40 lines
692 B
40 lines
692 B
#include "../git-compat-util.h" |
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void *git_mmap(void *start, size_t length, int prot, int flags, int fd, off_t offset) |
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{ |
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size_t n = 0; |
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if (start != NULL || !(flags & MAP_PRIVATE)) |
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die("Invalid usage of mmap when built with NO_MMAP"); |
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start = xmalloc(length); |
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if (start == NULL) { |
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errno = ENOMEM; |
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return MAP_FAILED; |
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} |
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while (n < length) { |
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ssize_t count = xpread(fd, (char *)start + n, length - n, offset + n); |
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if (count == 0) { |
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memset((char *)start+n, 0, length-n); |
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break; |
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} |
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if (count < 0) { |
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free(start); |
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errno = EACCES; |
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return MAP_FAILED; |
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} |
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n += count; |
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} |
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return start; |
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} |
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int git_munmap(void *start, size_t length) |
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{ |
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free(start); |
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return 0; |
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}
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