1 /*-
2 * Copyright (c) 2013 Jilles Tjoelker
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24 * SUCH DAMAGE.
25 */
26
27 /*
28 * Limited test program for popen() as specified by IEEE Std. 1003.1-2008,
29 * with BSD extensions.
30 */
31
32 #include <sys/param.h>
33 #include <sys/wait.h>
34 #include <errno.h>
35 #include <fcntl.h>
36 #include <signal.h>
37 #include <stdio.h>
38 #include <stdlib.h>
39 #include <string.h>
40
41 #include <atf-c.h>
42
43 static volatile sig_atomic_t got_sigpipe;
44
45 static void
sigpipe_handler(int sig __unused)46 sigpipe_handler(int sig __unused)
47 {
48 got_sigpipe = 1;
49 }
50
51 static void
check_cloexec(FILE * fp,const char * mode)52 check_cloexec(FILE *fp, const char *mode)
53 {
54 int exp_flags, flags;
55
56 flags = fcntl(fileno(fp), F_GETFD);
57 ATF_CHECK_MSG(flags != -1, "fcntl(F_GETFD) failed; errno=%d", errno);
58 if (flags == -1)
59 return;
60 if (strchr(mode, 'e') != NULL)
61 exp_flags = FD_CLOEXEC;
62 else
63 exp_flags = 0;
64 ATF_CHECK_MSG((flags & FD_CLOEXEC) == exp_flags,
65 "bad cloexec flag; %d != %d", flags, exp_flags);
66 }
67
68 ATF_TC_WITHOUT_HEAD(popen_all_modes_test);
ATF_TC_BODY(popen_all_modes_test,tc)69 ATF_TC_BODY(popen_all_modes_test, tc)
70 {
71 FILE *fp;
72 int i, status;
73 const char *mode;
74 const char *allmodes[] = { "r", "w", "r+", "re", "we", "r+e", "re+" };
75
76 for (i = 0; i < nitems(allmodes); i++) {
77 mode = allmodes[i];
78 fp = popen("exit 7", mode);
79 ATF_CHECK_MSG(fp != NULL, "popen(, \"%s\") failed", mode);
80 if (fp == NULL)
81 continue;
82 check_cloexec(fp, mode);
83 status = pclose(fp);
84 ATF_CHECK_MSG(WIFEXITED(status) && WEXITSTATUS(status) == 7,
85 "bad exit status (no I/O)");
86 }
87 }
88
89 ATF_TC_WITHOUT_HEAD(popen_rmodes_test);
ATF_TC_BODY(popen_rmodes_test,tc)90 ATF_TC_BODY(popen_rmodes_test, tc)
91 {
92 FILE *fp;
93 const char *rmodes[] = { "r", "r+", "re", "r+e", "re+" };
94 const char *mode;
95 char buf[80];
96 int i, status;
97
98 for (i = 0; i < nitems(rmodes); i++) {
99 mode = rmodes[i];
100 fp = popen("exit 9", mode);
101 ATF_CHECK_MSG(fp != NULL, "popen(, \"%s\") failed", mode);
102 if (fp == NULL)
103 continue;
104 check_cloexec(fp, mode);
105 bool input_error_1 = !(fgetc(fp) != EOF || !feof(fp) || !ferror(fp));
106 ATF_CHECK_MSG(!input_error_1, "input error 1");
107 if (input_error_1)
108 continue;
109 status = pclose(fp);
110 ATF_CHECK_MSG(WIFEXITED(status) && WEXITSTATUS(status) == 9,
111 "bad exit status (input)");
112 }
113
114 for (i = 0; i < nitems(rmodes); i++) {
115 char *sres;
116 mode = rmodes[i];
117 fp = popen("echo hi there", mode);
118 ATF_CHECK_MSG(fp != NULL, "popen(, \"%s\") failed", mode);
119 if (fp == NULL)
120 continue;
121 check_cloexec(fp, mode);
122 ATF_CHECK_MSG((sres = fgets(buf, sizeof(buf), fp)) != NULL,
123 "Input error 2");
124 if (sres != NULL)
125 ATF_CHECK_MSG(strcmp(buf, "hi there\n") == 0,
126 "Bad input 1");
127 status = pclose(fp);
128 ATF_CHECK_MSG(WIFEXITED(status) && WEXITSTATUS(status) == 0,
129 "Bad exit status (input)");
130 }
131 }
132
133 ATF_TC_WITHOUT_HEAD(popen_wmodes_test);
ATF_TC_BODY(popen_wmodes_test,tc)134 ATF_TC_BODY(popen_wmodes_test, tc)
135 {
136 FILE *fp, *fp2;
137 const char *wmodes[] = { "w", "r+", "we", "r+e", "re+" };
138 const char *mode;
