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libc: fix fseek behavior with active read?

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This commit is contained in:
K. Lange 2021-06-05 19:49:09 +09:00
parent b72a8c7643
commit 6e94848afb
1 changed files with 4 additions and 4 deletions
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8
libc/stdio/stdio.c
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@ -367,16 +367,16 @@ static char * _whence_str(int whence) {
} }
int fseek(FILE * stream, long offset, int whence) { int fseek(FILE * stream, long offset, int whence) {
if (_argv_0 && strcmp(_argv_0, "ld.so")) { if (stream->read_from && whence == SEEK_CUR) {
if (stream->read_from && whence == SEEK_CUR) { if (_argv_0 && strcmp(_argv_0, "ld.so")) {
if (__libc_debug) { if (__libc_debug) {
fprintf(stderr, "%s: fseek(%s, %ld, %s)\n", _argv_0, stream->_name, offset, _whence_str(whence)); fprintf(stderr, "%s: fseek(%s, %ld, %s)\n", _argv_0, stream->_name, offset, _whence_str(whence));
fprintf(stderr, "\033[33;3mWARNING\033[0m: seeking when offset is currently %d\n", stream->read_from); fprintf(stderr, "\033[33;3mWARNING\033[0m: seeking when offset is currently %d\n", stream->read_from);
fprintf(stderr, "\033[33;3mWARNING\033[0m: this may not be reflected in kernel\n"); fprintf(stderr, "\033[33;3mWARNING\033[0m: this may not be reflected in kernel\n");
} }
offset = offset + stream->read_from + stream->last_read_start;
whence = SEEK_SET;
} }
offset = offset + stream->read_from + stream->last_read_start;
whence = SEEK_SET;
} }
if (stream->written) { if (stream->written) {
fflush(stream); fflush(stream);