Commit | Line | Data |
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f0843e8a KS |
1 | # |
2 | ||
3 | /* | |
4 | * Mail -- a mail program | |
5 | * | |
6 | * Ingres 11/70. Unix version 6.0 | |
7 | * | |
8 | * Local routines that are installation dependent. | |
9 | * All fiddlers please note: if you make careful note of | |
10 | * what you change here, I will incorporate your changes and | |
11 | * you won't have to remake them each release. | |
12 | */ | |
13 | ||
79ddb121 | 14 | static char *SccsId = "@(#)ing.local.c 2.1 %G%"; |
f0843e8a KS |
15 | |
16 | #include "rcv.h" | |
17 | #include <errno.h> | |
18 | ||
19 | /* | |
20 | * Locate the user's mailbox file (ie, the place where new, unread | |
21 | * mail is queued). At Ingres, it's in /usr/spool/mail/loginname. | |
22 | */ | |
23 | ||
24 | findmail() | |
25 | { | |
26 | register char *cp; | |
27 | ||
28 | cp = copy("/usr/spool/mail/", mailname); | |
29 | copy(myname, cp); | |
30 | } | |
31 | ||
32 | /* | |
33 | * Get rid of the queued mail. | |
34 | */ | |
35 | ||
36 | demail() | |
37 | { | |
38 | if (unlink(mailname) >= 0) | |
39 | return; | |
40 | close(creat(mailname, 0666)); | |
41 | alter(mailname); | |
42 | } | |
43 | ||
44 | /* | |
45 | * Get an environment variable. At present, we only support | |
46 | * "SHELL" and "HOME". This routine makes use of the getpw | |
47 | * routine in the neighboring getname.c stuff. | |
48 | */ | |
49 | ||
50 | char * | |
51 | getenv(name) | |
52 | char name[]; | |
53 | { | |
54 | char pwline[LINESIZE]; | |
55 | static char val[30]; | |
56 | register char *cp, *dp; | |
57 | register int cc; | |
58 | ||
59 | if (equal(name, "SHELL")) | |
60 | cc = 6; | |
61 | else if (equal(name, "HOME")) | |
62 | cc = 5; | |
63 | else | |
64 | return(NOSTR); | |
65 | if (getpwnam(myname, pwline) < 0) | |
66 | return(NOSTR); | |
67 | for (cp = pwline; *cp && cc > 0;) | |
68 | if (*cp++ == ':') | |
69 | cc--; | |
70 | dp = cp; | |
71 | while (*cp != ':' && *cp != '\0' && *cp != '\n') | |
72 | cp++; | |
73 | *cp = '\0'; | |
74 | if (*dp == '\0') | |
75 | return(NOSTR); | |
76 | copy(dp, val); | |
77 | return(val); | |
78 | } | |
79 | ||
80 | /* | |
81 | * Discover user name. On Ingres, user names are rarely 1-1 with uids, | |
82 | * so we look for this guy in the utmp file first, then try finding | |
83 | * him in the passwd file on basis of uid if that fails. | |
84 | */ | |
85 | ||
86 | struct utmp { | |
87 | char u_name[8]; /* User login name. */ | |
88 | char u_tty; /* typewriter character */ | |
89 | char u_cfill; /* Unused for now. */ | |
90 | long u_time; /* Login time */ | |
91 | short u_wfill; /* Unused also */ | |
92 | }; | |
93 | ||
94 | username(uid, namebuf) | |
95 | char namebuf[]; | |
96 | { | |
97 | struct utmp ubuf; | |
98 | register char *cp; | |
99 | register int tty; | |
100 | register FILE *fwho; | |
101 | ||
102 | tty = ttyn(0); | |
103 | if (tty == 'x') | |
104 | goto useuid; | |
105 | ||
106 | /* | |
107 | * Dammit, I really do have to search the utmp file! | |
108 | */ | |
109 | ||
110 | if ((fwho = fopen("/etc/utmp", "r")) == NULL) | |
111 | goto useuid; | |
112 | while (fread(&ubuf, 1, sizeof ubuf, fwho) > 0) | |
113 | if (ubuf.u_tty == tty) { | |
114 | strncpy(namebuf, ubuf.u_name, 8); | |
115 | namebuf[8] = 0; | |
116 | cp = index(namebuf, ' '); | |
117 | if (cp != NOSTR) | |
118 | *cp = 0; | |
119 | return(0); | |
120 | } | |
121 | fclose(fwho); | |
122 | ||
123 | useuid: | |
124 | return(getname(uid, namebuf)); | |
125 | } | |
126 | ||
127 | /* | |
128 | * Unix routine to do an "fopen" on file descriptor | |
129 | * The mode has to be repeated because you can't query its | |
130 | * status | |
131 | */ | |
132 | ||
133 | FILE * | |
134 | fdopen(fd, mode) | |
135 | register char *mode; | |
136 | { | |
137 | extern int errno; | |
138 | register FILE *iop; | |
139 | extern FILE *_lastbuf; | |
140 | ||
141 | for (iop = _iob; iop->_flag&(_IOREAD|_IOWRT); iop++) | |
142 | if (iop >= _lastbuf) | |
143 | return(NULL); | |
144 | iop->_cnt = 0; | |
145 | iop->_file = fd; | |
146 | if (*mode != 'r') { | |
147 | iop->_flag |= _IOWRT; | |
148 | if (*mode == 'a') | |
149 | lseek(fd, 0L, 2); | |
150 | } else | |
151 | iop->_flag |= _IOREAD; | |
152 | return(iop); | |
153 | } | |
154 | ||
155 | /* | |
156 | * Copy s2 to s1, truncating or null-padding to always copy n bytes | |
157 | * return s1 | |
158 | */ | |
159 | ||
160 | char * | |
161 | strncpy(s1, s2, n) | |
162 | register char *s1, *s2; | |
163 | { | |
164 | register i; | |
165 | register char *os1; | |
166 | ||
167 | os1 = s1; | |
168 | for (i = 0; i < n; i++) | |
169 | if ((*s1++ = *s2++) == '\0') { | |
170 | while (++i < n) | |
171 | *s1++ = '\0'; | |
172 | return(os1); | |
173 | } | |
174 | return(os1); | |
175 | } |