putpwent - Man Page

write a password file entry

Synopsis

#include <stdio.h>
#include <sys/types.h>
#include <pwd.h>

int putpwent(const struct passwd *restrict p, FILE *restrict stream);

Feature Test Macro Requirements for glibc (see feature_test_macros(7)):

putpwent():

    Since glibc 2.19:
        _DEFAULT_SOURCE
    Glibc 2.19 and earlier:
        _SVID_SOURCE

Description

The putpwent() function writes a password entry from the structure p in the file associated with stream.

The passwd structure is defined in <pwd.h> as follows:

struct passwd {
    char    *pw_name;        /* username */
    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 */
};

Return Value

The putpwent() function returns 0 on success. On failure, it returns -1, and errno is set to indicate the error.

Errors

EINVAL

Invalid (NULL) argument given.

Attributes

For an explanation of the terms used in this section, see attributes(7).

InterfaceAttributeValue
putpwent()Thread safetyMT-Safe locale

Conforming to

SVr4.

See Also

endpwent(3), fgetpwent(3), getpw(3), getpwent(3), getpwnam(3), getpwuid(3), setpwent(3)

Colophon

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Referenced By

fgetpwent(3), getpw(3), getpwent(3), getpwent_r(3), getpwnam(3).

2021-03-22 GNU Linux Programmer's Manual