2 * Check decoding of setgroups/setgroups32 syscalls.
4 * Copyright (c) 2016 Dmitry V. Levin <ldv@altlinux.org>
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8 * modification, are permitted provided that the following conditions
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30 #ifdef __NR_setgroups32
32 # define SYSCALL_NR __NR_setgroups32
33 # define SYSCALL_NAME "setgroups32"
34 # define GID_TYPE unsigned int
39 # include <asm/unistd.h>
41 # ifdef __NR_setgroups
43 # define SYSCALL_NR __NR_setgroups
44 # define SYSCALL_NAME "setgroups"
45 # if defined __NR_setgroups32 && __NR_setgroups != __NR_setgroups32
46 # define GID_TYPE unsigned short
48 # define GID_TYPE unsigned int
63 /* check how the first argument is decoded */
64 if (syscall(SYSCALL_NR, 0, 0))
65 printf("%s(0, NULL) = -1 %s (%m)\n", SYSCALL_NAME, errno2name());
67 printf("%s(0, NULL) = 0\n", SYSCALL_NAME);
69 if (syscall(SYSCALL_NR, (long) 0xffffffff00000000ULL, 0))
70 printf("%s(0, NULL) = -1 %s (%m)\n",
71 SYSCALL_NAME, errno2name());
73 printf("%s(0, NULL) = 0\n", SYSCALL_NAME);
75 syscall(SYSCALL_NR, 1, 0);
76 printf("%s(1, NULL) = -1 %s (%m)\n", SYSCALL_NAME, errno2name());
78 syscall(SYSCALL_NR, (long) 0xffffffff00000001ULL, 0);
79 printf("%s(1, NULL) = -1 %s (%m)\n", SYSCALL_NAME, errno2name());
81 syscall(SYSCALL_NR, -1U, 0);
82 printf("%s(%u, NULL) = -1 %s (%m)\n", SYSCALL_NAME, -1U, errno2name());
84 syscall(SYSCALL_NR, -1L, 0);
85 printf("%s(%u, NULL) = -1 %s (%m)\n", SYSCALL_NAME, -1U, errno2name());
87 /* check how the second argument is decoded */
88 const GID_TYPE *const g1 = tail_alloc(sizeof(*g1));
89 GID_TYPE *const g2 = tail_alloc(sizeof(*g2) * 2);
90 GID_TYPE *const g3 = tail_alloc(sizeof(*g3) * 3);
92 if (syscall(SYSCALL_NR, 0, g1 + 1))
93 printf("%s(0, []) = -1 %s (%m)\n",
94 SYSCALL_NAME, errno2name());
96 printf("%s(0, []) = 0\n", SYSCALL_NAME);
98 if (syscall(SYSCALL_NR, 1, g1))
99 printf("%s(1, [%u]) = -1 %s (%m)\n",
100 SYSCALL_NAME, (unsigned) *g1, errno2name());
102 printf("%s(1, [%u]) = 0\n",
103 SYSCALL_NAME, (unsigned) *g1);
105 syscall(SYSCALL_NR, 1, g1 + 1);
106 printf("%s(1, %p) = -1 %s (%m)\n",
107 SYSCALL_NAME, g1 + 1, errno2name());
109 syscall(SYSCALL_NR, 1, -1L);
110 printf("%s(1, %#lx) = -1 %s (%m)\n", SYSCALL_NAME, -1L, errno2name());
112 syscall(SYSCALL_NR, 2, g1);
113 printf("%s(2, [%u, %p]) = -1 %s (%m)\n",
114 SYSCALL_NAME, (unsigned) *g1, g1 + 1, errno2name());
118 if (syscall(SYSCALL_NR, 2, g2))
119 printf("%s(2, [%u, %u]) = -1 %s (%m)\n", SYSCALL_NAME,
120 (unsigned) g2[0], (unsigned) g2[1], errno2name());
122 printf("%s(2, [%u, %u]) = 0\n", SYSCALL_NAME,
123 (unsigned) g2[0], (unsigned) g2[1]);
125 syscall(SYSCALL_NR, 3, g2);
126 printf("%s(3, [%u, %u, %p]) = -1 %s (%m)\n", SYSCALL_NAME,
127 (unsigned) g2[0], (unsigned) g2[1], g2 + 2, errno2name());
131 if (syscall(SYSCALL_NR, 3, g3))
132 printf("%s(3, [%u, %u, ...]) = -1 %s (%m)\n", SYSCALL_NAME,
133 (unsigned) g3[0], (unsigned) g3[1], errno2name());
135 printf("%s(3, [%u, %u]) = 0\n", SYSCALL_NAME,
136 (unsigned) g3[0], (unsigned) g3[1]);
138 syscall(SYSCALL_NR, 4, g3);
139 printf("%s(4, [%u, %u, ...]) = -1 %s (%m)\n", SYSCALL_NAME,
140 (unsigned) g3[0], (unsigned) g3[1], errno2name());
142 long rc = sysconf(_SC_NGROUPS_MAX);
143 const unsigned ngroups_max = rc;
145 if ((unsigned long) rc == ngroups_max && (int) ngroups_max > 0) {
146 syscall(SYSCALL_NR, ngroups_max, g3);
147 printf("%s(%u, [%u, %u, ...]) = -1 %s (%m)\n", SYSCALL_NAME,
148 ngroups_max, (unsigned) g3[0], (unsigned) g3[1],
151 const unsigned long size =
152 (unsigned long) 0xffffffff00000000ULL | ngroups_max;
153 syscall(SYSCALL_NR, size, g3);
154 printf("%s(%u, [%u, %u, ...]) = -1 %s (%m)\n", SYSCALL_NAME,
155 ngroups_max, (unsigned) g3[0], (unsigned) g3[1],
158 syscall(SYSCALL_NR, ngroups_max + 1, g3);
159 printf("%s(%u, %p) = -1 %s (%m)\n", SYSCALL_NAME,
160 ngroups_max + 1, g3, errno2name());
163 puts("+++ exited with 0 +++");
169 SKIP_MAIN_UNDEFINED("__NR_setgroups")