[337] | 1 | #define _GNU_SOURCE
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| 2 | #include "pwf.h"
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| 3 | #include <grp.h>
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| 4 | #include <string.h>
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| 5 | #include <limits.h>
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| 6 | #include <stdio.h>
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| 7 | #include <stdlib.h>
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| 8 | #include <byteswap.h>
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| 9 | #include <errno.h>
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| 10 | #include "nscd.h"
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| 11 |
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| 12 | int getgrouplist(const char *user, gid_t gid, gid_t *groups, int *ngroups)
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| 13 | {
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| 14 | int rv, nlim, ret = -1;
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| 15 | ssize_t i, n = 1;
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| 16 | struct group gr;
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| 17 | struct group *res;
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| 18 | FILE *f;
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| 19 | int swap = 0;
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| 20 | int32_t resp[INITGR_LEN];
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| 21 | uint32_t *nscdbuf = 0;
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| 22 | char *buf = 0;
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| 23 | char **mem = 0;
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| 24 | size_t nmem = 0;
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| 25 | size_t size;
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| 26 | nlim = *ngroups;
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| 27 | if (nlim >= 1) *groups++ = gid;
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| 28 |
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| 29 | f = __nscd_query(GETINITGR, user, resp, sizeof resp, &swap);
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| 30 | if (!f) goto cleanup;
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| 31 | if (resp[INITGRFOUND]) {
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| 32 | nscdbuf = calloc(resp[INITGRNGRPS], sizeof(uint32_t));
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| 33 | if (!nscdbuf) goto cleanup;
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| 34 | if (!fread(nscdbuf, sizeof(*nscdbuf)*resp[INITGRNGRPS], 1, f)) {
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| 35 | if (!ferror(f)) errno = EIO;
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| 36 | goto cleanup;
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| 37 | }
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| 38 | if (swap) {
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| 39 | for (i = 0; i < resp[INITGRNGRPS]; i++)
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| 40 | nscdbuf[i] = bswap_32(nscdbuf[i]);
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| 41 | }
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| 42 | }
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| 43 | fclose(f);
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| 44 |
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| 45 | f = fopen("/etc/group", "rbe");
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| 46 | if (!f && errno != ENOENT && errno != ENOTDIR)
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| 47 | goto cleanup;
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| 48 |
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| 49 | if (f) {
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| 50 | while (!(rv = __getgrent_a(f, &gr, &buf, &size, &mem, &nmem, &res)) && res) {
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| 51 | if (nscdbuf)
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| 52 | for (i=0; i < resp[INITGRNGRPS]; i++) {
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| 53 | if (nscdbuf[i] == gr.gr_gid) nscdbuf[i] = gid;
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| 54 | }
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| 55 | for (i=0; gr.gr_mem[i] && strcmp(user, gr.gr_mem[i]); i++);
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| 56 | if (!gr.gr_mem[i]) continue;
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| 57 | if (++n <= nlim) *groups++ = gr.gr_gid;
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| 58 | }
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| 59 | if (rv) {
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| 60 | errno = rv;
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| 61 | goto cleanup;
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| 62 | }
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| 63 | }
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| 64 | if (nscdbuf) {
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| 65 | for(i=0; i < resp[INITGRNGRPS]; i++) {
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| 66 | if (nscdbuf[i] != gid)
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| 67 | if(++n <= nlim) *groups++ = nscdbuf[i];
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| 68 | }
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| 69 | }
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| 70 |
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| 71 | ret = n > nlim ? -1 : n;
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| 72 | *ngroups = n;
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| 73 |
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| 74 | cleanup:
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| 75 | if (f) fclose(f);
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| 76 | free(nscdbuf);
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| 77 | free(buf);
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| 78 | free(mem);
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| 79 | return ret;
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| 80 | }
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