1 /*
2 ** seq_save.c -- 1) synchronize sequences
3 ** -- 2) save public sequences
4 **
5 ** This code is Copyright (c) 2002, by the authors of nmh. See the
6 ** COPYRIGHT file in the root directory of the nmh distribution for
7 ** complete copyright information.
8 */
9
10 #include <h/mh.h>
11 #include <h/signals.h>
12 #include <unistd.h>
13
14
15 /*
16 ** 1. If sequence is public and folder is readonly,
17 ** then change it to be private
18 ** 2a. If sequence is public, then add it to the sequences file
19 ** in folder (name specified by mh-sequences profile entry).
20 ** 2b. If sequence is private, then add it to the
21 ** context file.
22 */
23
24 void
seq_save(struct msgs * mp)25 seq_save(struct msgs *mp)
26 {
27 int i;
28 char flags, *cp, attr[BUFSIZ], seqfile[PATH_MAX];
29 FILE *fp;
30 sigset_t set, oset;
31
32 /* check if sequence information has changed */
33 if (!(mp->msgflags & SEQMOD))
34 return;
35 mp->msgflags &= ~SEQMOD;
36
37 fp = NULL;
38 flags = mp->msgflags; /* record folder flags */
39
40 /*
41 ** If no mh-sequences file is defined, or if a mh-sequences file
42 ** is defined but empty (*mh_seq == '\0'), then pretend folder
43 ** is readonly. This will force all sequences to be private.
44 */
45 if (mh_seq == NULL || *mh_seq == '\0')
46 set_readonly(mp);
47 else
48 snprintf(seqfile, sizeof(seqfile), "%s/%s", mp->foldpath,
49 mh_seq);
50
51 for (i = 0; mp->msgattrs[i]; i++) {
52 snprintf(attr, sizeof(attr), "atr-%s-%s", mp->msgattrs[i],
53 mp->foldpath);
54
55 /* get space separated list of sequence ranges */
56 if (!(cp = seq_list(mp, mp->msgattrs[i]))) {
57 context_del(attr); /* delete sequence from context */
58 continue;
59 }
60
61 if (is_readonly(mp) || is_seq_private(mp, i)) {
62 priv:
63 /* sequence is private */
64 context_replace(attr, cp); /* update seq in ctx */
65 } else {
66 /* sequence is public */
67 context_del(attr); /* delete sequence from context */
68
69 if (!fp) {
70 /*
71 ** Attempt to open file for public sequences.
72 ** If that fails (probably because folder is
73 ** readonly), then make sequence private.
74 */
75 if ((fp = lkfopen(seqfile, "w")) == NULL
76 && (unlink(seqfile) == -1 ||
77 (fp = lkfopen(seqfile, "w"))
78 == NULL)) {
79 admonish(attr, "unable to write");
80 goto priv;
81 }
82
83 /* block a few signals */
84 sigemptyset(&set);
85 sigaddset(&set, SIGHUP);
86 sigaddset(&set, SIGINT);
87 sigaddset(&set, SIGQUIT);
88 sigaddset(&set, SIGTERM);
89 sigprocmask(SIG_BLOCK, &set, &oset);
90 }
91 fprintf(fp, "%s: %s\n", mp->msgattrs[i], cp);
92 }
93 }
94
95 if (fp) {
96 lkfclose(fp, seqfile);
97 sigprocmask(SIG_SETMASK, &oset, &set); /* reset signal mask */
98 } else {
99 /*
100 ** If folder is not readonly, and we didn't save any
101 ** public sequences, then remove that file.
102 */
103 if (!is_readonly(mp))
104 unlink(seqfile);
105 }
106
107 /*
108 ** Reset folder flag, since we may be
109 ** pretending that folder is readonly.
110 */
111 mp->msgflags = flags;
112 }
113