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tests/dup.c
87 строк
2 KB
Dmitry V. Levin
Update copyright headers
30 апр 2023, 11:00
30 апр 2023, 11:00
eb30d4d
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/* * Check decoding of dup syscall. * * Copyright (c) 2016-2023 The strace developers. * All rights reserved. * * SPDX-License-Identifier: GPL-2.0-or-later */ #include "tests.h" #include "scno.h" #include <stdio.h> #include <unistd.h> #ifndef FD0_PATH # define FD0_PATH "" #endif #ifndef FD9_PATH # define FD9_PATH "" #endif #ifndef SKIP_IF_PROC_IS_UNAVAILABLE # define SKIP_IF_PROC_IS_UNAVAILABLE #endif #ifndef TRACE_FDS # define TRACE_FDS 0 #endif #ifndef PATH_TRACING # define PATH_TRACING 0 #endif #ifndef TRACE_FD_0 # define TRACE_FD_0 (!TRACE_FDS && !PATH_TRACING) #endif #ifndef TRACE_OTHER_FDS # define TRACE_OTHER_FDS (!TRACE_FDS && !PATH_TRACING) #endif #ifndef TRACE_FD_9 # define TRACE_FD_9 (!TRACE_FDS && !PATH_TRACING) #endif static const char *errstr; static long k_dup(const unsigned int fd) { const kernel_ulong_t fill = (kernel_ulong_t) 0xdefaced00000000ULL; const kernel_ulong_t bad = (kernel_ulong_t) 0xbadc0dedbadc0dedULL; const kernel_ulong_t arg1 = fill | fd; const long rc = syscall(__NR_dup, arg1, bad, bad, bad, bad, bad); errstr = sprintrc(rc); return rc; } int main(void) { SKIP_IF_PROC_IS_UNAVAILABLE; k_dup(-1); #if !PATH_TRACING && !TRACE_FDS printf("dup(-1) = %s\n", errstr); #endif int d1 = k_dup(0); #if TRACE_FD_0 printf("dup(0" FD0_PATH ") = %d" FD0_PATH "\n", d1); #endif int d2 = k_dup(d1); #if TRACE_OTHER_FDS printf("dup(%d" FD0_PATH ") = %d" FD0_PATH "\n", d1, d2); #endif d2 = k_dup(9); #if PATH_TRACING || TRACE_FD_9 printf("dup(9" FD9_PATH ") = %d" FD9_PATH "\n", d2); #endif d1 = k_dup(d2); #if PATH_TRACING || TRACE_OTHER_FDS printf("dup(%d" FD9_PATH ") = %d" FD9_PATH "\n", d2, d1); #endif puts("+++ exited with 0 +++"); return 0; }