Yu Watanabe 4f18ff2e29 tree-wide: include unistd.h where necessary ...

We use symbols provided by unistd.h without including it. E.g.
open(), close(), read(), write(), access(), symlink(), unlink(), rmdir(),
fsync(), syncfs(), lseek(), ftruncate(), fchown(), dup2(), pipe2(),
getuid(), getgid(), gettid(), getppid(), pipe2(), execv(), _exit(),
environ, STDIN_FILENO, STDOUT_FILENO, STDERR_FILENO, F_OK, and their
friends and variants, so on.

Currently, unistd.h is indirectly included mainly in the following two paths:
- through missing_syscall.h, which is planned to covert to .c file.
- through signal.h -> bits/sigstksz.h, which is new since glibc-2.34.
  Note, signal.h is included by sd-eevent.h. So, many source files
  indirectly include unistd.h if newer glibc is used.

Currently, our baseline on glibc is 2.31. We need to support glibc older
than 2.34, but unfortunately, we do not have any CI environments with
such old glibc. CIFuzz uses glibc-2.31, but it builds only fuzzers, and
many files are even not compiled.

2025-06-30 09:19:15 +02:00

..

meson.build

meson: move declarations of cgroups-agent, id128, volatile-root, and path

2023-08-01 15:54:45 +09:00

volatile-root.c

tree-wide: include unistd.h where necessary

2025-06-30 09:19:15 +02:00