1 | /* Copyright 1988, 1998 by the Massachusetts Institute of Technology. |
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2 | * |
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3 | * Permission to use, copy, modify, and distribute this |
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4 | * software and its documentation for any purpose and without |
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5 | * fee is hereby granted, provided that the above copyright |
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6 | * notice appear in all copies and that both that copyright |
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7 | * notice and this permission notice appear in supporting |
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8 | * documentation, and that the name of M.I.T. not be used in |
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9 | * advertising or publicity pertaining to distribution of the |
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10 | * software without specific, written prior permission. |
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11 | * M.I.T. makes no representations about the suitability of |
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12 | * this software for any purpose. It is provided "as is" |
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13 | * without express or implied warranty. |
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14 | */ |
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15 | |
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16 | static const char rcsid[] = "$Id: read_to_memory.c,v 1.1 1999-12-08 22:06:46 danw Exp $"; |
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17 | |
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18 | #include "globalmessage.h" |
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19 | |
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20 | Code_t read_to_memory(char **ret_block, int *ret_size, int filedesc) |
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21 | { |
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22 | char buf[BFSZ], *message_data = NULL; |
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23 | int message_size = 0; |
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24 | int stat; |
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25 | |
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26 | do { |
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27 | /* read the block */ |
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28 | stat = read(filedesc, buf, BFSZ); |
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29 | if(stat == -1) { |
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30 | /* handle read failed error */ |
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31 | free(message_data); |
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32 | return(errno); |
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33 | } |
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34 | |
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35 | /* allocate a memory area for copying */ |
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36 | /* the +1 are for trailing NULs */ |
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37 | message_data = realloc(message_data, message_size + stat + 1); |
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38 | if(!message_data) { |
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39 | return(GMS_MALLOC_ERR); |
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40 | } |
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41 | |
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42 | /* copy it into the right place */ |
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43 | memcpy(&message_data[message_size], buf, stat); |
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44 | |
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45 | message_size += stat; |
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46 | } while(stat); |
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47 | /* but only until we stop getting blocks. */ |
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48 | |
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49 | /* Just to make it consistent, for lazy calling routines... */ |
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50 | message_data[message_size] = '\0'; |
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51 | |
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52 | *ret_block = message_data; |
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53 | *ret_size = message_size; |
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54 | return(0); |
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55 | } |
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56 | |
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