Commit | Line | Data |
---|---|---|
b0f79ad7 KS |
1 | # |
2 | ||
3 | ||
4 | /* | |
5 | * Getname / getuserid for those with no | |
6 | * hashed passwd data base). | |
7 | * Do not compile this module in if you DO have hashed | |
8 | * passwd's -- this is slower. | |
9 | * | |
10 | * Also provided here is a getpw routine which can share | |
11 | * the open file. This is used for the Version 6 getenv | |
12 | * implementation. | |
13 | */ | |
14 | ||
79ddb121 | 15 | static char *SccsId = "@(#)getname.c 2.1 %G%"; |
b0f79ad7 KS |
16 | |
17 | #include "rcv.h" | |
18 | ||
19 | static FILE *pwfile = NULL; /* Pw file held open */ | |
20 | static char *pwname = "/etc/passwd"; /* Name of passwd file */ | |
21 | ||
22 | /* | |
23 | * Search the passwd file for a uid. Return name through ref parameter | |
24 | * if found, indicating success with 0 return. Return -1 on error. | |
25 | * If -1 is passed as the user id, close the passwd file. | |
26 | */ | |
27 | ||
28 | getname(uid, namebuf) | |
29 | char namebuf[]; | |
30 | { | |
31 | register char *cp, *cp2; | |
32 | char linebuf[BUFSIZ]; | |
33 | ||
34 | if (uid == -1) { | |
35 | if (pwfile != NULL) | |
36 | fclose(pwfile); | |
37 | pwfile = NULL; | |
38 | return(0); | |
39 | } | |
40 | if (pwfile == NULL && (pwfile = fopen(pwname, "r")) == NULL) | |
41 | return(-1); | |
42 | rewind(pwfile); | |
43 | while (fgets(linebuf, BUFSIZ, pwfile) != NULL) | |
44 | if (pweval(linebuf) == uid) { | |
45 | for (cp = linebuf, cp2 = namebuf; *cp != ':'; | |
46 | *cp2++ = *cp++) | |
47 | ; | |
48 | *cp2 = '\0'; | |
49 | return(0); | |
50 | } | |
51 | return(-1); | |
52 | } | |
53 | ||
54 | /* | |
55 | * Read the users password file line into the passed line | |
56 | * buffer. | |
57 | */ | |
58 | ||
59 | getpw(uid, linebuf) | |
60 | char linebuf[]; | |
61 | { | |
62 | register char *cp, *cp2; | |
63 | ||
64 | if (uid == -1) { | |
65 | if (pwfile != NULL) | |
66 | fclose(pwfile); | |
67 | pwfile = NULL; | |
68 | return(0); | |
69 | } | |
70 | if (pwfile == NULL && (pwfile = fopen(pwname, "r")) == NULL) | |
71 | return(-1); | |
72 | rewind(pwfile); | |
73 | while (fgets(linebuf, BUFSIZ, pwfile) != NULL) | |
74 | if (pweval(linebuf) == uid) { | |
75 | if (linebuf[0] != '\0') | |
76 | linebuf[strlen(linebuf)-1] = '\0'; | |
77 | return(0); | |
78 | } | |
79 | return(-1); | |
80 | } | |
81 | ||
82 | /* | |
83 | * Look for passwd line belonging to 'name' | |
84 | */ | |
85 | ||
86 | getpwnam(name, linebuf) | |
87 | char name[], linebuf[]; | |
88 | { | |
89 | register char *cp, *cp2; | |
90 | ||
91 | if (name == NOSTR) { | |
92 | if (pwfile != NULL) | |
93 | fclose(pwfile); | |
94 | pwfile = NULL; | |
95 | return(0); | |
96 | } | |
97 | if (pwfile == NULL && (pwfile = fopen(pwname, "r")) == NULL) { | |
98 | perror(pwname); | |
99 | return(-1); | |
100 | } | |
101 | rewind(pwfile); | |
102 | while (fgets(linebuf, BUFSIZ, pwfile) != NULL) { | |
103 | cp = linebuf; | |
104 | cp2 = name; | |
105 | while (*cp2++ == *cp++) | |
106 | ; | |
107 | if (*--cp == ':' && *--cp2 == 0) | |
108 | return(0); | |
109 | } | |
110 | return(-1); | |
111 | } | |
112 | ||
113 | /* | |
114 | * Convert the passed name to a user id and return it. Return -1 | |
115 | * on error. Iff the name passed is -1 (yech) close the pwfile. | |
116 | */ | |
117 | ||
118 | getuserid(name) | |
119 | char name[]; | |
120 | { | |
121 | register char *cp, *cp2; | |
122 | char linebuf[BUFSIZ]; | |
123 | ||
124 | if (name == (char *) -1) { | |
125 | if (pwfile != NULL) | |
126 | fclose(pwfile); | |
127 | pwfile = NULL; | |
128 | return(0); | |
129 | } | |
130 | if (pwfile == NULL && (pwfile = fopen(pwname, "r")) == NULL) | |
131 | return(-1); | |
132 | rewind(pwfile); | |
133 | while (fgets(linebuf, BUFSIZ, pwfile) != NULL) { | |
134 | for (cp = name, cp2 = linebuf; *cp++ == *cp2++;) | |
135 | ; | |
136 | if (*--cp == '\0' && *--cp2 == ':') | |
137 | return(pweval(linebuf)); | |
138 | } | |
139 | return(-1); | |
140 | } | |
141 | ||
142 | /* | |
143 | * Evaluate the user id of the passed passwd line and return it. | |
144 | */ | |
145 | ||
146 | static | |
147 | pweval(line) | |
148 | char line[]; | |
149 | { | |
150 | register char *cp; | |
151 | register int i; | |
152 | register int uid; | |
153 | ||
154 | for (cp = line, i = 0; i < 2; i += (*cp++ == ':')) | |
155 | ; | |
156 | uid = atoi(cp); | |
157 | ||
158 | #ifdef UIDGID | |
159 | while (*cp && *cp != ':') | |
160 | cp++; | |
161 | cp++; | |
162 | uid |= atoi(cp) << 8; | |
163 | #endif | |
164 | ||
165 | return(uid); | |
166 | } |