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annotate toys/posix/id.c @ 694:786841fdb1e0

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Reindent to two spaces per level. Remove vi: directives that haven't worked right in years (ubuntu broke its' vim implementation). Remove trailing spaces. Add/remove blank lines. Re-wordwrap in places. Update documentation with new coding style. The actual code should be the same afterward, this is just cosmetic refactoring.
author Rob Landley <rob@landley.net>
date Tue, 13 Nov 2012 17:14:08 -0600
parents 7e846e281e38
children 50052f1368b9
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
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1 /* id.c - print real and effective user and group IDs
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2 *
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3 * Copyright 2012 Sony Network Entertainment, Inc.
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4 *
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5 * by Tim Bird <tim.bird@am.sony.com>
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6 *
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7 * See http://opengroup.org/onlinepubs/9699919799/utilities/id.html
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8
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9 USE_ID(NEWTOY(id, "nGgru", TOYFLAG_BIN))
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10
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11 config ID
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12 bool "id"
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13 default y
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14 help
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15 usage: id [-nGgru]
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16
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17 Print user and group ID.
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18
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19 -n print names instead of numeric IDs (to be used with -Ggu)
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20 -G Show only the group IDs
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21 -g Show only the effective group ID
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22 -r Show real ID instead of effective ID
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23 -u Show only the effective user ID
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24 */
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25
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26 #define FOR_id
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27 #include "toys.h"
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28
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29 static void s_or_u(char *s, unsigned u, int done)
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30 {
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31 if (toys.optflags & FLAG_n) printf("%s", s);
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32 else printf("%u", u);
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33 if (done) {
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34 xputc('\n');
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35 exit(0);
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36 }
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37 }
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38
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39 static void showid(char *header, unsigned u, char *s)
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40 {
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41 printf("%s%u(%s)", header, u, s);
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42 }
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44 struct passwd *xgetpwuid(uid_t uid)
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45 {
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46 struct passwd *pwd = getpwuid(uid);
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47 if (!pwd) error_exit(NULL);
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48 return pwd;
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49 }
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51 struct group *xgetgrgid(gid_t gid)
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52 {
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53 struct group *group = getgrgid(gid);
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54 if (!group) error_exit(NULL);
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55 return group;
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56 }
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57
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58 void id_main(void)
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59 {
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60 int flags = toys.optflags, i, ngroups;
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61 struct passwd *pw;
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62 struct group *grp;
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63 uid_t uid = getuid(), euid = geteuid();
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64 gid_t gid = getgid(), egid = getegid(), *groups;
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66 // check if a username is given
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67 if (*toys.optargs) {
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68 if (!(pw = getpwnam(*toys.optargs)))
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69 error_exit("no such user '%s'", *toys.optargs);
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70 uid = euid = pw->pw_uid;
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71 gid = egid = pw->pw_gid;
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72 }
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73
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74 i = toys.optflags & FLAG_r;
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75 pw = xgetpwuid(i ? uid : euid);
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76 if (flags & FLAG_u) s_or_u(pw->pw_name, pw->pw_uid, 1);
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78 grp = xgetgrgid(i ? gid : egid);
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79 if (flags & FLAG_g) s_or_u(grp->gr_name, grp->gr_gid, 1);
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81 if (!(flags & FLAG_G)) {
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82 showid("uid=", pw->pw_uid, pw->pw_name);
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83 showid(" gid=", grp->gr_gid, grp->gr_name);
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84
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85 if (!i) {
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86 if (uid != euid) {
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87 pw = xgetpwuid(euid);
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88 showid(" euid=", pw->pw_uid, pw->pw_name);
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89 }
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90 if (gid != egid) {
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91 grp = xgetgrgid(egid);
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92 showid(" egid=", grp->gr_gid, grp->gr_name);
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93 }
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94 }
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parents: 542
diff changeset
95
694
786841fdb1e0 Reindent to two spaces per level. Remove vi: directives that haven't worked right in years (ubuntu broke its' vim implementation). Remove trailing spaces. Add/remove blank lines. Re-wordwrap in places. Update documentation with new coding style.
Rob Landley <rob@landley.net>
parents: 674
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96 showid(" groups=", grp->gr_gid, grp->gr_name);
786841fdb1e0 Reindent to two spaces per level. Remove vi: directives that haven't worked right in years (ubuntu broke its' vim implementation). Remove trailing spaces. Add/remove blank lines. Re-wordwrap in places. Update documentation with new coding style.
