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/*
* The MIT License
*
* Copyright (C) 2010-2017 Alexander Saprykin <saprykin.spb@gmail.com>
*
* Permission is hereby granted, free of charge, to any person obtaining
* a copy of this software and associated documentation files (the
* 'Software'), to deal in the Software without restriction, including
* without limitation the rights to use, copy, modify, merge, publish,
* distribute, sublicense, and/or sell copies of the Software, and to
* permit persons to whom the Software is furnished to do so, subject to
* the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED 'AS IS', WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*/
#include "pmem.h"
#include "pcryptohash.h"
#include "pstring.h"
#include "psysclose-private.h"
#include <stdlib.h>
#include <string.h>
#if !defined (P_OS_WIN) && !defined (P_OS_OS2) && !defined (P_OS_AMIGA)
# include <unistd.h>
# include <errno.h>
# include <fcntl.h>
# include <sys/stat.h>
# include <sys/types.h>
# include <sys/ipc.h>
#endif
#if !defined (P_OS_WIN) && !defined (P_OS_OS2) && !defined (P_OS_AMIGA)
pchar *
p_ipc_unix_get_temp_dir (void)
{
pchar *str, *ret;
psize len;
#ifdef P_tmpdir
if (strlen (P_tmpdir) > 0)
str = p_strdup (P_tmpdir);
else
return p_strdup ("/tmp/");
#else
const pchar *tmp_env;
tmp_env = getenv ("TMPDIR");
if (tmp_env != NULL)
str = p_strdup (tmp_env);
else
return p_strdup ("/tmp/");
#endif /* P_tmpdir */
/* Now we need to ensure that we have only the one trailing slash */
len = strlen (str);
while (*(str + --len) == '/')
;
*(str + ++len) = '\0';
/* len + / + zero symbol */
if (P_UNLIKELY ((ret = p_malloc0 (len + 2)) == NULL)) {
p_free (str);
return NULL;
}
strcpy (ret, str);
strcat (ret, "/");
return ret;
}
/* Create file for System V IPC, if needed
* Returns: -1 = error, 0 = file successfully created, 1 = file already exists */
pint
p_ipc_unix_create_key_file (const pchar *file_name)
{
pint fd;
if (P_UNLIKELY (file_name == NULL))
return -1;
if ((fd = open (file_name, O_CREAT | O_EXCL | O_RDONLY, 0640)) == -1)
/* file already exists */
return (errno == EEXIST) ? 1 : -1;
else
return p_sys_close (fd);
}
pint
p_ipc_unix_get_ftok_key (const pchar *file_name)
{
struct stat st_info;
if (P_UNLIKELY (file_name == NULL))
return -1;
if (P_UNLIKELY (stat (file_name, &st_info) == -1))
return -1;
return ftok (file_name, 'P');
}
#endif /* !P_OS_WIN && !P_OS_OS2 && !P_OS_AMIGA */
/* Returns a platform-independent key for IPC usage, object name for Windows and
* a file name to use with ftok () for UNIX-like systems */
pchar *
p_ipc_get_platform_key (const pchar *name, pboolean posix)
{
PCryptoHash *sha1;
pchar *hash_str;
#if defined (P_OS_WIN) || defined (P_OS_OS2) || defined (P_OS_AMIGA)
P_UNUSED (posix);
#else
pchar *path_name, *tmp_path;
#endif
if (P_UNLIKELY (name == NULL))
return NULL;
if (P_UNLIKELY ((sha1 = p_crypto_hash_new (P_CRYPTO_HASH_TYPE_SHA1)) == NULL))
return NULL;
p_crypto_hash_update (sha1, (const puchar *) name, strlen (name));
hash_str = p_crypto_hash_get_string (sha1);
p_crypto_hash_free (sha1);
if (P_UNLIKELY (hash_str == NULL))
return NULL;
#if defined (P_OS_WIN) || defined (P_OS_OS2) || defined (P_OS_AMIGA)
return hash_str;
#else
if (posix) {
/* POSIX semaphores which are named kinda like '/semname'.
* Some implementations of POSIX semaphores has restriction for
* the name as of max 14 characters, best to use this limit */
if (P_UNLIKELY ((path_name = p_malloc0 (15)) == NULL)) {
p_free (hash_str);
return NULL;
}
strcpy (path_name, "/");
strncat (path_name, hash_str, 13);
} else {
tmp_path = p_ipc_unix_get_temp_dir ();
/* tmp dir + filename + zero symbol */
path_name = p_malloc0 (strlen (tmp_path) + strlen (hash_str) + 1);
if (P_UNLIKELY ((path_name) == NULL)) {
p_free (tmp_path);
p_free (hash_str);
return NULL;
}
strcpy (path_name, tmp_path);
strcat (path_name, hash_str);
p_free (tmp_path);
}
p_free (hash_str);
return path_name;
#endif
}
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