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/*
* wpa_supplicant/hostapd / Internal implementation of OS specific functions
* Copyright (c) 2005-2006, Jouni Malinen <j@w1.fi>
*
* 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.
*
* Alternatively, this software may be distributed under the terms of BSD
* license.
*
* See README and COPYING for more details.
*
* This file is an example of operating system specific wrapper functions.
* This version implements many of the functions internally, so it can be used
* to fill in missing functions from the target system C libraries.
*
* Some of the functions are using standard C library calls in order to keep
* this file in working condition to allow the functions to be tested on a
* Linux target. Please note that OS_NO_C_LIB_DEFINES needs to be defined for
* this file to work correctly. Note that these implementations are only
* examples and are not optimized for speed.
*/
#include "includes.h"
#undef OS_REJECT_C_LIB_FUNCTIONS
#include "os.h"
void os_sleep(os_time_t sec, os_time_t usec)
{
if (sec)
sleep(sec);
if (usec)
usleep(usec);
}
int os_get_time(struct os_time *t)
{
int res;
struct timeval tv;
res = gettimeofday(&tv, NULL);
t->sec = tv.tv_sec;
t->usec = tv.tv_usec;
return res;
}
int os_mktime(int year, int month, int day, int hour, int min, int sec,
os_time_t *t)
{
struct tm tm;
if (year < 1970 || month < 1 || month > 12 || day < 1 || day > 31 ||
hour < 0 || hour > 23 || min < 0 || min > 59 || sec < 0 ||
sec > 60)
return -1;
os_memset(&tm, 0, sizeof(tm));
tm.tm_year = year - 1900;
tm.tm_mon = month - 1;
tm.tm_mday = day;
tm.tm_hour = hour;
tm.tm_min = min;
tm.tm_sec = sec;
*t = (os_time_t) mktime(&tm);
return 0;
}
int os_daemonize(const char *pid_file)
{
if (daemon(0, 0)) {
perror("daemon");
return -1;
}
if (pid_file) {
FILE *f = fopen(pid_file, "w");
if (f) {
fprintf(f, "%u\n", getpid());
fclose(f);
}
}
return -0;
}
void os_daemonize_terminate(const char *pid_file)
{
if (pid_file)
unlink(pid_file);
}
int os_get_random(unsigned char *buf, size_t len)
{
FILE *f;
size_t rc;
f = fopen("/dev/urandom", "rb");
if (f == NULL) {
printf("Could not open /dev/urandom.\n");
return -1;
}
rc = fread(buf, 1, len, f);
fclose(f);
return rc != len ? -1 : 0;
}
unsigned long os_random(void)
{
return random();
}
char * os_rel2abs_path(const char *rel_path)
{
char *buf = NULL, *cwd, *ret;
size_t len = 128, cwd_len, rel_len, ret_len;
if (rel_path[0] == '/')
return os_strdup(rel_path);
for (;;) {
buf = os_malloc(len);
if (buf == NULL)
return NULL;
cwd = getcwd(buf, len);
if (cwd == NULL) {
os_free(buf);
if (errno != ERANGE) {
return NULL;
}
len *= 2;
} else {
break;
}
}
cwd_len = strlen(cwd);
rel_len = strlen(rel_path);
ret_len = cwd_len + 1 + rel_len + 1;
ret = os_malloc(ret_len);
if (ret) {
os_memcpy(ret, cwd, cwd_len);
ret[cwd_len] = '/';
os_memcpy(ret + cwd_len + 1, rel_path, rel_len);
ret[ret_len - 1] = '\0';
}
os_free(buf);
return ret;
}
int os_program_init(void)
{
return 0;
}
void os_program_deinit(void)
{
}
int os_setenv(const char *name, const char *value, int overwrite)
{
return setenv(name, value, overwrite);
}
int os_unsetenv(const char *name)
{
#if defined(__FreeBSD__) || defined(__NetBSD__)
unsetenv(name);
return 0;
#else
