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dd: don’t trust st_size on /proc/files

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* src/dd.c (skip): Don’t trust st_size == 0.
This commit is contained in:
Paul Eggert
2024-04-06 15:15:04 -07:00
parent 225cb8d747
commit ac6b8d8224
1 changed files with 1 additions and 1 deletions
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2
src/dd.c
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@@ -1809,7 +1809,7 @@ skip (int fdesc, char const *file, intmax_t records, idx_t blocksize,
struct stat st;
if (ifstat (STDIN_FILENO, &st) != 0)
error (EXIT_FAILURE, errno, _("cannot fstat %s"), quoteaf (file));
if (usable_st_size (&st) && 0 <= input_offset
if (usable_st_size (&st) && 0 < st.st_size && 0 <= input_offset
&& st.st_size - input_offset < offset)
{
/* When skipping past EOF, return the number of _full_ blocks