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int getpw(uid_t uid, char *buf); <br>
当您仅需要取得使用者的密码进行比对时，可以使用getpw。 <br>
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另外，有存取一系列使用者资讯的方法。 <br>
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FILE * pwdopen(void); <br>
开启password档案。 <br>
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struct passwd * pwdread(FILE * stream,struct passwd *p); <br>
读取一个使用者资讯进来，填到p中，返回p为成功，NULL为失败。 <br>
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void setpwent(void); <br>
将读取资料流重设到起点。 <br>
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void endpwent(void); <br>
关闭password档案资料流。 <br>
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struct passwd * getpwent(void); <br>
读取一个使用者资讯进来，有必要的话，则将进行开档动作。 <br>
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struct passwd * fgetpwent(FILE * stream); <br>
从档案中读取一个使用者资讯进来。 <br>
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int putpwent(struct passwd *p,FILE *f); <br>
将一个使用者资讯写入档案中。 <br>
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struct passwd * pwdalloc(void); <br>
配置一个记忆体区块给passwd用。 <br>
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Linux程式设计-31.工作群资讯管理(grp) <br>
http://www.openchess.org/noitatsko/programming/ (2001-05-27 22:08:00) <br>
grp.h <br>
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struct group <br>
{ <br>
char * gr_name; <br>
char * gr_passwd; <br>
gid_t gr_gid; <br>
char ** gr_mem; <br>
}; <br>
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FILE * grpopen(void); <br>
开启/etc/group档。 <br>
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struct group * grpread(FILE *stream,struct group *grp); <br>
读取一个group资讯。 <br>
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struct group * grpalloc(void); <br>
配置group记忆体。 <br>
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void setgrent(void); <br>
将group档资料流设定到开始处。 <br>
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void endgrent(void); <br>
关闭group档。 <br>
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struct group * getgrent(void); <br>
读取一项group资讯。 <br>
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struct group * fgetgrent(FILE * stream); <br>
从档案中读取一项group资讯。 <br>
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struct group * getgrgid(gid_t gid); <br>
根据gid读取group资讯。 <br>
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struct group * getgrnam(char *name); <br>
根据group name读取group资讯。 <br>
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int setgroups(size_t n,const gid_t * groups); <br>
??? <br>
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int initgroups(const char *user,gid_t group); <br>
??? <br>
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struct group * grpscan(...); <br>
??? <br>
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