1 /*********************************************************************** 2 * * 3 * This software is part of the ast package * 4 * Copyright (c) 1985-2009 AT&T Intellectual Property * 5 * and is licensed under the * 6 * Common Public License, Version 1.0 * 7 * by AT&T Intellectual Property * 8 * * 9 * A copy of the License is available at * 10 * http://www.opensource.org/licenses/cpl1.0.txt * 11 * (with md5 checksum 059e8cd6165cb4c31e351f2b69388fd9) * 12 * * 13 * Information and Software Systems Research * 14 * AT&T Research * 15 * Florham Park NJ * 16 * * 17 * Glenn Fowler <gsf@research.att.com> * 18 * David Korn <dgk@research.att.com> * 19 * Phong Vo <kpv@research.att.com> * 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(buf, cmd, NiL, PATH_ABSOLUTE|PATH_REGULAR|PATH_EXECUTE)))) 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++ = 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