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| author | Florian Weimer <fweimer@redhat.com> | 2020-04-02 17:09:36 +0200 |
|---|---|---|
| committer | Florian Weimer <fweimer@redhat.com> | 2020-04-03 16:26:10 +0200 |
| commit | cea56af185eae45b1f0963351e3d4daa1cbde521 (patch) | |
| tree | 2fca166caab3aaf9ce9f07bb719d0546cff3e4d2 /support/xstdio.h | |
| parent | 17fd707f88c5531972c980a4f4567ba6c7f84067 (diff) | |
| download | glibc-cea56af185eae45b1f0963351e3d4daa1cbde521.zip glibc-cea56af185eae45b1f0963351e3d4daa1cbde521.tar.gz glibc-cea56af185eae45b1f0963351e3d4daa1cbde521.tar.bz2 | |
support: Change xgetline to return 0 on EOF
The advantage is that the buffer will always contain the number
of characters as returned from the function, which allows one to use
a sequence like
/* No more audit module output. */
line_length = xgetline (&buffer, &buffer_length, fp);
TEST_COMPARE_BLOB ("", 0, buffer, line_length);
to check for an expected EOF, while also reporting any unexpected
extra data encountered.
Reviewed-by: Carlos O'Donell <carlos@redhat.com>
Diffstat (limited to 'support/xstdio.h')
| -rw-r--r-- | support/xstdio.h | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/support/xstdio.h b/support/xstdio.h index 143957b..807c3af 100644 --- a/support/xstdio.h +++ b/support/xstdio.h @@ -27,7 +27,10 @@ __BEGIN_DECLS FILE *xfopen (const char *path, const char *mode); void xfclose (FILE *); -ssize_t xgetline (char **lineptr, size_t *n, FILE *stream); +/* Read a line from FP, using getline. *BUFFER must be NULL, or a + heap-allocated pointer of *LENGTH bytes. Return the number of + bytes in the line if a line was read, or 0 on EOF. */ +size_t xgetline (char **lineptr, size_t *n, FILE *stream); __END_DECLS |