return unsetenv(name);
#endif
}
char * os_readfile(const char *name, size_t *len)
{
FILE *f;
char *buf;
f = fopen(name, "rb");
if (f == NULL)
return NULL;
fseek(f, 0, SEEK_END);
*len = ftell(f);
fseek(f, 0, SEEK_SET);
buf = os_malloc(*len);
if (buf == NULL) {
fclose(f);
return NULL;
}
fread(buf, 1, *len, f);
fclose(f);
return buf;
}
void * os_zalloc(size_t size)
{
void *n = os_malloc(size);
if (n)
os_memset(n, 0, size);
return n;
}
void * os_malloc(size_t size)
{
return malloc(size);
}
void * os_realloc(void *ptr, size_t size)
{
return realloc(ptr, size);
}
void os_free(void *ptr)
{
free(ptr);
}
void * os_memcpy(void *dest, const void *src, size_t n)
{
char *d = dest;
const char *s = src;
while (n--)
*d++ = *s++;
return dest;
}
void * os_memmove(void *dest, const void *src, size_t n)
{
if (dest < src)
os_memcpy(dest, src, n);
else {
/* overlapping areas */
char *d = (char *) dest + n;
const char *s = (const char *) src + n;
while (n--)
*--d = *--s;
}
return dest;
}
void * os_memset(void *s, int c, size_t n)
{
char *p = s;
while (n--)
*p++ = c;
return s;
}
int os_memcmp(const void *s1, const void *s2, size_t n)
{
const unsigned char *p1 = s1, *p2 = s2;
if (n == 0)
return 0;
while (*p1 == *p2) {
p1++;
p2++;
n--;
if (n == 0)
return 0;
}
return *p1 - *p2;
}
char * os_strdup(const char *s)
{
char *res;
size_t len;
if (s == NULL)
return NULL;
len = os_strlen(s);
res = os_malloc(len + 1);
if (res)
os_memcpy(res, s, len + 1);
return res;
}
size_t os_strlen(const char *s)
{
const char *p = s;
while (*p)
p++;
return p - s;
}
int os_strcasecmp(const char *s1, const char *s2)
{
/*
* Ignoring case is not required for main functionality, so just use
* the case sensitive version of the function.
*/
return os_strcmp(s1, s2);
}
int os_strncasecmp(const char *s1, const char *s2, size_t n)
{
/*
* Ignoring case is not required for main functionality, so just use
* the case sensitive version of the function.
*/
return os_strncmp(s1, s2, n);
}
char * os_strchr(const char *s, int c)
{
while (*s) {
if (*s == c)
return (char *) s;
s++;
}
return NULL;
}
char * os_strrchr(const char *s, int c)
{
const char *p = s;
while (*p)
p++;
p--;
while (p >= s) {
if (*p == c)
return (char *) p;
p--;
}
return NULL;
}
int os_strcmp(const char *s1, const char *s2)
{
while (*s1 == *s2) {
if (*s1 == '\0')
break;
s1++;
s2++;
}
return *s1 - *s2;
}
int os_strncmp(const char *s1, const char *s2, size_t n)
{
if (n == 0)
return 0;
while (*s1 == *s2) {
if (*s1 == '\0')
break;
s1++;
s2++;
n--;
if (n == 0)
return 0;
}
return *s1 - *s2;
}
char * os_strncpy(char *dest, const char *src, size_t n)
{
char *d = dest;
while (n--) {
*d = *src;
if (*src == '\0')
break;
d++;
src++;
}
return dest;
}
char * os_strstr(const char *haystack, const char *needle)
{
size_t len = os_strlen(needle);
while (*haystack) {
if (os_strncmp(haystack, needle, len) == 0)
return (char *) haystack;
haystack++;
}
return NULL;
}
int os_snprintf(char *str, size_t size, const char *format, ...)
{
va_list ap;
int ret;
/* See http://www.ijs.si/software/snprintf/ for portable
* implementation of snprintf.
*/
va_start(ap, format);
ret = vsnprintf(str, size, format, ap);
va_end(ap);
if (size > 0)
str[size - 1] = '\0';
return ret;
}
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