sockets/ud_ucase.h

This is sockets/ud_ucase.h (Listing 57-5, page 1171), an example from the book, The Linux Programming Interface.

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Cover of The Linux Programming Interface

+/* ud_ucase.h
+
+   Header file for ud_ucase_sv.c and ud_ucase_cl.c.
+
+   These programs employ sockets in /tmp. This makes it easy to compile
+   and run the programs. However, for a security reasons, a real-world
+   application should never create sensitive files in /tmp. (As a simple of
+   example of the kind of security problems that can result, a malicious
+   user could create a file using the name defined in SV_SOCK_PATH, and
+   thereby cause a denial of service attack against this application.
+   See Section 38.7 of "The Linux Programming Interface" for more details
+   on this subject.)
+*/
 #include <sys/un.h>
 #include <sys/socket.h>
 #include <ctype.h>
 #include "tlpi_hdr.h"
 
 #define BUF_SIZE 10             /* Maximum size of messages exchanged
                                    between client and server */
 
 #define SV_SOCK_PATH "/tmp/ud_ucase"

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