| Line | Hits | Source |
|---|---|---|
| 1 | package umich.cac.util; | |
| 2 | ||
| 3 | import java.io.BufferedReader; | |
| 4 | import java.io.File; | |
| 5 | import java.io.FileNotFoundException; | |
| 6 | import java.io.FileReader; | |
| 7 | import java.io.IOException; | |
| 8 | import java.util.Vector; | |
| 9 | import java.util.logging.Logger; | |
| 10 | ||
| 11 | /** | |
| 12 | * A class that reads a UNIX style password file so we can obtain the UNIX uid | |
| 13 | * for a given user for PBS accounting | |
| 14 | * | |
| 15 | * @author rmach@umich.edu | |
| 16 | * @Version $Header: /cvsroot/pbsaccounting/pbsaccounting/src/umich/cac/util/Passwd.java,v 1.2 2003/10/21 19:08:00 rodmach Exp $ | |
| 17 | */ | |
| 18 | public class Passwd { | |
| 19 | ||
| 20 | /** If UID not found, the default value is NOT_FOUND */ | |
| 21 | 3 | public long NOT_FOUND = -1; |
| 22 | ||
| 23 | /** The default system password file */ | |
| 24 | 3 | private String passwdFile = "/etc/passwd"; |
| 25 | /** The Login ID field position */ | |
| 26 | 3 | private int LOGIN_ID = 0; |
| 27 | /** The Passwd field posistion */ | |
| 28 | 3 | private int PASSWORD = 1; |
| 29 | /** The UID field position */ | |
| 30 | 3 | private int UID = 2; |
| 31 | /** The GID field position */ | |
| 32 | 3 | private int GID = 3; |
| 33 | /** The GECOS field position */ | |
| 34 | 3 | private int GECOS = 4; |
| 35 | /** The HOME DIR field position */ | |
| 36 | 3 | private int HOME_DIR = 5; |
| 37 | /** The shell field position */ | |
| 38 | 3 | private int SHELL = 6; |
| 39 | ||
| 40 | /** Used for logging */ | |
| 41 | 6 | private Logger logger = Logger.getLogger(Passwd.class.getName()); |
| 42 | ||
| 43 | /** | |
| 44 | * A vector of String[] of the tokens in a unix passwd entries | |
| 45 | * [0] -> [LOGIN ID] [ PASSWORD] [UID] [GID] [GECOS] [HOME_DIR] [SHELL] | |
| 46 | * [1] -> [LOGIN ID] [ PASSWORD] [UID] [GID] [GECOS] [HOME_DIR] [SHELL] etc. etc. | |
| 47 | */ | |
| 48 | 3 | private Vector passwdVector = new Vector(); |
| 49 | ||
| 50 | /** | |
| 51 | * Constructor for unit testing | |
| 52 | * | |
| 53 | * @param passwdFile | |
| 54 | * an optional password file to use for lookups | |
| 55 | * @throws IOException | |
| 56 | * if problem reading password file | |
| 57 | * @throws FileNotFoundException | |
| 58 | * if doesn't exist | |
| 59 | */ | |
| 60 | public Passwd(String passwdFile) | |
| 61 | 3 | throws FileNotFoundException, IOException { |
| 62 | 3 | this.passwdFile = passwdFile; |
| 63 | ||
| 64 | 3 | if (!isExist(passwdFile)) { |
| 65 | 0 | throw new FileNotFoundException("File was not found " + passwdFile); |
| 66 | } | |
| 67 | ||
| 68 | 3 | readFile(); |
| 69 | 3 | } |
| 70 | ||
| 71 | /** | |
| 72 | * Constructor. By default reads "/etc/passwd" file | |
| 73 | * | |
| 74 | * @throws IOException | |
| 75 | * if problem reading password file | |
| 76 | * @throws FileNotFoundException | |
| 77 | * if doesn't exist | |
| 78 | * | |
| 79 | */ | |
| 80 | 0 | public Passwd() throws FileNotFoundException, IOException { |
| 81 | ||
| 82 | 0 | if (!isExist(passwdFile)) { |
| 83 | 0 | throw new FileNotFoundException("File was not found " + passwdFile); |
| 84 | } | |
| 85 | ||
| 86 | 0 | readFile(); |
| 87 | ||
| 88 | 0 | } |
| 89 | ||
| 90 | /** | |
| 91 | * Checks if passwd file exists | |
| 92 | * | |
| 93 | * @param passwd | |
| 94 | * file to check for | |
| 95 | * @return true if exists, false if not | |
| 96 | */ | |
| 97 | ||
| 98 | public boolean isExist(String filename) { | |
| 99 | 3 | File passFile = new File(filename); |
| 100 | ||
| 101 | 3 | if (passFile.exists()) { |
| 102 | 3 | return true; |
| 103 | } else { | |
| 104 | 0 | return false; |
| 105 | } | |
| 106 | ||
| 107 | } | |
| 108 | ||
| 109 | /** | |
| 110 | * Reads the passwd file and creates the passwdVector. If the passwd file | |
| 111 | * can not be read, then passwordVector is set to null | |
| 112 | * | |
| 113 | */ | |
| 114 | private void readFile() throws IOException { | |
| 115 | ||
| 116 | try { | |
| 117 | 3 | BufferedReader in = new BufferedReader(new FileReader(passwdFile)); |
| 118 | String str; | |
| 119 | ||
| 120 | 9 | while ((str = in.readLine()) != null) { |
| 121 | 6 | String[] entries = str.split(":"); |
| 122 | 6 | passwdVector.add(entries); |
| 123 | } | |
| 124 | 3 | in.close(); |
| 125 | 0 | } catch (IOException e) { |
| 126 | 0 | logger.throwing("readFile", "readFile", e); |
| 127 | 0 | throw e; |
| 128 | 3 | } |
| 129 | ||
| 130 | 3 | } |
| 131 | ||
| 132 | /** | |
| 133 | * Lookup the UID for a user given the loginId | |
| 134 | * | |
| 135 | * @param loginId | |
| 136 | * The login ID (entry 0 in the passwd file) | |
| 137 | * @return The UID for the corresponding loginId, or NOT_FOUND if not found | |
| 138 | */ | |
| 139 | public long lookupUid(String loginId) { | |
| 140 | ||
| 141 | 6 | for (int i = 0; i < passwdVector.size(); i++) { |
| 142 | 6 | String[] entry = (String[]) passwdVector.get(i); |
| 143 | 6 | if (entry[LOGIN_ID].equals(loginId)) { |
| 144 | 3 | Long uid = new Long(entry[UID]); |
| 145 | 3 | return uid.longValue(); |
| 146 | } | |
| 147 | } | |
| 148 | ||
| 149 | 0 | return NOT_FOUND; |
| 150 | } | |
| 151 | ||
| 152 | } |
|
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