1 /***********************************************************************
2 * *
3 * This software is part of the ast package *
4 * Copyright (c) 1982-2012 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 * David Korn <dgk@research.att.com> *
18 * *
19 ***********************************************************************/
20 #pragma prototyped
21 /*
22 * umask [-S] [mask]
23 *
24 * David Korn
25 * AT&T Labs
26 * research!dgk
27 *
28 */
29
30 #include <ast.h>
31 #include <sfio.h>
32 #include <error.h>
33 #include <ctype.h>
34 #include <ls.h>
35 #include <shell.h>
36 #include "builtins.h"
37 #ifndef SH_DICT
38 # define SH_DICT "libshell"
39 #endif
40
b_umask(int argc,char * argv[],Shbltin_t * context)41 int b_umask(int argc,char *argv[],Shbltin_t *context)
42 {
43 register char *mask;
44 register int flag = 0, sflag = 0;
45 NOT_USED(context);
46 while((argc = optget(argv,sh_optumask))) switch(argc)
47 {
48 case 'S':
49 sflag++;
50 break;
51 case ':':
52 errormsg(SH_DICT,2, "%s", opt_info.arg);
53 break;
54 case '?':
55 errormsg(SH_DICT,ERROR_usage(2), "%s",opt_info.arg);
56 break;
57 }
58 if(error_info.errors)
59 errormsg(SH_DICT,ERROR_usage(2),"%s",optusage((char*)0));
60 argv += opt_info.index;
61 if(mask = *argv)
62 {
63 register int c;
64 if(isdigit(*mask))
65 {
66 while(c = *mask++)
67 {
68 if (c>='0' && c<='7')
69 flag = (flag<<3) + (c-'0');
70 else
71 errormsg(SH_DICT,ERROR_exit(1),e_number,*argv);
72 }
73 }
74 else
75 {
76 char *cp = mask;
77 flag = umask(0);
78 c = strperm(cp,&cp,~flag&0777);
79 if(*cp)
80 {
81 umask(flag);
82 errormsg(SH_DICT,ERROR_exit(1),e_format,mask);
83 }
84 flag = (~c&0777);
85 }
86 umask(flag);
87 }
88 else
89 {
90 umask(flag=umask(0));
91 if(sflag)
92 sfprintf(sfstdout,"%s\n",fmtperm(~flag&0777));
93 else
94 sfprintf(sfstdout,"%0#4o\n",flag);
95 }
96 return(0);
97 }
98
99