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Diffstat (limited to '')
| -rw-r--r-- | mysys/mf_path.c | 120 |
1 files changed, 120 insertions, 0 deletions
diff --git a/mysys/mf_path.c b/mysys/mf_path.c new file mode 100644 index 00000000..cba80599 --- /dev/null +++ b/mysys/mf_path.c @@ -0,0 +1,120 @@ +/* Copyright (c) 2000, 2010, Oracle and/or its affiliates. All rights reserved. + + This program is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; version 2 of the License. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program; if not, write to the Free Software + Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1335 USA */ + +#include "mysys_priv.h" +#include <m_string.h> + +static char *find_file_in_path(char *to,const char *name); + + /* Finds where program can find it's files. + pre_pathname is found by first locking at progname (argv[0]). + if progname contains path the path is returned. + else if progname is found in path, return it + else if progname is given and POSIX environment variable "_" is set + then path is taken from "_". + If filename doesn't contain a path append MY_BASEDIR_VERSION or + MY_BASEDIR if defined, else append "/my/running". + own_path_name_part is concatinated to result. + my_path puts result in to and returns to */ + +char * my_path(char * to, const char *progname, + const char *own_pathname_part) +{ + char *start, *end, *prog; + size_t to_length; + DBUG_ENTER("my_path"); + + start=to; /* Return this */ + if (progname && (dirname_part(to, progname, &to_length) || + find_file_in_path(to,progname) || + ((prog=getenv("_")) != 0 && + dirname_part(to, prog, &to_length)))) + { + (void) intern_filename(to,to); + if (!test_if_hard_path(to)) + { + if (!my_getwd(curr_dir,FN_REFLEN,MYF(0))) + bchange((uchar*) to, 0, (uchar*) curr_dir, strlen(curr_dir), strlen(to)+1); + } + } + else + { + if ((end = getenv("MY_BASEDIR_VERSION")) == 0 && + (end = getenv("MY_BASEDIR")) == 0) + { +#ifdef DEFAULT_BASEDIR + end= (char*) DEFAULT_BASEDIR; +#else + end= (char*) "/my/"; +#endif + } + (void) intern_filename(to,end); + to=strend(to); + if (to != start && to[-1] != FN_LIBCHAR) + *to++ = FN_LIBCHAR; + (void) strmov(to,own_pathname_part); + } + DBUG_PRINT("exit",("to: '%s'",start)); + DBUG_RETURN(start); +} /* my_path */ + + + /* test if file without filename is found in path */ + /* Returns to if found and to has dirpart if found, else NullS */ + +#if defined(_WIN32) +#define F_OK 0 +#define PATH_SEP ';' +#define PROGRAM_EXTENSION ".exe" +#else +#define PATH_SEP ':' +#endif + +static char *find_file_in_path(char *to, const char *name) +{ + char *path,*pos,dir[2]; + const char *ext=""; + + if (!(path=getenv("PATH"))) + return NullS; + dir[0]=FN_LIBCHAR; dir[1]=0; +#ifdef PROGRAM_EXTENSION + if (!fn_ext(name)[0]) + ext=PROGRAM_EXTENSION; +#endif + + for (pos=path ; (pos=strchr(pos,PATH_SEP)) ; path= ++pos) + { + if (path != pos) + { + strxmov(strnmov(to,path,(uint) (pos-path)),dir,name,ext,NullS); + if (!access(to,F_OK)) + { + to[(uint) (pos-path)+1]=0; /* Return path only */ + return to; + } + } + } +#ifdef _WIN32 + to[0]=FN_CURLIB; + strxmov(to+1,dir,name,ext,NullS); + if (!access(to,F_OK)) /* Test in current dir */ + { + to[2]=0; /* Leave ".\" */ + return to; + } +#endif + return NullS; /* File not found */ +} |