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annotate tests/test-passfd.c @ 17356:639f60219717

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tests: make it easier to bypass alarm time in debugger While auditing alarm usage, I noticed that test-regex had a nice idiom that made it easier to disable an alarm under glibc. Use it elsewhere, so future copy-and-paste will preserve the idiom. * tests/test-file-has-acl.c (main): Allow gdb to override alarm. * tests/test-memmem.c (main): Likewise. * tests/test-passfd.c (main): Likewise. * tests/test-ptsname.c (main): Likewise. * tests/test-ptsname_r.c (main): Likewise. * tests/test-strcasestr.c (main): Likewise. * tests/test-strstr.c (main): Likewise. Signed-off-by: Eric Blake <eblake@redhat.com>
author Eric Blake <eblake@redhat.com>
date Mon, 11 Mar 2013 15:40:32 -0600
parents e542fd46ad6f
children c67bafa8ca26
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1 /* Test of passing file descriptors.
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2 Copyright (C) 2011-2013 Free Software Foundation, Inc.
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3
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4 This program is free software: you can redistribute it and/or modify
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5 it under the terms of the GNU General Public License as published by
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6 the Free Software Foundation; either version 3 of the License, or
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7 (at your option) any later version.
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8
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9 This program is distributed in the hope that it will be useful,
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10 but WITHOUT ANY WARRANTY; without even the implied warranty of
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11 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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12 GNU General Public License for more details.
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13
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14 You should have received a copy of the GNU General Public License
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15 along with this program. If not, see <http://www.gnu.org/licenses/>. */
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16
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17 #include <config.h>
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18
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19 #include "passfd.h"
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20
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21 #include <errno.h>
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22 #include <fcntl.h>
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23 #include <signal.h>
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24 #include <stdlib.h>
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25 #include <stdio.h>
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26 #include <unistd.h>
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27 #include <sys/types.h>
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28 #include <sys/socket.h>
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29 #include <sys/stat.h>
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30 #include <sys/wait.h>
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31
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32 #include "macros.h"
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33
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34 int
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35 main ()
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36 {
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37 #if HAVE_SOCKETPAIR
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38 int pair[2];
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39 int ret;
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40 pid_t pid;
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41 int status;
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42 int fdnull;
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43 int fd;
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44 struct stat st;
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45
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46 # if HAVE_DECL_ALARM
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47 /* Avoid hanging on failure. */
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48 int alarm_value = 5;
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49 signal (SIGALRM, SIG_DFL);
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50 alarm (alarm_value);
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51 # endif
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52
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53 fdnull = open ("/dev/null", O_RDWR);
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54 if (fdnull < 0)
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55 {
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56 perror ("Could not open /dev/null");
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57 return 1;
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58 }
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59
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60 ret = socketpair (AF_UNIX, SOCK_STREAM, 0, pair);
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61 if (ret < 0)
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62 {
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63 perror ("socket pair failed");
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64 return 2;
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65 }
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66
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67 pid = fork ();
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68 if (pid == -1)
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69 {
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70 perror ("fork");
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71 return 3;
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72 }
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73 if (pid == 0)
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74 {
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75 ret = sendfd (pair[1], fdnull);
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76 if (ret == -1)
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77 {
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78 perror ("sendfd");
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79 return 64;
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80 }
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81 return 0;
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82 }
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83 /* father */
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84 else
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85 {
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86 fd = recvfd (pair[0], 0);
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87 if (fd == -1)
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88 {
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89 perror ("recvfd");
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90 return 16;
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91 }
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92 ret = waitpid (pid, &status, 0);
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93 if (ret == -1)
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94 {
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95 perror ("waitpid");
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96 return 17;
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97 }
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98 ASSERT (ret == pid);
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99
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100 if (!WIFEXITED (status))
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101 {
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102 fprintf (stderr, "Child does not normally exit\n");
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103 return 65;
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104 }
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105 ret = WEXITSTATUS (status);
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106 if (ret != 0)
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107 {
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108 fprintf (stderr, "Send fd fail\n");
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109 return ret;
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110 }
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111
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112 /* try to stat new fd */
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113 ret = fstat (fd, &st);
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114 if (ret < 0)
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115 {
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116 perror ("fstat");
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117 return 80;
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118 }
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119 return 0;
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120 }
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121 #else
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122 errno = 0;
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123 ASSERT(sendfd (0, 0) == -1);
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124 ASSERT(errno == ENOSYS);
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125
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126 errno = 0;
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127 ASSERT(recvfd (0, 0) == -1);
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128 ASSERT(errno == ENOSYS);
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129
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130 fputs ("skipping test: socketpair not supported on this system\n",
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131 stderr);
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132 return 77;
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133 #endif
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134 }