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Diffstat (limited to '3rdparty/plibsys/src/pipc.c')
| -rw-r--r-- | 3rdparty/plibsys/src/pipc.c | 178 |
1 files changed, 178 insertions, 0 deletions
diff --git a/3rdparty/plibsys/src/pipc.c b/3rdparty/plibsys/src/pipc.c new file mode 100644 index 0000000..60093ee --- /dev/null +++ b/3rdparty/plibsys/src/pipc.c @@ -0,0 +1,178 @@ +/* + * 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 +} |