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107 lines
2.8 KiB
C
107 lines
2.8 KiB
C
/* Copyright Abandoned 1996 TCX DataKonsult AB & Monty Program KB & Detron HB
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This file is public domain and comes with NO WARRANTY of any kind */
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#include "mysys_priv.h"
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#include <m_string.h>
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static char *find_file_in_path(char *to,const char *name);
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/* Finds where program can find it's files.
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pre_pathname is found by first locking at progname (argv[0]).
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if progname contains path the path is returned.
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else if progname is found in path, return it
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else if progname is given and POSIX environment variable "_" is set
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then path is taken from "_".
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If filename doesn't contain a path append MY_BASEDIR_VERSION or
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MY_BASEDIR if defined, else append "/my/running".
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own_path_name_part is concatinated to result.
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my_path puts result in to and returns to */
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my_string my_path(my_string to, const char *progname,
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const char *own_pathname_part)
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{
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my_string start,end,prog;
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DBUG_ENTER("my_path");
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start=to; /* Return this */
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if (progname && (dirname_part(to, progname) ||
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find_file_in_path(to,progname) ||
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((prog=getenv("_")) != 0 && dirname_part(to,prog))))
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{
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VOID(intern_filename(to,to));
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if (!test_if_hard_path(to))
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{
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if (!my_getwd(curr_dir,FN_REFLEN,MYF(0)))
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bchange(to,0,curr_dir,strlen(curr_dir),strlen(to)+1);
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}
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}
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else
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{
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if ((end = getenv("MY_BASEDIR_VERSION")) == 0 &&
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(end = getenv("MY_BASEDIR")) == 0)
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{
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#ifdef DEFAULT_BASEDIR
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end= (char*) DEFAULT_BASEDIR;
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#else
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end= (char*) "/my/";
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#endif
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}
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VOID(intern_filename(to,end));
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to=strend(to);
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if (to != start && to[-1] != FN_LIBCHAR)
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*to++ = FN_LIBCHAR;
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VOID(strmov(to,own_pathname_part));
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}
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DBUG_PRINT("exit",("to: '%s'",start));
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DBUG_RETURN(start);
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} /* my_path */
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/* test if file without filename is found in path */
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/* Returns to if found and to has dirpart if found, else NullS */
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#if defined(MSDOS) || defined(__WIN32__)
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#define F_OK 0
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#define PATH_SEP ';'
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#define PROGRAM_EXTENSION ".exe"
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#else
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#define PATH_SEP ':'
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#endif
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static char *find_file_in_path(char *to, const char *name)
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{
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char *path,*pos,dir[2];
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const char *ext="";
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if (!(path=getenv("PATH")))
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return NullS;
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dir[0]=FN_LIBCHAR; dir[1]=0;
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#ifdef PROGRAM_EXTENSION
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if (!fn_ext(name)[0])
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ext=PROGRAM_EXTENSION;
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#endif
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for (pos=path ; (pos=strchr(pos,PATH_SEP)) ; path= ++pos)
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{
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if (path != pos)
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{
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strxmov(strnmov(to,path,(uint) (pos-path)),dir,name,ext,NullS);
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if (!access(to,F_OK))
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{
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to[(uint) (pos-path)+1]=0; /* Return path only */
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return to;
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}
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}
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}
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#ifdef __WIN32__
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to[0]=FN_CURLIB;
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strxmov(to+1,dir,name,ext,NullS);
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if (!access(to,F_OK)) /* Test in current dir */
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{
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to[2]=0; /* Leave ".\" */
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return to;
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}
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#endif
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return NullS; /* File not found */
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}
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