GNU/Linux man pages
Livre :
Expressions régulières,
Syntaxe et mise en oeuvre :
GNU/Linux |
CentOS 5.1 |
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getpwent(3) |
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getpwent, setpwent, endpwent − get password file entry
#include
<sys/types.h>
#include <pwd.h>
struct passwd *getpwent(void);
void setpwent(void);
void endpwent(void);
The getpwent() function returns a pointer to a structure containing the broken-out fields of a record from the password database (e.g., the local password file /etc/passwd, NIS, and LDAP). The first time it is called it returns the first entry; thereafter, it returns successive entries.
The setpwent() function rewinds to the beginning of the password database.
The endpwent() function is used to close the password database after all processing has been performed.
The passwd structure is defined in <pwd.h> as follows:
struct passwd {
char *pw_name; /* user name */
char *pw_passwd; /* user password */
uid_t pw_uid; /* user ID */
gid_t pw_gid; /* group ID */
char *pw_gecos; /* real name */
char *pw_dir; /* home directory */
char *pw_shell; /* shell program */
};
The getpwent() function returns a pointer to a passwd structure, or NULL if there are no more entries or an error occurs. If an error occurs, errno is set appropriately. If one wants to check errno after the call, it should be set to zero before the call.
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EINTR |
A signal was caught. | ||
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EIO |
I/O error. | ||
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EMFILE |
The maximum number (OPEN_MAX) of files was open already in the calling process. | ||
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ENFILE |
The maximum number of files was open already in the system. | ||
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ENOMEM |
Insufficient memory to allocate passwd structure. | ||
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ERANGE |
Insufficient buffer space supplied. |
/etc/passwd
local password database file
SVr4, 4.3BSD, POSIX.1-2001.
fgetpwent(3), getpw(3), getpwent_r(3), getpwnam(3), getpwuid(3), putpwent(3), passwd(5)
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getpwent(3) | |