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comparison toys/posix/id.c @ 1503:96bdf979d9e6 draft

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Untangle id/groups/logname so single.sh can build each one standalone.
author Rob Landley <rob@landley.net>
date Sat, 27 Sep 2014 20:28:33 -0500
parents 855728acd1ad
children 4bfbd8b96f66
comparison
equal deleted inserted replaced
1502:84922376d15c 1503:96bdf979d9e6
5 * by Tim Bird <tim.bird@am.sony.com> 5 * by Tim Bird <tim.bird@am.sony.com>
6 * 6 *
7 * See http://opengroup.org/onlinepubs/9699919799/utilities/id.html 7 * See http://opengroup.org/onlinepubs/9699919799/utilities/id.html
8 8
9 USE_ID(NEWTOY(id, ">1nGgru[!Ggu]", TOYFLAG_BIN)) 9 USE_ID(NEWTOY(id, ">1nGgru[!Ggu]", TOYFLAG_BIN))
10 USE_ID_GROUPS(OLDTOY(groups, id, NULL, TOYFLAG_USR|TOYFLAG_BIN)) 10 USE_GROUPS(OLDTOY(groups, id, NULL, TOYFLAG_USR|TOYFLAG_BIN))
11 USE_ID_LOGNAME(OLDTOY(logname, id, ">0", TOYFLAG_BIN)) 11 USE_LOGNAME(OLDTOY(logname, id, ">0", TOYFLAG_BIN))
12 USE_ID_LOGNAME(OLDTOY(whoami, id, ">0", TOYFLAG_BIN)) 12 USE_LOGNAME(OLDTOY(whoami, id, ">0", TOYFLAG_BIN))
13 13
14 config ID 14 config ID
15 bool "id" 15 bool "id"
16 default y 16 default y
17 help 17 help
23 -G Show only the group IDs 23 -G Show only the group IDs
24 -g Show only the effective group ID 24 -g Show only the effective group ID
25 -r Show real ID instead of effective ID 25 -r Show real ID instead of effective ID
26 -u Show only the effective user ID 26 -u Show only the effective user ID
27 27
28 config ID_GROUPS 28 config GROUPS
29 bool "groups" 29 bool "groups"
30 default y 30 default y
31 depends on ID
32 help 31 help
33 usage: groups [user] 32 usage: groups [user]
34 33
35 Print the groups a user is in. 34 Print the groups a user is in.
36 35
37 config ID_LOGNAME 36 config LOGNAME
38 bool "logname" 37 bool "logname"
39 default y 38 default y
40 depends on ID
41 help 39 help
42 usage: logname 40 usage: logname
43 41
44 Print the current user name. 42 Print the current user name.
45 43
44 config WHOAMI
45 bool "whoami"
46 default y
47 help
48 usage: whoami
49
50 Print the current user name.
46 */ 51 */
47 52
48 #define FOR_id 53 #define FOR_id
49 #include "toys.h" 54 #include "toys.h"
50 55
56 GLOBALS(
57 int do_u, do_n, do_G, is_groups;
58 )
59
51 static void s_or_u(char *s, unsigned u, int done) 60 static void s_or_u(char *s, unsigned u, int done)
52 { 61 {
53 if (toys.optflags & FLAG_n) printf("%s", s); 62 if (TT.do_n) printf("%s", s);
54 else printf("%u", u); 63 else printf("%u", u);
55 if (done) { 64 if (done) {
56 xputc('\n'); 65 xputc('\n');
57 exit(0); 66 exit(0);
58 } 67 }
63 printf("%s%u(%s)", header, u, s); 72 printf("%s%u(%s)", header, u, s);
64 } 73 }
65 74
66 void do_id(char *username) 75 void do_id(char *username)
67 { 76 {
68 int flags, i, ngroups, cmd_groups = toys.which->name[0] == 'g'; 77 int flags, i, ngroups;
69 struct passwd *pw; 78 struct passwd *pw;
70 struct group *grp; 79 struct group *grp;
