Last change
on this file since 1114 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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Rev | Line | |
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[821] | 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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