xnu-3248.20.55.tar.gz

[apple/xnu.git] / bsd / man / man2 / execve.2

diff --git a/bsd/man/man2/execve.2 b/bsd/man/man2/execve.2
index c5c9838e611f1925f93879c7f443cb83c8d4ec11..6f7e4f3369e1141cef753f437c1fc18a749f9583 100644 (file)
--- a/bsd/man/man2/execve.2
+++ b/bsd/man/man2/execve.2
@@ -42,7 +42,11 @@
 .Sh SYNOPSIS
 .Fd #include <unistd.h>
 .Ft int
 .Sh SYNOPSIS
 .Fd #include <unistd.h>
 .Ft int

-.Fn execve "const char *path" "char *const argv[]" "char *const envp[]"
+.Fo execve
+.Fa "const char *path"
+.Fa "char *const argv[]"
+.Fa "char *const envp[]"
+.Fc

 .Sh DESCRIPTION
 .Fn Execve
 transforms the calling process into a new process.
 .Sh DESCRIPTION
 .Fn Execve
 transforms the calling process into a new process.


@@ -64,26 +68,26 @@ An interpreter file begins with a line of the form:
 .Bd -filled -offset indent -compact
 .Sy \&#!
 .Em interpreter
 .Bd -filled -offset indent -compact
 .Sy \&#!
 .Em interpreter

-.Bq Em arg
+.Bq Em arg ...

 .Ed
 .Pp
 When an interpreter file is
 .Fn execve Ap d ,
 .Ed
 .Pp
 When an interpreter file is
 .Fn execve Ap d ,

-the system
-.Fn execve Ap s
-runs the specified
+the system runs the specified

 .Em interpreter .
 .Em interpreter .

-If the optional
-.Em arg
-is specified, it becomes the first argument to the
-.Em interpreter ,
-and the name of the originally
+If any optional
+.Em args
+are specified, they become the first (second, ...) argument to the
+.Em interpreter.
+The name of the originally

 .Fn execve Ap d
 .Fn execve Ap d

-file becomes the second argument;
+file becomes the subsequent argument;

 otherwise, the name of the originally
 .Fn execve Ap d
 otherwise, the name of the originally
 .Fn execve Ap d

-file becomes the first argument.  The original arguments are shifted over to
-become the subsequent arguments.  The zeroth argument, normally the name of the
+file is the first argument.
+The original arguments to the invocation of the interpreter
+are shifted over to become the final arguments.
+The zeroth argument, normally the name of the

 .Fn execve Ap d
 file, is left unchanged.
 .Pp
 .Fn execve Ap d
 file, is left unchanged.
 .Pp


@@ -183,63 +187,47 @@ to the arguments themselves.
 .Sh RETURN VALUES
 As the
 .Fn execve
 .Sh RETURN VALUES
 As the
 .Fn execve

-function overlays the current process image 
-with a new process image the successful call
-has no process to return to.
+function overlays the current process image  with a new process image,
+the successful call has no process to return to.

 If
 .Fn execve
 If
 .Fn execve

-does return to the calling process an error has occurred; the
-return value will be -1 and the global variable
+does return to the calling process, an error has occurred;
+the return value will be -1 and the global variable

 .Va errno
 is set to indicate the error.
 .Sh ERRORS
 .Fn Execve
 will fail and return to the calling process if:
 .Bl -tag -width Er
 .Va errno
 is set to indicate the error.
 .Sh ERRORS
 .Fn Execve
 will fail and return to the calling process if:
 .Bl -tag -width Er

-.It Bq Er ENOTDIR
-A component of the path prefix is not a directory.
-.It Bq Er ENAMETOOLONG
-A component of a pathname exceeded 
-.Dv {NAME_MAX}
-characters, or an entire path name exceeded 
-.Dv {PATH_MAX}
-characters.
-.It Bq Er ENOENT
-The new process file does not exist.
-.It Bq Er ELOOP
-Too many symbolic links were encountered in translating the pathname.
+.\" ==========
+.It Bq Er E2BIG
+The number of bytes in the new process's argument list
+is larger than the system-imposed limit.
+This limit is specified by the
+.Xr sysctl 3
+MIB variable
+.Dv KERN_ARGMAX .
+.\" ==========

 .It Bq Er EACCES
 Search permission is denied for a component of the path prefix.
 .It Bq Er EACCES
 Search permission is denied for a component of the path prefix.

