Bash Read Invalid File Descriptor Specification at Karen Strickland blog

Bash Read Invalid File Descriptor Specification. The accepted answer is correct, but as of bash 4.1, you can use automatic file descriptor allocation, and in that case you don't need eval:. Add a sleep 1 before the loop, and you will see (read: In linux, there are three types of file descriptors that are commonly used by programs and commands: Bash supports the following syntax to open file for both reading and writing on file descriptor: Standard input (stdin), standard output (stdout), and standard error (stderr). In the bash manual, opening an arbitrary file descriptor is described as: This is useful to read file line by line. File descriptor 0 is used if fd is. /dev/fd/fd if fd is a valid integer, file descriptor fd is duplicated. Stay away from coproc , it's a trap for the uninitiated. #!/bin/bash filename=my_file.txt exec {fd}<${filename} # open file for read, assign descriptor echo opened ${filename}. Because you can only read lines from a stream once.

Standard input (stdin), standard output (stdout), and standard error (stderr). Bash supports the following syntax to open file for both reading and writing on file descriptor: In the bash manual, opening an arbitrary file descriptor is described as: The accepted answer is correct, but as of bash 4.1, you can use automatic file descriptor allocation, and in that case you don't need eval:. /dev/fd/fd if fd is a valid integer, file descriptor fd is duplicated. Add a sleep 1 before the loop, and you will see (read: #!/bin/bash filename=my_file.txt exec {fd}<${filename} # open file for read, assign descriptor echo opened ${filename}. In linux, there are three types of file descriptors that are commonly used by programs and commands: Because you can only read lines from a stream once. This is useful to read file line by line.

Invalid proto descriptor for file "" Missing field

Bash Read Invalid File Descriptor Specification In linux, there are three types of file descriptors that are commonly used by programs and commands: Stay away from coproc , it's a trap for the uninitiated. #!/bin/bash filename=my_file.txt exec {fd}<${filename} # open file for read, assign descriptor echo opened ${filename}. /dev/fd/fd if fd is a valid integer, file descriptor fd is duplicated. File descriptor 0 is used if fd is. Standard input (stdin), standard output (stdout), and standard error (stderr). The accepted answer is correct, but as of bash 4.1, you can use automatic file descriptor allocation, and in that case you don't need eval:. Because you can only read lines from a stream once. In linux, there are three types of file descriptors that are commonly used by programs and commands: Add a sleep 1 before the loop, and you will see (read: Bash supports the following syntax to open file for both reading and writing on file descriptor: In the bash manual, opening an arbitrary file descriptor is described as: This is useful to read file line by line.