diff options
Diffstat (limited to 'doc/info')
| -rw-r--r-- | doc/info/mds.texinfo | 130 |
1 files changed, 129 insertions, 1 deletions
diff --git a/doc/info/mds.texinfo b/doc/info/mds.texinfo index 1628213..c4c89bd 100644 --- a/doc/info/mds.texinfo +++ b/doc/info/mds.texinfo @@ -5136,13 +5136,27 @@ write servers more concisely. @table @asis @item @code{parse_client_id} [(@code{const char* str}) @arrow{} @code{uint64_t}] +@fnindex @code{parse_client_id} +@cpindex Client ID, parsing +@cpindex Parsing client ID Convert a client ID string into a client ID integer. @item @code{getenv_nonempty} [(@code{const char* var}) @arrow{} @code{char*}] +@fnindex @code{getenv_nonempty} +@cpindex Environment variables, reading +@cpindex Reading environment variables +@cpindex Fetching environment variables Read an environment variable, return @code{NULL} if the variable's value is an empty string. @item @code{prepare_reexec} [(@code{void}) @arrow{} @code{int}] +@fnindex @code{prepare_reexec} +@cpindex Re-executing servers +@cpindex Updating, online +@cpindex Online updating +@cpindex Version update +@sgindex @code{SIGUSR1} +@sgindex @code{SIGUPDATE} Prepare the server so that it can re-execute into a newer version of the executed file. @@ -5165,6 +5179,13 @@ so it cannot be replaced. Returns zero on success and @code{-1} on error. @item @code{reexec_server} [(@code{int argc, char** argv, int reexeced}) @arrow{} @code{void}] +@fnindex @code{reexec_server} +@cpindex Re-executing servers +@cpindex Updating, online +@cpindex Online updating +@cpindex Version update +@sgindex @code{SIGUSR1} +@sgindex @code{SIGUPDATE} Re-execute the server. If @code{prepare_reexec} failed or has not been called, @code{argv[0]} will be used as a fallback. This functions @@ -5182,6 +5203,10 @@ Whether the server has previously been re-executed This function only returns on failure. @item @code{xsigaction} [(@code{int signo, void (*function)(int signo)}) @arrow{} @code{int}] +@fnindex @code{xsigaction} +@fnindex @code{sigaction} +@fnindex @code{signal} +@cpindex Signals @code{sigaction} with the same parameters as @code{signal}. This function should only be used for common @command{mds} signals and signals that does not require any special settings. @@ -5190,12 +5215,19 @@ on the signal, such as blocking other signals. Returns zero on success and @code{-1} on error. @item @code{send_message} [(@code{int socket, const char* message, size_t length}) @arrow{} @code{size_t}] +@fnindex @code{send_message} +@cpindex Communication over sockets +@cpindex Socket communication Send the message @code{messsage}, of length @code{length} over the socket that is access with the file descriptor @code{socket}. Returns the number of bytes that have been sent, even on error. @item @code{strict_atoi} [(@code{const char* str, int* value, int min, int max}) @arrow{} @code{int}] +@fnindex @code{strict_atoi} +@fnindex @code{atoi} +@cpindex Integer parsing +@cpindex Error management A version of @code{atoi} that is strict about the syntax and bounds. Parses the string @code{str} into an @code{int} and stores it in @code{*value}. If the string is not a @@ -5204,11 +5236,15 @@ and stores it in @code{*value}. If the string is not a returned. @item @code{full_write} [(@code{int fd, const char* buffer, size_t length}) @arrow{} @code{int}] +@fnindex @code{full_write} +@cpindex File writing Send the buffer @code{buffer}, with the length @code{length}, into the file whose file descriptor is @code{fd} and ignores interruptions. Returns zero on success and @code{-1} on error. @item @code{full_read} [(@code{int fd, size_t* length}) @arrow{} @code{char*}] +@fnindex @code{full_read} +@cpindex File reading Read the file whose file descriptor is @code{fd} completely and ignore interruptions. If @code{length} if not @code{NULL}, the length of the read file is stored in @code{*length}. @@ -5216,6 +5252,8 @@ On success, the read content is retured, on error @code{NULL} is returned. @item @code{startswith_n} [(@code{const char*, const char*, size_t, size_t}) @arrow{} @code{int}] +@fnindex @code{startswith_n} +@cpindex String comparison Check whether a string begins with a specific string, where neither of the strings are necessarily NUL-terminated. The parameters are: @@ -5235,12 +5273,19 @@ Returns 1 if @code{haystack} beings with @code{needle}, otherwise zero is returned. @item @code{uninterruptable_waitpid} [(@code{pid_t pid, int* restrict status, int options}) @arrow{} @code{pid_t}] +@fnindex @code{uninterruptable_waitpid} +@fnindex @code{waitpid} +@cpindex Process management Wrapper around @code{waitpid} that never returns on an interruption unless it is interrupted one hundred times within the same clock second. The parameters and return value are exactly those of @code{waitpid}. @item @code{verify_utf8}[(@code{const char* string, int allow_modified_nul}) @arrow{} @code{int}] +@fnindex @code{verify_utf8} +@cpindex Security, encoding, UTF-8 +@cpindex UTF-8, security +@cpindex Encoding, UTF-8, security Checks whether a NUL-terminated string's encoding matches UTF-8. This function will reject the string if it does not