EXECVE
Section: Linux Programmer's Manual (2)
Updated: 21 August 1994
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NAME
execve - execute program
SYNOPSIS
#include <unistd.h>
int execve (const char *filename, const char *argv
[], const char *envp[]);
DESCRIPTION
execve() executes the program pointed to by filename.
filename must be either a binary executable, or a shell script
starting with a line of the form "#! interpreter [arg]".
execve() does not return on success, and the text, data, bss, and
stack of the calling process are overwritten by that of the program
loaded. The program invoked inherits the calling process's PID, and any
open file descriptors that are not set to close on exec. Signals pending
on the parent process are cleared.
If the current program is being ptraced, a SIGTRAP is sent to it
after a successful execve().
RETURN VALUE
On success, execve() does not return, on error -1 is returned, and
errno
is set appropriately.
ERRORS
- EACCES
-
The file is not a regular file.
- EACCES
-
Execute permission is denied for the file.
- EPERM
-
The file system is mounted
noexec.
- EPERM
-
The file system is mounted
nosuid
and the file has an SUID or SGID bit set.
- E2BIG
-
The argument list is too big.
- ENOEXEC
-
The magic number in the file is incorrect.
- EFAULT
-
filename
points outside your accessible address space.
- ENAMETOOLONG
-
filename
is too long.
- ENOENT
-
The file does not exist.
- ENOMEM
-
Insufficient kernel memory was available.
- ENOTDIR
-
A component of the path prefix is not a directory.
- EACCES
-
Search permission is denied on a component of the path prefix.
- ELOOP
-
filename
contains a circular reference (i.e., via a symbolic link)
CONFORMING TO
SVID, AT&T, POSIX, X/OPEN, BSD 4.3
NOTES
SUID and SGID processes can not be ptrace()'d SUID or SGID.
A maximum line length of 127 characters is allowed for the first line in
a #! executable shell script. This may be circumvented by changing the
max size of buf, in which case you will become bound by the 1024 byte
size of a buffer, which is not easily worked around.
SEE ALSO
execl(3), fork(2)
Index
- NAME
-
- SYNOPSIS
-
- DESCRIPTION
-
- RETURN VALUE
-
- ERRORS
-
- CONFORMING TO
-
- NOTES
-
- SEE ALSO
-
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