getpw - Online Linux Manual PageSection : 3
Updated : 2022-12-15
Source : Linux man-pages 6.03

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NAMEgetpw − reconstruct password line entry

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LIBRARYStandard C library (libc, −lc)

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SYNOPSIS#define _GNU_SOURCE /* See feature_test_macros(7) */ #include <sys/types.h> #include <pwd.h>[[deprecated]] int getpw(uid_t uid, char *buf);

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DESCRIPTIONThe 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:shellThe 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).

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RETURN VALUEThe 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.

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ERRORS0 or ENOENT  No user corresponding to uid. EINVAL  buf is NULL. ENOMEM  Insufficient memory to allocate passwd structure.

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FILES/etc/passwd  password database file

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ATTRIBUTESFor an explanation of the terms used in this section, see attributes(7). InterfaceAttributeValue getpw() Thread safetyMT-Safe locale

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STANDARDSSVr2.

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

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SEE ALSOendpwent(3), fgetpwent(3), getpwent(3), getpwnam(3), getpwuid(3), putpwent(3), setpwent(3), passwd(5) 0

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Johanes Gumabo

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