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comparison f-demime/attach_out.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 code for creating (writing) secondary output files
3 * intended for storing attached base64 blobs.
4 */
5
6 #include <sys/file.h>
7 #include <stdio.h>
8 #include <stdlib.h>
9 #include <string.h>
10 #include <strings.h>
11 #include <unistd.h>
12 #include "defs.h"
13
14 extern char *att_filename_buf, *att_filename_tail;
15 extern void (*dec_outf)();
16
17 static unsigned att_count;
18 static FILE *att_outf;
19 static int giveup_flag;
20
21 static void
22 output_func(ch)
23 {
24 putc(ch, att_outf);
25 }
26
27 init_attach_out()
28 {
29 int fd;
30
31 if (giveup_flag)
32 return(-1);
33 for (;;) {
34 if (att_count >= 10000) {
35 giveup_flag = 1;
36 return(-1);
37 }
38 sprintf(att_filename_tail, "%04u", att_count++);
39 fd = open(att_filename_buf, O_WRONLY|O_CREAT|O_EXCL, 0644);
40 if (fd >= 0)
41 break;
42 }
43 att_outf = fdopen(fd, "w");
44 if (!att_outf) {
45 perror("fdopen");
46 close(fd);
47 return(-1);
48 }
49 dec_outf = output_func;
50 return(0);
51 }
52
53 void
54 attach_out_finish()
55 {
56 fclose(att_outf);
57 }