exec{l,v}{e,p} arrived in 7th Edition research Unix to support the Bourne Shell
which introduced environment variables. Document that here. Verified by consulting the TUHS archive.
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@ -322,6 +322,14 @@ and
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functions appeared in
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.At v2 .
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The
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.Fn execlp ,
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.Fn execle ,
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.Fn execve ,
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and
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.Fn execvp
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functions appeared in
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.At v7 .
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The
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.Fn execvP
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function first appeared in
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.Fx 5.2 .
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@ -346,7 +346,7 @@ system call conforms to The Open Group Extended API Set 2 specification.
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The
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.Fn execve
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system call appeared in
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.Bx 4.2 .
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.At V7 .
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The
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.Fn fexecve
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system call appeared in
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