mirror of
https://gitlab.com/apparmor/apparmor.git
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104 lines
2.2 KiB
C
104 lines
2.2 KiB
C
/* pwrite/pread - matt */
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/*
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* Copyright (C) 2002-2005 Novell/SUSE
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation, version 2 of the
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* License.
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*/
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#define _XOPEN_SOURCE 500
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#include <unistd.h>
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <errno.h>
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#include <stdio.h>
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#include <string.h>
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#include <signal.h>
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static int gotsignal;
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void handler (int sig) {
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++gotsignal;
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}
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int main (int argc, char *argv[]) {
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int fd, pass;
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ssize_t ret;
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const char * bugger = "pwrite test";
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char in_buffer[strlen(bugger) +1];
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sigset_t sigset;
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if (argc != 2) {
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fprintf(stderr, "Usage: %s <file>\n", argv[0]);
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return(1);
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}
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if (signal(SIGUSR1, handler) == SIG_ERR) {
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fprintf(stderr, "FAIL - signal failed %s\n",
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strerror(errno));
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return(1);
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}
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if (sigemptyset(&sigset) == -1) {
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fprintf(stderr, "FAIL - sigemptyset\n");
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return(1);
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}
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fd = open(argv[1], O_CREAT|O_RDWR, S_IWUSR|S_IRUSR);
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if (fd == -1) {
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fprintf(stderr, "FAIL: open %s failed - %s\n",
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argv[1], strerror(errno));
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return(1);
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}
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pass=1;
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/* Try to write to the file */
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nextpass:
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ret = pwrite(fd, bugger, strlen(bugger), 0);
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if (ret == 0) {
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fprintf(stderr, "FAIL: pwrite failed - 0 bytes written\n");
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return(1);
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} else if (ret == -1) {
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fprintf(stderr, "FAIL: pwrite failed - %s\n",
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strerror(errno));
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return(1);
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} else if (ret != strlen(bugger)) {
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fprintf(stderr, "FAIL: pwrite failed - wrote %i expected %i\n",
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ret, strlen(bugger));
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return(1);
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}
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/* Cool, now try to read the file */
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ret = pread(fd, in_buffer, strlen(bugger), 0);
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if (ret <= 0) {
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fprintf(stderr, "FAIL: pread failed - %s\n",
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strerror(errno));
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return(1);
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} else if (ret != strlen(bugger)) {
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fprintf(stderr, "FAIL: pread failed - read %i expected %i\n",
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ret, strlen(bugger));
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return(1);
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} else if (memcmp(bugger, in_buffer, strlen(bugger)) != 0) {
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fprintf(stderr, "FAIL: pread comparison mismatch: %s vs. %s\n",
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bugger, in_buffer);
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return(1);
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}
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gotsignal=0;
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if (pass==1) {
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while (!gotsignal) {
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(void)sigsuspend(&sigset);
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}
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pass++;
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goto nextpass;
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}
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printf("PASS\n");
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close(fd);
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return(0);
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}
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