talos-petitboot/lib/process, branch v1.3.2

lib/process: Add debug on process kill

2014-04-03T06:25:48+00:00

Signed-off-by: Jeremy Kerr

lib/process: Don't abort stdout reads on EINTR

2014-02-20T02:11:52+00:00

If our read() of the process stdout pipe fails with EINTR (eg, if we receive a SIGCHLD because the process exited), then process_read_stdout_once will return a non-zero exit code, and we'll abort any further stdout collection. Instead, we should check for EINTR, and allow the reads to continue. This change normalises the return value from process_read_stdout_once to return positive on success, negative on failure, and zero on competion. We use a positive return value for the non-error EINTR case. Also, add a pb_log if the read fails for non-EINTR reasons. Signed-off-by: Jeremy Kerr

lib/process: Add helper for check process clean exit

2014-01-21T05:36:01+00:00

We have a few incorrect checks for the exit status of a process; this change adds a helper with the correct WIFEXITED && WEXITSTATUS==0 logic. Signed-off-by: Jeremy Kerr

lib/process: Add add_stderr flag to process module

2014-01-14T07:55:21+00:00

For some process execution functions, we'd like to capture stderr as well as stdout. Currently, we unconditionally redirect subprocess stderr to the petitboot log file. This change adds an add_stderr flag to struct process, which indicates to the process library that we want stderr as well as stdout. If this is specified, the subprocess' stderr is captured to stdout_buf. Signed-off-by: Jeremy Kerr

lib/process: handle EINTR from waitpid

2013-08-20T02:30:57+00:00

Signed-off-by: Jeremy Kerr

lib/process: Add dry_run argument to process_init

2013-08-20T02:14:44+00:00

Implement dry-run behaviour on the discover server by passing a bool to process_init. UIs don't need to support dry runs. Signed-off-by: Jeremy Kerr

lib/process: Add process helpers

2013-08-19T05:27:59+00:00

We've grown-out of pb_run_cmd a little, as we have a number of different process types: boot(): - kexec: short-running process, run synchronously - boot hooks: short-running, run sync, need exit code & stdout network init: - interface configuration: short running, run sync - udhcp processes are long running, we may want completion, but doesn't block other actions downloads: - potentially long-running, block parse progress config nvram: - read: short running, can block, need stdout - write: short running, can block We'd like to introduce proper asynchronous processes, to allow config & boot-option downloads without blocking the discover server. This change introduces a new type for processes, 'struct process'. These structures are created with process_create, and run with process_run_sync or process_run_async. The latter reports completion through a callback member of struct process. Signed-off-by: Jeremy Kerr