1/* Perform tilde expansion on paths for GDB and gdbserver. 2 3 Copyright (C) 2017-2020 Free Software Foundation, Inc. 4 5 This file is part of GDB. 6 7 This program is free software; you can redistribute it and/or modify 8 it under the terms of the GNU General Public License as published by 9 the Free Software Foundation; either version 3 of the License, or 10 (at your option) any later version. 11 12 This program is distributed in the hope that it will be useful, 13 but WITHOUT ANY WARRANTY; without even the implied warranty of 14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 15 GNU General Public License for more details. 16 17 You should have received a copy of the GNU General Public License 18 along with this program. If not, see <http://www.gnu.org/licenses/>. */ 19 20#include "common-defs.h" 21#include "gdb_tilde_expand.h" 22#include <glob.h> 23 24/* RAII-style class wrapping "glob". */ 25 26class gdb_glob 27{ 28public: 29 /* Construct a "gdb_glob" object by calling "glob" with the provided 30 parameters. This function can throw if "glob" fails. */ 31 gdb_glob (const char *pattern, int flags, 32 int (*errfunc) (const char *epath, int eerrno)) 33 { 34 int ret = glob (pattern, flags, errfunc, &m_glob); 35 36 if (ret != 0) 37 { 38 if (ret == GLOB_NOMATCH) 39 error (_("Could not find a match for '%s'."), pattern); 40 else 41 error (_("glob could not process pattern '%s'."), 42 pattern); 43 } 44 } 45 46 /* Destroy the object and free M_GLOB. */ 47 ~gdb_glob () 48 { 49 globfree (&m_glob); 50 } 51 52 /* Return the GL_PATHC component of M_GLOB. */ 53 int pathc () const 54 { 55 return m_glob.gl_pathc; 56 } 57 58 /* Return the GL_PATHV component of M_GLOB. */ 59 char **pathv () const 60 { 61 return m_glob.gl_pathv; 62 } 63 64private: 65 /* The actual glob object we're dealing with. */ 66 glob_t m_glob; 67}; 68 69/* See gdbsupport/gdb_tilde_expand.h. */ 70 71std::string 72gdb_tilde_expand (const char *dir) 73{ 74 gdb_glob glob (dir, GLOB_TILDE_CHECK, NULL); 75 76 gdb_assert (glob.pathc () > 0); 77 /* "glob" may return more than one match to the path provided by the 78 user, but we are only interested in the first match. */ 79 std::string expanded_dir = glob.pathv ()[0]; 80 81 return expanded_dir; 82} 83 84/* See gdbsupport/gdb_tilde_expand.h. */ 85 86gdb::unique_xmalloc_ptr<char> 87gdb_tilde_expand_up (const char *dir) 88{ 89 gdb_glob glob (dir, GLOB_TILDE_CHECK, NULL); 90 91 gdb_assert (glob.pathc () > 0); 92 /* "glob" may return more than one match to the path provided by the 93 user, but we are only interested in the first match. */ 94 return make_unique_xstrdup (glob.pathv ()[0]); 95} 96