Merge branch 'dbmjz'
[exim.git] / test / src / fd.c
1 /* A program to check on open file descriptors. There are some weird options
2 for running it in Exim testing. If -q is given, make output suitable for
3 queryprogram. If -f is given, copy the input as for a transport filter. If -s
4 is given, add extra output from stat(). */
5
6 #include <stdio.h>
7 #include <stdlib.h>
8 #include <string.h>
9 #include <sys/types.h>
10 #include <fcntl.h>
11 #include <limits.h>
12 #include <errno.h>
13 #include <sys/stat.h>
14 #include <unistd.h>
15
16
17 /* The way of finding out the maximum file descriptor various between OS.
18 Most have sysconf(), but a few don't. */
19
20 #ifdef _SC_OPEN_MAX
21 #define mac_maxfd (sysconf(_SC_OPEN_MAX) - 1)
22 #elif defined OPEN_MAX
23 #define mac_maxfd (OPEN_MAX - 1)
24 #elif defined NOFILE
25 #define mac_maxfd (NOFILE - 1)
26 #else
27 #define mac_maxfd 255; /* just in case */
28 #endif
29
30
31 int main(int argc, char **argv)
32 {
33 int fd;
34 int qpgm = 0;
35 int filter = 0;
36 int use_stat = 0;
37 struct stat statbuf;
38 char buffer[8192];
39 char *p = buffer;
40
41 while (argc > 1)
42 {
43 char *arg = argv[--argc];
44 if (strcmp(arg, "-q") == 0) qpgm = 1;
45 if (strcmp(arg, "-f") == 0) filter = 1;
46 if (strcmp(arg, "-s") == 0) use_stat = 1;
47 }
48
49 if (filter)
50 {
51 int len;
52 while ((len = read(0, buffer, sizeof(buffer))) > 0)
53 write(1, buffer, len);
54 }
55
56 p += sprintf(p, "max fd = %d\n", (int)mac_maxfd);
57
58 for (fd = 0; fd <= mac_maxfd; fd++)
59 {
60 int options = fcntl(fd, F_GETFD);
61 if (options >= 0)
62 {
63 int status = fcntl(fd, F_GETFL);
64 p += sprintf(p, "%3d opt=%d status=%X ", fd, options, status);
65 switch(status & 3)
66 {
67 case 0: p += sprintf(p, "RDONLY");
68 break;
69 case 1: p += sprintf(p, "WRONLY");
70 break;
71 case 2: p += sprintf(p, "RDWR");
72 break;
73 }
74 if (isatty(fd)) p += sprintf(p, " TTY");
75 if ((status & 8) != 0) p += sprintf(p, " APPEND");
76
77 if (use_stat && fstat(fd, &statbuf) >= 0)
78 {
79 p += sprintf(p, " mode=%o uid=%d size=%d", (int)statbuf.st_mode,
80 (int)statbuf.st_uid, (int)statbuf.st_size);
81 }
82
83 p += sprintf(p, "\n");
84 }
85 else if (errno != EBADF)
86 {
87 p += sprintf(p, "%3d errno=%d %s\n", fd, errno, strerror(errno));
88 }
89 }
90
91 if (qpgm)
92 {
93 for (p = buffer; *p != 0; p++)
94 if (*p == '\n') *p = ' ';
95 printf("ACCEPT DATA=\"%s\"\n", buffer);
96 }
97 else printf("%s", buffer);
98
99 exit(0);
100 }
101
102 /* End */