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Fix bugs and add security features to redbean

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- Fix a regression with the previous change that broke redbean
- Add chroot(), resource limit, seccomp, and other stuff to redbean
- Write lots and lots of documentation
- Iron out more system call issues
This commit is contained in:
Justine Tunney 2022-04-18 00:01:26 -07:00
parent f1dfa4bdfa
commit 7166679620
182 changed files with 1855 additions and 918 deletions
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29
libc/calls/writev.c
View file

@ -20,7 +20,9 @@
#include "libc/calls/calls.h"
#include "libc/calls/internal.h"
#include "libc/calls/strace.internal.h"
#include "libc/errno.h"
#include "libc/intrin/asan.internal.h"
#include "libc/intrin/kprintf.h"
#include "libc/sock/internal.h"
#include "libc/sysv/errfuns.h"
#include "libc/zipos/zipos.internal.h"
@ -44,7 +46,9 @@
* @restartable
*/
ssize_t writev(int fd, const struct iovec *iov, int iovlen) {
ssize_t rc;
int i;
ssize_t rc, rem;
if (fd >= 0 && iovlen >= 0) {
if (IsAsan() && !__asan_is_valid_iov(iov, iovlen)) {
rc = efault();
@ -67,6 +71,27 @@ ssize_t writev(int fd, const struct iovec *iov, int iovlen) {
} else {
rc = einval();
}
STRACE("writev(%d, %p, %d) → %'zd% m", fd, iov, iovlen, rc);
#if defined(SYSDEBUG) && _DATATRACE
if (__strace > 0) {
if (rc == -1 && errno == EFAULT) {
STRACE("writev(%d, %p, %d) → %'zd% m", fd, iov, iovlen, rc);
} else {
rem = rc != -1 ? rc : 0;
kprintf(STRACE_PROLOGUE "writev(%d, {", fd);
for (i = 0; i < MIN(5, iovlen); ++i) {
kprintf("%s{%#.*hhs%s, %'zu}", i ? ", " : "",
MAX(0, MIN(40, MIN(rem, iov[i].iov_len))), iov[i].iov_base,
MAX(0, MIN(40, MIN(rem, iov[i].iov_len))) < iov[i].iov_len
? "..."
: "",
iov[i].iov_len);
rem -= iov[i].iov_len;
}
kprintf("%s}, %d) → %'ld% m%n", iovlen > 5 ? "..." : "", iovlen, rc);
}
}
#endif
return rc;
}