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FEXECVE(3)                 Linux Programmer's Manual                FEXECVE(3)



NAME
       fexecve - execute program specified via file descriptor

SYNOPSIS
       #define _GNU_SOURCE
       #include <unistd.h>

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

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
       This  page  is part of release 3.22 of the Linux man-pages project.  A description of the project, and informa-
       tion about reporting bugs, can be found at http://www.kernel.org/doc/man-pages/.



Linux                             2009-02-04                        FEXECVE(3)