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manual: Document the fexecve function

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Florian Weimer 2020-04-27 11:38:28 +02:00
parent b3cae39dcb
commit 6771af1123
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manual/process.texi
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@ -405,6 +405,19 @@ be an array of strings in the same format as for the @code{environ}
variable; see @ref{Environment Access}.
@end deftypefun
@deftypefun int fexecve (int @var{fd}, char *const @var{argv}@t{[]}, char *const @var{env}@t{[]})
@standards{POSIX.1, unistd.h}
@safety{@prelim{}@mtsafe{}@assafe{}@acsafe{}}
This is similar to @code{execve}, but instead identifying the progam
executable by its pathname, the file descriptor @var{fd} is used. The
descriptor must have been opened with the @code{O_RDONLY} flag or (on
Linux) the @code{O_PATH} flag.
On Linux, @code{fexecve} can fail with an error of @code{ENOSYS} if
@file{/proc} has not been mounted and the kernel lacks support for the
underlying @code{execveat} system call.
@end deftypefun
@deftypefun int execle (const char *@var{filename}, const char *@var{arg0}, @dots{}, char *const @var{env}@t{[]})
@standards{POSIX.1, unistd.h}
@safety{@prelim{}@mtsafe{}@asunsafe{@ascuheap{}}@acunsafe{@acsmem{}}}