putpwent(3) Library Functions Manual putpwent(3)

putpwent - write a password file entry

Standard C library (libc, -lc)

#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)):


    Since glibc 2.19:
    glibc 2.19 and earlier:

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.

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



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

2023-10-31 Linux man-pages 6.7