ARG_MAX
| Shells
| whatshell
| portability
| permissions
| UUOC
| ancient
| -
| ../Various
| HOME
"$@"
| echo/printf
| set -e
| test
| tty defs
| tty chars
| $()
vs )
| IFS
| using siginfo
| nanosleep
| line charset
| locale
I am glad to have found the following in the CSRG Archive CD-ROMs.
The following was released under the licenses of BSD and Caldera.
Here are extracts from 4.4BSD /usr/src/sys/kern/kern_exec.c:
* @(#)kern_exec.c 8.1 (Berkeley) 6/10/93 [...] execve(p, uap, retval) [...] { [...] switch ((int)exdata.ex_exec.a_magic) { [...] default: if (exdata.ex_shell[0] != '#' || exdata.ex_shell[1] != '!' || indir) { error = ENOEXEC; goto bad; } [...] uid = cred->cr_uid; /* shell scripts can't be setuid */ gid = cred->cr_gid;