Book a Demo!
CoCalc Logo Icon
StoreFeaturesDocsShareSupportNewsAboutPoliciesSign UpSign In
att
GitHub Repository: att/ast
 Path: blob/master/src/lib/libast/preroot/setpreroot.c
1810 views
1
/***********************************************************************

2
*                                                                      *

3
*               This software is part of the ast package               *

4
*          Copyright (c) 1985-2011 AT&T Intellectual Property          *

5
*                      and is licensed under the                       *

6
*                 Eclipse Public License, Version 1.0                  *

7
*                    by AT&T Intellectual Property                     *

8
*                                                                      *

9
*                A copy of the License is available at                 *

10
*          http://www.eclipse.org/org/documents/epl-v10.html           *

11
*         (with md5 checksum b35adb5213ca9657e911e9befb180842)         *

12
*                                                                      *

13
*              Information and Software Systems Research               *

14
*                            AT&T Research                             *

15
*                           Florham Park NJ                            *

16
*                                                                      *

17
*                 Glenn Fowler <[email protected]>                  *

18
*                  David Korn <[email protected]>                   *

19
*                   Phong Vo <[email protected]>                    *

20
*                                                                      *

21
***********************************************************************/

22
#pragma prototyped

23
/*

24
 * AT&T Bell Laboratories

25
 * force current command to run under dir preroot

26
 */

27


28
#include <ast.h>

29
#include <preroot.h>

30


31
#if FS_PREROOT

32


33
#include <option.h>

34


35
void

36
setpreroot(register char** argv, const char* dir)

37
{

38
	register char*	s;

39
	register char**	ap;

40
	int		argc;

41
	char*		cmd;

42
	char**		av;

43
	char		buf[PATH_MAX];

44


45
	if ((argv || (argv = opt_info.argv)) && (dir || (dir = getenv(PR_BASE)) && *dir) && !ispreroot(dir) && (*(cmd = *argv++) == '/' || (cmd = pathpath(cmd, NiL, PATH_ABSOLUTE|PATH_REGULAR|PATH_EXECUTE, buf, sizeof(buf)))))

46
	{

47
		argc = 3;

48
		for (ap = argv; *ap++; argc++);

49
		if (av = newof(0, char*, argc, 0))

50
		{

51
			ap = av;

52
			*ap++ = PR_COMMAND;

53
			*ap++ = (char*)dir;

54
			*ap++ = cmd;

55
			while (*ap++ = *argv++);

56
			if (!(s = getenv(PR_SILENT)) || !*s)

57
			{

58
				sfprintf(sfstderr, "+");

59
				ap = av;

60
				while (s = *ap++)

61
					sfprintf(sfstderr, " %s", s);

62
				sfprintf(sfstderr, "\n");

63
				sfsync(sfstderr);

64
			}

65
			execv(*av, av);

66
			free(av);

67
		}

68
	}

69
}

70


71
#else

72


73
NoN(setpreroot)

74


75
#endif

76


77