eb3ee3078a
Traditional VT-10x terminals (and their emulators) [0] have a "magic margins" feature that enables the last character position to be updated without scrolling the screen: whenever a character is printed on the last column, the cursor stays over the character, instead of moving to the next line. The Busybox shell, ash, attempts to defeat this feature by printing CR,LF right after echoing a character to the last column.[1] This doesn't play well with emulator.py. The run() method of the Emulator class captures the output of the emulated system and assumes the first line it reads is the echo of the command, and all subsequent lines are the command's output. If the line made by the command + shell prompt is longer than 80 characters, then it is echoed as two or more lines, and all but the first one are mistaken for the command's output. We fix this by telling the emulated system that we are using an ultra-wide terminal with 29999 columns. Larger values would be ignored and replaced by the default, namely 80 columns.[2] [0] https://vt100.net/docs/vt100-ug/chapter3.html - DECAWM [1] https://git.busybox.net/busybox/tree/libbb/lineedit.c?h=1_34_0#n412 [2] https://git.busybox.net/busybox/tree/libbb/xfuncs.c?h=1_34_0#n258 Signed-off-by: Edgar Bonet <bonet@grenoble.cnrs.fr> Reported-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com> Co-authored-by: Yann E. MORIN <yann.morin.1998@free.fr> Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr> |
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| board | ||
| boot | ||
| configs | ||
| docs | ||
| fs | ||
| linux | ||
| package | ||
| support | ||
| system | ||
| toolchain | ||
| utils | ||
| .defconfig | ||
| .flake8 | ||
| .gitignore | ||
| .gitlab-ci.yml | ||
| CHANGES | ||
| Config.in | ||
| Config.in.legacy | ||
| COPYING | ||
| DEVELOPERS | ||
| Makefile | ||
| Makefile.legacy | ||
| README | ||
Buildroot is a simple, efficient and easy-to-use tool to generate embedded Linux systems through cross-compilation. The documentation can be found in docs/manual. You can generate a text document with 'make manual-text' and read output/docs/manual/manual.text. Online documentation can be found at http://buildroot.org/docs.html To build and use the buildroot stuff, do the following: 1) run 'make menuconfig' 2) select the target architecture and the packages you wish to compile 3) run 'make' 4) wait while it compiles 5) find the kernel, bootloader, root filesystem, etc. in output/images You do not need to be root to build or run buildroot. Have fun! Buildroot comes with a basic configuration for a number of boards. Run 'make list-defconfigs' to view the list of provided configurations. Please feed suggestions, bug reports, insults, and bribes back to the buildroot mailing list: buildroot@buildroot.org You can also find us on #buildroot on OFTC IRC. If you would like to contribute patches, please read https://buildroot.org/manual.html#submitting-patches