b999d48941
We're losing the svn history (which we could probably keep if we tried hard enough) but don't consider that worthwhile. Note these tests are destructive, so run them only in a throwaway environment like a chroot, container, or vm. The tests/run.all script should be the one which launches all the tests. Signed-off-by: Serge Hallyn <serge.hallyn@ubuntu.com>
52 lines
1.1 KiB
C
52 lines
1.1 KiB
C
/*
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* gcc open_RDONLY_failure.c -o open_RDONLY_failure.so -shared -ldl
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* LD_PRELOAD=./open_RDONLY_failure.so FAILURE_PATH=/etc/shadow ./test /etc/shadow
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*/
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#define _GNU_SOURCE
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#include <dlfcn.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <stdarg.h>
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#include <fcntl.h>
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#include <string.h>
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#include <errno.h>
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#include <assert.h>
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#include <stdio.h>
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#include <stdlib.h>
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typedef int (*open_type) (const char *pathname, int flag, ...);
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static open_type next_open64;
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static const char *failure_path = NULL;
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int open64 (const char *pathname, int flag, ...)
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{
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if (NULL == next_open64)
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{
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next_open64 = dlsym (RTLD_NEXT, "open64");
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assert (NULL != next_open64);
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}
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if (NULL == failure_path) {
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failure_path = getenv ("FAILURE_PATH");
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if (NULL == failure_path) {
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fputs ("No FAILURE_PATH defined\n", stderr);
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}
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}
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if ( (NULL != pathname)
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&& ((flag & O_ACCMODE) == O_RDONLY)
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&& (NULL != failure_path)
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&& (strcmp (pathname, failure_path) == 0))
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{
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fprintf (stderr, "open FAILURE %s %x ...\n", pathname, flag&O_ACCMODE);
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errno = EIO;
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return -1;
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}
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return next_open64 (pathname, flag);
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}
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