When NSH_LIBRARY is not available, dpopen()/popen() can still execute
commands by splitting the command string by whitespace and calling
posix_spawnp() directly. Shell syntax (pipes, redirects, globbing)
is not supported in this mode.
Add CONFIG_SYSTEM_POPEN_MAXARGUMENTS (default 7) to control the
argv array size for the no-shell path.
Remove the hard dependency on NSH_LIBRARY from SYSTEM_POPEN so the
feature can be used in minimal configurations without a shell.
Signed-off-by: cuiziwei <cuiziwei@xiaomi.com>
Add dpopen()/dpclose() as the descriptor-based counterpart of
popen()/pclose(), analogous to how dprintf() relates to fprintf().
dpopen() returns a raw file descriptor instead of a FILE stream,
avoiding the stdio.h dependency for callers that only need an fd.
Refactor popen() as a thin wrapper: dpopen() + fdopen() + FILE
container. All pipe creation and process spawning logic now lives
in dpopen.c.
Also remove the hard dependency on NSH_LIBRARY from SYSTEM_POPEN.
When NSH is available, commands are executed through sh -c with full
shell syntax support. When NSH is not available, commands are split
by whitespace and executed directly via posix_spawnp().
Add CONFIG_SYSTEM_POPEN_MAXARGUMENTS (default 7) to control the
argv array size for the no-shell path.
Signed-off-by: cuiziwei <cuiziwei@xiaomi.com>
These had the larger default for the sim.
It's no longer necessary as DEFAULT_TASK_STACKSIZE
can have different default for each arch.
See also:
commit b1d44a81b4
Author: anchao <anchao@pinecone.net>
apps/, most main() function: Correct CONFIG_BUILD_LOADABLE usage
Loadable apps/: Correct loadable symbol table generate
apps/system/ubloxmodem: Fix build break
apps/examples/ostest: start restart/waitpid/user test from main loop
apps/nshlib: Expand reboot and poweroff commands to include a second, optional mode argument
Author: Gregory Nutt <gnutt@nuttx.org>
An attempt to fix build issues. Does not work.
apps/examples/ostest: Fix some inappropriate renaming of static functions introduced with recent patches.
apps/builtin/exec_builtin.c: Fix a error introduced by recent comments. Found in build testing.
Author: anchao <anchao@pinecone.net>
apps/builtin/exec_builtin.c: Try posix_spawn if builtin apps do not have have an entry point.
apps/Application.mk: introduce MODULE config to simplify tristate(m)
apps/nsh: Change the nuttx shell module type to tristate
apps: Add loadable application support
script/mksymtab: Generate symbol table name by default
apps/builtin: Allow loadable applications can register with apps/builtin.
apps/builtin/exec_builtin.c: Try posix_spawn if builtin apps do not have have an entry point.
apps/Application.mk: introduce MODULE config to simplify tristate(m)
apps/nsh: Change the nuttx shell module type to tristate
apps: Add loadable application support
script/mksymtab: Generate symbol table name by default
apps/builtin: Allow loadable applications can register with apps/builtin.
