replacement that will reteturn ISO-8601 timestamp string such as:
* 2016-08-29T19:25:02+01:00 */
const char *iso_time(
const time_t * t)
{
static char s[32];
struct tm *tm;
tm = localtime(t);
strftime(s, sizeof(s), "%Y-%m-%dT%H:%M:%S%z", tm);
return s;
}
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