2 * wpa_supplicant/hostapd / Internal implementation of OS specific functions
3 * Copyright (c) 2005-2006, Jouni Malinen <j@w1.fi>
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2 as
7 * published by the Free Software Foundation.
9 * Alternatively, this software may be distributed under the terms of BSD
12 * See README and COPYING for more details.
14 * This file is an example of operating system specific wrapper functions.
15 * This version implements many of the functions internally, so it can be used
16 * to fill in missing functions from the target system C libraries.
18 * Some of the functions are using standard C library calls in order to keep
19 * this file in working condition to allow the functions to be tested on a
20 * Linux target. Please note that OS_NO_C_LIB_DEFINES needs to be defined for
21 * this file to work correctly. Note that these implementations are only
22 * examples and are not optimized for speed.
27 #undef OS_REJECT_C_LIB_FUNCTIONS
30 void os_sleep(os_time_t sec, os_time_t usec)
39 int os_get_time(struct os_time *t)
43 res = gettimeofday(&tv, NULL);
50 int os_mktime(int year, int month, int day, int hour, int min, int sec,
55 if (year < 1970 || month < 1 || month > 12 || day < 1 || day > 31 ||
56 hour < 0 || hour > 23 || min < 0 || min > 59 || sec < 0 ||
60 os_memset(&tm, 0, sizeof(tm));
61 tm.tm_year = year - 1900;
62 tm.tm_mon = month - 1;
68 *t = (os_time_t) mktime(&tm);
73 int os_daemonize(const char *pid_file)
81 FILE *f = fopen(pid_file, "w");
83 fprintf(f, "%u\n", getpid());
92 void os_daemonize_terminate(const char *pid_file)
99 int os_get_random(unsigned char *buf, size_t len)
104 f = fopen("/dev/urandom", "rb");
106 printf("Could not open /dev/urandom.\n");
110 rc = fread(buf, 1, len, f);
113 return rc != len ? -1 : 0;
117 unsigned long os_random(void)
123 char * os_rel2abs_path(const char *rel_path)
125 char *buf = NULL, *cwd, *ret;
126 size_t len = 128, cwd_len, rel_len, ret_len;
128 if (rel_path[0] == '/')
129 return os_strdup(rel_path);
132 buf = os_malloc(len);
135 cwd = getcwd(buf, len);
138 if (errno != ERANGE) {
147 cwd_len = strlen(cwd);
148 rel_len = strlen(rel_path);
149 ret_len = cwd_len + 1 + rel_len + 1;
150 ret = os_malloc(ret_len);
152 os_memcpy(ret, cwd, cwd_len);
154 os_memcpy(ret + cwd_len + 1, rel_path, rel_len);
155 ret[ret_len - 1] = '\0';
162 int os_program_init(void)
168 void os_program_deinit(void)
173 int os_setenv(const char *name, const char *value, int overwrite)
175 return setenv(name, value, overwrite);
179 int os_unsetenv(const char *name)
181 #if defined(__FreeBSD__) || defined(__NetBSD__)
185 return unsetenv(name);
190 char * os_readfile(const char *name, size_t *len)
195 f = fopen(name, "rb");
199 fseek(f, 0, SEEK_END);
201 fseek(f, 0, SEEK_SET);
203 buf = os_malloc(*len);
209 fread(buf, 1, *len, f);
216 void * os_zalloc(size_t size)
218 void *n = os_malloc(size);
220 os_memset(n, 0, size);
225 void * os_malloc(size_t size)
231 void * os_realloc(void *ptr, size_t size)
233 return realloc(ptr, size);
237 void os_free(void *ptr)
243 void * os_memcpy(void *dest, const void *src, size_t n)
253 void * os_memmove(void *dest, const void *src, size_t n)
256 os_memcpy(dest, src, n);
258 /* overlapping areas */
259 char *d = (char *) dest + n;
260 const char *s = (const char *) src + n;
268 void * os_memset(void *s, int c, size_t n)
277 int os_memcmp(const void *s1, const void *s2, size_t n)
279 const unsigned char *p1 = s1, *p2 = s2;
296 char * os_strdup(const char *s)
303 res = os_malloc(len + 1);
305 os_memcpy(res, s, len + 1);
310 size_t os_strlen(const char *s)
319 int os_strcasecmp(const char *s1, const char *s2)
322 * Ignoring case is not required for main functionality, so just use
323 * the case sensitive version of the function.
325 return os_strcmp(s1, s2);
329 int os_strncasecmp(const char *s1, const char *s2, size_t n)
332 * Ignoring case is not required for main functionality, so just use
333 * the case sensitive version of the function.
335 return os_strncmp(s1, s2, n);
339 char * os_strchr(const char *s, int c)
350 char * os_strrchr(const char *s, int c)
365 int os_strcmp(const char *s1, const char *s2)
378 int os_strncmp(const char *s1, const char *s2, size_t n)
397 char * os_strncpy(char *dest, const char *src, size_t n)
413 char * os_strstr(const char *haystack, const char *needle)
415 size_t len = os_strlen(needle);
417 if (os_strncmp(haystack, needle, len) == 0)
418 return (char *) haystack;
426 int os_snprintf(char *str, size_t size, const char *format, ...)
431 /* See http://www.ijs.si/software/snprintf/ for portable
432 * implementation of snprintf.
435 va_start(ap, format);
436 ret = vsnprintf(str, size, format, ap);
439 str[size - 1] = '\0';