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Joachim Wiberg
0721b0fec2
Three private ones had grown: fnread() in util.c, flen() behind pid_cmdline()/pid_cgroup() in cgutil.c, and conf_read_template() in conf.c. Two of them were also wrong in ways the others were not. fnread() formatted the path into a char[256] and stat()ed it before opening, so a longer path was silently truncated and then read from whichever file the truncation happened to name, and the size could change between the look and the read. flen() existed because neither of those approaches works on procfs at all, where stat() reports zero and the only way to learn the size is to read to EOF. Add fslurp() to util.[ch], which every tool already links. It opens first and sizes the fd it holds, treats st_size as a hint, and reads until EOF, so procfs and regular files take the same path. Paths are formatted by libite's vfopenf(), which allocates to fit. Callers that need the byte count, /proc/PID/cmdline embeds NUL, ask for it. fnread() keeps its signature and becomes a bounded copy out of the result, so its one caller is unaffected. Signed-off-by: Joachim Wiberg <troglobit@gmail.com>
Finit is a fast, simple alternative to SysV init and systemd, designed for small and embedded Linux systems. It can also run on desktop and server systems, like finix.
Reverse engineered from the EeePC fastinit
"gaps filled with frog DNA …"
— Claudio Matsuoka
For detailed information, explore our extensive documentation
📚 http://finit-project.github.io
For working examples, see the 🚀 contrib/ section or these tutorials:
- 🛠️ Buildroot embedded Linux,
- 📦 Debian GNU/Linux,
- ⛰️ Alpine Linux, and
- 🌌 Void Linux
Note
Finit can run on various Linux distributions, but the bundled install scripts are examples only. They have been tested on amd64 (x86_64) systems with standard configurations.
For embedded systems, see these Buildroot-based examples: myLinux, Infix, or br2-finit-demo.