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fexecve - execute program specified via file descriptor
#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
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.
A successful call to fexecve() never returns. On error, the function returns, with a result value of -1, and errno is set appropriately.
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.
fexecve() is implemented since glibc 2.3.2.
POSIX.1-2008. This function is not specified in POSIX.1-2001, and is not widely available on other systems.
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.
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