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annotate tests/test-posix_spawn4.c @ 39848:b7ec445e40de

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posix_spawn tests: Fix link error on 64-bit Cygwin. * tests/test-posix_spawn1.c (environ): Remove declaration. * tests/test-posix_spawn2.c (environ): Likewise. * tests/test-posix_spawn3.c (environ): Likewise. * tests/test-posix_spawn4.c (environ): Likewise. * modules/posix_spawn-tests (Depends-on): Add 'environ'. * modules/posix_spawnp-tests (Depends-on): Likewise.
author Bruno Haible <bruno@clisp.org>
date Tue, 18 Sep 2018 20:18:38 +0200
parents aa6d47aae153
children b06060465f09
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
39829
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1 /* Test of posix_spawn() function with 'chdir' action.
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2 Copyright (C) 2008-2018 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 <https://www.gnu.org/licenses/>. */
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16
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17 /* Written by Bruno Haible <bruno@clisp.org>, 2018. */
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18
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19 #include <config.h>
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20
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21 #include <spawn.h>
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22
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23 #include <errno.h>
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24 #include <fcntl.h>
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25 #include <signal.h>
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26 #include <stdbool.h>
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27 #include <stdio.h>
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28 #include <stdlib.h>
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29 #include <string.h>
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30 #include <unistd.h>
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31 #include <sys/types.h>
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32 #include <sys/wait.h>
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33
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34 static int
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35 fd_safer (int fd)
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36 {
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37 if (0 <= fd && fd <= 2)
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38 {
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39 int f = fd_safer (dup (fd));
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40 int e = errno;
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41 close (fd);
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42 errno = e;
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43 fd = f;
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44 }
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45
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46 return fd;
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47 }
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48
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49 int
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50 main ()
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51 {
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52 char *argv[2] = { (char *) "pwd", NULL };
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53 int ifd[2];
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54 sigset_t blocked_signals;
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55 sigset_t fatal_signal_set;
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56 posix_spawn_file_actions_t actions;
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57 bool actions_allocated;
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58 posix_spawnattr_t attrs;
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59 bool attrs_allocated;
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60 int err;
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61 pid_t child;
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62 int fd;
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63 FILE *fp;
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64 char line[80];
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65 int status;
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66 int exitstatus;
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67
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68 if (pipe (ifd) < 0 || (ifd[0] = fd_safer (ifd[0])) < 0)
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69 {
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70 perror ("cannot create pipe");
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71 exit (1);
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72 }
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73 sigprocmask (SIG_SETMASK, NULL, &blocked_signals);
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74 sigemptyset (&fatal_signal_set);
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75 sigaddset (&fatal_signal_set, SIGINT);
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76 sigaddset (&fatal_signal_set, SIGTERM);
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77 sigaddset (&fatal_signal_set, SIGHUP);
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78 sigaddset (&fatal_signal_set, SIGPIPE);
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79 sigprocmask (SIG_BLOCK, &fatal_signal_set, NULL);
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80 actions_allocated = false;
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81 attrs_allocated = false;
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82 if ((err = posix_spawn_file_actions_init (&actions)) != 0
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83 || (actions_allocated = true,
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84 (err = posix_spawn_file_actions_adddup2 (&actions, ifd[1], STDOUT_FILENO)) != 0
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85 || (err = posix_spawn_file_actions_addclose (&actions, ifd[1])) != 0
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86 || (err = posix_spawn_file_actions_addclose (&actions, ifd[0])) != 0
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87 || (err = posix_spawn_file_actions_addopen (&actions, STDIN_FILENO, "/dev/null", O_RDONLY, 0)) != 0
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88 || (err = posix_spawn_file_actions_addchdir (&actions, "/")) != 0
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89 || (err = posix_spawnattr_init (&attrs)) != 0
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90 || (attrs_allocated = true,
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91 (err = posix_spawnattr_setsigmask (&attrs, &blocked_signals)) != 0
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92 || (err = posix_spawnattr_setflags (&attrs, POSIX_SPAWN_SETSIGMASK)) != 0)
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93 || (err = posix_spawnp (&child, "pwd", &actions, &attrs, argv, environ)) != 0))
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94 {
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95 if (actions_allocated)
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96 posix_spawn_file_actions_destroy (&actions);
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97 if (attrs_allocated)
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98 posix_spawnattr_destroy (&attrs);
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99 sigprocmask (SIG_UNBLOCK, &fatal_signal_set, NULL);
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100 errno = err;
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101 perror ("subprocess failed");
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102 exit (1);
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103 }
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104 posix_spawn_file_actions_destroy (&actions);
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105 posix_spawnattr_destroy (&attrs);
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106 sigprocmask (SIG_UNBLOCK, &fatal_signal_set, NULL);
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107 close (ifd[1]);
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108 fd = ifd[0];
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109 fp = fdopen (fd, "r");
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110 if (fp == NULL)
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111 {
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112 fprintf (stderr, "fdopen() failed\n");
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113 exit (1);
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114 }
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115 if (fread (line, 1, 80, fp) < 2)
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116 {
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117 fprintf (stderr, "could not read expected output\n");
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118 exit (1);
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119 }
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120 if (memcmp (line, "/\n", 2) != 0)
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121 {
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122 fprintf (stderr, "read output is not the expected output");
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123 exit (1);
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124 }
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125 fclose (fp);
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126 status = 0;
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127 while (waitpid (child, &status, 0) != child)
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128 ;
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129 if (!WIFEXITED (status))
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130 {
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131 fprintf (stderr, "subprocess terminated with unexpected wait status %d\n", status);
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132 exit (1);
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133 }
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134 exitstatus = WEXITSTATUS (status);
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135 if (exitstatus != 0)
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136 {
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137 fprintf (stderr, "subprocess terminated with unexpected exit status %d\n", exitstatus);
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138 exit (1);
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139 }
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140 return 0;
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141 }