FEXECVE(3)

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
This page is part of release 3.38 of the Linux man-pages project. A description of the project, and information about reporting bugs, can be found at http://www.kernel.org/doc/man-pages/.