shadow.h -- Header File

Definitions used with shadow passwords
#include <shadow.h>

The  header  file  <shadow.h>  declares  and defines  the  functions,
macros, structures, and constants used to manipulate shadow passwords.

<shadow.h>  holds defines  the  structure spwd,  which describes  the
records  that are  stored in file  /etc/shadow. <shadow.h>  gives two
definitions  spwd: one  implements  the structure  used by  UNIX System  V,
release 4;  and the other implements  the structure used by  UNIX System V,
release 3.

The following gives the form of  spwd that is used by some releases of UNIX
System V, release 4:

struct spwd {
    char *sp_namp;  /* User Name */
    char *sp_pwdp;  /* Encrypted password */
    long sp_lstchg; /* Last changed date */
    long sp_min;
    long sp_max;
    long sp_warn;
    long sp_inact;
    long sp_expire; /* Acct expiration date. */
    unsigned long sp_flag;
};

The following gives the version of spwd used by UNIX System V, release 3:

struct  spwd {
    char *sp_name; /* User name */
    char *sp_passwd; /* Encrypted password - non-POSIX */
    int sp_uid; /* User id */
    int sp_gid; /* Group id */
    int sp_quota; /* File space quota  - non-POSIX*/
    char *sp_comment; /* Comments - non-POSIX */
    char *sp_gecos; /* Gecos box number - non-POSIX */
    char *sp_dir; /* Working directory */
    char *sp_shell; /* Shell */
};

By default, COHERENT uses the System V, release 3, version of spwd.

For  information  on  how to  select  a  given  version  of spwd,  see  the
discussion of compilation environments in the Lexicon article header files.

See Also

header files,
endspent(),
getspent(),
getspnam(),
libc,
setspent(),
shadow

© 2012 by Stephen A. Ness