diff options
Diffstat (limited to 'lib/libc/sys/execve.2')
| -rw-r--r-- | lib/libc/sys/execve.2 | 28 |
1 files changed, 22 insertions, 6 deletions
diff --git a/lib/libc/sys/execve.2 b/lib/libc/sys/execve.2 index ba47e6d..b9fb131 100644 --- a/lib/libc/sys/execve.2 +++ b/lib/libc/sys/execve.2 @@ -178,6 +178,23 @@ and .Fa argv points to the array of character pointers to the arguments themselves. +.Sh IMPLEMENTATION NOTES +.Pp +In the non-threaded library +.Fn execve +is implemented as the +.Va execve +syscall. +.Pp +In the threaded library, the +.Va execve +syscall is assembled to +.Fn _thread_sys_execve +and +.Fn execve +is implemented as a function which performs user-thread +library re-initialization and then calls +.Fn _thread_sys_execve . .Sh RETURN VALUES As the .Fn execve @@ -196,8 +213,6 @@ will fail and return to the calling process if: .Bl -tag -width [ENAMETOOLONG] .It Bq Er ENOTDIR A component of the path prefix is not a directory. -.It Bq Er EINVAL -The pathname contains a character with the high-order bit set. .It Bq Er ENAMETOOLONG A component of a pathname exceeded 255 characters, or an entire path name exceeded 1023 characters. @@ -224,10 +239,10 @@ is allowed by the imposed maximum .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 +The limit in the system as released is 65536 bytes .Pf ( Dv NCARGS in -.Ao Pa sys/param.h Ac . +.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. @@ -250,12 +265,13 @@ the real is ``root'', then the program has some of the powers of a super-user as well. .Sh SEE ALSO -.Xr exit 2 , +.Xr _exit 2 , .Xr fork 2 , .Xr execl 3 , +.Xr exit 3 , .Xr environ 7 .Sh HISTORY The -.Nm +.Fn execve function call appeared in .Bx 4.2 . |
