diff options
| -rw-r--r-- | id.c | 215 |
1 files changed, 111 insertions, 104 deletions
@@ -25,123 +25,130 @@ #include <string.h> const char *id_desc = "return user identity"; -const char *id_inv = "id [user]\nid -G [-n] [user]\nid -g [-nr] user\nid -u [-nr] [user]"; +const char *id_inv = + "id [user]\nid -G [-n] [user]\nid -g [-nr] user\nid -u [-nr] [user]"; #define FULL 0 #define NAMES 1 #define NUMS 2 -void id_printgids (char *user, int mode) +void id_printgids(char *user, int mode) { - struct group *gr = NULL; - struct group *current = NULL; - int num_groups = 0; - char sep = ' '; - int i = 0; + struct group *gr = NULL; + struct group *current = NULL; + int num_groups = 0; + char sep = ' '; + int i = 0; - setgrent(); - while ((current = getgrent()) != NULL) { - for (i = 0; current->gr_mem[i] != NULL; i++) { - if (!strcmp (user, current->gr_mem[i])) { - num_groups++; - gr = realloc (gr, num_groups * sizeof(struct group)); - gr[num_groups-1].gr_gid = current->gr_gid; - gr[num_groups-1].gr_name = strdup (current->gr_name); - } - } - } - endgrent(); + setgrent(); + while ((current = getgrent()) != NULL) { + for (i = 0; current->gr_mem[i] != NULL; i++) { + if (!strcmp(user, current->gr_mem[i])) { + num_groups++; + gr = realloc(gr, + num_groups * sizeof(struct group)); + gr[num_groups - 1].gr_gid = current->gr_gid; + gr[num_groups - 1].gr_name = + strdup(current->gr_name); + } + } + } + endgrent(); - if (mode == FULL && num_groups > 0) { - printf (" groups="); - sep = ','; - } + if (mode == FULL && num_groups > 0) { + printf(" groups="); + sep = ','; + } - while (i < num_groups) { - if (i > 0) - putchar (sep); - switch (mode) { - case NAMES: - printf ("%s", gr[i].gr_name); - break; - case NUMS: - printf ("%u", gr[i].gr_gid); - break; - default: - printf ("%u(%s)", gr[i].gr_gid, gr[i].gr_name); - break; - } - free (gr[i].gr_name); - i++; - } - free (gr); + while (i < num_groups) { + if (i > 0) + putchar(sep); + switch (mode) { + case NAMES: + printf("%s", gr[i].gr_name); + break; + case NUMS: + printf("%u", gr[i].gr_gid); + break; + default: + printf("%u(%s)", gr[i].gr_gid, gr[i].gr_name); + break; + } + free(gr[i].gr_name); + i++; + } + free(gr); } -int -main (int argc, char **argv) +int main(int argc, char **argv) { - int n = 0, r = 0; - char mode = 0; - int c; - struct passwd pw; - struct group gr; + int n = 0, r = 0; + char mode = 0; + int c; + struct passwd pw; + struct group gr; - while ((c = getopt (argc, argv, ":Ggunr")) != -1) { - switch (c) { - case 'G': - case 'g': - case 'u': - if (mode) - return 1; - mode = c; - break; - case 'n': - n = 1; - break; - case 'r': - r = 1; - break; - default: - return 1; - } - } + while ((c = getopt(argc, argv, ":Ggunr")) != -1) { + switch (c) { + case 'G': + case 'g': + case 'u': + if (mode) + return 1; + mode = c; + break; + case 'n': + n = 1; + break; + case 'r': + r = 1; + break; + default: + return 1; + } + } - if ((mode == 0 && (n == 1 || r == 1)) || (mode == 'G' && r == 1)) - return 1; - - if (optind >= argc) - pw = *getpwuid (mode == 'u' && r == 0 ? geteuid() : getuid()); - else if (optind == argc -1) - pw = *getpwnam (argv[optind]); - else - return 1; + if ((mode == 0 && (n == 1 || r == 1)) || (mode == 'G' && r == 1)) + return 1; - switch (mode) { - case 'G': - id_printgids (pw.pw_name, n ? NAMES : NUMS); - break; - case 'g': - gr = *getgrgid (r ? getgid() : getegid()); - if (n) printf ("%s", gr.gr_name); - else printf ("%u", gr.gr_gid); - break; - case 'u': - if (n) printf ("%s", pw.pw_name); - else printf ("%u", pw.pw_uid); - break; - default: - gr = *getgrgid (pw.pw_uid == getuid() ? getgid() : pw.pw_gid); - printf ("uid=%u(%s) gid=%u(%s)", pw.pw_uid, pw.pw_name, gr.gr_gid, gr.gr_name); - if (pw.pw_uid != geteuid()) { - pw = *getpwuid (geteuid()); - printf (" euid=%u(%s)", pw.pw_uid, pw.pw_name); - } - if (gr.gr_gid != getegid()) { - gr = *getgrgid (getegid()); - printf (" egid=%u(%s)", gr.gr_gid, gr.gr_name); - } - id_printgids (pw.pw_name, FULL); - } - printf ("\n"); - return 0; + if (optind >= argc) + pw = *getpwuid(mode == 'u' && r == 0 ? geteuid() : getuid()); + else if (optind == argc - 1) + pw = *getpwnam(argv[optind]); + else + return 1; + + switch (mode) { + case 'G': + id_printgids(pw.pw_name, n ? NAMES : NUMS); + break; + case 'g': + gr = *getgrgid(r ? getgid() : getegid()); + if (n) + printf("%s", gr.gr_name); + else + printf("%u", gr.gr_gid); + break; + case 'u': + if (n) + printf("%s", pw.pw_name); + else + printf("%u", pw.pw_uid); + break; + default: + gr = *getgrgid(pw.pw_uid == getuid()? getgid() : pw.pw_gid); + printf("uid=%u(%s) gid=%u(%s)", pw.pw_uid, pw.pw_name, + gr.gr_gid, gr.gr_name); + if (pw.pw_uid != geteuid()) { + pw = *getpwuid(geteuid()); + printf(" euid=%u(%s)", pw.pw_uid, pw.pw_name); + } + if (gr.gr_gid != getegid()) { + gr = *getgrgid(getegid()); + printf(" egid=%u(%s)", gr.gr_gid, gr.gr_name); + } + id_printgids(pw.pw_name, FULL); + } + printf("\n"); + return 0; } |