putpwent — write a password file entry


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

int putpwent(const struct passwd *p, FILE *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 */

Return Value

The putpwent() function returns 0 on success, or -1 if an error occurs. In the event of an error, errno is set to indicate the cause.



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

Conforming to


See Also

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


This page is part of release 5.04 of the Linux man-pages project. A description of the project, information about reporting bugs, and the latest version of this page, can be found at https://www.kernel.org/doc/man-pages/.

Referenced By

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

2017-09-15 GNU Linux Programmer's Manual