projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| 9aabfbe8 | 1 | /* getpwnamuid.c 4.5 84/08/28 */ |
| 8b87132c RC |
2 | |
| 3 | #include <stdio.h> | |
| 4 | #include <pwd.h> | |
| 5 | #include <ndbm.h> | |
| 6 | ||
| 7 | #include <sys/file.h> | |
| 8 | ||
| 9 | static char PASSWD[] = "/etc/passwd"; | |
| 10 | static char EMPTY[] = ""; | |
| 11 | static char line[BUFSIZ+1]; | |
| 12 | static struct passwd passwd; | |
| 499a4b51 RC |
13 | DBM *_pw_db = 0; |
| 14 | int _pw_stayopen = 0; | |
| 8b87132c RC |
15 | |
| 16 | static struct passwd * | |
| 17 | fetchpw(key) | |
| 18 | datum key; | |
| 19 | { | |
| 0c41f198 | 20 | register char *cp, *tp; |
| 8b87132c | 21 | |
| 0c41f198 | 22 | if (key.dptr == 0) |
| 8b87132c | 23 | return ((struct passwd *)NULL); |
| 499a4b51 | 24 | key = dbmfetch(_pw_db, key); |
| 8b87132c RC |
25 | if (key.dptr == 0) |
| 26 | return ((struct passwd *)NULL); | |
| 27 | cp = key.dptr; | |
| 0c41f198 | 28 | tp = line; |
| 8b87132c | 29 | |
| 0c41f198 | 30 | #define EXPAND(e) passwd.pw_/**/e = tp; while (*tp++ = *cp++); |
| 8b87132c RC |
31 | EXPAND(name); |
| 32 | EXPAND(passwd); | |
| 33 | passwd.pw_uid = *(int *)cp; cp += sizeof (int); | |
| 34 | passwd.pw_gid = *(int *)cp; cp += sizeof (int); | |
| 35 | passwd.pw_quota = *(int *)cp; cp += sizeof (int); | |
| 36 | EXPAND(comment); | |
| 37 | EXPAND(gecos); | |
| 38 | EXPAND(dir); | |
| 39 | EXPAND(shell); | |
| 40 | return (&passwd); | |
| 41 | } | |
| 42 | ||
| 43 | struct passwd * | |
| 44 | getpwnam(nam) | |
| 45 | char *nam; | |
| 46 | { | |
| 47 | datum key; | |
| 48 | register struct passwd *pw; | |
| 49 | ||
| 499a4b51 RC |
50 | if (_pw_db == (DBM *)0 && |
| 51 | (_pw_db = ndbmopen(PASSWD, O_RDONLY)) == (DBM *)0) { | |
| 52 | oldcode: | |
| 53 | setpwent(); | |
| 54 | while ((pw = getpwent()) && strcmp(nam, pw->pw_name)); | |
| 55 | endpwent(); | |
| 56 | return (pw); | |
| 57 | } | |
| 58 | if (flock(_pw_db->db_dirf, LOCK_SH) < 0) { | |
| 59 | ndbmclose(_pw_db); | |
| 60 | _pw_db = (DBM *)0; | |
| 61 | goto oldcode; | |
| 62 | } | |
| 8b87132c RC |
63 | key.dptr = nam; |
| 64 | key.dsize = strlen(nam); | |
| 65 | pw = fetchpw(key); | |
| 499a4b51 RC |
66 | (void) flock(_pw_db->db_dirf, LOCK_UN); |
| 67 | if (!_pw_stayopen) { | |
| 68 | ndbmclose(_pw_db); | |
| 69 | _pw_db = (DBM *)0; | |
| 70 | } | |
| 8b87132c RC |
71 | return (pw); |
| 72 | } | |
| 73 | ||
| 74 | struct passwd * | |
| 75 | getpwuid(uid) | |
| 76 | int uid; | |
| 77 | { | |
| 78 | datum key; | |
| 79 | register struct passwd *pw; | |
| 80 | ||
| 499a4b51 RC |
81 | if (_pw_db == (DBM *)0 && |
| 82 | (_pw_db = ndbmopen(PASSWD, O_RDONLY)) == (DBM *)0) { | |
| 83 | oldcode: | |
| 84 | setpwent(); | |
| 85 | while ((pw = getpwent()) && pw->pw_uid != uid); | |
| 86 | endpwent(); | |
| 87 | return (pw); | |
| 88 | } | |
| 89 | if (flock(_pw_db->db_dirf, LOCK_SH) < 0) { | |
| 90 | ndbmclose(_pw_db); | |
| 91 | _pw_db = (DBM *)0; | |
| 92 | goto oldcode; | |
| 93 | } | |
| 8b87132c RC |
94 | key.dptr = (char *) &uid; |
| 95 | key.dsize = sizeof uid; | |
| 96 | pw = fetchpw(key); | |
| 499a4b51 RC |
97 | (void) flock(_pw_db->db_dirf, LOCK_UN); |
| 98 | if (!_pw_stayopen) { | |
| 99 | ndbmclose(_pw_db); | |
| 100 | _pw_db = (DBM *)0; | |
| 101 | } | |
| 8b87132c RC |
102 | return (pw); |
| 103 | } |