projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| 2cfa7fbb KS |
1 | /* Copyright (c) 1979 Regents of the University of California */ |
| 2 | # | |
| 3 | ||
| 4 | ||
| 5 | /* | |
| 6 | * Getname / getuserid for those with no | |
| 7 | * hashed passwd data base). | |
| 8 | * Do not compile this module in if you DO have hashed | |
| 9 | * passwd's -- this is slower. | |
| 10 | * | |
| 11 | * Also provided here is a getpw routine which can share | |
| 12 | * the open file. This is used for the Version 6 getenv | |
| 13 | * implementation. | |
| 14 | */ | |
| 15 | ||
| 16 | #include "rcv.h" | |
| 17 | ||
| 18 | static FILE *pwfile = NULL; /* Pw file held open */ | |
| 19 | static char *pwname = "/etc/passwd"; /* Name of passwd file */ | |
| 20 | ||
| 21 | /* | |
| 22 | * Search the passwd file for a uid. Return name through ref parameter | |
| 23 | * if found, indicating success with 0 return. Return -1 on error. | |
| 24 | * If -1 is passed as the user id, close the passwd file. | |
| 25 | */ | |
| 26 | ||
| 27 | getname(uid, namebuf) | |
| 28 | char namebuf[]; | |
| 29 | { | |
| 30 | register char *cp, *cp2; | |
| 31 | char linebuf[BUFSIZ]; | |
| 32 | ||
| 33 | if (uid == -1) { | |
| 34 | if (pwfile != NULL) | |
| 35 | fclose(pwfile); | |
| 36 | pwfile = NULL; | |
| 37 | return(0); | |
| 38 | } | |
| 39 | if (pwfile == NULL && (pwfile = fopen(pwname, "r")) == NULL) | |
| 40 | return(-1); | |
| 41 | rewind(pwfile); | |
| 42 | while (fgets(linebuf, BUFSIZ, pwfile) != NULL) | |
| 43 | if (pweval(linebuf) == uid) { | |
| 44 | for (cp = linebuf, cp2 = namebuf; *cp != ':'; | |
| 45 | *cp2++ = *cp++) | |
| 46 | ; | |
| 47 | *cp2 = '\0'; | |
| 48 | return(0); | |
| 49 | } | |
| 50 | return(-1); | |
| 51 | } | |
| 52 | ||
| 53 | /* | |
| 54 | * Read the users password file line into the passed line | |
| 55 | * buffer. | |
| 56 | */ | |
| 57 | ||
| 58 | getpw(uid, linebuf) | |
| 59 | char linebuf[]; | |
| 60 | { | |
| 61 | register char *cp, *cp2; | |
| 62 | ||
| 63 | if (uid == -1) { | |
| 64 | if (pwfile != NULL) | |
| 65 | fclose(pwfile); | |
| 66 | pwfile = NULL; | |
| 67 | return(0); | |
| 68 | } | |
| 69 | if (pwfile == NULL && (pwfile = fopen(pwname, "r")) == NULL) | |
| 70 | return(-1); | |
| 71 | rewind(pwfile); | |
| 72 | while (fgets(linebuf, BUFSIZ, pwfile) != NULL) | |
| 73 | if (pweval(linebuf) == uid) { | |
| 74 | if (linebuf[0] != '\0') | |
| 75 | linebuf[strlen(linebuf)-1] = '\0'; | |
| 76 | return(0); | |
| 77 | } | |
| 78 | return(-1); | |
| 79 | } | |
| 80 | ||
| 81 | /* | |
| 82 | * Convert the passed name to a user id and return it. Return -1 | |
| 83 | * on error. Iff the name passed is -1 (yech) close the pwfile. | |
| 84 | */ | |
| 85 | ||
| 86 | getuserid(name) | |
| 87 | char name[]; | |
| 88 | { | |
| 89 | register char *cp, *cp2; | |
| 90 | char linebuf[BUFSIZ]; | |
| 91 | ||
| 92 | if (name == (char *) -1) { | |
| 93 | if (pwfile != NULL) | |
| 94 | fclose(pwfile); | |
| 95 | pwfile = NULL; | |
| 96 | return(0); | |
| 97 | } | |
| 98 | if (pwfile == NULL && (pwfile = fopen(pwname, "r")) == NULL) | |
| 99 | return(-1); | |
| 100 | rewind(pwfile); | |
| 101 | while (fgets(linebuf, BUFSIZ, pwfile) != NULL) { | |
| 102 | for (cp = name, cp2 = linebuf; *cp++ == *cp2++;) | |
| 103 | ; | |
| 104 | if (*--cp == '\0' && *--cp2 == ':') | |
| 105 | return(pweval(linebuf)); | |
| 106 | } | |
| 107 | return(-1); | |
| 108 | } | |
| 109 | ||
| 110 | /* | |
| 111 | * Evaluate the user id of the passed passwd line and return it. | |
| 112 | */ | |
| 113 | ||
| 114 | static | |
| 115 | pweval(line) | |
| 116 | char line[]; | |
| 117 | { | |
| 118 | register char *cp; | |
| 119 | register int i; | |
| 120 | register int uid; | |
| 121 | ||
| 122 | for (cp = line, i = 0; i < 2; i += (*cp++ == ':')) | |
| 123 | ; | |
| 124 | uid = atoi(cp); | |
| 125 | ||
| 126 | #ifdef UIDGID | |
| 127 | while (*cp && *cp != ':') | |
| 128 | cp++; | |
| 129 | cp++; | |
| 130 | uid |= atoi(cp) << 8; | |
| 131 | #endif | |
| 132 | ||
| 133 | return(uid); | |
| 134 | } |