How to write an output file into a specific directory in Linux?
in [Fortran]
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From: hermitian on 24 Jan 2008 09:57 Hi, everyone: I can write an output file in the current working directory in Linux. For example: program ex implicit none open(unit=10,file="ex.txt") write(10,*) "Hello!" close(10) stop end But how can I write the file "ex.txt" directly to a specific directory in Linux or other *nix environment, i.e. $HOME or /tmp et al. Moreover, is there any self-teaching resources on Fortran programing in *nix environment? For example, how to handle bash and other unix utilities with Fortran and some special I/O syntax in *nix. Thanks
From: fj on 24 Jan 2008 14:49 On 24 jan, 15:57, hermitian <iamwu...(a)gmail.com> wrote: > Hi, everyone: > > I can write an output file in the current working directory in Linux. > For example: > > program ex > implicit none > open(unit=10,file="ex.txt") > write(10,*) "Hello!" > close(10) > stop > end > > But how can I write the file "ex.txt" directly to a specific directory > in Linux or other *nix environment, i.e. $HOME or /tmp et al. > > Moreover, is there any self-teaching resources on Fortran programing > in *nix environment? > For example, how to handle bash and other unix utilities with Fortran > and some special I/O syntax in *nix. > > Thanks Easily : open(unit=10,file="/tmp/ex.txt") If you want to use environment variables like $HOME, this is a little bit more difficult. You need to get the value of the environment variable first : CHARACTER(255) :: home CALL get_environment_variable('HOME',home) OPEN(unit=10,file=TRIM(home)//"/ex.txt") .... If the routine get_environment_variable (F2003) is not available, you can try getenv instead.
From: Hani on 25 Jan 2008 16:09
hermitian wrote: > Hi, everyone: > > I can write an output file in the current working directory in Linux. > For example: > > program ex > implicit none > open(unit=10,file="ex.txt") > write(10,*) "Hello!" > close(10) > stop > end > > But how can I write the file "ex.txt" directly to a specific directory > in Linux or other *nix environment, i.e. $HOME or /tmp et al. Command-line redirection could be an alternative. Write to Stdout (standard output: unit=*) and use command-line-redirection of the bash shell, e.g.: $ ./ex >/home/id/ex.txt ">" writes the output which is generally printed to the console (Stdout) to the file ex.txt in /home/id. With ">>" insted of ">" you append the output to an exiting file. With "<" you can read from Stdin (standard input),e g. $ prog <inputfile >outputfile This works with all programs which write/read from/to Stdin/Stdout. I like this way to do input/output because I do not need to implement real file in-/output routines in my programs. The OS do it for you and there are so many other advantages, like piping, redirection to printers or other devices, ... .... and command-line redirection works in Windows, too. > Moreover, is there any self-teaching resources on Fortran programing > in *nix environment? > For example, how to handle bash and other unix utilities with Fortran > and some special I/O syntax in *nix. You need a bash tutorial. I can not recommend a web address at the moment. Maybe others can do. Hani |