1 /* tee - read from standard input and write to standard output and files.
2 Copyright (C) 85,1990-2006 Free Software Foundation, Inc.
4 This program is free software; you can redistribute it and/or modify
5 it under the terms of the GNU General Public License as published by
6 the Free Software Foundation; either version 2, or (at your option)
9 This program is distributed in the hope that it will be useful,
10 but WITHOUT ANY WARRANTY; without even the implied warranty of
11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 GNU General Public License for more details.
14 You should have received a copy of the GNU General Public License
15 along with this program; if not, write to the Free Software Foundation,
16 Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
18 /* Mike Parker, Richard M. Stallman, and David MacKenzie */
21 #include <sys/types.h>
29 /* The official name of this program (e.g., no `g' prefix). */
30 #define PROGRAM_NAME "tee"
32 #define AUTHORS "Mike Parker", "Richard M. Stallman", "David MacKenzie"
34 static bool tee_files (int nfiles
, const char **files
);
36 /* If true, append to output files rather than truncating them. */
39 /* If true, ignore interrupts. */
40 static bool ignore_interrupts
;
42 /* The name that this program was run with. */
45 static struct option
const long_options
[] =
47 {"append", no_argument
, NULL
, 'a'},
48 {"ignore-interrupts", no_argument
, NULL
, 'i'},
49 {GETOPT_HELP_OPTION_DECL
},
50 {GETOPT_VERSION_OPTION_DECL
},
57 if (status
!= EXIT_SUCCESS
)
58 fprintf (stderr
, _("Try `%s --help' for more information.\n"),
62 printf (_("Usage: %s [OPTION]... [FILE]...\n"), program_name
);
64 Copy standard input to each FILE, and also to standard output.\n\
66 -a, --append append to the given FILEs, do not overwrite\n\
67 -i, --ignore-interrupts ignore interrupt signals\n\
69 fputs (HELP_OPTION_DESCRIPTION
, stdout
);
70 fputs (VERSION_OPTION_DESCRIPTION
, stdout
);
73 If a FILE is -, copy again to standard output.\n\
75 printf (_("\nReport bugs to <%s>.\n"), PACKAGE_BUGREPORT
);
81 main (int argc
, char **argv
)
86 initialize_main (&argc
, &argv
);
87 program_name
= argv
[0];
88 setlocale (LC_ALL
, "");
89 bindtextdomain (PACKAGE
, LOCALEDIR
);
92 atexit (close_stdout
);
95 ignore_interrupts
= false;
97 while ((optc
= getopt_long (argc
, argv
, "ai", long_options
, NULL
)) != -1)
106 ignore_interrupts
= true;
109 case_GETOPT_HELP_CHAR
;
111 case_GETOPT_VERSION_CHAR (PROGRAM_NAME
, AUTHORS
);
114 usage (EXIT_FAILURE
);
118 if (ignore_interrupts
)
119 signal (SIGINT
, SIG_IGN
);
121 /* Do *not* warn if tee is given no file arguments.
122 POSIX requires that it work when given no arguments. */
124 ok
= tee_files (argc
- optind
, (const char **) &argv
[optind
]);
125 if (close (STDIN_FILENO
) != 0)
126 error (EXIT_FAILURE
, errno
, _("standard input"));
128 exit (ok
? EXIT_SUCCESS
: EXIT_FAILURE
);
131 /* Copy the standard input into each of the NFILES files in FILES
132 and into the standard output.
133 Return true if successful. */
136 tee_files (int nfiles
, const char **files
)
143 char const *mode_string
=
145 ? (append
? "ab" : "wb")
146 : (append
? "a" : "w"));
148 descriptors
= xnmalloc (nfiles
+ 1, sizeof *descriptors
);
150 /* Move all the names `up' one in the argv array to make room for
151 the entry for standard output. This writes into argv[argc]. */
152 for (i
= nfiles
; i
>= 1; i
--)
153 files
[i
] = files
[i
- 1];
155 if (O_BINARY
&& ! isatty (STDIN_FILENO
))
156 freopen (NULL
, "rb", stdin
);
157 if (O_BINARY
&& ! isatty (STDOUT_FILENO
))
158 freopen (NULL
, "wb", stdout
);
160 /* In the array of NFILES + 1 descriptors, make
161 the first one correspond to standard output. */
162 descriptors
[0] = stdout
;
163 files
[0] = _("standard output");
164 SETVBUF (stdout
, NULL
, _IONBF
, 0);
166 for (i
= 1; i
<= nfiles
; i
++)
168 descriptors
[i
] = (STREQ (files
[i
], "-")
170 : fopen (files
[i
], mode_string
));
171 if (descriptors
[i
] == NULL
)
173 error (0, errno
, "%s", files
[i
]);
177 SETVBUF (descriptors
[i
], NULL
, _IONBF
, 0);
182 bytes_read
= read (0, buffer
, sizeof buffer
);
184 if (bytes_read
< 0 && errno
== EINTR
)
190 /* Write to all NFILES + 1 descriptors.
191 Standard output is the first one. */
192 for (i
= 0; i
<= nfiles
; i
++)
194 && fwrite (buffer
, 1, bytes_read
, descriptors
[i
]) != bytes_read
)
196 error (0, errno
, "%s", files
[i
]);
197 descriptors
[i
] = NULL
;
202 if (bytes_read
== -1)
204 error (0, errno
, _("read error"));
208 /* Close the files, but not standard output. */
209 for (i
= 1; i
<= nfiles
; i
++)
210 if (!STREQ (files
[i
], "-")
211 && descriptors
[i
] && fclose (descriptors
[i
]) != 0)
213 error (0, errno
, "%s", files
[i
]);