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Full Discussion: Learning Perl
Top Forums Shell Programming and Scripting Learning Perl Post 302473506 by majid.merkava on Saturday 20th of November 2010 07:57:07 PM
Old 11-20-2010
This program opens file named "./testfile2" for writing.
five times it writes: "Output 1 \n" to this file. Note that it doesn't append to it because of this: ">" it wipes all data and then writes to it. if you want to append to it use: ">>".
The last three lines are trivial.
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puts(3S)																  puts(3S)

NAME
puts(), fputs() - put a string on a stream SYNOPSIS
Obsolescent Interfaces DESCRIPTION
writes the null-terminated string pointed to by s, followed by a new-line character, to the standard output stream writes the null-terminated string pointed to by s to the named output stream, but does append a new-line character. Neither function writes the terminating null character. Notes and append a new-line character; and do not. Obsolescent Interfaces and put a string on a stream. RETURN VALUE
Upon successful completion, these routines return a non-negative number. Otherwise they return EOF, set the error indicator for the stream, and set to indicate the error. ERRORS
These routines fail if, either the stream is unbuffered or stream's buffer needed to be flushed causing an underlying call to be invoked, and: The flag is set for the file descriptor underlying stream and the process would be delayed in the write operation. The file descriptor underlying stream is not a valid file descriptor open for writing. An attempt was made to write to a file that exceeds the process's file size limit or the maximum file size (see ulimit(2)). A signal was caught during the system call. [EIO] The process is in a background process group and is attempting to write to its controlling terminal, is set, the process is neither ignoring nor blocking the signal, and the process group of the process is orphaned. There was no free space remaining on the device containing the file. An attempt is made to write to a pipe or FIFO that is not open for reading by any process. A signal is also sent to the process. Additional values may be set by the underlying function (see write(2)). WARNINGS
and are obsolescent interfaces supported only for compatibility with existing DCE applications. New multithreaded applications should use and SEE ALSO
ferror(3S), flockfile(3S), fopen(3S), fread(3S), printf(3S), putc(3S), orientation(5), thread_safety(5), glossary(9). STANDARDS CONFORMANCE
puts(3S)
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