getpw - reconstruct password line entry

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

       The getpw() function is dangerous as it may overflow  the  provided  buffer  buf.   It  is  obsoleted  by
       getpwuid(3).

       The  getpw()  function  reconstructs the password line entry for the given user ID uid in the buffer buf.
       The returned buffer contains a line of format

           name:passwd:uid:gid:gecos:dir:shell

       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;      /* user information */
               char   *pw_dir;        /* home directory */
               char   *pw_shell;      /* shell program */
           };

       For more information about the fields of this structure, see passwd(5).

0 or ENOENT
              No user corresponding to uid.

       EINVALbuf is NULL.

       ENOMEM Insufficient memory to allocate passwd structure.

/etc/passwd
              password database file

       SVr2.

       Standard C library (libc, -lc)

       getpw - reconstruct password line entry

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

       If  uid  is  not  found  in  the  password  database, getpw() returns -1, sets errno to 0, and leaves buf
       unchanged.

endpwent(3), fgetpwent(3), getpwent(3), getpwnam(3), getpwuid(3), putpwent(3), setpwent(3), passwd(5)

Linux man-pages 6.9.1                              2024-05-02                                           getpw(3)

       None.

#define_GNU_SOURCE             /* See feature_test_macros(7) */
       #include<sys/types.h>#include<pwd.h>[[deprecated]]intgetpw(uid_tuid,char*buf);