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man pages section 3: Basic Library Functions

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Updated: Thursday, June 13, 2019
 
 

putpwent(3C)

Name

putpwent - write password file entry

Synopsis

#include <pwd.h>

int putpwent(const struct passwd *p, FILE *f);

Description

The putpwent() function is the inverse of getpwent(). See getpwnam(3C). Given a pointer to a passwd structure created by getpwent(), getpwuid(), or getpwnam(), putpwent () writes a line on the stream f that matches the format of /etc/passwd.

Return Values

The putpwent() function returns a non-zero value if an error was detected during its operation. Otherwise, it returns 0.

Usage

The putpwent() function is of limited utility, since most password files are maintained as Network Information Service (NIS) files that cannot be updated with this function. For this reason, the use of this function is discouraged. If used at all, it should be used with putspent(3C) to update the shadow file.

Attributes

See attributes(7) for descriptions of the following attributes:

ATTRIBUTE TYPE
ATTRIBUTE VALUE
MT-Level
Unsafe

See Also

getpwnam(3C), putspent(3C), attributes(7)