Age | Commit message (Collapse) | Author | Lines | |
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2014-01-15 | fix system breakage window during make install due to permissions | Rich Felker | -2/+1 | |
install.sh was wrongly waiting until after atomically replacing the old file to set the correct permissions on the new file. in the case of the dynamic linker, this would cause a dynamic-linked chmod command not to run (due to missing executable permissions on the dynamic linker) and thus leave the system in an unusable state. even if chmod is static-linked, the old behavior had a race window where dynamic-linked programs could fail to run. | ||||
2013-12-03 | fix mv usage in install.sh to avoid bogus interactive prompting | Rich Felker | -1/+1 | |
2013-08-17 | replace system's install command with a shell script | Rich Felker | -0/+65 | |
the historical (non-standardized) install command is really inappropriate for installing binaries/libraries on a system that utilizes memory-mapped executable files. rather than replacing an existing file atomically, it overwrites the existing file. this can cause running programs to see a partially-modified version of the file, resulting in unpredictable behavior, or SIGBUS. a MAP_COPY mode for mmap would get around this problem, but Linux lacks MAP_COPY. the shell script added with this commit works around the problem by writing temporary files and moving them into place. unlike the historical install utility, it also support a -l option for installing a symbolic link atomically, via the same method. |