getpwent, setpwent, endpwent — get password file entry
#include <sys/types.h> #include <pwd.h>
struct passwd *getpwent( |
void) ; |
void
setpwent( |
void) ; |
void
endpwent( |
void) ; |
The getpwent
() function
returns a pointer to a structure containing the broken-out
fields of a record from the password database (e.g., the
local password file /etc/passwd
, NIS, and LDAP). The first time
it is called it returns the first entry; thereafter, it
returns successive entries.
The setpwent
() function
rewinds to the beginning of the password database.
The endpwent
() function is
used to close the password database after all processing has
been performed.
The passwd
structure is defined in <pwd.h>
as follows:
struct passwd { char * pw_name
;/* user name */ char * pw_passwd
;/* user password */ uid_t pw_uid
;/* user ID */ gid_t pw_gid
;/* group ID */ char * pw_gecos
;/* real name */ char * pw_dir
;/* home directory */ char * pw_shell
;/* shell program */ };
The getpwent
() function
returns a pointer to a passwd
structure, or NULL if
there are no more entries or an error occurs. If an error
occurs, errno
is set
appropriately. If one wants to check errno
after the call, it should be set to
zero before the call.
A signal was caught.
I/O error.
The maximum number (OPEN_MAX) of files was open already in the calling process.
The maximum number of files was open already in the system.
Insufficient memory to allocate passwd structure.
Insufficient buffer space supplied.
fgetpwent(3), getpw(3), getpwent_r(3), getpwnam(3), getpwuid(3), putpwent(3), passwd(5)
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