1 /* Low-level file-handling.
2 Copyright (C) 2012-2018 Free Software Foundation, Inc.
4 This file is part of GDB.
6 This program is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 3 of the License, or
9 (at your option) any later version.
11 This program is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with this program. If not, see <http://www.gnu.org/licenses/>. */
24 /* Note all the file descriptors which are open when this is called.
25 These file descriptors will not be closed by close_most_fds. */
27 extern void notice_open_fds (void);
29 /* Mark a file descriptor as inheritable across an exec. */
31 extern void mark_fd_no_cloexec (int fd
);
33 /* Mark a file descriptor as no longer being inheritable across an
34 exec. This is only meaningful when FD was previously passed to
35 mark_fd_no_cloexec. */
37 extern void unmark_fd_no_cloexec (int fd
);
39 /* Close all open file descriptors other than those marked by
40 'notice_open_fds', and stdin, stdout, and stderr. Errors that
41 occur while closing are ignored. */
43 extern void close_most_fds (void);
45 /* Like 'open', but ensures that the returned file descriptor has the
46 close-on-exec flag set. */
48 extern int gdb_open_cloexec (const char *filename
, int flags
,
49 /* mode_t */ unsigned long mode
);
51 /* Convenience wrapper for the above, which takes the filename as an
55 gdb_open_cloexec (const std::string
&filename
, int flags
,
56 /* mode_t */ unsigned long mode
)
58 return gdb_open_cloexec (filename
.c_str (), flags
, mode
);
61 struct gdb_file_deleter
63 void operator() (FILE *file
) const
69 /* A unique pointer to a FILE. */
71 typedef std::unique_ptr
<FILE, gdb_file_deleter
> gdb_file_up
;
73 /* Like 'fopen', but ensures that the returned file descriptor has the
74 close-on-exec flag set. */
76 extern gdb_file_up
gdb_fopen_cloexec (const char *filename
,
77 const char *opentype
);
79 /* Convenience wrapper for the above, which takes the filename as an
82 static inline gdb_file_up
83 gdb_fopen_cloexec (const std::string
&filename
, const char *opentype
)
85 return gdb_fopen_cloexec (filename
.c_str (), opentype
);
88 /* Like 'socketpair', but ensures that the returned file descriptors
89 have the close-on-exec flag set. */
91 extern int gdb_socketpair_cloexec (int domain
, int style
, int protocol
,
94 /* Like 'socket', but ensures that the returned file descriptor has
95 the close-on-exec flag set. */
97 extern int gdb_socket_cloexec (int domain
, int style
, int protocol
);
99 /* Like 'pipe', but ensures that the returned file descriptors have
100 the close-on-exec flag set. */
102 extern int gdb_pipe_cloexec (int filedes
[2]);
104 /* Return a new cleanup that closes FD. */
106 extern struct cleanup
*make_cleanup_close (int fd
);
108 struct gdb_dir_deleter
110 void operator() (DIR *dir
) const
116 /* A unique pointer to a DIR. */
118 typedef std::unique_ptr
<DIR, gdb_dir_deleter
> gdb_dir_up
;
120 /* Return true if the file NAME exists and is a regular file.
121 If the result is false then *ERRNO_PTR is set to a useful value assuming
122 we're expecting a regular file. */
123 extern bool is_regular_file (const char *name
, int *errno_ptr
);
125 #endif /* FILESTUFF_H */
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