71 uid_t uid = getuid(), euid = geteuid(); 80 uid_t uid = getuid(), euid = geteuid();
72 gid_t gid = getgid(), egid = getegid(), *groups; 81 gid_t gid = getgid(), egid = getegid(), *groups;
73
74 if (cmd_groups)
75 toys.optflags |= FLAG_G | FLAG_n;
76 82
77 flags = toys.optflags; 83 flags = toys.optflags;
78 84
79 // check if a username is given 85 // check if a username is given
80 if (username) { 86 if (username) {
81 pw = xgetpwnam(username); 87 pw = xgetpwnam(username);
82 uid = euid = pw->pw_uid; 88 uid = euid = pw->pw_uid;
83 gid = egid = pw->pw_gid; 89 gid = egid = pw->pw_gid;
84 if (cmd_groups) printf("%s : ", pw->pw_name); 90 if (TT.is_groups) printf("%s : ", pw->pw_name);
85 } 91 }
86 92
87 i = flags & FLAG_r; 93 i = flags & FLAG_r;
88 pw = xgetpwuid(i ? uid : euid); 94 pw = xgetpwuid(i ? uid : euid);
89 if (flags & FLAG_u) s_or_u(pw->pw_name, pw->pw_uid, 1); 95 if (TT.do_u) s_or_u(pw->pw_name, pw->pw_uid, 1);
90 96
91 grp = xgetgrgid(i ? gid : egid); 97 grp = xgetgrgid(i ? gid : egid);
92 if (flags & FLAG_g) s_or_u(grp->gr_name, grp->gr_gid, 1); 98 if (flags & FLAG_g) s_or_u(grp->gr_name, grp->gr_gid, 1);
93 99
94 if (!(flags & FLAG_G)) { 100 if (!TT.do_G) {
95 showid("uid=", pw->pw_uid, pw->pw_name); 101 showid("uid=", pw->pw_uid, pw->pw_name);
96 showid(" gid=", grp->gr_gid, grp->gr_name); 102 showid(" gid=", grp->gr_gid, grp->gr_name);
97 103
98 if (!i) { 104 if (!i) {
99 if (uid != euid) { 105 if (uid != euid) {
114 ngroups = username ? getgrouplist(username, gid, groups, &i) 120 ngroups = username ? getgrouplist(username, gid, groups, &i)
115 : getgroups(i, groups); 121 : getgroups(i, groups);
116 if (ngroups<0) perror_exit(0); 122 if (ngroups<0) perror_exit(0);
117 123
118 for (i = 0; i<ngroups; i++) { 124 for (i = 0; i<ngroups; i++) {
119 if (i) xputc(' '); 125 if (i || !TT.do_G) xputc(' ');
120 if (!(grp = getgrgid(groups[i]))) perror_msg(0); 126 if (!(grp = getgrgid(groups[i]))) perror_msg(0);
121 else if (flags & FLAG_G) s_or_u(grp->gr_name, grp->gr_gid, 0); 127 else if (TT.do_G) s_or_u(grp->gr_name, grp->gr_gid, 0);
122 else if (grp->gr_gid != egid) showid("", grp->gr_gid, grp->gr_name); 128 else if (grp->gr_gid != egid) showid("", grp->gr_gid, grp->gr_name);
123 } 129 }
124 xputc('\n'); 130 xputc('\n');
125 } 131 }
126 132
127 void id_main(void) 133 void id_main(void)
128 { 134 {
129 if (toys.which->name[0] > 'i') toys.optflags = (FLAG_u | FLAG_n); 135 // FLAG macros can be 0 if "id" command enabled, so snapshot them here.
136 if (FLAG_u) TT.do_u = toys.optflags & FLAG_u;
137 if (FLAG_n) TT.do_n = toys.optflags & FLAG_n;
138 if (FLAG_G) TT.do_G = toys.optflags & FLAG_G;
139
140 // And set the variables for non-id commands.
141 TT.is_groups = toys.which->name[0] == 'g';
142 if (TT.is_groups) TT.do_G = TT.do_n = 1;
143 else if (toys.which->name[0] != 'i') TT.do_u = TT.do_n = 1;
144
130 if (toys.optc) while(*toys.optargs) do_id(*toys.optargs++); 145 if (toys.optc) while(*toys.optargs) do_id(*toys.optargs++);
131 else do_id(NULL); 146 else do_id(NULL);
132 } 147 }