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makedbm(8) System Manager's Manual makedbm(8) NAME makedbm - Makes a Network Information Service (NIS) dbm file SYNOPSIS /var/yp/makedbm [-i yp_input_file] [-s yp_secure_name] [-a method] [-o yp_output_name] [-d yp_domain_name] [-m yp_master_name] infile outfile /var/yp/makedbm [-u dbmfilename] FLAGS Specifies that NIS maps are to be stored in one of the following for- mats: btree - Recommended when creating and maintaining very large maps. dbm/ndbm - For backward compatibility. This is the default. hash - A potentially quicker method for managing small maps. Creates a special entry with the key yp_input_file. Creates a special entry with the key yp_secure_file. This causes the makedbm command to write a se- cure map. The key value ypserver looks for YP_SECURE. Creates a spe- cial entry with the key yp_output_name. Creates a special entry with the key yp_domain_name. Creates a special entry with the key yp_mas- ter_name. If no master host name is specified, yp_master_name will be set to the local host name. Undoes a dbm file. That is, prints out a dbm file one entry per line, with a single space separating keys from values. DESCRIPTION The makedbm command takes the file specified by the argument infile and converts it to a single file or a pair of files in dbm(3), btree(3), or hash(3) format. The dbm(3) files are stored as outfile.pag and out- file.dir. The btree(3) files are stored as outfile.btree. Each line of the input file is converted to a single dbm record. All characters up to the first tab or space form the key, and the rest of the line is de- fined as the key's associated data. If a line ends with a backslash (\), the data for that record is continued onto the next line. It is left for the Network Information Service (NIS) clients to interpret the number sign (#); makedbm does not treat it as a comment character. The infile parameter can be a hyphen (-), in which case makedbm reads the standard input. The makedbm command is meant to be used in generating database files for NIS. The makedbm command generates a special entry with the key yp_last_modified, which is the date of infile. RESTRICTIONS You must use the same database format for each map in a domain. In ad- dition, a server serving multiple NIS domains must use the same data- base format for all domains. Although a Digital UNIX NIS server that takes advantage of btree files will be able to store very large maps, NIS slave servers that lack this feature might have a much smaller limit on the number of map entries they can handle. It may not be possible to distribute very large maps from a Digital UNIX NIS master server to a slave server that lacks sup- port for very large maps. NIS clients are not affected by these en- hancements. EXAMPLES The following example shows how a combination of commands can be used to make the NIS dbm files passwd.byname.pag and passwd.byname.dir from the /etc/passwd file. The percent sign (%) signifies the system prompt. % awk 'BEGIN { FS = ":"; OFS = ""; } { print $1, $0 }' /etc/passwd > ptmp % makedbm ptmp passwd.byname % rm ptmp The awk command creates the file ptmp which is in a form usable by makedbm. The makedbm command uses the ptmp file to create the database files. The rm command removes the ptmp file. The following is an example of the makedb command used with the btree format database routine to store NIS maps. makedbm -a b ... RELATED INFORMATION Commands: yppasswd(1), ypmake(8). Functions: btree(3), dbm(3), dbopen(3), hash(3), ndbm(3). delim off makedbm(8)