use the shorted possible @@ -5258,32 +5303,64 @@ properly formatted, and @code{-1} otherwise. @node Data Structures @section Data Structures -libmdsserver provides a small set of datastructures +@cpindex Data structures +@cpindex Marshalling +@cpindex Serialisation +@cpindex Re-executing servers +@cpindex Updating, online +@cpindex Online updating +@cpindex Version update +@sgindex @code{SIGUSR1} +@sgindex @code{SIGUPDATE} +libmdsserver provides a small set of data structures that are used by the @command{mds} servers. All of these are written with marshal-functionallity. @table @asis @item @code{client_list_t} @{also known as @code{struct client_list}@} +@tpindex @code{client_list_t} +@tpindex @code{struct client_list} +@cpindex Client ID, lists +@cpindex Lists of client ID:s In the header file @file{<libmdsserver/client-list.h>}, libmdsserver defines a dynamic list for storing client ID:s. @item @code{linked_list_t} @{also known as @code{struct linked_list}@} +@tpindex @code{linked_list_t} +@tpindex @code{struct linked_list} +@cpindex Lists, linked +@cpindex Linked lists In the header file @file{<libmdsserver/linked-list.h>}, libmdsserver defines a linear array sentinel doubly linked list. @item @code{hash_table_t} @{also known as @code{struct hash_table}@} +@tpindex @code{hash_table_t} +@tpindex @code{struct hash_table} +@cpindex Tables, hash +@cpindex Maps, hash +@cpindex Dictionary, hash +@cpindex Hash table In the header file @file{<libmdsserver/hash-table.h>}, libmdsserver defines a hash table. @item @code{fd_table_t} @{also known as @code{struct fd_table}@} +@tpindex @code{fd_table_t} +@tpindex @code{struct fd_table} +@cpindex Tables, file descriptor +@cpindex Maps, file descriptor +@cpindex Dictionary, file descriptor +@cpindex File descriptor table In the header file @file{<libmdsserver/fd-table.h>}, libmdsserver defines a lookup table for small positive integer keys, intended as an alternative to hash tables for file descriptors as keys. @item @code{mds_message_t} @{also known as @code{struct mds_message}@} +@tpindex @code{mds_message_t} +@tpindex @code{struct mds_message} +@cpindex Message passing, data structure In the header file @file{<libmdsserver/mds-message.h>}, libmdsserver defines a data structure for message between the server or client and the master server, @@ -5298,6 +5375,12 @@ as an example. @table @asis @item @code{X_destroy} [(@code{X_t* restrict this}) @arrow{} @code{void}] +@fnindex @code{client_list_destroy} +@fnindex @code{linked_list_destroy} +@fnindex @code{hash_table_destroy} +@fnindex @code{fd_table_destroy} +@fnindex @code{mds_message_destroy} +@cpindex Memory management Releases all resouces in @code{*this}, @code{this} itself is however not @code{free}:d. @@ -5305,22 +5388,67 @@ However, @code{hash_table_destory} and @code{fd_table_destory} have another signature. @item @code{X_clone} [(@code{const X_t* restrict this, X_t* restrict out}) @arrow{} @code{int}] +@fnindex @code{client_list_clone} +@fnindex @code{linked_list_clone} +@fnindex @code{hash_table_clone} +@fnindex @code{fd_table_clone} +@fnindex @code{mds_message_clone} +@cpindex Memory management Create a deep duplicate of @code{*this} and store it in @code{*out}. @item @code{X_marshal_size} [(@code{const X_t* restrict this}) @arrow{} @code{size_t}] +@fnindex @code{client_list_marshal_size} +@fnindex @code{linked_list_marshal_size} +@fnindex @code{hash_table_marshal_size} +@fnindex @code{fd_table_marshal_size} +@fnindex @code{mds_message_marshal_size} +@cpindex Marshalling +@cpindex Serialisation +@cpindex Re-executing servers +@cpindex Updating, online +@cpindex Online updating +@cpindex Version update +@sgindex @code{SIGUSR1} +@sgindex @code{SIGUPDATE} Calculates the exact allocate size needed for the parameter @code{data} in the function @code{X_marshal} if called with the same @code{this} parameter. @item @code{X_marshal} [(@code{const X_t* restrict this, char* restrict data}) @arrow{} @code{void}] +@fnindex @code{client_list_marshal} +@fnindex @code{linked_list_marshal} +@fnindex @code{hash_table_marshal} +@fnindex @code{fd_table_marshal} +@fnindex @code{mds_message_marshal} +@cpindex Marshalling +@cpindex Serialisation +@cpindex Re-executing servers +@cpindex Updating, online +@cpindex Online updating +@cpindex Version update +@sgindex @code{SIGUSR1} +@sgindex @code{SIGUPDATE} Marshal the state of @code{*this} into @code{data}. The number of bytes that will be stored (contiguously) in @code{data} can be calculated with @code{X_marshal_size}. @item @code{X_unmarshal} [(@code{X_t* restrict this, char* restrict data)}) @arrow{} @code{int}] +@fnindex @code{client_list_unmarshal} +@fnindex @code{linked_list_unmarshal} +@fnindex @code{hash_table_unmarshal} +@fnindex @code{fd_table_unmarshal} +@fnindex @code{mds_message_unmarshal} +@cpindex Marshalling +@cpindex Serialisation +@cpindex Re-executing servers +@cpindex Updating, online +@cpindex Online updating +@cpindex Version update +@sgindex @code{SIGUSR1} +@sgindex @code{SIGUPDATE} Unmarshal a @code{X_t} from @code{data} into @code{*this}. Returns zero on success and @code{-1} on error. |