1 | #include "pwf.h"
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2 | #include <pthread.h>
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3 |
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4 | #define FIX(x) (gr->gr_##x = gr->gr_##x-line+buf)
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5 |
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6 | static int getgr_r(const char *name, gid_t gid, struct group *gr, char *buf, size_t size, struct group **res)
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7 | {
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8 | char *line = 0;
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9 | size_t len = 0;
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10 | char **mem = 0;
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11 | size_t nmem = 0;
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12 | int rv = 0;
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13 | size_t i;
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14 | int cs;
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15 |
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16 | pthread_setcancelstate(PTHREAD_CANCEL_DISABLE, &cs);
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17 |
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18 | rv = __getgr_a(name, gid, gr, &line, &len, &mem, &nmem, res);
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19 | if (*res && size < len + (nmem+1)*sizeof(char *) + 32) {
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20 | *res = 0;
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21 | rv = ERANGE;
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22 | }
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23 | if (*res) {
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24 | buf += (16-(uintptr_t)buf)%16;
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25 | gr->gr_mem = (void *)buf;
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26 | buf += (nmem+1)*sizeof(char *);
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27 | memcpy(buf, line, len);
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28 | FIX(name);
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29 | FIX(passwd);
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30 | for (i=0; mem[i]; i++)
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31 | gr->gr_mem[i] = mem[i]-line+buf;
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32 | gr->gr_mem[i] = 0;
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33 | }
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34 | free(mem);
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35 | free(line);
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36 | pthread_setcancelstate(cs, 0);
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37 | if (rv) errno = rv;
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38 | return rv;
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39 | }
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40 |
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41 | int getgrnam_r(const char *name, struct group *gr, char *buf, size_t size, struct group **res)
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42 | {
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43 | return getgr_r(name, 0, gr, buf, size, res);
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44 | }
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45 |
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46 | int getgrgid_r(gid_t gid, struct group *gr, char *buf, size_t size, struct group **res)
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47 | {
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48 | return getgr_r(0, gid, gr, buf, size, res);
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49 | }
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