mirror of https://github.com/GnoConsortium/gno.git
66 lines
1.5 KiB
Groff
66 lines
1.5 KiB
Groff
.\" This man page was written to conform with the lenviron v1.1.3
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.\" release for Gno v2.0.3 and later by Devin Reade.
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.\"
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.\" $Id: buildPath.3,v 1.1 1997/02/27 07:32:21 gdr Exp $
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.\"
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.TH BUILDPATH 3 "30 January 1997" GNO "Library Routines"
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.SH NAME
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buildPath - search PATH and return the full path name of an executable file
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.SH SYNOPSIS
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#include <gno/gno.h>
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.sp 1
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char *\fBbuildPath\fR (const char *\fIfile\fR);
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.SH DESCRIPTION
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.BR buildPath
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searches the directories listed in the
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.BR PATH
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environment variable for
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.IR file .
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.LP
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If
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.IR file
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resides within
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.BR PATH ,
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then
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.BR buildPath
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constructs a string with
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.BR malloc (3)
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which contains the full pathname of the file. If
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.IR file
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itself specifies a fully qualified pathname, then the constructed
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string will be a copy of
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.IR file ,
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and no test for existence will be done.
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.LP
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If PATH is not set or is the empty string, then
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.BR buildPath
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will default to searching
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.BR bin
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then
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.BR /usr/bin .
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.SH RETURN VALUES
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On success, the constructed string is returned. On error, NULL is
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returned and
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.BR errno
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is set.
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.SH CAVEATS
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The current version of
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.BR gsh
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parse the PATH variable backwards, so for compatibility
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.BR buildPath
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will currently also search PATH backwards.
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.SH HISTORY
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This routine was originally called
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.BR build_path
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and was part of the
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.BR lenviron
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library written by Devin Reade for GNO v2.0.3 in April 1994.
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It was incorporated into the GNO
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.BR libc
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as of v2.0.6.
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.SH SEE ALSO
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.BR buildCmd (3),
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.BR buildEnv (3),
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.BR isRootPath (3),
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.BR environ (7).
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