...an epoll instance twice? You will probably get EEXIST . However, it is possible to add a duplicate ( dup (2), dup2 (2), fcntl (2) F_DUPFD ) file descriptor to the same epoll ins…...gc (1). Storing multiple repositories as namespaces of a single repository avoids storing duplicate copies of the same objects, such as when storing multiple branches of the sam…...speed (3) chdir (2) chmod (2) chown (2) clock_gettime (2) close (2) connect (2) creat (2) dup (2) dup2 (2) execl (3) Added in POSIX.1-2008; see notes below execle (3) See notes …...LANGUAGE plpgsql; Return a record containing multiple output parameters: CREATE FUNCTION dup(in int, out f1 int, out f2 text) AS $$ SELECT $1, CAST($1 AS text) || ' is text' $$ …...for each selected row or row group. (See SELECT List below.) 6.SELECT DISTINCT eliminates duplicate rows from the result. SELECT DISTINCT ON eliminates rows that match on all th…...char *strncat(char *restrict dst , const char src [restrict . ssize ], size_t ssize ); // Duplicate a null-padded character sequence into a string. char *strndup(const char src …...that uses pipe (2) and fork (2) should use suitable close (2) calls to close unnecessary duplicate file descriptors; this ensures that end-of-file and SIGPIPE / EPIPE are delive…...r communication using git’s native packfile protocol. This requires a bidirectional, full-duplex connection. Supported commands: connect . stateless-connect Experimental; for in…...ferent file descriptor number will be used. Semantically, this operation is equivalent to duplicating ( dup (2)) a file descriptor into the file descriptor table of another proc…...unsigned decimal integer, always followed by '}'. The integers must lie between 0 and RE_DUP_MAX (255(!)) inclusive, and if there are two of them, the first may not exceed the s…...unsigned decimal integer, always followed by '}'. The integers must lie between 0 and RE_DUP_MAX (255(!)) inclusive, and if there are two of them, the first may not exceed the s…...w functions for creating and manipulating locale objects ( newlocale (3), freelocale (3), duplocale (3), and uselocale (3)) and various new library functions with the suffix "_l…...2001 with the NewReno and SACK extensions. It provides a reliable, stream-oriented, full-duplex connection between two sockets on top of ip (7), for both v4 and v6 versions. TCP…...it contains named objects (tables, data types, functions, and operators) whose names can duplicate those of other objects existing in other schemas. Named objects are accessed e…...lements a connectionless, unreliable datagram packet service. Packets may be reordered or duplicated before they arrive. UDP generates and checks checksums to catch transmission…...ce table, followed by all columns from the target table. Often this will lead to a lot of duplication, since it is common for the source and target tables to have a lot of the s…...tions will never get folded into one notification. Except for dropping later instances of duplicate notifications, NOTIFY guarantees that notifications from the same transaction…...; so the trigger should not fire a second time on the replica, because that would lead to duplication. However, if a trigger is used for another purpose such as creating externa…...e function immutable when you create it. PARAMETERS UNIQUE Causes the system to check for duplicate values in the table when the index is created (if data already exist) and eac…...e other options. close (2) is used to close a socket. shutdown (2) closes parts of a full-duplex socket connection. Seeking, or calling pread (2) or pwrite (2) with a nonzero po…