139 struct sigaction act, oact;
140 int i, j, status;
141
142 for (i = 0; i < nitems(wmodes); i++) {
143 mode = wmodes[i];
144 fp = popen("read x && [ \"$x\" = abcd ]", mode);
145 ATF_CHECK_MSG(fp != NULL, "popen(, \"%s\") failed", mode);
146 if (fp == NULL)
147 continue;
148 check_cloexec(fp, mode);
149 ATF_CHECK_MSG(fputs("abcd\n", fp) != EOF,
150 "Output error 1");
151 status = pclose(fp);
152 ATF_CHECK_MSG(WIFEXITED(status) && WEXITSTATUS(status) == 0,
153 "Bad exit status (output)");
154 }
155
156 act.sa_handler = sigpipe_handler;
157 act.sa_flags = SA_RESTART;
158 sigemptyset(&act.sa_mask);
159 ATF_CHECK_MSG(sigaction(SIGPIPE, &act, &oact) != -1,
160 "sigaction() failed");
161 for (i = 0; i < nitems(wmodes); i++) {
162 mode = wmodes[i];
163 fp = popen("exit 88", mode);
164 ATF_CHECK_MSG(fp != NULL, "popen(, \"%s\") failed", mode);
165 if (fp == NULL)
166 continue;
167 check_cloexec(fp, mode);
168 got_sigpipe = 0;
169 while (fputs("abcd\n", fp) != EOF)
170 ;
171 ATF_CHECK_MSG(ferror(fp) && errno == EPIPE, "Expected EPIPE");
172 ATF_CHECK_MSG(got_sigpipe, "Expected SIGPIPE");
173 status = pclose(fp);
174 ATF_CHECK_MSG(WIFEXITED(status) && WEXITSTATUS(status) == 88,
175 "Bad exit status (EPIPE)");
176 }
177 ATF_CHECK_MSG(sigaction(SIGPIPE, &oact, NULL) != -1,
178 "sigaction() failed");
179
180 for (i = 0; i < nitems(wmodes); i++) {
181 for (j = 0; j < nitems(wmodes); j++) {
182 mode = wmodes[i];
183 fp = popen("read x", mode);
184 ATF_CHECK_MSG(fp != NULL,
185 "popen(, \"%s\") failed", mode);
186 if (fp == NULL)
187 continue;
188 mode = wmodes[j];
189 fp2 = popen("read x", mode);
190 ATF_CHECK_MSG(fp2 != NULL,
191 "popen(, \"%s\") failed", mode);
192 if (fp2 == NULL) {
193 pclose(fp);
194 continue;
195 }
196 /* If fp2 inherits fp's pipe, we will deadlock here. */
197 status = pclose(fp);
198 ATF_CHECK_MSG(WIFEXITED(status) && WEXITSTATUS(status) == 1,
199 "bad exit status (2 pipes)");
200 status = pclose(fp2);
201 ATF_CHECK_MSG(WIFEXITED(status) && WEXITSTATUS(status) == 1,
202 "bad exit status (2 pipes)");
203 }
204 }
205 }
206
207 ATF_TC_WITHOUT_HEAD(popen_rwmodes_test);
ATF_TC_BODY(popen_rwmodes_test,tc)208 ATF_TC_BODY(popen_rwmodes_test, tc)
209 {
210 const char *rwmodes[] = { "r+", "r+e", "re+" };
211 FILE *fp;
212 const char *mode;
213 char *sres;
214 char buf[80];
215 int i, ires, status;
216
217 for (i = 0; i < nitems(rwmodes); i++) {
218 mode = rwmodes[i];
219 fp = popen("read x && printf '%s\\n' \"Q${x#a}\"", mode);
220 ATF_CHECK_MSG(fp != NULL, "popen(, \"%s\") failed", mode);
221 if (fp == NULL)
222 continue;
223 check_cloexec(fp, mode);
224 ATF_CHECK_MSG((ires = fputs("abcd\n", fp)) != EOF,
225 "Output error 2");
226 if (ires != EOF) {
227 sres = fgets(buf, sizeof(buf), fp);
228 ATF_CHECK_MSG(sres != NULL, "Input error 3");
229 if (sres != NULL)
230 ATF_CHECK_MSG(strcmp(buf, "Qbcd\n") == 0,
231 "Bad input 2");
232 }
233 status = pclose(fp);
234 ATF_CHECK_MSG(WIFEXITED(status) && WEXITSTATUS(status) == 0,
235 "bad exit status (I/O)");
236 }
237 }
238
ATF_TP_ADD_TCS(tp)239 ATF_TP_ADD_TCS(tp)
240 {
241
242 ATF_TP_ADD_TC(tp, popen_all_modes_test);
243 ATF_TP_ADD_TC(tp, popen_rmodes_test);
244 ATF_TP_ADD_TC(tp, popen_wmodes_test);
245 ATF_TP_ADD_TC(tp, popen_rwmodes_test);
246
247 return (atf_no_error());
248 }
249