putspent(3C) manual page
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putspent - write shadow password file entry
#include <shadow.h>
int putspent(const struct spwd *p, FILE *fp);
Unsafe
The putspent() routine is the inverse of getspent(). Given a pointer to
a spwd structure created by the getspent() routine (or the getspnam() routine),
the putspent() routine writes a line on the stream fp, which matches the
format of /etc/shadow. The spwd structure contains the following members:
char *sp_namp;
char *sp_pwdp;
long sp_lstchg;
long sp_min;
long sp_max;
long sp_warn;
long sp_inact;
long sp_expire;
unsigned long sp_flag;
If the sp_min, sp_max, sp_lstchg, sp_warn, sp_inact, or sp_expire field
of the spwd structure is -1, or if sp_flag is 0, the corresponding /etc/shadow
field is cleared.
The putspent() routine returns non-zero if
an error was detected during its operation, otherwise zero.
getpwnam(3C)
,
getspnam(3C)
, putpwent(3C)
This routine is for internal use only,
compatibility is not guaranteed.
Do not use without also using putpwent()
to update the password file.
The use of this function is discouraged.
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