1 | #include <stdio.h>
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2 | #include <string.h>
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3 | #include <mntent.h>
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4 | #include <errno.h>
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5 |
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6 | static char *internal_buf;
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7 | static size_t internal_bufsize;
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8 |
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9 | #define SENTINEL (char *)&internal_buf
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10 |
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11 | FILE *setmntent(const char *name, const char *mode)
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12 | {
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13 | return fopen(name, mode);
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14 | }
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15 |
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16 | int endmntent(FILE *f)
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17 | {
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18 | if (f) fclose(f);
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19 | return 1;
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20 | }
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21 |
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22 | struct mntent *getmntent_r(FILE *f, struct mntent *mnt, char *linebuf, int buflen)
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23 | {
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24 | int cnt, n[8], use_internal = (linebuf == SENTINEL);
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25 |
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26 | mnt->mnt_freq = 0;
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27 | mnt->mnt_passno = 0;
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28 |
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29 | do {
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30 | if (use_internal) {
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31 | getline(&internal_buf, &internal_bufsize, f);
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32 | linebuf = internal_buf;
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33 | } else {
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34 | fgets(linebuf, buflen, f);
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35 | }
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36 | if (feof(f) || ferror(f)) return 0;
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37 | if (!strchr(linebuf, '\n')) {
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38 | fscanf(f, "%*[^\n]%*[\n]");
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39 | errno = ERANGE;
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40 | return 0;
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41 | }
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42 | cnt = sscanf(linebuf, " %n%*s%n %n%*s%n %n%*s%n %n%*s%n %d %d",
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43 | n, n+1, n+2, n+3, n+4, n+5, n+6, n+7,
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44 | &mnt->mnt_freq, &mnt->mnt_passno);
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45 | } while (cnt < 2 || linebuf[n[0]] == '#');
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46 |
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47 | linebuf[n[1]] = 0;
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48 | linebuf[n[3]] = 0;
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49 | linebuf[n[5]] = 0;
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50 | linebuf[n[7]] = 0;
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51 |
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52 | mnt->mnt_fsname = linebuf+n[0];
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53 | mnt->mnt_dir = linebuf+n[2];
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54 | mnt->mnt_type = linebuf+n[4];
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55 | mnt->mnt_opts = linebuf+n[6];
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56 |
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57 | return mnt;
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58 | }
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59 |
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60 | struct mntent *getmntent(FILE *f)
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61 | {
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62 | static struct mntent mnt;
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63 | return getmntent_r(f, &mnt, SENTINEL, 0);
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64 | }
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65 |
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66 | int addmntent(FILE *f, const struct mntent *mnt)
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67 | {
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68 | if (fseek(f, 0, SEEK_END)) return 1;
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69 | return fprintf(f, "%s\t%s\t%s\t%s\t%d\t%d\n",
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70 | mnt->mnt_fsname, mnt->mnt_dir, mnt->mnt_type, mnt->mnt_opts,
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71 | mnt->mnt_freq, mnt->mnt_passno) < 0;
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72 | }
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73 |
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74 | char *hasmntopt(const struct mntent *mnt, const char *opt)
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75 | {
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76 | return strstr(mnt->mnt_opts, opt);
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77 | }
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