third_party/ulib/musl/src/passwd/getpw_r.c

#include "pwf.h"

#define FIX(x) (pw->pw_##x = pw->pw_##x - line + buf)

static int getpw_r(const char* name, uid_t uid, struct passwd* pw, char* buf, size_t size,
                   struct passwd** res) {
    char* line = 0;
    size_t len = 0;
    int rv = 0;

    rv = __getpw_a(name, uid, pw, &line, &len, res);
    if (*res && size < len) {
        *res = 0;
        rv = ERANGE;
    }
    if (*res) {
        memcpy(buf, line, len);
        FIX(name);
        FIX(passwd);
        FIX(gecos);
        FIX(dir);
        FIX(shell);
    }
    free(line);
    return rv;
}

int getpwnam_r(const char* name, struct passwd* pw, char* buf, size_t size, struct passwd** res) {
    return getpw_r(name, 0, pw, buf, size, res);
}

int getpwuid_r(uid_t uid, struct passwd* pw, char* buf, size_t size, struct passwd** res) {
    return getpw_r(0, uid, pw, buf, size, res);
}