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Fix #4270

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Kovid Goyal 2021-11-24 16:37:27 +05:30
parent 3592a94517
commit f081d6a421
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GPG Key ID: 06BC317B515ACE7C
1 changed files with 7 additions and 0 deletions
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7
kitty/disk-cache.c
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@ -117,6 +117,7 @@ static bool
copy_between_files(int infd, int outfd, off_t in_pos, size_t len, uint8_t *buf, size_t bufsz) { copy_between_files(int infd, int outfd, off_t in_pos, size_t len, uint8_t *buf, size_t bufsz) {
#ifdef HAS_SENDFILE #ifdef HAS_SENDFILE
(void)buf; (void)bufsz; (void)buf; (void)bufsz;
unsigned num_of_consecutive_zero_returns = 128;
while (len) { while (len) {
off_t r = in_pos; off_t r = in_pos;
ssize_t n = sendfile(outfd, infd, &r, len); ssize_t n = sendfile(outfd, infd, &r, len);
@ -124,6 +125,12 @@ copy_between_files(int infd, int outfd, off_t in_pos, size_t len, uint8_t *buf,
if (errno != EAGAIN) return false; if (errno != EAGAIN) return false;
continue; continue;
} }
if (n == 0) {
// happens if input file is truncated
if (!--num_of_consecutive_zero_returns) return false;
continue;
};
num_of_consecutive_zero_returns = 128;
in_pos += n; len -= n; in_pos += n; len -= n;
} }
#else #else