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+.\" Copyright (c) 2001-2003 The Open Group, All Rights Reserved 
+.TH "ATOI" P 2003 "IEEE/The Open Group" "POSIX Programmer's Manual"
+.\" atoi 
+.SH NAME
+atoi \- convert a string to an integer
+.SH SYNOPSIS
+.LP
+\fB#include <stdlib.h>
+.br
+.sp
+int atoi(const char *\fP\fIstr\fP\fB);
+.br
+\fP
+.SH DESCRIPTION
+.LP
+The call \fIatoi\fP(\fIstr\fP) shall be equivalent to:
+.sp
+.RS
+.nf
+
+\fB(int) strtol(str, (char **)NULL, 10)
+\fP
+.fi
+.RE
+.LP
+except that the handling of errors may differ. If the value cannot
+be represented, the behavior is undefined.
+.SH RETURN VALUE
+.LP
+The \fIatoi\fP() function shall return the converted value if the
+value can be represented.
+.SH ERRORS
+.LP
+No errors are defined.
+.LP
+\fIThe following sections are informative.\fP
+.SH EXAMPLES
+.SS Converting an Argument
+.LP
+The following example checks for proper usage of the program. If there
+is an argument and the decimal conversion of this
+argument (obtained using \fIatoi\fP()) is greater than 0, then the
+program has a valid number of minutes to wait for an event.
+.sp
+.RS
+.nf
+
+\fB#include <stdlib.h>
+#include <stdio.h>
+\&...
+int minutes_to_event;
+\&...
+if (argc < 2 || ((minutes_to_event = atoi (argv[1]))) <= 0) {
+   fprintf(stderr, "Usage: %s minutes\\n", argv[0]); exit(1);
+}
+\&...
+\fP
+.fi
+.RE
+.SH APPLICATION USAGE
+.LP
+The \fIatoi\fP() function is subsumed by \fIstrtol\fP() but is retained
+because it is
+used extensively in existing code. If the number is not known to be
+in range, \fIstrtol\fP() should be used because \fIatoi\fP() is not
+required to perform any error
+checking.
+.SH RATIONALE
+.LP
+None.
+.SH FUTURE DIRECTIONS
+.LP
+None.
+.SH SEE ALSO
+.LP
+\fIstrtol\fP() , the Base Definitions volume of IEEE\ Std\ 1003.1-2001,
+\fI<stdlib.h>\fP
+.SH COPYRIGHT
+Portions of this text are reprinted and reproduced in electronic form
+from IEEE Std 1003.1, 2003 Edition, Standard for Information Technology
+-- Portable Operating System Interface (POSIX), The Open Group Base
+Specifications Issue 6, Copyright (C) 2001-2003 by the Institute of
+Electrical and Electronics Engineers, Inc and The Open Group. In the
+event of any discrepancy between this version and the original IEEE and
+The Open Group Standard, the original IEEE and The Open Group Standard
+is the referee document. The original Standard can be obtained online at
+http://www.opengroup.org/unix/online.html .