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| author | Tobias Klauser <tklauser@distanz.ch> | 2008-01-27 11:37:44 +0100 |
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| committer | Tobias Klauser <tklauser@xenon.tklauser.home> | 2008-01-27 11:37:44 +0100 |
| commit | 7e0f021a9aec35fd8e6725e87e3313b101d26f5e (patch) | |
| tree | b1cacc4b24393f517aeb4610e9e1021f954307a8 /reference/C/FUNCTIONS/popen.html | |
Initial import (2.0.2-6)2.0.2-6
Diffstat (limited to 'reference/C/FUNCTIONS/popen.html')
| -rw-r--r-- | reference/C/FUNCTIONS/popen.html | 88 |
1 files changed, 88 insertions, 0 deletions
diff --git a/reference/C/FUNCTIONS/popen.html b/reference/C/FUNCTIONS/popen.html new file mode 100644 index 0000000..ac93bec --- /dev/null +++ b/reference/C/FUNCTIONS/popen.html @@ -0,0 +1,88 @@ +<title>popen function</title> + +<head> +<script language="JavaScript"> +</script> +</head> + +<body bgcolor=#ffffcc> +<hr> +<center> +<h1>popen function</h1> +</center> +<hr> +<p> +<b>popen</b> is used to read and write to a unix pipe.<p> This function is NOT +included in 'C Programming Language' (ANSI) but can be found in 'The Standard +C Library' book. + +<pre> +Library: stdio.h + +Prototype: FILE *popen(const char *command, const char *type); + +Syntax: FILE *fp; + fp = popen( "ls -l", "r"); + +Notes: + command - is the command to be issued. + type - r - read O/P from command. + - w - Write data as I/P to command. + +</pre> +<hr> +<h2>Examples:</h2> +<img src=../../GRAPHICS/computer.gif></a> +<a href=../EXAMPLES/popen.c> example program.</a><p> + +<hr> +<h2>Notes:</h2> +<ul> +<li>popen will always execute the command from within the Bourne shell. +<li>popen feeds the STDOUT back to your program. If you want STDERR, +the following will do the trick. +<pre> + fp=popen("ls -l 2>&1", "w"); + AAAA + |||| +</pre> +</ul> +<hr> +<h2>See Also:</h2> +<ul> +<li><a href=fgetc.html>fgetc</a> Get a character from a file. +<li><a href=files.html>fputc</a> Put a character into a file.<i>man pages</i> +<li><a href=fprintf.html>fprintf</a> Put a formatted line into a file. +<li><a href=fopen.html>fopen</a> Open a file. +<li><a href=fclose.html>fclose</a> Close a file. +<li><a href=pclose.html>pclose</a> Close a pipe. +<li><a href=system.html>system</a> Open a pipe. +</ul> + + +<p> + +<hr> +<p> +<center> +<table border=2 width="80%" bgcolor="ivory"> +<tr align=center> +<td width="25%"> +<a href="../cref.html"> Top</a> +</td><td width="25%"> +<a href="../master_index.html"> Master Index</a> +</td><td width="25%"> +<a href="../SYNTAX/keywords.html"> Keywords</a> +</td><td width="25%"> +<a href="funcref.htm"> Functions</a> +</td> +</tr> +</table> +</center> +<p> +<hr> +<address>Martin Leslie +</address><p> +</body> +</html> + |