+.\" ==========

 .It Bq Er EACCES
 The new process file is not an ordinary file.
 .It Bq Er EACCES
 The new process file is not an ordinary file.

+.\" ==========

 .It Bq Er EACCES
 The new process file mode denies execute permission.
 .It Bq Er EACCES
 The new process file mode denies execute permission.

+.\" ==========

 .It Bq Er EACCES
 .It Bq Er EACCES

-The new process file is on a filesystem mounted with execution
-disabled
+The new process file is on a filesystem mounted
+with execution disabled

 .Pf ( Dv MNT_NOEXEC
 in
 .Ao Pa sys/mount.h Ac ) .
 .Pf ( Dv MNT_NOEXEC
 in
 .Ao Pa sys/mount.h Ac ) .

-.It Bq Er ENOEXEC
-The new process file has the appropriate access
-permission, but has an invalid magic number in its header.
-.It Bq Er ETXTBSY
-The new process file is a pure procedure (shared text)
-file that is currently open for writing or reading by some process.
-.It Bq Er ENOMEM
-The new process requires more virtual memory than
-is allowed by the imposed maximum
-.Pq Xr getrlimit 2 .
-.It Bq Er E2BIG
-The number of bytes in the new process's argument list
-is larger than the system-imposed limit.
-The limit in the system as released is 20480 bytes
-.Pf ( Dv NCARGS
-in
-.Ao Pa sys/param.h Ac ) .
+.\" ==========

 .It Bq Er EFAULT
 The new process file is not as long as indicated by
 the size values in its header.
 .It Bq Er EFAULT
 The new process file is not as long as indicated by
 the size values in its header.

+.\" ==========

 .It Bq Er EFAULT
 .Fa Path ,
 .Fa argv ,
 .It Bq Er EFAULT
 .Fa Path ,
 .Fa argv ,


@@ -247,8 +235,40 @@ or
 .Fa envp
 point
 to an illegal address.
 .Fa envp
 point
 to an illegal address.

+.\" ==========

 .It Bq Er EIO
 An I/O error occurred while reading from the file system.
 .It Bq Er EIO
 An I/O error occurred while reading from the file system.

+.\" ==========
+.It Bq Er ELOOP
+Too many symbolic links were encountered in translating the pathname.
+This is taken to be indicative of a looping symbolic link.
+.\" ==========
+.It Bq Er ENAMETOOLONG
+A component of a pathname exceeded 
+.Dv {NAME_MAX}
+characters, or an entire path name exceeded 
+.Dv {PATH_MAX}
+characters.
+.\" ==========
+.It Bq Er ENOENT
+The new process file does not exist.
+.\" ==========
+.It Bq Er ENOEXEC
+The new process file has the appropriate access
+permission, but has an unrecognized format
+(e.g., an invalid magic number in its header).
+.\" ==========
+.It Bq Er ENOMEM
+The new process requires more virtual memory than
+is allowed by the imposed maximum
+.Pq Xr getrlimit 2 .
+.\" ==========
+.It Bq Er ENOTDIR
+A component of the path prefix is not a directory.
+.\" ==========
+.It Bq Er ETXTBSY
+The new process file is a pure procedure (shared text)
+file that is currently open for writing or reading by some process.

 .El
 .Sh CAVEAT
 If a program is
 .El
 .Sh CAVEAT
 If a program is


@@ -262,6 +282,7 @@ of a super-user as well.
 .Xr exit 2 ,
 .Xr fork 2 ,
 .Xr execl 3 ,
 .Xr exit 2 ,
 .Xr fork 2 ,
 .Xr execl 3 ,

+.Xr sysctl 3 ,

 .Xr environ 7
 .Sh HISTORY
 The
 .Xr environ 7
 .Sh HISTORY
 The