Last change
on this file since 1100 was 821, checked in by Bruno Cornec, 18 years ago |
Addition of busybox 1.2.1 as a mindi-busybox new package
This should avoid delivering binary files in mindi not built there (Fedora and Debian are quite serious about that)
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File size:
1.4 KB
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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) 1999-2005 by Erik Andersen <andersen@codepoet.org>
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6 | *
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7 | * Licensed under GPLv2 or later, see file LICENSE in this tarball for details.
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8 | */
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9 |
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10 | #include <errno.h>
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11 | #include <stdlib.h>
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12 | #include <string.h>
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13 | #include <unistd.h>
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14 |
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15 | #include "libbb.h"
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16 |
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17 |
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18 | #if BUFSIZ < 4096
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19 | #undef BUFSIZ
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20 | #define BUFSIZ 4096
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21 | #endif
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22 |
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23 |
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24 | static ssize_t bb_full_fd_action(int src_fd, int dst_fd, size_t size)
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25 | {
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26 | int status = -1;
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27 | size_t total = 0;
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28 | RESERVE_CONFIG_BUFFER(buffer,BUFSIZ);
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29 |
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30 | if (src_fd < 0) goto out;
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31 | while (!size || total < size)
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32 | {
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33 | ssize_t wrote, xread;
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34 |
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35 | xread = safe_read(src_fd, buffer,
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36 | (!size || size - total > BUFSIZ) ? BUFSIZ : size - total);
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37 |
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38 | if (xread > 0) {
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39 | /* A -1 dst_fd means we need to fake it... */
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40 | wrote = (dst_fd < 0) ? xread : bb_full_write(dst_fd, buffer, xread);
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41 | if (wrote < xread) {
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42 | bb_perror_msg(bb_msg_write_error);
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43 | break;
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44 | }
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45 | total += wrote;
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46 | if (total == size) status = 0;
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47 | } else if (xread < 0) {
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48 | bb_perror_msg(bb_msg_read_error);
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49 | break;
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50 | } else if (xread == 0) {
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51 | /* All done. */
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52 | status = 0;
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53 | break;
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54 | }
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55 | }
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56 |
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57 | out:
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58 | RELEASE_CONFIG_BUFFER(buffer);
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59 |
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60 | return status ? status : (ssize_t)total;
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61 | }
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62 |
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63 |
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64 | int bb_copyfd_size(int fd1, int fd2, const off_t size)
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65 | {
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66 | if (size) {
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67 | return(bb_full_fd_action(fd1, fd2, size));
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68 | }
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69 | return(0);
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70 | }
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71 |
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72 | int bb_copyfd_eof(int fd1, int fd2)
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73 | {
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74 | return(bb_full_fd_action(fd1, fd2, 0));
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75 | }
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