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Diffstat (limited to 'toys/id.c')
-rw-r--r--toys/id.c113
1 files changed, 33 insertions, 80 deletions
diff --git a/toys/id.c b/toys/id.c
index aaea3e37..7436a75a 100644
--- a/toys/id.c
+++ b/toys/id.c
@@ -36,42 +36,30 @@ config ID
void pretty_print(struct passwd *pw, struct group *grp, struct group **grps,
int n)
{
- int i;
- printf("uid= %d(%s) gid= %d(%s)", pw->pw_uid, pw->pw_name,
- grp->gr_gid, grp->gr_name);
- if (n) {
- printf(" groups= ");
- }
- for (i = 0; i < n; i++) {
- printf("%d(%s)%s", grps[i]->gr_gid, grps[i]->gr_name,
- (i < n-1) ? ",": "");
+ int i = 0;
+
+ printf("uid=%u(%s) gid=%u(%s)", pw->pw_uid, pw->pw_name,
+ grp->gr_gid, grp->gr_name);
+ if (n) printf(" groups=");
+ while (i < n) {
+ printf("%d(%s)", grps[i]->gr_gid, grps[i]->gr_name);
+ if (++i<n) xputc(',');
}
- printf("\n");
+ xputc('\n');
}
void id_main(void)
{
- int flags = toys.optflags;
-
+ int flags = toys.optflags, i, ngroups;
struct passwd *pw;
- struct group *grp;
- struct group **grps;
+ struct group *grp, **grps;
uid_t uid;
- gid_t gid;
- gid_t *groups;
- int i;
- int ngroups;
- char *username;
+ gid_t gid, *groups;
/* check if a username is given */
if (*toys.optargs) {
- username = *(toys.optargs);
- pw = getpwnam(username);
- if (!pw) {
- printf("id: %s: no such user\n", username);
- toys.exitval = 1;
- return;
- }
+ if (!(pw = getpwnam(*toys.optargs)))
+ error_exit("no such user '%s'", *toys.optargs);
uid = pw->pw_uid;
gid = pw->pw_gid;
} else {
@@ -85,78 +73,43 @@ void id_main(void)
}
}
- pw = getpwuid(uid);
- if (!pw) {
- perror("id");
- toys.exitval = 1;
- return;
- }
-
- grp = getgrgid(pw->pw_gid);
- if (!grp) {
- perror("id");
- toys.exitval = 1;
- return;
- }
+ if (!(pw = getpwuid(uid)) || !(grp = getgrgid(gid)))
+ perror_exit(0);
if (flags & FLAG_u) {
- if (flags & FLAG_n)
- printf("%s\n", pw->pw_name);
- else
- printf("%d\n", pw->pw_uid);
+ if (flags & FLAG_n) xputs(pw->pw_name);
+ else printf("%d\n", pw->pw_uid);
return;
}
if (flags & FLAG_g) {
- if (flags & FLAG_n)
- printf("%s\n", grp->gr_name);
- else
- printf("%d\n", grp->gr_gid);
+ if (flags & FLAG_n) xputs(grp->gr_name);
+ else printf("%d\n", grp->gr_gid);
return;
}
-
- if (flags & FLAG_r) {
- printf("-r can only be used in combination with -u or -g\n");
- toys.exitval = 1;
- return;
- }
ngroups = sysconf(_SC_NGROUPS_MAX);
- /* fallback for number of groups to 32 */
- if (ngroups < 0)
- ngroups = 32;
- groups = malloc(ngroups * sizeof(gid_t));
- if (!groups) {
- perror("id");
- toys.exitval = 1;
- return;
- }
- if (getgrouplist(pw->pw_name, pw->pw_gid, groups, &ngroups) < 0) {
- perror("id");
- toys.exitval = 1;
- return;
- }
- grps = malloc(ngroups * sizeof(struct group *));
+ if (ngroups<1) ngroups = 32;
+ groups = xmalloc(ngroups * sizeof(gid_t));
+ if (getgrouplist(pw->pw_name, pw->pw_gid, groups, &ngroups) < 0)
+ perror_exit(0);
+
+ grps = xmalloc(ngroups * sizeof(struct group *));
for (i = 0; i < ngroups; i++) {
struct group *tmp;
- grps[i] = malloc(sizeof(struct group));
+ grps[i] = xmalloc(sizeof(struct group));
size_t f = sysconf(_SC_GETGR_R_SIZE_MAX);
- char *buf = malloc(f);
- if (getgrgid_r(groups[i], grps[i], buf, f, &tmp) < 0) {
- perror("id");
- continue;
- }
- if (tmp == NULL) {
- perror("id");
+ char *buf = xmalloc(f);
+ if (getgrgid_r(groups[i], grps[i], buf, f, &tmp) < 0 || !tmp) {
+ perror_msg(0);
continue;
}
}
if (flags & FLAG_G) {
for (i = 0; i < ngroups; i++) {
- if (flags & FLAG_n)
- printf("%s%s", !i ? "" : " ", grps[i]->gr_name);
- else
- printf("%s%d", !i ? "" : " ", grps[i]->gr_gid);
+ if (i) xputc(' ');
+ if (flags & FLAG_n) printf("%s", grps[i]->gr_name);
+ else printf("%d", grps[i]->gr_gid);
}
printf("\n");
return;