putpwent(3) — Linux manual page

putpwent(3)              Library Functions Manual             putpwent(3)

NAME         top

       putpwent - write a password file entry

LIBRARY         top

       Standard C library (libc, -lc)

SYNOPSIS         top

       #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         top

       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         top

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

ERRORS         top

       EINVAL Invalid (NULL) argument given.

ATTRIBUTES         top

       For an explanation of the terms used in this section, see
       attributes(7).
       ┌───────────────────────────────┬───────────────┬────────────────┐
       │ Interface                     │ Attribute     │ Value          │
       ├───────────────────────────────┼───────────────┼────────────────┤
       │ putpwent()                    │ Thread safety │ MT-Safe locale │
       └───────────────────────────────┴───────────────┴────────────────┘

STANDARDS         top

       None.

HISTORY         top

       SVr4.

SEE ALSO         top

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

COLOPHON         top

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Linux man-pages 6.15            2025-05-17                    putpwent(3)

Pages that refer to this page: fgetpwent(3),  getpw(3),  getpwent(3),  getpwent_r(3),  getpwnam(3)

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