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#include "sys/types.h"
#include <pwd.h>
#include "stddef.h"
#include "stdio.h"
#include "limits.h"
#include "string.h"
#include "_config.h"
#ifndef LINE_MAX
#define LINE_MAX _POSIX2_LINE_MAX
#endif
struct passwd * getpwnam(const char * name)
{
static char buf[LINE_MAX + 1];
static struct passwd pwd = { 0 };
char *user, *password, *uid, *gid, *gecos, *home, *shell, *nl;
/* TODO: attempt calling first _PWD_CMD */
FILE *db = fopen(_PWD_DB, "r");
if (db == NULL) {
return NULL;
}
while (fgets(buf, sizeof(buf), db) != NULL) {
user = buf;
if ((password = strchr(buf, ':')) != NULL) {
*password = '\0';
password++;
} else {
continue;
}
if (strcmp(user, name) != 0) {
continue;
}
if ((uid = strchr(password, ':')) != NULL) {
*uid = '\0';
uid++;
} else {
continue;
}
if ((gid = strchr(uid, ':')) != NULL) {
*gid = '\0';
gid++;
} else {
continue;
}
if ((gecos = strchr(gid, ':')) != NULL) {
*gecos = '\0';
gecos++;
} else {
continue;
}
if ((home = strchr(gecos, ':')) != NULL) {
*home = '\0';
home++;
} else {
continue;
}
if ((shell = strchr(home, ':')) != NULL) {
*shell = '\0';
shell++;
if ((nl = strchr(shell, '\n')) != NULL) {
*nl = '\0';
}
} else {
continue;
}
pwd.pw_name = user;
pwd.pw_uid = strtoul(gid, NULL, 10);
pwd.pw_gid = strtoul(gid, NULL, 10);
pwd.pw_dir = home;
pwd.pw_shell = shell;
break;
}
fclose(db);
if (strcmp(name, pwd.pw_name) == 0) {
return &pwd;
}
return NULL;
}
/*
POSIX(1)
*/
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