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| author | Rich Felker <dalias@aerifal.cx> | 2013-08-17 22:21:11 -0400 |
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| committer | Rich Felker <dalias@aerifal.cx> | 2013-08-17 22:21:11 -0400 |
| commit | e678fc6f32e5e5c013ab4f99c38f5703b15ff6cd (patch) | |
| tree | de7c3f0b61f5da227bc978c5f3fc0f53180773ca /src/unistd | |
| parent | 109bd65acf5180f0a48ea4c4e5f2bc6884be202d (diff) | |
| download | musl-e678fc6f32e5e5c013ab4f99c38f5703b15ff6cd.tar.gz musl-e678fc6f32e5e5c013ab4f99c38f5703b15ff6cd.tar.xz musl-e678fc6f32e5e5c013ab4f99c38f5703b15ff6cd.zip | |
replace system's install command with a shell script
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.
Diffstat (limited to 'src/unistd')
0 files changed, 0 insertions, 0 deletions