654a7a0c29
2002-02-02 Ulrich Drepper <drepper@redhat.com> * manual/examples/mkfsock.c (make_named_socket): Make sure name is always NUL-terminated. Patch by Chris D. Sloan <cds@cs.hmc.edu>.
46 lines
993 B
C
46 lines
993 B
C
#include <stddef.h>
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#include <stdio.h>
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#include <errno.h>
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#include <stdlib.h>
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#include <sys/socket.h>
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#include <sys/un.h>
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int
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make_named_socket (const char *filename)
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{
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struct sockaddr_un name;
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int sock;
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size_t size;
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/* Create the socket. */
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sock = socket (PF_LOCAL, SOCK_DGRAM, 0);
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if (sock < 0)
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{
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perror ("socket");
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exit (EXIT_FAILURE);
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}
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/* Bind a name to the socket. */
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name.sun_family = AF_LOCAL;
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strncpy (name.sun_path, filename, sizeof (name.sun_path));
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name.sun_path[sizeof (name.sun_path) - 1] = '\0';
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/* The size of the address is
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the offset of the start of the filename,
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plus its length,
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plus one for the terminating null byte.
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Alternatively you can just do:
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size = SUN_LEN (&name);
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*/
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size = (offsetof (struct sockaddr_un, sun_path)
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+ strlen (name.sun_path) + 1);
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if (bind (sock, (struct sockaddr *) &name, size) < 0)
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{
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perror ("bind");
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exit (EXIT_FAILURE);
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}
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return sock;
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}
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