PUTPWENT(3) Linux Programmer's Manual PUTPWENT(3)

putpwent - write a password file entry

#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

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 */
};

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

EINVAL
Invalid (NULL) argument given.

For an explanation of the terms used in this section, see attributes(7).
Interface Attribute Value
putpwent () Thread safety MT-Safe locale

SVr4.

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

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2021-03-22 GNU