diff options
Diffstat (limited to 'toys/posix/id.c')
| -rw-r--r-- | toys/posix/id.c | 156 |
1 files changed, 76 insertions, 80 deletions
diff --git a/toys/posix/id.c b/toys/posix/id.c index 523d4f3a..0cdd2b0c 100644 --- a/toys/posix/id.c +++ b/toys/posix/id.c @@ -1,6 +1,4 @@ -/* vi: set sw=4 ts=4: - * - * id.c - print real and effective user and group IDs +/* id.c - print real and effective user and group IDs * * Copyright 2012 Sony Network Entertainment, Inc. * @@ -11,18 +9,18 @@ USE_ID(NEWTOY(id, "nGgru", TOYFLAG_BIN)) config ID - bool "id" - default y - help - usage: id [-nGgru] - - Print user and group ID. - - -n print names instead of numeric IDs (to be used with -Ggu) - -G Show only the group IDs - -g Show only the effective group ID - -r Show real ID instead of effective ID - -u Show only the effective user ID + bool "id" + default y + help + usage: id [-nGgru] + + Print user and group ID. + + -n print names instead of numeric IDs (to be used with -Ggu) + -G Show only the group IDs + -g Show only the effective group ID + -r Show real ID instead of effective ID + -u Show only the effective user ID */ #define FOR_id @@ -30,85 +28,83 @@ config ID static void s_or_u(char *s, unsigned u, int done) { - if (toys.optflags & FLAG_n) printf("%s", s); - else printf("%u", u); - if (done) { - xputc('\n'); - exit(0); - } + if (toys.optflags & FLAG_n) printf("%s", s); + else printf("%u", u); + if (done) { + xputc('\n'); + exit(0); + } } static void showid(char *header, unsigned u, char *s) { - printf("%s%u(%s)", header, u, s); + printf("%s%u(%s)", header, u, s); } struct passwd *xgetpwuid(uid_t uid) { - struct passwd *pwd = getpwuid(uid); - if (!pwd) error_exit(NULL); - return pwd; + struct passwd *pwd = getpwuid(uid); + if (!pwd) error_exit(NULL); + return pwd; } struct group *xgetgrgid(gid_t gid) { - struct group *group = getgrgid(gid); - if (!group) error_exit(NULL); - return group; + struct group *group = getgrgid(gid); + if (!group) error_exit(NULL); + return group; } void id_main(void) { - int flags = toys.optflags, i, ngroups; - struct passwd *pw; - struct group *grp; - uid_t uid = getuid(), euid = geteuid(); - gid_t gid = getgid(), egid = getegid(), *groups; - - /* check if a username is given */ - if (*toys.optargs) { - if (!(pw = getpwnam(*toys.optargs))) - error_exit("no such user '%s'", *toys.optargs); - uid = euid = pw->pw_uid; - gid = egid = pw->pw_gid; - } - - i = toys.optflags & FLAG_r; - pw = xgetpwuid(i ? uid : euid); - if (flags & FLAG_u) s_or_u(pw->pw_name, pw->pw_uid, 1); - - grp = xgetgrgid(i ? gid : egid); - if (flags & FLAG_g) s_or_u(grp->gr_name, grp->gr_gid, 1); - - if (!(flags & FLAG_G)) { - showid("uid=", pw->pw_uid, pw->pw_name); - showid(" gid=", grp->gr_gid, grp->gr_name); - - if (!i) { - if (uid != euid) { - pw = xgetpwuid(euid); - showid(" euid=", pw->pw_uid, pw->pw_name); - } - if (gid != egid) { - grp = xgetgrgid(egid); - showid(" egid=", grp->gr_gid, grp->gr_name); - } - } - - showid(" groups=", grp->gr_gid, grp->gr_name); - } - - - groups = (gid_t *)toybuf; - if (0 >= (ngroups = getgroups(sizeof(toybuf)/sizeof(gid_t), groups))) - perror_exit(0); - - for (i = 0; i < ngroups; i++) { - xputc(' '); - if (!(grp = getgrgid(groups[i]))) perror_msg(0); - else if (flags & FLAG_G) - s_or_u(grp->gr_name, grp->gr_gid, 0); - else if (grp->gr_gid != egid) showid("", grp->gr_gid, grp->gr_name); - } - xputc('\n'); + int flags = toys.optflags, i, ngroups; + struct passwd *pw; + struct group *grp; + uid_t uid = getuid(), euid = geteuid(); + gid_t gid = getgid(), egid = getegid(), *groups; + + // check if a username is given + if (*toys.optargs) { + if (!(pw = getpwnam(*toys.optargs))) + error_exit("no such user '%s'", *toys.optargs); + uid = euid = pw->pw_uid; + gid = egid = pw->pw_gid; + } + + i = toys.optflags & FLAG_r; + pw = xgetpwuid(i ? uid : euid); + if (flags & FLAG_u) s_or_u(pw->pw_name, pw->pw_uid, 1); + + grp = xgetgrgid(i ? gid : egid); + if (flags & FLAG_g) s_or_u(grp->gr_name, grp->gr_gid, 1); + + if (!(flags & FLAG_G)) { + showid("uid=", pw->pw_uid, pw->pw_name); + showid(" gid=", grp->gr_gid, grp->gr_name); + + if (!i) { + if (uid != euid) { + pw = xgetpwuid(euid); + showid(" euid=", pw->pw_uid, pw->pw_name); + } + if (gid != egid) { + grp = xgetgrgid(egid); + showid(" egid=", grp->gr_gid, grp->gr_name); + } + } + + showid(" groups=", grp->gr_gid, grp->gr_name); + } + + groups = (gid_t *)toybuf; + if (0 >= (ngroups = getgroups(sizeof(toybuf)/sizeof(gid_t), groups))) + perror_exit(0); + + for (i = 0; i < ngroups; i++) { + xputc(' '); + if (!(grp = getgrgid(groups[i]))) perror_msg(0); + else if (flags & FLAG_G) s_or_u(grp->gr_name, grp->gr_gid, 0); + else if (grp->gr_gid != egid) showid("", grp->gr_gid, grp->gr_name); + } + xputc('\n'); } |