2 * Copyright (c) 2001 Kungliga Tekniska Högskolan
3 * (Royal Institute of Technology, Stockholm, Sweden).
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
17 * 3. Neither the name of the Institute nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
21 * THIS SOFTWARE IS PROVIDED BY THE INSTITUTE AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE INSTITUTE OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
43 #include <sys/types.h>
55 #define MAP_FAILED ((void *)-1)
61 doit_mmap(int fd
, struct stat
*sb
)
66 mmap_buf
= mmap (NULL
, sb
->st_size
, PROT_READ
, MAP_PRIVATE
, fd
, 0);
67 if (mmap_buf
== (void *)MAP_FAILED
)
69 ret
= write (STDOUT_FILENO
, mmap_buf
, sb
->st_size
);
70 if (ret
!= sb
->st_size
)
71 err(1, "write returned %d wanted to write %d",
72 ret
, (int)sb
->st_size
);
73 munmap(mmap_buf
, sb
->st_size
);
78 doit_read(int fd
, struct stat
*sb
)
83 read_buf
= malloc(sb
->st_size
);
85 err(1, "malloc(%d)", (int)sb
->st_size
);
86 ret
= read(fd
, read_buf
, sb
->st_size
);
87 if (ret
!= sb
->st_size
)
88 err(1, "read returned %d wanted to write %d",
89 ret
, (int)sb
->st_size
);
90 ret
= write (STDOUT_FILENO
, read_buf
, sb
->st_size
);
91 if (ret
!= sb
->st_size
)
92 err(1, "write returned %d wanted to write %d",
93 ret
, (int)sb
->st_size
);
98 doit (const char *filename
, void (*func
)(int, struct stat
*))
104 fd
= open (filename
, O_RDONLY
);
106 err(1, "open %s", filename
);
107 ret
= fstat (fd
, &sb
);
110 err (1, "stat %s", filename
);
114 static int read_flag
;
115 static int mmap_flag
;
116 static int help_flag
;
118 static struct agetargs args
[] = {
119 {"read", 'r', aarg_flag
, &read_flag
, "read", NULL
},
120 {"mmap", 'm', aarg_flag
, &mmap_flag
, "mmap", NULL
},
121 {"help", 0, aarg_flag
, &help_flag
, NULL
, NULL
},
122 {NULL
, 0, aarg_end
, NULL
, NULL
, NULL
}
128 aarg_printusage (args
, NULL
, "filename", AARG_AFSSTYLE
);
133 main(int argc
, char **argv
)
137 setprogname (argv
[0]);
139 if (agetarg (args
, argc
, argv
, &optind
, AARG_AFSSTYLE
))
151 if (read_flag
&& mmap_flag
)
152 errx(1, "can't do both mmap and read");
155 doit(argv
[0], doit_read
);
157 doit(argv
[0], doit_mmap
);