1 /*
2 ** Copyright 2001-2003 Double Precision, Inc. See COPYING for
3 ** distribution information.
4 */
5
6 static const char rcsid[]="$Id: libgpg.c,v 1.2 2003/06/02 23:47:16 mrsam Exp $";
7
8 #include "config.h"
9 #include <stdio.h>
10 #include <stdlib.h>
11 #include <string.h>
12 #include <unistd.h>
13 #include <signal.h>
14 #include <errno.h>
15 #include <sys/types.h>
16 #include <sys/stat.h>
17 #if HAVE_SYS_TIME_H
18 #include <sys/time.h>
19 #endif
20 #if HAVE_SYS_WAIT_H
21 #include <sys/wait.h>
22 #endif
23 #ifndef WEXITSTATUS
24 #define WEXITSTATUS(stat_val) ((unsigned)(stat_val) >> 8)
25 #endif
26 #ifndef WIFEXITED
27 #define WIFEXITED(stat_val) (((stat_val) & 255) == 0)
28 #endif
29
30 #include "gpg.h"
31 #include "gpglib.h"
32
33 int libmail_gpg_stdin= -1, libmail_gpg_stdout= -1,
34 libmail_gpg_stderr= -1;
35 pid_t libmail_gpg_pid= -1;
36
libmail_gpg_cleanup()37 int libmail_gpg_cleanup()
38 {
39 int rc=0;
40
41 if (libmail_gpg_stdin >= 0)
42 {
43 close(libmail_gpg_stdin);
44 libmail_gpg_stdin= -1;
45 }
46
47 if (libmail_gpg_stdout >= 0)
48 {
49 close(libmail_gpg_stdout);
50 libmail_gpg_stdout= -1;
51 }
52
53 if (libmail_gpg_stderr >= 0)
54 {
55 close(libmail_gpg_stderr);
56 libmail_gpg_stderr= -1;
57 }
58
59 if (libmail_gpg_pid >= 0 && kill(libmail_gpg_pid, 0) >= 0)
60 {
61 int waitstat;
62 pid_t p;
63
64 while ((p=wait(&waitstat)) != libmail_gpg_pid)
65 {
66 if (p < 0 && errno == ECHILD)
67 return (-1);
68 }
69
70 rc= WIFEXITED(waitstat) ? WEXITSTATUS(waitstat): -1;
71 libmail_gpg_pid= -1;
72 }
73 return (rc);
74 }
75
optionfile(const char * gpgdir)76 static char *optionfile(const char *gpgdir)
77 {
78 char *p=malloc(strlen(gpgdir)+sizeof("/options"));
79
80 if (p)
81 strcat(strcpy(p, gpgdir), "/options");
82 return (p);
83 }
84
85 /*
86 ** Determine of GPG is available by checking for the options file, and the
87 ** gpg binary itself.
88 */
89
libmail_gpg_has_gpg(const char * gpgdir)90 int libmail_gpg_has_gpg(const char *gpgdir)
91 {
92 char *p=optionfile(gpgdir);
93 struct stat stat_buf;
94 int rc;
95
96 if (!p)
97 return (-1);
98
99 rc=stat(p, &stat_buf);
100 free(p);
101 if (rc == 0)
102 rc=stat(GPG, &stat_buf);
103
104 return (rc);
105 }
106