Attachment 599753 Details for Bug 842280 – reproducer

reproducer

reproducer.c (text/plain), 2.53 KB, created by Michal Hlavinka on 2012-07-23 10:51:40 UTC

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Creator: Michal Hlavinka

Created: 2012-07-23 10:51:40 UTC

Size: 2.53 KB

patch

obsolete

>#include <stdio.h>
>#include <unistd.h>
>#include <sys/types.h>
>#include <sys/stat.h>
>#include <sys/wait.h>
>#include <spawn.h>
>#include <signal.h>
>#include <fcntl.h>
>#include <string.h>
>/* if it uses fork() why bother? */
>#undef fork
>#define NOTE(a) fprintf(stderr,"%s\n",a)
>pid_t fork (void) { NOTE("uses fork()"); return -1; }
>pid_t _fork (void) { NOTE("uses _fork()"); return -1; }
>pid_t __fork (void) { NOTE("uses __fork()"); return -1; }
>int
>main(argc, argv)
>int	argc;
>char**	argv;
>{
>	char*			s;
>	pid_t			pid;
>	posix_spawnattr_t	attr;
>	int			n;
>	int			status;
>	char*			cmd[3];
>	char			tmp[1024];
>	if (argv[1])
>		_exit(signal(SIGHUP, SIG_DFL) != SIG_IGN);
>	signal(SIGHUP, SIG_IGN);
>	if (posix_spawnattr_init(&attr))
>	{
>		NOTE("posix_spawnattr_init() FAILED");
>		_exit(0);
>	}
>	if (posix_spawnattr_setpgroup(&attr, 0))
>	{
>		NOTE("posix_spawnattr_setpgroup() FAILED");
>		_exit(0);
>	}
>	if (posix_spawnattr_setflags(&attr, POSIX_SPAWN_SETPGROUP))
>	{
>		NOTE("posix_spawnattr_setflags() FAILED");
>		_exit(0);
>	}
>	/* first try an a.out and verify that SIGHUP is ignored */
>	cmd[0] = argv[0];
>	cmd[1] = "test";
>	cmd[2] = 0;
>	if (posix_spawn(&pid, cmd[0], 0, &attr, cmd, 0))
>	{
>		NOTE("posix_spawn() FAILED");
>		_exit(0);
>	}
>	status = 1;
>	if (wait(&status) < 0)
>	{
>		NOTE("wait() FAILED");
>		_exit(0);
>	}
>	if (status != 0)
>	{
>		NOTE("SIGHUP ignored in parent not ignored in child");
>		_exit(0);
>	}
>	/* must return exec-type errors or its useless to us *unless* there is no [v]fork() */
>	n = strlen(cmd[0]);
>	if (n >= (sizeof(tmp) - 3))
>	{
>		NOTE("test executable path too long");
>		_exit(0);
>	}
>	strcpy(tmp, cmd[0]);
>	tmp[n] = '.';
>	tmp[n+1] = 's';
>	tmp[n+2] = 'h';
>	tmp[n+3] = 0;
>	if ((n = open(tmp, O_CREAT|O_WRONLY, S_IRWXU|S_IRWXG|S_IRWXO)) < 0 ||
>	    chmod(tmp, S_IRWXU|S_IRWXG|S_IRWXO) < 0 ||
>	    write(n, "exit 99\n", 8) != 8 ||
>	    close(n) < 0)
>	{
>		NOTE("test script create FAILED");
>		_exit(0);
>	}
>	cmd[0] = tmp;
>	n = 0; /* 0 means reject */
>	pid = -1;
>	if (posix_spawn(&pid, cmd[0], 0, &attr, cmd, 0))
>		n = 2; /* ENOEXEC produces posix_spawn() error => BEST */
>	else if (pid == -1)
>		NOTE("ENOEXEC returns pid == -1");
>	else if (wait(&status) != pid)
>		NOTE("ENOEXEC produces no child process");
>	else if (!WIFEXITED(status))
>		NOTE("ENOEXEC produces signal exit");
>	else
>	{
>		status = WEXITSTATUS(status);
>		if (status == 127)
>		{
>			NOTE("ENOEXEC produces exist status 127 => GOOD");
>			n = 1; /* ENOEXEC produces exit status 127 => GOOD */
>		}
>		else if (status == 99)
>			NOTE("ENOEXEC invokes sh");
>		else if (status == 0)
>			NOTE("ENOEXEC reports no error");
>	}
>	_exit(n);
>}
>

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Attachments on bug 842280: 599753 | 602562