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annotate f-demime/initconv.c @ 2:1857d0d5a7bd

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