| 1 | /* Perform tilde expansion on paths for GDB and gdbserver. |
| 2 | |
| 3 | Copyright (C) 2017-2019 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 | |
| 26 | class gdb_glob |
| 27 | { |
| 28 | public: |
| 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 | |
| 64 | private: |
| 65 | /* The actual glob object we're dealing with. */ |
| 66 | glob_t m_glob; |
| 67 | }; |
| 68 | |
| 69 | /* See common/gdb_tilde_expand.h. */ |
| 70 | |
| 71 | std::string |
| 72 | gdb_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 common/gdb_tilde_expand.h. */ |
| 85 | |
| 86 | gdb::unique_xmalloc_ptr<char> |
| 87 | gdb_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 | } |