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by hvdijk
1380 days ago
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Even /bin/sh is not guaranteed to exist, and when it does exist, it is not guranteed to be useful. It is not a location specified by POSIX, and implementations exist that do not place the standard sh utility in /bin. The big one was SunOS/Solaris, where /bin/sh did exist but was the pre-POSIX implementation, and /usr/xpg4/bin/sh existed for when you wanted POSIX sh. Android puts it in /system/bin/sh and not all of them have the compatibility symlink /bin -> /system/bin. There are probably other special cases as well. POSIX explicitly says "Applications should note that the standard PATH to the shell cannot be assumed to be either /bin/sh or /usr/bin/sh, and should be determined by interrogation of the PATH returned by getconf PATH [...]" |
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