8 static char *itoa(char *p, uint32_t x)
10 // number of digits in a uint32_t + NUL
20 int __getgr_a(const char *name, gid_t gid, struct group *gr, char **buf, size_t *size, char ***mem, size_t *nmem, struct group **res)
28 pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, &cs);
29 f = fopen("/etc/group", "rbe");
35 while (!(rv = __getgrent_a(f, gr, buf, size, mem, nmem, res)) && *res) {
36 if (name && !strcmp(name, (*res)->gr_name)
37 || !name && (*res)->gr_gid == gid) {
43 if (!*res && (rv == 0 || rv == ENOENT || rv == ENOTDIR)) {
44 int32_t req = name ? GETGRBYNAME : GETGRBYGID;
47 int32_t groupbuf[GR_LEN] = {0};
49 size_t grlist_len = 0;
50 char gidbuf[11] = {0};
57 if (gid < 0 || gid > UINT32_MAX) {
61 key = itoa(gidbuf, gid);
64 f = __nscd_query(req, key, groupbuf, sizeof groupbuf, &swap);
65 if (!f) { rv = errno; goto done; }
67 if (!groupbuf[GRFOUND]) { rv = 0; goto cleanup_f; }
69 if (!groupbuf[GRNAMELEN] || !groupbuf[GRPASSWDLEN]) {
74 if (groupbuf[GRNAMELEN] > SIZE_MAX - groupbuf[GRPASSWDLEN]) {
78 len = groupbuf[GRNAMELEN] + groupbuf[GRPASSWDLEN];
80 for (i = 0; i < groupbuf[GRMEMCNT]; i++) {
82 if (fread(&name_len, sizeof name_len, 1, f) < 1) {
83 rv = ferror(f) ? errno : EIO;
87 name_len = bswap_32(name_len);
89 if (name_len > SIZE_MAX - grlist_len
90 || name_len > SIZE_MAX - len) {
95 grlist_len += name_len;
98 if (len > *size || !*buf) {
99 char *tmp = realloc(*buf, len);
108 if (!fread(*buf, len, 1, f)) {
109 rv = ferror(f) ? errno : EIO;
113 if (groupbuf[GRMEMCNT] + 1 > *nmem) {
114 if (groupbuf[GRMEMCNT] + 1 > SIZE_MAX/sizeof(char*)) {
118 char **tmp = realloc(*mem, (groupbuf[GRMEMCNT]+1)*sizeof(char*));
124 *nmem = groupbuf[GRMEMCNT] + 1;
127 if (groupbuf[GRMEMCNT]) {
128 mem[0][0] = *buf + groupbuf[GRNAMELEN] + groupbuf[GRPASSWDLEN];
129 for (ptr = mem[0][0], i = 0; ptr != mem[0][0]+grlist_len; ptr++)
130 if (!*ptr) mem[0][++i] = ptr+1;
133 if (i != groupbuf[GRMEMCNT]) {
142 gr->gr_passwd = gr->gr_name + groupbuf[GRNAMELEN];
143 gr->gr_gid = groupbuf[GRGID];
146 if (gr->gr_passwd[-1]
147 || gr->gr_passwd[groupbuf[GRPASSWDLEN]-1]) {
152 if (name && strcmp(name, gr->gr_name)
153 || !name && gid != gr->gr_gid) {
166 pthread_setcancelstate(cs, 0);