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What is exec used for?
The exec command is a powerful tool for manipulating file-descriptors (FD), creating output and error logging within scripts with a minimal change. In Linux, by default, file descriptor 0 is stdin (the standard input), 1 is stdout (the standard output), and 2 is stderr (the standard error).
What does exec function do in C?
The exec family of functions replaces the current running process with a new process. It can be used to run a C program by using another C program. It comes under the header file unistd.
What causes exec to fail?
A command may fail to be queued, so there may be an error before EXEC is called. A command may fail after EXEC is called, for instance since we performed an operation against a key with the wrong value (like calling a list operation against a string value).
What does exec do in an Unix shell?
Execute Shell Script Using File Name Use the shell script file name to execute it either by using it’s relative path or absolute path as shown below.
What is the opposite of exec?
Antonyms for exec include employee, worker, follower, underling, subordinate, junior, staff, representative, retainer and personnel. Find more opposite words at
What does an exec command do in SQL?
The EXEC command is used to execute a stored procedure , or a SQL string passed to it. You can also use full command EXECUTE which is the same as EXEC. Following is the basic syntax of EXEC command in SQL Server.
What exactly is ‘EXEC shell’?
The exec shell is usually associated with the console and the vty ports and enables the parser and the command interpreter to allow the user to issue commands and receive output. You authenticate to user mode.