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NAME

       fexecve - execute program specified via file descriptor

SYNOPSIS

       #include <unistd.h>

       int fexecve(int fd, char *const argv[], char *const envp[]);

   Feature Test Macro Requirements for glibc (see feature_test_macros(7)):

       fexecve():
           Since glibc 2.10:
               _XOPEN_SOURCE >= 700 || _POSIX_C_SOURCE >= 200809L
           Before glibc 2.10:
               _GNU_SOURCE

DESCRIPTION

       fexecve()  performs  the  same  task as execve(2), with the difference that the file to be
       executed is specified via a file descriptor, fd, rather than via  a  pathname.   The  file
       descriptor fd must be opened read-only, and the caller must have permission to execute the
       file that it refers to.

RETURN VALUE

       A successful call to fexecve() never returns.  On error,  the  function  returns,  with  a
       result value of -1, and errno is set appropriately.

ERRORS

       Errors are as for execve(2), with the following additions:

       EINVAL fd is not a valid file descriptor, or argv is NULL, or envp is NULL.

       ENOSYS The /proc file system could not be accessed.

VERSIONS

       fexecve() is implemented since glibc 2.3.2.

CONFORMING TO

       POSIX.1-2008.  This function is not specified in POSIX.1-2001, and is not widely available
       on other systems.

NOTES

       On Linux, fexecve() is implemented using the proc(5) file system, so  /proc  needs  to  be
       mounted and available at the time of the call.

SEE ALSO

       execve(2)

COLOPHON

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