mirrors/cosmopolitan
1
0
Fork 0
mirror of https://github.com/jart/cosmopolitan.git synced 2025-06-28 07:18:30 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions 1

Improve docs of more system calls

Browse source 
This change also found a few POSIX compliance bugs with errnos. Another
bug was discovered where, on Windows, pread() and pwrite() could modify
the file position in cases where ReadFile() returned an error e.g. when
seeking past the end of file. We also have more tests!
This commit is contained in:
Justine Tunney 2022-10-02 22:14:33 -07:00
parent af24c19db3
commit ccbae7799e
No known key found for this signature in database
GPG key ID: BE714B4575D6E328
39 changed files with 589 additions and 175 deletions
Download patch file Download diff file Expand all files Collapse all files

4
libc/calls/read.c
View file

@ -33,6 +33,9 @@
/**
* Reads data from file descriptor.
*
* This function changes the current file position. For documentation
* on file position behaviors and gotchas, see the lseek() function.
*
* @param fd is something open()'d earlier
* @param buf is copied into, cf. copy_file_range(), sendfile(), etc.
* @param size in range [1..0x7ffff000] is reasonable
@ -41,6 +44,7 @@
* @see write(), pread(), readv()
* @asyncsignalsafe
* @restartable
* @vforksafe
*/
ssize_t read(int fd, void *buf, size_t size) {
ssize_t rc;