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67 lines
1.3 KiB
67 lines
1.3 KiB
#include "cache.h" |
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int copy_fd(int ifd, int ofd) |
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{ |
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while (1) { |
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char buffer[8192]; |
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ssize_t len = xread(ifd, buffer, sizeof(buffer)); |
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if (!len) |
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break; |
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if (len < 0) |
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return COPY_READ_ERROR; |
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if (write_in_full(ofd, buffer, len) < 0) |
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return COPY_WRITE_ERROR; |
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} |
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return 0; |
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} |
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static int copy_times(const char *dst, const char *src) |
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{ |
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struct stat st; |
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struct utimbuf times; |
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if (stat(src, &st) < 0) |
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return -1; |
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times.actime = st.st_atime; |
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times.modtime = st.st_mtime; |
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if (utime(dst, ×) < 0) |
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return -1; |
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return 0; |
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} |
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int copy_file(const char *dst, const char *src, int mode) |
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{ |
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int fdi, fdo, status; |
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mode = (mode & 0111) ? 0777 : 0666; |
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if ((fdi = open(src, O_RDONLY)) < 0) |
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return fdi; |
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if ((fdo = open(dst, O_WRONLY | O_CREAT | O_EXCL, mode)) < 0) { |
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close(fdi); |
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return fdo; |
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} |
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status = copy_fd(fdi, fdo); |
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switch (status) { |
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case COPY_READ_ERROR: |
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error_errno("copy-fd: read returned"); |
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break; |
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case COPY_WRITE_ERROR: |
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error_errno("copy-fd: write returned"); |
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break; |
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} |
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close(fdi); |
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if (close(fdo) != 0) |
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return error_errno("%s: close error", dst); |
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if (!status && adjust_shared_perm(dst)) |
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return -1; |
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return status; |
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} |
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int copy_file_with_time(const char *dst, const char *src, int mode) |
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{ |
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int status = copy_file(dst, src, mode); |
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if (!status) |
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return copy_times(dst, src); |
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return status; |
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}
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