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comparison f-demime/initconv.c @ 0:7e0d08176f32

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f-demime starting code
author Mychaela Falconia <falcon@freecalypso.org>
date Sat, 06 May 2023 06:14:03 +0000
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-1:000000000000 0:7e0d08176f32
1 /*
2 * This module contains functions that implement initiation of various
3 * conversions performed by f-demime.
4 */
5
6 #include <stdio.h>
7 #include <stdlib.h>
8 #include <string.h>
9 #include <strings.h>
10 #include <unistd.h>
11 #include "defs.h"
12
13 extern enum msg_state msg_state;
14 extern char cont_te_buf[HDR_BUF_SIZE];
15 extern int got_cont_type, got_cont_te;
16 extern char *att_filename_base;
17 extern int qpdec_err_flag;
18
19 void (*dec_outf)();
20 FILE *tempfile;
21 int text_is_utf8;
22
23 static int
24 create_tempfile()
25 {
26 char template[16];
27 int fd;
28
29 strcpy(template, "/tmp/fdemXXXXXX");
30 fd = mkstemp(template);
31 if (fd < 0) {
32 perror("mkstemp");
33 return(-1);
34 }
35 unlink(template);
36 tempfile = fdopen(fd, "r+w");
37 if (!tempfile) {
38 perror("fdopen");
39 close(fd);
40 return(-1);
41 }
42 return(0);
43 }
44
45 static int
46 init_tempfile()
47 {
48 int rc;
49
50 rc = create_tempfile();
51 if (!rc)
52 return(0);
53 if (got_cont_te)
54 fputs(cont_te_buf, stdout);
55 puts("X-Fdemime-Error: unable to create temp file for conversion");
56 putchar('\n');
57 msg_state = MSG_STATE_BODY_PASS;
58 return(-1);
59 }
60
61 static void
62 implicit_text_plain()
63 {
64 if (!got_cont_type)
65 puts("Content-Type: text/plain (f-demime implied)");
66 }
67
68 static void
69 grok_charset_attr(csa)
70 char *csa;
71 {
72 text_is_utf8 = !strcasecmp(csa, "UTF-8") || !strcmp(csa, "csUTF8");
73 }
74
75 void
76 init_base64_text_plain(charset_attr)
77 char *charset_attr;
78 {
79 implicit_text_plain();
80 if (init_tempfile() < 0)
81 return;
82 grok_charset_attr(charset_attr);
83 base64_dec_init();
84 ptext_conv_init();
85 msg_state = MSG_STATE_PTEXT_B64;
86 }
87
88 void
89 init_qp_text_plain(charset_attr)
90 char *charset_attr;
91 {
92 implicit_text_plain();
93 if (init_tempfile() < 0)
94 return;
95 grok_charset_attr(charset_attr);
96 qpdec_err_flag = 0;
97 ptext_conv_init();
98 msg_state = MSG_STATE_PTEXT_QP;
99 }
100
101 void
102 init_base64_text_other()
103 {
104 if (init_tempfile() < 0)
105 return;
106 base64_dec_init();
107 b2q_conv_init();
108 msg_state = MSG_STATE_B64_TO_QP;
109 }
110
111 void
112 init_base64_nontext()
113 {
114 fputs(cont_te_buf, stdout);
115 if (init_attach_out() < 0) {
116 puts("X-Fdemime-Error: unable to create save file");
117 putchar('\n');
118 msg_state = MSG_STATE_BODY_PASS;
119 return;
120 }
121 printf("X-Fdemime-Saved: %s\n", att_filename_base);
122 base64_dec_init();
123 msg_state = MSG_STATE_BLOB_B64;
124 }