Rob Landley <rob@landley.net>
parents: 674
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97 }
543
60b97ba66a70 Extensive semi-gratuitous refactoring: factor out common code, handle euid!=uid and egid!=gid cases. (Note: test suite requires root access, possibly container support.)
Rob Landley <rob@landley.net>
parents: 542
diff changeset
98
694
786841fdb1e0 Reindent to two spaces per level. Remove vi: directives that haven't worked right in years (ubuntu broke its' vim implementation). Remove trailing spaces. Add/remove blank lines. Re-wordwrap in places. Update documentation with new coding style.
Rob Landley <rob@landley.net>
parents: 674
diff changeset
99 groups = (gid_t *)toybuf;
786841fdb1e0 Reindent to two spaces per level. Remove vi: directives that haven't worked right in years (ubuntu broke its' vim implementation). Remove trailing spaces. Add/remove blank lines. Re-wordwrap in places. Update documentation with new coding style.
Rob Landley <rob@landley.net>
parents: 674
diff changeset
100 if (0 >= (ngroups = getgroups(sizeof(toybuf)/sizeof(gid_t), groups)))
786841fdb1e0 Reindent to two spaces per level. Remove vi: directives that haven't worked right in years (ubuntu broke its' vim implementation). Remove trailing spaces. Add/remove blank lines. Re-wordwrap in places. Update documentation with new coding style.
Rob Landley <rob@landley.net>
parents: 674
diff changeset
101 perror_exit(0);
493
42a322adbd17 update id to be SUS compliant
Daniel Walter <d.walter@0x90.at>
parents: 430
diff changeset
102
694
786841fdb1e0 Reindent to two spaces per level. Remove vi: directives that haven't worked right in years (ubuntu broke its' vim implementation). Remove trailing spaces. Add/remove blank lines. Re-wordwrap in places. Update documentation with new coding style.
Rob Landley <rob@landley.net>
parents: 674
diff changeset
103 for (i = 0; i < ngroups; i++) {
786841fdb1e0 Reindent to two spaces per level. Remove vi: directives that haven't worked right in years (ubuntu broke its' vim implementation). Remove trailing spaces. Add/remove blank lines. Re-wordwrap in places. Update documentation with new coding style.
Rob Landley <rob@landley.net>
parents: 674
diff changeset
104 xputc(' ');
786841fdb1e0 Reindent to two spaces per level. Remove vi: directives that haven't worked right in years (ubuntu broke its' vim implementation). Remove trailing spaces. Add/remove blank lines. Re-wordwrap in places. Update documentation with new coding style.
Rob Landley <rob@landley.net>
parents: 674
diff changeset
105 if (!(grp = getgrgid(groups[i]))) perror_msg(0);
786841fdb1e0 Reindent to two spaces per level. Remove vi: directives that haven't worked right in years (ubuntu broke its' vim implementation). Remove trailing spaces. Add/remove blank lines. Re-wordwrap in places. Update documentation with new coding style.
Rob Landley <rob@landley.net>
parents: 674
diff changeset
106 else if (flags & FLAG_G) s_or_u(grp->gr_name, grp->gr_gid, 0);
786841fdb1e0 Reindent to two spaces per level. Remove vi: directives that haven't worked right in years (ubuntu broke its' vim implementation). Remove trailing spaces. Add/remove blank lines. Re-wordwrap in places. Update documentation with new coding style.
Rob Landley <rob@landley.net>
parents: 674
diff changeset
107 else if (grp->gr_gid != egid) showid("", grp->gr_gid, grp->gr_name);
786841fdb1e0 Reindent to two spaces per level. Remove vi: directives that haven't worked right in years (ubuntu broke its' vim implementation). Remove trailing spaces. Add/remove blank lines. Re-wordwrap in places. Update documentation with new coding style.
Rob Landley <rob@landley.net>
parents: 674
diff changeset
108 }
786841fdb1e0 Reindent to two spaces per level. Remove vi: directives that haven't worked right in years (ubuntu broke its' vim implementation). Remove trailing spaces. Add/remove blank lines. Re-wordwrap in places. Update documentation with new coding style.
Rob Landley <rob@landley.net>
parents: 674
diff changeset
109 xputc('\n');
413
12add511705e Add id command from Tim Bird.
Rob Landley <rob@landley.net>
parents:
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110 }