1 | /* vi: set sw=4 ts=4: */
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2 | /*
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3 | * Utility routines.
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4 | *
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5 | * Copyright (C) many different people.
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6 | * If you wrote this, please acknowledge your work.
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7 | *
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8 | * This program is free software; you can redistribute it and/or modify
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9 | * it under the terms of the GNU General Public License as published by
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10 | * the Free Software Foundation; either version 2 of the License, or
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11 | * (at your option) any later version.
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12 | *
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13 | * This program is distributed in the hope that it will be useful,
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14 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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15 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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16 | * General Public License for more details.
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17 | *
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18 | * You should have received a copy of the GNU General Public License
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19 | * along with this program; if not, write to the Free Software
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20 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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21 | */
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22 |
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23 |
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24 | #include <stdio.h>
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25 | #include <stdlib.h>
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26 | #include <string.h>
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27 |
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28 | #include "libbb.h"
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29 |
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30 | /* Read up to (and including) TERMINATING_STRING from FILE and return it.
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31 | * Return NULL on EOF. */
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32 |
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33 | char *fgets_str(FILE *file, const char *terminating_string)
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34 | {
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35 | char *linebuf = NULL;
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36 | const int term_length = strlen(terminating_string);
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37 | int end_string_offset;
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38 | int linebufsz = 0;
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39 | int idx = 0;
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40 | int ch;
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41 |
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42 | while (1) {
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43 | ch = fgetc(file);
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44 | if (ch == EOF) {
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45 | free(linebuf);
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46 | return NULL;
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47 | }
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48 |
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49 | /* grow the line buffer as necessary */
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50 | while (idx > linebufsz - 2) {
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51 | linebuf = xrealloc(linebuf, linebufsz += 1000);
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52 | }
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53 |
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54 | linebuf[idx] = ch;
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55 | idx++;
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56 |
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57 | /* Check for terminating string */
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58 | end_string_offset = idx - term_length;
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59 | if ((end_string_offset > 0) && (memcmp(&linebuf[end_string_offset], terminating_string, term_length) == 0)) {
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60 | idx -= term_length;
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61 | break;
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62 | }
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63 | }
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64 | linebuf[idx] = '\0';
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65 | return(linebuf);
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66 | }
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67 |
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